Apparatus for making glass ribbon and methods

Abstract

Apparatus for making a glass ribbon comprise a forming wedge and at least one edge roller. The at least one edge roller comprises a sleeve coupled to an outer end of a fluid conduit. The sleeve further comprises a plurality of apertures that each define a radial fluid path. Methods of manufacturing a glass ribbon comprise cooling the edge portion of the glass ribbon with a pair of edge rollers. The methods further comprise maintaining a temperature gradient within a first temperature range across a portion of each edge roller of the pair of edge rollers. The methods further comprise maintaining a temperature gradient within a second temperature range across a free end of an end portion of each edge roller of the pair of edge rollers.

Description

APPARATUS FOR MAKING GLASS RIBBON AND METHODSCROSS REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of priority under 35 U.S.C. §119 of U.S. Provisional Application Serial No. 63 / 678181 filed on August 1, 2024, the content of which is relied upon and incorporated herein by reference in its entirety.FIELD

[0002] The present disclosure relates generally to glass manufacturing apparatus for making glass ribbon and methods, and more particularly to glass manufacturing apparatus including at least one edge roller, and methods of manufacturing glass ribbon.BACKGROUND

[0003] Glass manufacturing apparatus are commonly used to form various glass products such as LCD sheet glass. It is known to manufacture sheet glass by downwardly flowing molten glass over a forming wedge and using edge rollers to engage beads formed at opposite end portions of a glass ribbon.SUMMARY

[0004] The following presents a simplified summary of the disclosure to provide a basic understanding of some aspects described in the detailed description.

[0005] Features of the present disclosure provide at least one edge roller having a sleeve with a plurality of apertures that each define a radial fluid path to facilitate maintaining a temperature gradient across portions of the at least one edge roller. Providing at least one edge roller with a sleeve having a plurality of apertures enables the at least one edge roller to handle molten material across a broader range of viscosities, such as a lower viscosity molten material.

[0006] In aspects, apparatus for making a glass ribbon comprise a forming wedge. The forming wedge comprises a pair of downwardly inclined forming surface portions converging along a downstream direction to form a root. The apparatus further comprise at least one edge roller configured to contact an edge portion of the glass ribbon. The at least one edge roller comprises a cylindrical body. The cylindricalbody comprises a cylindrical wall circumscribing a rotational axis of the cylindrical body, and an outer end wall attached to an outer end of the cylindrical wall. An inner cylindrical surface of the cylindrical wall and an inner surface of the outer end wall at least partially define a chamber of the cylindrical body. The at least one edge roller further comprises a shaft coupled to the cylindrical body and configured to rotate the cylindrical body about the rotational axis. The at least one edge roller still further comprises a sleeve coupled to an outer end of a fluid conduit. The sleeve comprises a plurality of apertures that each define a radial fluid path extending along an outer radial direction from a passageway of the sleeve toward the inner cylindrical surface of the cylindrical wall.

[0007] In further aspects, methods of manufacturing glass ribbon comprise flowing molten glass over a pair of downwardly inclined forming surface portions of a forming wedge. The methods further comprise drawing the molten glass from a root of the forming wedge to form the glass ribbon. The methods further comprise engaging an edge portion of the glass ribbon with a pair of edge rollers positioned downstream from the root. The methods further comprise cooling the edge portion of the glass ribbon with the pair of edge rollers. The methods further comprise maintaining a temperature gradient within a first temperature range across a portion of each edge roller of the pair of edge rollers that engages the edge portion of the glass ribbon. The methods still further comprise maintaining a temperature gradient within a second temperature range across a free end of an end portion of each edge roller of the pair of edge rollers that does not engage the glass ribbon, wherein an average temperature of the temperature gradient of the second temperature range is greater than an average temperature of the temperature gradient of the first temperature range.

[0008] Additional features and advantages of the aspects disclosed herein will be set forth in the detailed description that follows, and in part will be clear to those skilled in the art from that description or recognized by practicing the aspects described herein, including the detailed description which follows, the claims, as well as the appended drawings. It is to be understood that both the foregoing general description and the following detailed description present aspects intended to provide an overview or framework for understanding the nature and character of the aspects disclosed herein. The accompanying drawings are included to provide further understanding and are incorporated into and constitute a part of this specification. Thedrawings illustrate various aspects of the disclosure, and together with the description explain the principles and operations thereof.BRIEF DESCRIPTION OF THE DRAWINGS

[0009] These and other features, aspects and advantages are better understood when the following detailed description is read with reference to the accompanying drawings, in which:

[0010] FIG. 1 is a schematic view illustrating an apparatus for making a glass ribbon in accordance with aspects of the present disclosure;

[0011] FIG. 2 is a cross-sectional perspective view of the apparatus for making a glass ribbon taken along line 2-2 of FIG. 1;

[0012] FIG. 3 is a schematic cross-sectional view of an edge roller taken along line 3-3 of FIG. 2 illustrating a sleeve in accordance with aspects of the present disclosure;

[0013] FIG. 4 is a schematic side view of an embodiment of the sleeve of the edge roller of FIG. 3 in accordance with aspects of the present disclosure;

[0014] FIG. 5 is a schematic cross-sectional view of the sleeve taken along line 5-5 of FIG. 4 in accordance with aspects of the present disclosure;

[0015] FIG. 6 is a schematic side view of another embodiment of the sleeve of the edge roller of FIG. 3 in accordance with aspects of the present disclosure;

[0016] FIG. 7 is a schematic cross-sectional view of the sleeve taken along line 7-7 of FIG. 6 in accordance with aspects of the present disclosure;

[0017] FIG. 8 is a schematic side view of another embodiment of the sleeve of the edge roller of FIG. 3 in accordance with aspects of the present disclosure;

[0018] FIG. 9 is a schematic cross-sectional view of the sleeve taken along line 9-9 of FIG. 8 in accordance with aspects of the present disclosure;

[0019] FIG. 10 is a schematic side view of another embodiment of the sleeve of the edge roller of FIG. 3 in accordance with aspects of the present disclosure;

[0020] FIG. 11 is a schematic cross-sectional view of the sleeve taken along line 11-11 of FIG. 10 in accordance with aspects of the present disclosure;

[0021] FIG. 12 is a schematic cross-sectional view of the sleeve of the edge roller of FIG. 3 taken along line 12-12 of FIGS. 4, 6, 8 and 10 in accordance with aspects of the present disclosure;

[0022] FIG. 13 is a schematic cross-sectional view of the sleeve of the edge roller of FIG. 3 taken along line 13-13 of FIGS. 4, 6, and 8 in accordance with aspects of the present disclosure;

[0023] FIG. 14 is a schematic side view of another embodiment of the sleeve of the edge roller of FIG. 3 in accordance with aspects of the present disclosure;

[0024] FIG. 15 is a schematic cross-sectional view of the sleeve taken along line 15-15 of FIG. 14 in accordance with aspects of the present disclosure;

[0025] FIG. 16 is a schematic cross-sectional view the sleeve of the edge roller of FIG. 3 taken along line 16-16 of FIG. 14 in accordance with aspects of the present disclosure;

[0026] FIG. 17 is a schematic side view of another embodiment of the sleeve of the edge roller of FIG. 3 in accordance with aspects of the present disclosure;

[0027] FIG. 18 is a schematic cross-sectional view of the sleeve taken along line 18-18 of FIG. 17 in accordance with aspects of the present disclosure;

[0028] FIG. 19 is a schematic cross-sectional view of the sleeve of the edge roller of FIG. 3 taken along line 19-19 of FIG. 17 in accordance with aspects of the present disclosure;

[0029] FIG. 20 is a schematic cross-sectional view of the sleeve of the edge roller of FIG. 3 taken along line 20-20 of FIG. 17 in accordance with aspects of the present disclosure;

[0030] FIG. 21 is a graphical illustration showing maintaining a temperature gradient within a first temperature range across a portion of an edge roller in accordance with aspects of the present disclosure;

[0031] FIG. 22 is a schematic cross-sectional view taken along line 3-3 of FIG. 2 illustrating the portion of the edge roller that corresponds to the graphical illustration of FIG. 21;

[0032] FIG. 23 is a graphical illustration showing maintaining a temperature gradient within a second temperature range across a portion of an edge roller in accordance with aspects of the present disclosure;

[0033] FIG. 24 is a schematic front view taken at line 23-23 of FIG. 3 illustrating the cross-sectional half of the edge roller of FIG. 3 that corresponds to the graphical illustration of FIG. 23.DETAILED DESCRIPTION

[0034] Aspects will now be described more fully hereinafter with reference to the accompanying drawings in which example aspects are shown. Whenever possible, the same reference numerals are used throughout the drawings to refer to the same or like parts. However, this disclosure may be embodied in many different forms and should not be construed as limited to the aspects set forth herein.

[0035] As used herein, the term “about” means that amounts, sizes, formulations, parameters, and other quantities and characteristics are not, and need not be, exact, but may be approximate and / or larger or smaller, as desired, reflecting tolerances, conversion factors, rounding off, measurement error and the like, and other factors known to those of skill in the art.

[0036] Ranges can be expressed herein as from “about” one value, and / or to “about” another value. When such a range is expressed, aspects include from the one value to the other value. Similarly, when values are expressed as approximations by use of the antecedent “about,” it will be understood that the value forms another aspect. It will be further understood that the endpoints of each of the ranges are significant both in relation to the other endpoint, and independently of the other endpoint.

[0037] Directional terms as used herein - for example up, down, right, left, front, back, top, bottom, upper, lower, etc. - are made only with reference to the figures as drawn and are not intended to imply absolute orientation.

[0038] Unless otherwise expressly stated, it is in no way intended that any methods set forth herein be construed as requiring that its steps be performed in a specific order, nor that with any apparatus, specific orientations be required. Accordingly, where a method claim does not actually recite an order to be followed by its steps, or that any apparatus claim does not actually recite an order or orientation to individual components, or it is not otherwise specifically stated in the claims or description that the steps are to be limited to a specific order, or that a specific order or orientation to components of an apparatus is not recited, it is in no way intended that an order or orientation be inferred in any respect. This holds for any possible non-express basis for interpretation, including matters of logic relative to arrangement of steps, operational flow, order of components, or orientation of components; plain meaning derived from grammatical organization or punctuation, and; the number or type of aspects described in the specification.

[0039] As used herein, the singular forms "a," "an" and "the" include plural references unless the context clearly dictates otherwise. Thus, for example, reference to “a” component includes aspects having two or more such components, unless the context clearly indicates otherwise.

[0040] The word “exemplary,” “example,” or various forms thereof are used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” or as an “example” should not be construed as preferred or advantageous over other aspects or designs. Furthermore, examples are provided solely for purposes of clarity and understanding and are not meant to limit or restrict the disclosed subject matter or relevant portions of this disclosure in any manner. It can be appreciated that a myriad of additional or alternate examples of varying scope could have been presented but have been omitted for purposes of brevity.

[0041] As used herein, the terms “comprising” and “including”, and variations thereof, shall be construed as synonymous and open-ended, unless otherwise indicated. A list of elements following the transitional phrases comprising or including is a nonexclusive list, such that elements in addition to those specifically recited in the list may also be present.

[0042] The terms “substantial,” “substantially,” and variations thereof as used herein are intended to represent that a described feature is equal or approximately equal to a value or description. For example, a “substantially planar” surface is intended to denote a surface that is planar or approximately planar. Moreover, “substantially” is intended to denote that two values are equal or approximately equal. The term “substantially” may denote values within about 10% of each other, for example, within about 5% of each other, or within about 2% of each other.

[0043] Modifications may be made to the instant disclosure without departing from the scope or spirit of the claimed subject matter. Unless specified otherwise, “first,” “second,” or the like are not intended to imply a temporal aspect, a spatial aspect, an ordering, etc. Rather, such terms are merely used as identifiers, names, etc. for features, elements, items, etc. For example, a first end and a second end generally correspond to end A and end B or two different ends.

[0044] Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, embodiments of the disclosure should not be construed as limited to the particular shapes of regions illustrated herein, but are to include deviations in shapes that result,for example, from manufacturing. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0045] FIG. 1 illustrates a schematic view of an exemplary apparatus 101 for making a glass ribbon 103 according to an embodiment of the present disclosure.

[0046] Referring to FIG. 1 , an apparatus 101 for making a glass ribbon can include a melting vessel 105 configured to receive batch material 107 from a storage bin 109. The batch material 107 can be introduced by a batch delivery device 111 powered by a motor 113. An optional controller 115 can be configured to activate the motor 113 to introduce a desired amount of batch material 107 into the melting vessel 105, as indicated by arrow 117. A glass level metal probe 119 can be used to measure a glass melt 121 level within a standpipe 123 and communicate the measured information to the controller 115 by way of a communication line 125.

[0047] The apparatus 101 for making a glass ribbon can also include a fining vessel 127, such as a fining tube, located downstream from the melting vessel 105 and coupled to the melting vessel 105 by way of a first connecting tube 129. A mixing vessel 131 such as a stir chamber, can also be located downstream from the fining vessel 127 and a delivery vessel 133, such as a bowl, may be located downstream from the mixing vessel 131. As shown, a second connecting tube 135 can couple the fining vessel 127 to the mixing vessel 131 and a third connecting tube 137 can couple the mixing vessel 131 to the delivery vessel 133. As further illustrated, an exit conduit 139 can be positioned to deliver glass melt 121 from the delivery vessel 133 to an inlet 141 of a forming vessel 144. As shown, the melting vessel 105, fining vessel 127, the mixing vessel 131, delivery vessel 133, and forming vessel 144 are examples of glass melt stations that may be located in series along the apparatus 101 for making a glass ribbon.

[0048] The melting vessel 105 is typically made from a refractory material, such as refractory (e.g. ceramic) brick. The apparatus 101 for making a glass ribbon may further include components that are typically made from platinum or platinum- containing metals such as platinum-rhodium, platinum-iridium and combinations thereof, but which may also comprise such refractory metals such as molybdenum, palladium, rhenium, tantalum, titanium, tungsten, ruthenium, osmium, zirconium, and alloys thereof and / or zirconium dioxide. The platinum -containing components can include one or more of the first connecting tube 129, the fining vessel 127 (e.g., finer tube), the second connecting tube 135, the standpipe 123, the mixing vessel 131 (e.g.,a stir chamber), the third connecting tube 137, the delivery vessel 133 (e.g., a bowl), the exit conduit 139 and the inlet 141. The forming vessel 144 is also made from a refractory material and is designed to form the glass ribbon 103.

[0049] FIG. 2 is a cross-sectional perspective view of a fusion drawing machine 143 along line 2-2 of the apparatus 101 for making glass of FIG. 1. As shown, the fusion drawing machine 143 includes a forming wedge 201 comprising a pair of downwardly inclined forming surface portions 207, 209 extending between opposed ends of the forming wedge 201. The pair of downwardly inclined forming surface portions 207, 209 converge along a downstream direction 211 to form a root 213. A draw plane 215 extends through the root 213 wherein the glass ribbon 103 may be drawn in the downstream direction 211 along the draw plane 215. As shown, the draw plane 215 can bisect the root 213 although the draw plane 215 may extend at other orientations with respect to the root 213.

[0050] The fusion drawing machine 143 may comprise one or more edge directors intersecting with at least one of the pair of downwardly inclined forming surface portions 207, 209; however FIG. 2 illustrates one example edge director 217, with the understanding that, in some examples, more than one similar or identical edge director can be included. In some examples, the edge director 217 can intersect with both downwardly inclined forming surface portions 207, 209. In some examples, the edge director 217 may include a lower portion 225 and an upper portion 224. Although the upper portion 224 is illustrated as being present on the downwardly inclined forming surface portion 207 in FIG. 2, the upper portion 224 may be provided on each of the pair of downwardly inclined forming surface portions 207, 209. The upper portion 224 may be defined by the downwardly inclined forming surface portion 207, the first opposed end 203, and a first surface 221 of the edge director 217. The first surface 221 may be substantially planar, but may also be concave or have other surface features. The lower portion 225 of the edge director 217 may include a second surface 222 and a third surface 223. The second surface 222 may extend from the first surface 221 and converge downstream of the draw plane 215 from the root 213. The second surface 222 may be curved or planar. The third surface 223 may be a plane extending in a lateral direction from an edge of the second surface 222. An upper portion and a lower portion that are mirror-symmetric to the upper portion 224 and the lower portion 225 or have selectively different structures therefrom are also present on theforming surface portion 209 at an opposite side of the forming surface portion 207. Particularly, the upper portion and / or the lower portion provided at the forming surface portion 209 may be integrally configured with or separately configured from the upper portion 224 and / or the lower portion 225 provided at the forming surface portion 207.

[0051] In further examples, an edge director (e.g., similar to or identical to the edge director 217) can be positioned at each of the opposed ends of the forming wedge 201 wherein an edge of the glass ribbon 103 is formed by molten glass flowing off the edge directors. The one or more edge directors and the forming wedge 201 constitute a forming apparatus 202. For instance, as shown in FIG. 2, the edge director 217 can be positioned at a first opposed end 203 and a second identical edge director (not shown) can be positioned at a second opposed end (not shown). The one or more edge directors can be configured to intersect with both of the downwardly inclined forming surface portions 207, 209. The one or more edge directors can be substantially identical to one another although the edge directors may have different characteristics in further examples. Various forming wedge and edge director configurations may be used in accordance with embodiments of the present disclosure. For example, embodiments of the present disclosure may be used with forming wedges and edge director configurations disclosed in U.S. Pat. Nos. 3,451,798, 3,537,834, 7,409,839 and / or U.S. Provisional Pat. Application No. 61 / 155,669, filed Feb. 26, 2009 that are each herein incorporated by reference in its entirety.

[0052] Referring to FIGS. 1 and 2, the fusion drawing machine 143 can further comprise at least one edge roller 301 (described hereinafter) configured to contact an edge portion 146a, 146b of the glass ribbon 103. In some examples, the at least one edge roller 301 can comprise a first pair of edge rollers 145a configured to work a first edge bead 147a of the first edge portion 146a of the glass ribbon 103 drawn from the root 213 within a viscous zone of the glass ribbon 103. The first pair of edge rollers 145a can work the first edge bead 147a by pressing the edges of the molten glass flowing off of the inclined surface portions 207, 209 together to provide a we 11 -formed first edge bead 147a. Uikewise, the at least one edge roller 301 can further comprise a second pair of edge rollers 145Z> configured to work a second edge bead 147Z> of the second edge portion 146Z> of the glass ribbon 103. One or more motors 153a may be provided torotate the first pair of edge rollers 145a. One or more motors 153Z> may be provided to rotate the second pair of edge rollers 145b. In some aspects, the at least one edge roller 301 can be located at various positions within the viscous region of the glass being drawn from the root 213. For instance, the edge rollers can be located anywhere from immediately below the root 213 to a position about 15 inches below the root 213 although other positions may be contemplated in further examples. In still another example, the at least one edge roller can be located at a position within a range of from about 8 inches to about 10 inches below the root 213.

[0053] Turning to FIG. 3, in accordance with aspects of the present disclosure, a cross-sectional view along line 3-3 of FIG. 2 of the at least one edge roller 301 of the fusion drawing machine 143 is shown. It should be understood that in some examples the at least one edge roller 301 described hereinafter can comprise only one or both of the edge rollers of the first pair of edge rollers 145a. Additionally and / or alternatively, the at least one edge roller 301 can comprise only one or both of the edge rollers of the second pair of edge rollers 145b. It should be further understood that while only one edge roller is described hereinafter, the at least one edge roller 301 can comprise any number of edge rollers (e.g., the first pair of edge rollers 145a, the second pair of edge rollers 145b, and / or any other number of edge rollers that may be included with the fusion drawing machine 143). Furthermore, hereinafter the at least one edge roller 301 will be described with reference to the first pair of edge rollers 145a (shown in FIG. 2) with the understanding that the second pair of edge rollers 145b (or any other pair of edge rollers), in some examples, may be similar or identical to the first pair of edge rollers 145a.

[0054] As shown in FIG. 3, the at least one edge roller 301 comprises a cylindrical body 303 including a cylindrical wall 305 circumscribing a rotational axis 307. As illustrated, an outer end wall 309 can be attached to an outer end of the cylindrical wall 305 and can define a free end 311 of the edge roller 301. The term “free end” throughout the disclosure means and outer end that is not supported or constrained. In aspects, an inner cylindrical surface 313 of the cylindrical wall 305 and an inner surface 315 of the outer end wall 309 can at least partially define a chamber 317 of the cylindrical body 303.

[0055] The cylindrical body 303 can also include an outer cylindrical knurled surface 319. In aspects, the outer cylindrical knurled surface 319 can be defined by at least a portion of the cylindrical wall 305. In some aspects, the outer cylindricalknurled surface 319 can be formed by a plurality of knurled protrusions that extend radially outward from the cylindrical wall 305 with respect to the rotational axis 307. In further aspects, the outer cylindrical knurled surface 319 can be formed from an insert and coupled to the at least one edge roller 301. In one non-limiting example, the cylindrical wall 305 of the cylindrical body 303 can comprise a recess / groove (e.g., formed between one or more of its end portions) configured to receive the insert (e.g., a cylindrical insert with knurled protrusions extending therefrom). In some such examples, the insert can sit within the recess / groove and circumferentially surround at least a portion of the cylindrical wall 305 of the cylindrical body 303 such that the insert remains flush with respect to the non-recessed portions of the cylindrical wall 305 of the cylindrical body 303. Accordingly, in such an example, only the knurls of the outer cylindrical knurled surface 319 would extend from the cylindrical wall 305 of the cylindrical body 303. Any other suitable cylindrical knurled surface may be utilized in combination with the cylindrical body 303. In some aspects, the outer cylindrical knurled surface 319 can be beneficial in facilitating proper finishing of the edge portions 146a, 146Z> of the glass ribbon 103. Edge roller finishing provides desired edge characteristics and proper fusion of the edge portions 146a, 146Z> of the molten glass being pulled opposed surfaces of the edge directors 217 associated with the pair of downwardly included forming surface portions 207, 209.

[0056] In aspects, the at least one edge roller 301 can comprise a shaft 320 coupled to the cylindrical body 303 and configured to rotate (e.g., by the one or more motors 153a) the cylindrical body 303 about the rotational axis 307. For example, as shown in FIG. 2, the shaft 320 can be configured to rotate in a clockwise and / or counter clockwise direction (indicated by arrows 227 and 229). In some aspects where the at least one edge roller 301 comprises a pair of corresponding edge rollers (e.g., the first pair of edge rollers 145a, the second pair of edge rollers 145 / ?. and / or the like), each edge roller of the corresponding pair of edge rollers can rotate in a different direction, such as for example, one edge roller can rotate clockwise and the other corresponding edge roller can rotate counterclockwise. It should be understood that the terms “clockwise” and “counterclockwise” are utilized herein solely for explanatory purposes and to facilitate understanding. Accordingly, the terms “clockwise” and “counterclockwise” are not meant to be limiting, and thus the rotational direction of the shaft 320 may vary depending upon the specific configuration and spatial orientation of each edge roller. In some aspects, the shaft320 can be configured to move relative to the downstream direction 211 (e.g., as indicated by arrows 231), such as for example, the one or more motors 153a can move along a track (not shown) to move the shaft 320, and thereby moving the at least one edge roller 301 relative to the downstream direction 211. The shaft 320 can be coupled to the cylindrical body 303 any number of suitable ways, such as for example, the shaft 320 can be coupled by a mechanical coupling means (e.g., screws, bolts, etc.) or the shaft 320 can be formed integrally with the cylindrical body 303 (e.g., by welding and / or a casting process).

[0057] In some aspects, the at least one edge roller 301 can comprise a sleeve 323 coupled to an outer end 324 of a fluid conduit 321. In some aspects, the fluid conduit 321 can define an axial fluid path 322 extending toward the outer end wall 309 of the cylindrical body 303. In aspects, the outer end 324 of the fluid conduit 321 can extend within the chamber 317. In some aspects, the fluid conduit 321 can comprise a tubular member, such as for example, a hollow pipe. However, the fluid conduit 321 can comprise any other suitable shape, such as for example, rectangular conduits, square conduits, elliptical conduits, and / or the like. In aspects, the fluid conduit 321 can comprise any suitable material, such as for example, metals, plastics, ceramics, and / or the like. In aspects, the sleeve 323 can comprise a plurality of apertures 400, 600, 800, 1000, 1400, 1700 (shown generally) that each can define a radial fluid path 328 extending along an outer radial direction from a passageway 325 of the sleeve 323 toward the inner cylindrical surface 313 of the cylindrical wall 305.

[0058] In aspects, the passageway 325 can extend between a first end portion 327 of the sleeve 323 and a second end portion 329 of the sleeve 323 in a direction of the rotational axis 307 of the cylindrical body 303. In some aspects, the sleeve 323 can be positioned within the chamber 317 (e.g., fully within the chamber 317 or partially within the chamber 317). The sleeve 323 can be coupled to the outer end 324 of the fluid conduit 321 any suitable way. In some aspects, the second end portion 329 of the sleeve 323 can be coupled to the outer end 324 of the fluid conduit 321. In some such examples, the second end portion 329 of the sleeve 323 can be coupled to the outer end 324 of the fluid conduit 321 any number of suitable ways. In one nonlimiting example, as shown in FIG. 3, the sleeve 323 can comprise a coupling feature 333 located on the second end portion 329 of the sleeve 323. In some such examples, the coupling feature 333 of the sleeve 323 can comprise a receptacle that contours to an outer surface of the outer end 324 of fluid conduit 321 and is configured to receivethe outer end 324 of the fluid conduit 321. In this way, when the outer end 324 of the fluid conduit 321 is received within the receptacle of the coupling feature 333, the sleeve 323 and the fluid conduit 321 will be coupled together (e.g., screwed together). Furthermore, in some such examples, the outer end 324 of the fluid conduit 321 can be press fit within the receptacle of the sleeve 323. In yet another such example, the outer end 324 of the fluid conduit 321 can be adhered within the receptacle of the sleeve 323, such as for example, with an adhesive. In yet another such example, the outer end 324 of the fluid conduit 321 can be welded within the receptacle of the sleeve 323. In some examples, not shown, the sleeve 323 can be coupled using a mechanical coupling means, such as for example, screws, bolts, nuts, fasteners, fixtures and / or the like. In another non-limiting example, not shown, the sleeve 323 can be integrally formed as part of the fluid conduit 321, such as for example, by welding and / or by a casting process. Any other suitable means of coupling the sleeve 323 to the outer end 324 of the fluid conduit 321 can be utilized. It can be appreciated, in some aspects, that by providing the coupling feature 333, the sleeve 323 be retrofitted to already existing edge rollers, and thus can reduce the costs associated with implementing the sleeve 323 within an edge roller.

[0059] In further aspects, as shown generally in FIG. 3, the plurality of apertures 400, 600, 800, 1000, 1400, 1700 can extend from the passageway 325 to an outer peripheral surface 337 of the sleeve 323. For example, each aperture of the plurality of apertures 400, 600, 800, 1000, 1400, 1700 can extend from an inner surface 339 defining the passageway 325 of the sleeve 323 to the outer peripheral surface 337 of the sleeve 323. In this way, the fluid conduit 321 will be in fluid communication with the passageway 325 of the sleeve 323 which will further be in fluid communication with the chamber 317. In order to demonstrate this principle, fluid (e.g., a cooling fluid, such as for example, air, water, refrigerant, and / or the like) can then enter the fluid conduit 321 (e.g., by way of a fluid pump) and travel along the axial fluid path 322 towards the sleeve 323. Upon reaching the outer end 324 of the fluid conduit 321, the fluid can then travel from the outer end 324 of the fluid conduit 321 and into the second end portion 329 of the sleeve 323 by way of the passageway 325, as a result of the sleeve 323 and the fluid conduit 321 being coupled together. Once the fluid has traveled into the passageway 325, the fluid can then travel from the passageway 325 into the chamber 317 through each aperture of the plurality of apertures 400, 600, 800, 1000, 1400, 1700 along corresponding radial fluid paths 328.

[0060] It should be understood that while the sleeve 323 has been described above as being positioned within the chamber 317, the sleeve 323 can alternatively be positioned partially within the chamber 317. For example, a part of the second end portion 329 of the sleeve 323 can be positioned outside of the chamber 317 while the first end portion 327 of the sleeve 323 extends into the chamber 317. Furthermore, in such an example for instance, while the outer end 324 of the fluid conduit 321 has been described above as extending within the chamber 317, in further examples, the fluid conduit 321 can be positioned entirely outside of the chamber 317 with only the sleeve 323 (e.g., a portion or the entire sleeve 323) extending into the chamber 317.

[0061] As schematically shown in FIG. 3, the at least one edge roller 301 can further comprises an insulating material disposed within the chamber 317 and positioned between the sleeve 323 and the inner surface 315 of the outer end wall 309. For example, in aspects, the insulating material can comprise an insulating layer 341 disposed on the inner surface 315 of the outer end wall 309. In some aspects, the insulating layer 341 can be disposed over substantially the entire inner surface 315 of the outer end wall 309. In one non-limiting example where the chamber 317 of the at least one edge roller 301 comprises a cylindrical chamber such that the outer end wall 309 can comprise a circular shape (e.g., to enclose the cylindrical chamber), the insulating layer 341 can comprise a diameter that is substantially equal to a diameter of the cylindrical chamber. In this way, the insulating layer 341 can be disposed over substantially the entire inner surface 315 of the outer end wall 309. In other examples, such as where the chamber 317 is not cylindrical, the insulating layer 341 can contour to the inner surface of the chamber 317 to be disposed over substantially the entire inner surface 315 of the outer end wall 309. Alternatively, in some examples, the insulating layer 341 does not have be disposed over substantially the entire inner surface 315 of the outer end wall 309. For example, the insulating layer 341 can be disposed over a portion of the inner surface 315 of the outer end wall 309. It can be appreciated that a temperature gradient of the outer end wall 309 can be selectively controlled by altering the distribution of the insulating layer 341 on the inner surface 315 of the outer end wall 309. For example, by increasing the coverage area of the insulating layer 341 on the inner surface 315 of the outer end wall 309, an greater temperature (e.g., the temperature across the outer end wall 309 will be hotter) can be maintained across the outer end wall 309. For example, by increasing the coverage area of the insulating layer 341, less fluid (e.g., cooling fluid) from the fluid conduit321 can be exposed to the inner surface 315 of the outer end wall 309, thereby increasing the outer end wall 309 temperature. Similarly, by decreasing the coverage area of the insulating layer 341 on the inner surface 315 of the outer end wall 309, a lower temperature (e.g., the temperature across the outer end wall 309 will be colder) can be maintained across the outer end wall 309. For example, by decreasing the coverage area of the insulating layer 341, more fluid (e.g., cooling fluid) from the fluid conduit 321 can be exposed to the inner surface 315 of the outer end wall 309, thereby cooling the outer end wall 309. In some aspects, not shown, the insulating layer 341 can be disposed over various portions of the inner surface 315 of the outer end wall 309 to selectively control a temperature gradient across the outer end wall 309. For example, the portion(s) covered by the insulating layer 341 will maintain a higher temperature, while portions not covered will maintain a lower temperature. In some examples, the insulating layer 341 can comprise holes or gaps, for example, that extends through the insulating layer 341 to the inner surface 315 of the outer end wall 309.

[0062] In one particular non-limiting example, as illustrated generally by the dashed lines 343 in FIG. 3, the insulating layer 341 can comprise a chamfered periphery (e.g., having a peripheral surface extending at an angle 345) in order to compensate for a thickness of the insulating layer 341. For example, by including the chamfered periphery, more fluid (e.g., cooling fluid) can be exposed to the portion of the inner cylindrical surface 313 of the cylindrical wall 305 where the thickness of the insulating layer 341 would otherwise be disposed. In aspects, it can be appreciated that by providing the insulating layer 341 with the chamfered periphery, a more uniform temperature distribution can be achieved across the cylindrical wall 305, thereby mitigating localized temperature increases at regions otherwise covered by the thickness of the insulating layer 341, while also simultaneously maintaining a higher uniform temperature distribution across the outer end wall 309.

[0063] In further aspects, the insulating layer 341 can comprise a cast insulating layer. For example, the insulating layer 341 can be cast directly into the chamber 317 of the cylindrical body 303. In this way, the insulating layer 341 can directly contour to both the inner surface 315 of the outer end wall 309 and the inner cylindrical surface 313 of the cylindrical wall 305. It can be appreciated, in aspects, that a cast insulating layer can provide a better insulation between the chamber 317 and the outer end wall 309 by reducing or eliminating undesired gaps between thechamber 317 and the outer end wall 309. Furthermore, it can be appreciated, in aspects, that a cast insulating layer can allow an existing edge roller to be retrofitted with both the sleeve 323 (explained in greater detail hereinafter) and the insulating layer 341. For example, because the insulating layer 341 can be cast directly into the chamber 317 in a molten state, only a small opening is required to cast the insulating layer 341 into an existing edge roller. In some aspects, the cast insulating layer can comprise any suitable material or combination of materials, such as for example but not limited to, silicon dioxide (SiO2), calcium oxide (CaO), magnesia (MgO), aluminum oxide (A12O3), and / or the like. Any other suitable material can be utilized for the insulating layer 341, including other suitable castable material(s) and / or noncastable materials.

[0064] It can be appreciated that by disposing the insulating layer 341 within the chamber 317 (e.g., as opposed to on the outside of an edge roller as is traditionally done) manufacturing costs can be reduced. For example, since the insulating layer 341 will not be directly exposed to molten material (e.g., molten glass), the insulating layer 341 will not degrade as fast over time. Accordingly, this will increase downtime in manufacturing associated with replacing the insulating layer. Furthermore, disposing the insulating layer within the chamber 317 can avoid complications that may otherwise develop if the insulating layer is mounted outside of the edge roller.

[0065] In some aspects, the at least one edge roller 301 can comprise a retaining element 347 disposed between the sleeve 323 and the insulating layer 341. In some aspects, the retaining element 347 can comprise a disk, as shown in FIG. 3. However, the retaining element 347 can be any other suitable shape, such as for example, square, rectangular, and / or the like. In further aspects, the retaining element 347 can be formed integrally as part of the sleeve 323. In other aspects, the retaining element 347 can be coupled to the sleeve 323. In yet another aspect, the retaining element 347 can be free floating and held against the insulating layer 341 by a force exerted on the retaining element 347 by the sleeve 323, such as for example, when the sleeve 323 and the fluid conduit 321 are mounted within the chamber 317. It can be appreciated, in some aspects, that the retaining element 347 can provide an increased surface area to greater distribute a maintaining force applied to the insulating layer 341, thereby preventing the insulating layer 341 from moving axially (e.g., along the rotational axis 307) within the chamber 317, as a result of thermal expansion and contraction of the insulating layer 341. In this way, the retaining element 347 canincrease the uniformness of the temperature gradient along the outer end wall 309 by minimizing air gaps and / or the like that may be caused by movement of the insulating layer 341. It should be understood that while the retaining element 347 can further prevent axial movement of the insulating layer 341 (e.g., as a result of thermal expansion and contraction), the retaining element 347 can be omitted without otherwise effecting the functionality of the at least one edge roller 301, or without departing from the nature of the present disclosure.

[0066] FIGS. 4-13 will now be utilized hereinafter to discuss various embodiments of the sleeve 323, and more particularly, to discuss various embodiments of the plurality of apertures 400, 600, 800, 1000 of the sleeve 323. The embodiments of the sleeve 323 shown in FIGS. 4-13 will be discussed hereinafter more generally, and then each embodiment shown in FIGS. 4-13 will be discussed more particularly accompanying the following general description. It should be understood that each embodiment shown can interchangeably and / or additionally include any of the features of any other embodiments shown in any one of FIGS. 4-13 or described herein without departing from this disclosure, which will become more clear hereinafter. For example, while FIGS. 4 and 5 may be utilized to discuss a specific embodiment (e.g., for the plurality of apertures 400, 600, 800, 1000), it should be understood that one or more of these features can be utilized additionally and / or alternatively with any other embodiment discussed hereinafter (or above).

[0067] Turning specifically to FIGS. 4-11, the sleeve 323, the outer end wall 309 of the cylindrical body 303, the insulating layer 341, and the retaining element 347 are schematically shown and will be utilized hereinafter to discuss various features in accordance with the present disclosure. It should be understood that various other features of the at least one edge roller 301 described previously (e.g., the shaft 320, the cylindrical wall 305, etc.) have been omitted for clarity and ease of explanation. However, it can be appreciated that any of the omitted features described previously can be utilized in conjunction with any of the features described below.

[0068] In aspects, as shown in FIGS. 4-11, the plurality of apertures 400, 600, 800, 1000 can comprise a first plurality of apertures 401, 601, 801, 1001 that are each spaced a first axial distance 403, 603, 803, 1003 from the inner surface 315 of the outer end wall 309. In some aspects, the first axial distance 403, 603, 803, 1003 can be measured by taking a shortest axial distance from the inner surface 315 of the outer end wall 309 to about a centroid of an opening of each aperture of the first plurality ofapertures 401, 601, 801, 1001 on the outer peripheral surface 337 of the sleeve 323. For example, in some aspects, where the opening of an aperture of the first plurality of apertures 401, 601, 801, 1001 on the outer peripheral surface 337 of the sleeve 323 is circular, the centroid would be the point that is equidistant from all points around a circumference of the circular opening. As shown in FIGS. 4, 6, 8, and 10, a dashed line 405, 605, 805, 1005 schematically illustrates a vertical line running substantially parallel with the inner surface 315 of the outer end wall 309 that would pass through the centroid of the first plurality of apertures 401, 601, 801, 1001. The shortest axial distance can be measured from the inner surface 315 of the outer end wall 309 to the vertical line. The first axial distance 403, 603, 803, 1003 can be any suitable distance from the inner surface 315 of the outer end wall 309, such as for example, but not limited to, an axial distance of from about 1.4 cm to about 1.9 cm. It should be understood from the above that the centroid, for purposes of measuring the first axial distance 403, 603, 803, 1003, can change with the shape of the opening of each aperture of the first plurality of apertures 401, 601, 801, 1001 on the outer peripheral surface 337 of the sleeve 323 and thus will need to be determined prior to measuring the first axial distance 403, 603, 803, 1003.

[0069] With additional reference to FIG. 12, a schematical cross-sectional area taken along line 12-12 of FIGS. 4, 6, 8, and 10 illustrating the first plurality of apertures 401, 601, 801, 1001 is shown. It should be understood that FIG. 12 is provided for explanatory purposes to more clearly describe various features in accordance with the present disclosure. Accordingly, FIG. 12 should not be construed as imposing any unnecessary limitations on the structural aspects of the embodiments described herein. Thus, it should be understood that the actual structures may vary from the schematical representation shown in FIG. 12. More specifically, the cross- sectional area of some apertures may look different in certain aspects than actually illustrated in FIG. 12. However, FIG. 12 can be utilized schematically to illustrate similarities between these differing cross-sectional areas, without being construed as imparting limitations on other structural features. For example, in some embodiments discussed hereinafter, an aperture(s) of the plurality of apertures 400, 600, 800, 1000 may be angled. In such a case the cross-section taken across the angled aperture(s) may look different than a cross-section taken across a non-angled aperture(s). However, since FIG. 12 is merely schematic for the purpose of describing various features, FIG. 12 can be utilized to show aspects of both the angled and non-angledapertures without necessarily imparting a limitation that the angled aperture(s) may be equally the same as the non-angled aperture(s) when viewing the cross-sectional area shown in FIG. 12. Likewise, an aperture(s) of the plurality of apertures 400, 600, 800, 1000 may taper from the inner surface 339 of the sleeve 323 to the outer peripheral surface 337 of the sleeve 323 or from the outer peripheral surface 337 of the sleeve 323 to the inner surface 339 of the sleeve 323. Accordingly, FIG. 12 may be discussed with reference to both a tapering aperture(s) and a non-tapering aperture(s) despite FIG. 12 not specially showing the aperture as tapering, and thus should not impart any limitation as to specific shape of the aperture, unless otherwise specifically stated.

[0070] In aspects, the first plurality of apertures 401, 601, 801, 1001 can be equally circumferentially spaced in a first circular array 1201 (indicated by the curved arrow) about the rotational axis 307 of the cylindrical body 303. For example, as illustrated in FIG. 12, a distance 1203 between a first aperture 1205 and a second corresponding aperture 1207 in the first circular array 1201 can be substantially equal to a second distance 1209 between the first aperture 1205 and a corresponding third aperture 1211 in the first circular array 1201. This pattern can be repeated for all of the apertures in the first circular array 1201 such that each aperture in the first circular array 1201 is substantially equally circumferentially space apart between two corresponding apertures in the first circular array 1201. Alternatively, in some aspects not shown, the first plurality of apertures 401, 601, 801, 1001 can be non-uniformly circumferentially spaced in the first circular array 1201. For example, in some aspects, a circumferential distance between any circumferentially adjacent pair of apertures in the first circular array 1201 can be different from a circumferential distance of any other different circumferentially adjacent pair of apertures in the first circular array 1201. In further aspects not shown, some apertures of the first plurality of apertures 401, 601, 801, 1001 can be non-uniformly circumferentially spaced from one another in the first circular array 1201, while other apertures of the first plurality of apertures 401, 601, 801, 1001 can be substantially equally circumferentially spaced from one another in the first circular array 1201. For example, in some aspects, some circumferential distances between some circumferentially adjacent pairs of apertures in the first circular array 1201 can be different from one another, while some other circumferential distances between some other circumferentially adjacent pairs of apertures in the first circular array 1201 can be substantially equal to one another. Itshould be understood that the above examples for the spacing of the first plurality of apertures 401, 601, 801, 1001 in the first circular array 1201 are merely exemplary, and thus any other suitable spacing can be utilized.

[0071] Viewing FIGS. 5, 7, 9, and 11, in aspects, each aperture of the first plurality of apertures 401, 601, 801, 1001 can comprise a linear aperture defining a linear axis 501, 701, 901, 1101. It should be understood that FIGS. 5, 7, 9, and 11 show cross-sectional areas of FIGS. 4, 6, 8, and 10 respectively, and thus only half of sleeve 323 is shown, and thus there may be more apertures than are illustrated in FIGS. 5, 7, 9, and 11. Additionally, the cross-sectional areas shown in FIGS. 5, 7, 9, and 11 illustrate the hidden lines of each aperture of the plurality of apertures 400, 600, 800, 1000 to show various features of the apertures that would not otherwise be readily apparent. As shown in the embodiments in FIGS. 5 and 9, in aspects, the linear axis 501, 901 of each aperture of the first plurality of apertures 401, 801 can be perpendicular to the rotational axis 307. In this way, each aperture of the first plurality of apertures 401, 801 comprising the linear axis 501, 901 can extend a shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 501, such that the radial fluid path (shown generally at arrow 328) can also be substantially perpendicular to the rotational axis 307.

[0072] In some embodiments, as illustrated in FIGS. 7 and 11, the linear axis 701, 1101 can intersect the rotational axis 307 at an acute angle 703, 1103. More specifically, as shown in FIG. 7, in some aspects, the acute angle 703 of the first plurality of apertures 601 can face the inner surface 315 of the outer end wall 309. In this way, each aperture of the first plurality of apertures 601 with the linear axis 701 can extend greater than the shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 701, such that the radial fluid path (shown generally at arrow 328) can also be at an acute angle to the rotational axis 307 where the fluid will flow in a direction towards the inner surface 315 of the outer end wall 309.

[0073] Alternatively, in some aspects, as shown in FIG. 11, the acute angle 1103 of the first plurality of apertures 1001 can face away from the inner surface 315 of the outer end wall 309. In this way, each aperture of the first plurality of apertures1001 with the linear axis 1101 can extend greater than the shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 1101, such that the radial fluid path (shown generally at arrow 328) can also be at an acute angle to the rotational axis 307 where the fluid will flow in a direction away from the inner surface 315 of the outer end wall 309.

[0074] In aspects, the acute angle 703, 1103 can comprise an angle less than 90 degrees, such as for example, from about 80 degrees to about less than 90 degrees, or from about 70 degrees to 80 degrees, or from about 60 degrees to about 70 degrees, or from about 50 degrees to about 60 degrees, or from about 45 degrees to about 50 degrees, or from about 40 degrees to about 45 degrees, or from about 35 degrees to about 40 degrees, or from about 30 degrees to about 35 degrees, or from about 25 degrees to about 30 degrees, or from about 20 degrees to about 25 degrees, or from about 15 degrees to about 20 degrees, or from about 10 degrees to about 15 degrees, or from about 5 degrees to about 10 degrees, or about less than 5 degrees.

[0075] Referring generally back to FIGS. 4-9, 12, and 13. In aspects, the plurality of apertures 400, 600, 800 can further comprise a second plurality of apertures 407, 607, 807 that can each be spaced a second axial distance 409, 609, 809 from the inner surface 315 of the outer end wall 309. In aspects, the second axial distance 409, 609, 809 can be greater than the first axial distance 603. In some aspects, the second axial distance 409, 609, 809 can be measured by taking a shortest axial distance from the inner surface 315 of the outer end wall 309 to about a centroid of an opening of each aperture of the second plurality of apertures 407, 607, 807 on the outer peripheral surface 337 of the sleeve 323. For example, in some aspects, where the opening of an aperture of the second plurality of apertures 407, 607, 807 on the outer peripheral surface 337 of the sleeve 323 is circular, the centroid would be the point that is equidistant from all points around a circumference of the circular opening. As shown in FIGS. 4, 6, and 8, a dashed line 411, 611, 811 schematically illustrates a vertical line running substantially parallel with the inner surface 315 of the outer end wall 309 that would pass through the centroid of the second plurality of apertures 407, 607, 807. The shortest axial distance can be measured from the inner surface 315 of the outer end wall 309 to the vertical line. The second axial distance 409, 609, 809 can be any suitable distance from the inner surface 315 of the outer end wall 309, such as for example, but not limited to, an axial distance of from about 2. 1cm to about 2.7 cm. It should be understood from the above that the centroid, for purposes of measuring the second axial distance 409, 609, 809, can change with the shape of the opening of each aperture of the second plurality of apertures 407, 607, 807 on the outer peripheral surface 337 of the sleeve 323 and thus will need to be determined prior to measuring the second axial distance 409, 609, 809.

[0076] With additional reference to FIG. 13, a schematical cross-sectional area taken along line 13-13 of FIGS. 4, 6, and 8 illustrating the second plurality of apertures 407, 607, 807 is shown. It should be understood that FIG. 13 is provided for explanatory purposes to more clearly describe various features in accordance with the present disclosure. Accordingly, FIG. 13 should not be construed as imposing any unnecessary limitations on the structural aspects of the embodiments described herein. Thus, it should be understood that the actual structures may vary from the schematical representation shown in FIG. 13. More specifically, the cross-sectional area of some apertures may look different in certain aspects than actually illustrated in FIG. 13. However, FIG. 13 can be utilized schematically to illustrate similarities between these differing cross-sectional areas, without being construed as imparting limitations on other structural features. For example, in some embodiments discussed herein, an aperture(s) of the plurality of apertures 400, 600, 800 may be angled. In such a case the cross-section taken across the angled aperture(s) may look different than a crosssection taken across a non-angled aperture(s). However, since FIG. 13 is merely schematic for the purpose of describing various features, FIG. 13 can be utilized to show aspects of both the angled and non-angled apertures without necessarily imparting a limitation that the angled aperture(s) may be equally the same as the nonangled aperture(s) when viewing the cross-sectional area shown in FIG. 13. Likewise, an aperture(s) of the plurality of apertures 400, 600, 800 may taper from the inner surface 339 of the sleeve 323 to the outer peripheral surface 337 of the sleeve 323 or from the outer peripheral surface 337 of the sleeve 323 to the inner surface 339 of the sleeve 323. Accordingly, FIG. 13 may be discussed with reference to both a tapering aperture(s) and a non-tapering aperture(s) despite FIG. 13 not specially showing the aperture as tapering, and thus should not impart any limitation as to specific shape of the aperture, unless otherwise specifically stated.

[0077] In aspects, the second plurality of apertures 407, 607, 807 can be equally circumferentially spaced in a second circular array 1301 (indicated by the curved arrow) about the rotational axis 307 of the cylindrical body 303. For example,as illustrated in FIG. 13, a distance 1303 between a first aperture 1305 and a second corresponding aperture 1307 in the second circular array 1301 can be substantially equal to a second distance 1309 between the first aperture 1305 and a corresponding third aperture 1311 in the second circular array 1301. This pattern can be repeated for all of the apertures in the second circular array 1301 such that each aperture in the second circular array 1301 is substantially equally circumferentially space apart between two corresponding apertures in the second circular array 1301. Alternatively, in some aspects not shown, the second plurality of apertures 407, 607, 807 can be non-uniformly circumferentially spaced in the second circular array 1301. For example, in some aspects, a circumferential distance between any circumferentially adjacent pair of apertures in the second circular array 1301 can be different from a circumferential distance of any other different circumferentially adjacent pair of apertures in the second circular array 1301. In further aspects not shown, some apertures of the second plurality of apertures 407, 607, 807 can be non-uniformly circumferentially spaced from one another in the second circular array 1301, while other apertures of the second plurality of apertures 407, 607, 807 can be substantially equally circumferentially spaced from one another in the second circular array 1301. For example, in some aspects, some circumferential distances between some circumferentially adjacent pairs of apertures in the second circular array 1301 can be different from one another, while some other circumferential distances between some other circumferentially adjacent pairs of apertures in the second circular array 1301 can be substantially equal to one another. It should be understood that the above examples for the spacing of the second plurality of apertures 407, 607, 807 in the second circular array 1301 are merely exemplary, and thus any other suitable spacing can be utilized.

[0078] In some aspects, the second circular array 1301 can be circumferentially misaligned relative to the first circular array 1201 about the rotational axis 307 of the cylindrical body 303. For example, as shown in FIGS. 4, 6, and 8 the second circular array 1301 is offset from the first circular array 1201 such that none of the apertures in the second circular array 1301 align with any of the apertures in the first circular array 1201. Alternatively, in some embodiments not specifically shown, the second circular array 1301 can align with the first circular array 1201, such that each aperture in the second circular array 1301 is axially aligned with each aperture in the first circular array 1201. In some aspects, each aperture ofthe second circular array 1301 can be circumferentially positioned equally between a corresponding adjacent pair of apertures of the first circular array 1201. For example, a circumferential distance 413, 613, 813 (e.g., measured from the centroid of the opening of each aperture as described above) between one aperture in the second circular array 1301 and one aperture in the first circular array 1201 can be substantially equal to a circumferential distance 415, 615, 815 between the one aperture in the second circular array 1301 and another different aperture in the first circular array 1201. In aspects, this pattern can be repeated between each aperture in the second circular array 1301 and each pair of apertures in the first circular array 1201. For example, viewing FIG. 12 and 13 together can additionally show the second circular array 1301 circumferentially misaligned relative to the first circular array 1201 and being equally spaced. As shown, FIG. 12 illustrates the first circular array 1201 being offset (e.g., about 45 degrees) from the second circular array 1301 shown in FIG. 13. Any other suitable way of aligning the second circular array 1301 relative to the first circular array 1201 can be utilized.

[0079] Now viewing FIGS. 5, 7, and 9, in aspects, each aperture of the second plurality of apertures 407, 607, 807 can comprise a linear aperture defining a linear axis 505, 705, 905. As shown in the embodiment in FIGS. 5, 7, and 9, the linear axis 505, 705, 905 can be perpendicular to the rotational axis 307. In this way, each aperture of the second plurality of apertures 407, 607, 807 with the linear axis 505, 705, 905 can extend a shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 505, such that the radial fluid path (shown generally at arrow 328) can also be substantially perpendicular to the rotational axis 307.

[0080] In some embodiments (not shown) the linear axis 505, 705, 905 can intersect the rotational axis 307 at an acute angle (as described with reference to embodiments in the first circular array 1201). In some aspects, the acute angle can face the inner surface 315 of the outer end wall 309. In this way, each aperture of the second plurality of apertures 407, 607, 807 with the linear axis extending at the acute angle will extend greater than the shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis extending at the acute angle, such that the radial fluid path can also beat an acute angle to the rotational axis 307 where the fluid will flow in a direction towards the inner surface 315 of the outer end wall 309. Alternatively, in some aspects, not shown, the acute angle can face away from the inner surface 315 of the outer end wall 309. Accordingly, any fluid flowing within the passageway 325 can also be directed along the linear axis extending at the acute angle, such that the radial fluid path can also be at an acute angle to the rotational axis 307 where the fluid will flow in a direction away from the inner surface 315 of the outer end wall 309. In aspects, for example, the acute angle (not shown) can comprise any acute angle previously described with reference to the acute angle 703, 1103 in FIGS. 7 and 11 respectively.

[0081] In some aspects, as shown specifically in FIG. 5, a diameter 507 of each aperture of the second plurality of apertures 407 can be greater than a diameter 509 of each aperture of the first plurality of apertures 401. Alternately, in some aspects as shown in FIGS. 7 and 9, the diameter 707, 907 of each aperture of the second plurality of apertures 607, 807 can be equal to the diameter 709, 909 of each aperture of the first plurality of apertures 601, 801. Alternately, in some aspects not shown, a diameter of some apertures of the second plurality of apertures 407, 607, 807 can be equal to a diameter of some apertures of the first plurality of apertures 401, 601, 801 while a diameter of other apertures of the second plurality of apertures 407, 607, 807 can be different than a diameter of other apertures of the first plurality of apertures 401, 601, 801.

[0082] Again, with reference back to FIGS. 4-9, and 12, in aspects, the plurality of apertures 400, 600, 800 can further comprise a third plurality of apertures 417, 617, 817 that can each be spaced a third axial distance 419, 619, 819 from the inner surface 315 of the outer end wall 309. In aspects, the third axial distance 419, 619, 819 can be greater than the second axial distance 409, 609, 809. In some aspects, the third axial distance 419, 619, 819 can be measured by taking a shortest axial distance from the inner surface 315 of the outer end wall 309 to about a centroid of an opening of each aperture of the third plurality of apertures 417, 617, 817 on the outer peripheral surface 337 of the sleeve 323. For example, in some aspects, where the opening of an aperture of the third plurality of apertures 417, 617, 817 on the outer peripheral surface 337 of the sleeve 323 is circular, the centroid would be the point that is equidistant from all points around a circumference of the circular opening. As shown in FIGS. 4, 6, and 8, a dashed line 418, 618, 818 schematically illustrates avertical line running substantially parallel with the inner surface 315 of the outer end wall 309 that would pass through the centroid of the third plurality of apertures 417, 617, 817. The shortest axial distance can be measured from the inner surface 315 of the outer end wall 309 to the vertical line. The third axial distance 419, 619, 819 can be any suitable distance from the inner surface 315 of the outer end wall 309, such as for example, but not limited to, an axial distance of from about 2.8 cm to about 3.6 cm. It should be understood from the above that the centroid, for purposes of measuring the third axial distance 419, 619, 819, can change with the shape of the opening of each aperture of the third plurality of apertures 417, 617, 817 on the outer peripheral surface 337 of the sleeve 323 and thus will need to be determined prior to measuring the third axial distance 419, 619, 819.

[0083] With additional reference to FIG. 12, a schematical cross-sectional area taken along line 12-12 of FIG. 4, 6, and 8 of the third plurality of apertures 417, 617, 817 is shown. In aspects, the third plurality of apertures 417, 617, 817 can be equally circumferentially spaced in a third circular array 1213 (indicated by the curved arrow) about the rotational axis 307 of the cylindrical body 303. For example, as illustrated in FIG. 12, a distance 1203 between a first aperture 1205 and a second corresponding aperture 1207 in the third circular array 1213 can be substantially equal to a second distance 1209 between the first aperture 1205 and a corresponding third aperture 1211 in the third circular array 1213. This pattern can be repeated for all of the apertures in the third circular array 1213 such that each aperture in the third circular array 1213 is substantially equally circumferentially space apart between two corresponding apertures in the third circular array 1213. Alternatively, in some aspects not shown, the third plurality of apertures 417, 617, 817 can be non-uniformly circumferentially spaced in the third circular array 1213. For example, in some aspects, a circumferential distance between any circumferentially adjacent pair of apertures in the third circular array 1213 can be different from a circumferential distance of any other different circumferentially adjacent pair of apertures in the third circular array 1213. In further aspects not shown, some apertures of the third plurality of apertures 417, 617, 817 can be non-uniformly circumferentially spaced from one another in the third circular array 1213, while other apertures of the third plurality of apertures 417, 617, 817 can be substantially equally circumferentially spaced from one another in the third circular array 1213. For example, in some aspects, some circumferential distances between some circumferentially adjacent pairs of aperturesin the third circular array 1213 can be different from one another, while some other circumferential distances between some other circumferentially adjacent pairs of apertures in the third circular array 1213 can be substantially equal to one another. It should be understood that the above examples for the spacing of the third plurality of apertures 417, 617, 817 in the third circular array 1213 are merely exemplary, and thus any other suitable spacing can be utilized.

[0084] In some aspects, the third circular array 1213 can be circumferentially aligned relative to the first circular array 1201 about the rotational axis 307 of the cylindrical body 303. For example, as shown in FIGS. 5, 7, and 9, the third circular array 1213 can align with the first circular array 1201, such that each aperture in the third circular array 1213 is axially aligned with each aperture in the first circular array 1201. Alternatively, in some aspects not shown, the third circular array 1213 can be circumferentially aligned relative to the second circular array 1301 about the rotational axis 307 of the cylindrical body 303. For example (not shown), the third circular array 1213 can align with the second circular array 1301, such that each aperture in the third circular array 1213 is axially aligned with each aperture in the second circular array 1301. In other aspects (not shown), the third circular array 1213 can be circumferentially misaligned (similarly as described previously) relative to the first circular array 1201 about the rotational axis 307 of the cylindrical body 303 and the second circular array 1301 about the rotational axis 307 of the cylindrical body 303. Any other suitable way of aligning the third circular array 1213 can be utilized.

[0085] Viewing FIGS. 5, 7, and 9, in aspects, each aperture of the third plurality of apertures 417, 617, 817 can comprise a linear aperture defining a linear axis 511, 711, 911. As shown in the embodiment in FIGS. 5 and 9, the linear axis 511, 911 can be perpendicular to the rotational axis 307. In this way, each aperture of the third plurality of apertures 417, 817 with the linear axis 511, 911 can extend a shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 505, such that the radial fluid path (shown generally at arrow 328) can also be substantially perpendicular to the rotational axis 307.

[0086] In some embodiments, as illustrated in FIG. 7, the linear axis 711 of each aperture of the third plurality of apertures 617 can intersect the rotational axis 307 at an acute angle 713. More specifically, as shown in FIG. 7, the acute angle 713can face away from the inner surface 315 of the outer end wall 309. In this way, each aperture of the third plurality of apertures 617 with the linear axis 711 can extend greater than the shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 711, such that the radial fluid path (shown generally at arrow 328) can also be at an acute angle to the rotational axis 307 where the fluid will flow in a direction away from the inner surface 315 of the outer end wall 309. Alternatively in some aspects (not shown), the acute angle 713 of the third plurality of apertures 617 can face the inner surface 315 of the outer end wall 309 (e.g., similar to the first plurality of apertures 601 in FIG. 7). Accordingly, any fluid flowing within the passageway 325 can also be directed along the linear axis 711, such that the radial fluid path can also be at an acute angle to the rotational axis 307 where the fluid will flow in a direction towards the inner surface 315 of the outer end wall 309. In aspects, for example, the acute angle (not shown) can comprise any acute angle previously described with reference to the acute angle 703, 1103 in FIGS. 7 and 11 respectively.

[0087] In some aspects, as shown specifically in FIG. 5, a diameter 513 of each aperture of the third plurality of apertures 417 can be greater than the diameter 507 of each aperture of the second plurality of apertures 407. Alternately, in some aspects as shown in FIGS. 7 and 9, a diameter 715, 915 of each aperture of the third plurality of apertures 617, 817 can be equal to the diameter 707, 907 of each aperture of the second plurality of apertures 607, 807. Alternately, in some aspects not shown, a diameter of some apertures of the third plurality of apertures 417, 617, 817 can be equal to a diameter of some apertures of the second plurality of apertures 407, 607, 807, while a diameter of other apertures of the third plurality of apertures 417, 617, 817 can be different than a diameter of other apertures of the second plurality of apertures 407, 607, 807.

[0088] Referencing back to FIGS. 6-9, and 13, in aspects, the plurality of apertures 400, 600, 800 can further comprise a fourth plurality of apertures 621, 821 that are each spaced a fourth axial distance 623, 823 from the inner surface 315 of the outer end wall 309. In aspects, the fourth axial distance 623, 823 can be greater than the third axial distance 419, 619, 819. In some aspects, the fourth axial distance 623, 823 can be measured by taking a shortest axial distance from the inner surface 315 of the outer end wall 309 to about a centroid of an opening of each aperture of the fourthplurality of apertures 621, 821 on the outer peripheral surface 337 of the sleeve 323. For example, in some aspects, where the opening of an aperture of the fourth plurality of apertures 621, 821 on the outer peripheral surface 337 of the sleeve 323 is circular, the centroid would be the point that is equidistant from all points around a circumference of the circular opening. As shown in FIGS. 6 and 8, a dashed line 622, 822 schematically illustrates a vertical line running substantially parallel with the inner surface 315 of the outer end wall 309 that would pass through the centroid of the fourth plurality of apertures 621, 821. The shortest axial distance can be measured from the inner surface 315 of the outer end wall 309 to the vertical line. The fourth axial distance 623, 823 can be any suitable distance from the inner surface 315 of the outer end wall 309, such as for example, but not limited to, an axial distance of from about 3.5 cm to about 3.7 cm. It should be understood from the above that the centroid, for purposes of measuring the fourth axial distance 623, 823, can change with the shape of the opening of each aperture of the fourth plurality of apertures 621, 821 on the outer peripheral surface 337 of the sleeve 323 and thus will need to be determined prior to measuring the fourth axial distance 623, 823.

[0089] With additional reference to FIG. 13, a schematical cross-sectional area taken along line 13-13 of FIG. 6 illustrating the fourth plurality of apertures 621, 821 is shown. In aspects, the fourth plurality of apertures 621, 821 can be equally circumferentially spaced in a fourth circular array 1313 (indicated by the curved arrow) about the rotational axis 307 of the cylindrical body 303. For example, as illustrated in FIG. 13, a distance 1303 between a first aperture 1305 and a second corresponding aperture 1307 in the fourth circular array 1313 can be substantially equal to a second distance 1309 between the first aperture 1305 and a corresponding third aperture 1311 in the fourth circular array 1313. This pattern can be repeated for all of the apertures in the fourth circular array 1313 such that each aperture in the fourth circular array 1313 is substantially equally circumferentially space apart between two corresponding apertures in the fourth circular array 1313. Alternatively, in some aspects not shown, the fourth plurality of apertures 621, 821 can be non- uniformly circumferentially spaced in the fourth circular array 1313. For example, in some aspects, a circumferential distance between any circumferentially adjacent pair of apertures in the fourth circular array 1313 can be different from a circumferential distance of any other different circumferentially adjacent pair of apertures in the fourth circular array 1313. In further aspects not shown, some apertures of the fourthplurality of apertures 621, 821 can be non-uniformly circumferentially spaced from one another in the fourth circular array 1313, while other apertures of the fourth plurality of apertures 621, 821 can be substantially equally circumferentially spaced from one another in the fourth circular array 1313. For example, in some aspects, some circumferential distances between some circumferentially adjacent pairs of apertures in the fourth circular array 1313 can be different from one another, while some other circumferential distances between some other circumferentially adjacent pairs of apertures in the fourth circular array 1313 can be substantially equal to one another. It should be understood that the above examples for the spacing of the fourth plurality of apertures 621, 821 in the fourth circular array 1313 are merely exemplary, and thus any other suitable spacing can be utilized.

[0090] In some aspects, the fourth circular array 1313 can be circumferentially aligned relative to the second circular array 1301 about the rotational axis 307 of the cylindrical body 303. For example, as shown in FIGS. 7 and 9, the fourth circular array 1313 can align with the second circular array 1301, such that each aperture in the fourth circular array 1313 is axially aligned with each aperture in the second circular array 1301. Alternatively, in some aspects not shown, the fourth circular array 1313 can be circumferentially aligned relative to the third circular array 1213 about the rotational axis 307 of the cylindrical body 303. For example (not shown), the fourth circular array 1313 can align with the third circular array 1213, such that each aperture in the fourth circular array 1313 is axially aligned with each aperture in the third circular array 1213. In other aspects (not shown), the fourth circular array 1313 can be circumferentially misaligned (similarly as described previously) relative to the first circular array 1201 about the rotational axis 307 of the cylindrical body 303, the second circular array 1301 about the rotational axis 307 of the cylindrical body 303, and / or the third circular array 1213 about the rotational axis 307 of the cylindrical body 303. Any other suitable way of aligning the fourth circular array 1313 can be utilized.

[0091] Viewing FIGS. 7 and 9, in aspects, each aperture of the fourth plurality of apertures 621, 821 can comprise a linear aperture defining a linear axis 717, 917. In some embodiments, as illustrated in FIG. 7, the linear axis 717 of each aperture of the fourth plurality of apertures 621 can intersect the rotational axis 307 at an acute angle 719. More specifically, as shown in FIG. 7, the acute angle 719 can face away from the inner surface 315 of the outer end wall 309. In this way, eachaperture of the fourth plurality of apertures 621 with the linear axis 717 can extend greater than the shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 717, such that the radial fluid path (shown generally at arrow 328) can also be at an acute angle to the rotational axis 307 where the fluid can flow in a direction away from the inner surface 315 of the outer end wall 309. Alternatively in some aspects (not shown), the acute angle 719 of the fourth plurality of apertures 621, 821 can face the inner surface 315 of the outer end wall 309 (e.g., similar to the first plurality of apertures 601 in FIG. 7). Accordingly, any fluid flowing within the passageway 325 can also be directed along the linear axis 717, such that the radial fluid path can also be at an acute angle to the rotational axis 307 where the fluid can flow in a direction towards the inner surface 315 of the outer end wall 309. In aspects, for example, the acute angle 719 can comprise any acute angle previously described with reference to the acute angle 703, 1103 in FIGS. 7 and 11 respectively.

[0092] In some aspects, as shown in FIG. 9, the linear axis 917 of each aperture of the fourth plurality of apertures 821 can be perpendicular to the rotational axis 307. In this way, each aperture of the fourth plurality of apertures 821 can extend a shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 717, such that the radial fluid path can also be substantially perpendicular to the rotational axis 307.

[0093] In some aspects, as shown specifically in FIGS. 7 and 9, a diameter 721, 921 of each aperture of the fourth plurality of apertures 621, 821 can be equal to the diameter of each aperture of the third plurality of apertures 617, 817, the second plurality of apertures 607, 807, and / or the first plurality of apertures 601, 801. Alternatively, in some aspects (not shown), the diameter 721, 921 of each aperture of the fourth plurality of apertures 621, 821 can be greater than the diameter of each aperture of the third plurality of apertures 617, 817, the second plurality of apertures 607, 807, and / or the first plurality of apertures 601, 801. Alternately, in some aspects (not shown), a diameter of some apertures of the fourth plurality of apertures 621, 821 can be equal to a diameter of some apertures of the third plurality of apertures 617, 817, the second plurality of apertures 607, 807, and / or the first plurality of apertures 601, 801, while a diameter of other apertures of the fourth plurality of apertures 621,821 can be different than a diameter of other apertures of the third plurality of apertures 617, 817, the second plurality of apertures 607, 807, and / or the first plurality of apertures 601, 801.

[0094] Turning now more generally to any of the embodiments shown in FIGS. 4-13, in aspects, each aperture of the plurality of apertures 400, 600, 800, 1000 can comprise a circular aperture (as shown in FIGS. 4-13). However, this is not meant to be limiting, rather the plurality of apertures 400, 600, 800, 1000 can comprise any suitable shaped aperture(s), such as for example, square apertures, rectangular apertures, octagonal apertures, and / or the like. In some aspects, all of the apertures of the plurality of apertures 400, 600, 800, 1000 can be the same shape (e.g., all circular, all square, etc.). In some aspects, each aperture of the plurality of apertures 400, 600, 800, 1000 can be a different shape (e.g., all a different shape). In some aspects, some apertures of the plurality of apertures 400, 600, 800, 1000 can be the same shape while some apertures of the plurality of apertures 400, 600, 800, 1000 can be a different shape (e.g., some are circular while some are square). Any other suitable shape and / or combination of shapes can be utilized for the plurality of apertures 400, 600, 800, 1000.

[0095] In further aspects, while the plurality of apertures 400, 600, 800, 1000 have been described as having a first plurality of apertures 401, 601, 801, 1001, a second plurality of apertures 407, 607, 807, a third plurality of apertures 417, 617, 817, and / or a fourth plurality of apertures 621, 821, more than four plurality of apertures spaced in a circular array can be provided, such as for example, a fifth plurality of apertures spaced in a fifth circular array, and so on. It can be appreciated that by varying the number of plurality of apertures, an increased or decreased cooling effect can be achieved on the cylindrical wall 305 of the cylindrical body 303. Furthermore, in some aspects, while the first circular array 1201, the second circular array 1301, the third circular array 1213, and the fourth circular array 1313 have been illustrated herein as having four apertures within each array (e.g., for a total of twelve apertures in FIGS. 4-5, a total of sixteen apertures in FIGS. 6-9, and a total of four apertures in FIGS. 10-11) any other number of apertures can be provided, such as for example, more apertures (e.g., five apertures, six apertures, seven apertures, etc.) or less apertures (e.g., three apertures, two apertures, one aperture). In some examples, the first circular array 1201, the second circular array 1301, the third circular array 1213, and the fourth circular array 1313 can each have a different number ofapertures, or some can have the same number of apertures while others have a different number of apertures.

[0096] It can be appreciated that while specific embodiments of the sleeve 323 and of the plurality of apertures 400, 600, 800, 1000 have been disclosed with reference to FIGS. 4-13, each embodiment discussed above can be interchangeably and / or additionally utilized with one another. The following are some non-limiting examples to demonstrate this principle. In some examples, any aperture of the plurality of apertures 400, 600, 800, 1000 that was discussed with reference to the first plurality of apertures 401, 601, 801, 1001 can comprise any of the features (e.g., shape, size, pattern, etc.) discussed with reference to the second plurality of apertures 407, 607, 807, the third plurality of apertures 417, 617, 817, and / or the fourth plurality of apertures 621, 821. For example, where an aperture has been defined as comprising a linear axis that can be perpendicular to the rotational axis 307, in some embodiments, that same aperture can comprise a linear axis that intersect the rotational axis 307 at an acute angle. In some examples, such as in the embodiments shown in FIGS. 4-5, where the first plurality of apertures 401, 601, 801, 1001, the second plurality of apertures 407, 607, 807, and the third plurality of apertures 417, 617, 817 have been discussed as varying in size (e.g., diameter in the case of a circular aperture), in some examples, any of the embodiments disclosed herein can also vary in size (e.g., such as with an angled aperture). As should further be understood, the plurality of apertures 400, 600, 800, 1000 can comprise any suitable diameter. Furthermore, in some examples, where an aperture has been described as including an acute angle that faces towards the inner surface 315 of the outer end wall 309, in some aspects, the same acute angle can face away from the inner surface 315 of the outer end wall 309. It should be understood that these are merely exemplary combinations, and thus any other combination for the plurality of apertures 400, 600, 800, 1000 described herein can equally apply to any other embodiment without departing from the nature of the present disclosure.

[0097] Turning to FIGS. 14-17, additional embodiments of the sleeve 323 are illustrated. As shown, in aspects, the plurality of apertures 1400, 1700 can comprise a plurality of slots 1401, 1701. More specifically with reference to FIGS. 14-16, in aspects, the plurality of slots 1401 can comprise a plurality of elongated slots that are each elongated in a direction of the rotational axis 307. As best shown in FIG. 16, in some aspects, the plurality of slots 1401 can be equally circumferentially spaced in acircular array 1601 (indicated by the curved arrow) about the rotational axis 307 of the cylindrical body 303. For example, a distance 1603 between a first elongated slot 1605 and a second corresponding slot 1607 in the circular array 1601 can be substantially equal to a second distance 1609 between the first elongated slot 1605 and a corresponding third elongated slot 1611 in the circular array 1601. This pattern can be repeated for all of the elongated slots in the circular array 1601 such that each elongated slot in the circular array 1601 is substantially equally circumferentially space apart between two corresponding elongated slots in the circular array 1601. Alternatively, in some aspects (not shown), the plurality of slots 1401 can be non- uniformly circumferentially spaced in the circular array 1601. For example, in some aspects, a circumferential distance between any circumferentially adjacent pair of elongated slots in the circular array 1601 can be different from a circumferential distance of any other different circumferentially adjacent pair of elongated slots in the circular array 1601. In further aspects (not shown), some elongated slots of the plurality of slots 1401 can be non-uniformly circumferentially spaced from one another in the circular array 1601, while other apertures of the elongated slots can be substantially equally circumferentially spaced from one another in the circular array 1601. For example, in some aspects, some circumferential distances between some circumferentially adjacent pairs of elongated slots in the circular array 1601 can be different from one another, while some other circumferential distances between some other circumferentially adjacent pairs of elongated slots in the circular array 1601 can be substantially equal to one another. It should be understood that the above examples of the spacing of the plurality of slots 1401 in the circular array 1601 are merely exemplary in nature and are not intended to be limiting. Any other suitable spacing configurations can be employed without deviating from the scope of the present disclosure.

[0098] In some aspects, as shown in FIG. 15, each slot of the plurality of slots 1401 can comprise a linear slot comprising a linear axis 1501. In some aspects, as shown, the linear axis 1501 of each slot of the plurality of slots 1401 can be perpendicular to the rotational axis 307. In this way, each slot of the plurality of slots 1401 can extend a shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 1501, such that the radial fluid path can also be substantially perpendicular to the rotational axis 307.

[0099] In some embodiments (not shown), the linear axis 1501 of each slot of the plurality of slots 1401 can intersect the rotational axis 307 at an acute angle. More specifically, the acute angle can face away from the inner surface 315 of the outer end wall 309. In this way, each slot of the plurality of slots 1401 with the linear axis 1501 at the acute angle can extend greater than the shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the linear axis 1501, such that the radial fluid path (shown generally at arrow 328) can also be at an acute angle to the rotational axis 307 where the fluid can flow in a direction away from the inner surface 315 of the outer end wall 309. Alternatively in some aspects (not shown), the acute angle of the plurality of slots 1401 can face the inner surface 315 of the outer end wall 309 Accordingly, any fluid flowing within the passageway 325 can also be directed along the linear axis 1501, such that the radial fluid path can also be at an acute angle to the rotational axis 307 where the fluid can flow in a direction towards the inner surface 315 of the outer end wall 309. In aspects, for example, the acute angle can comprise any acute angle previously described with reference to the acute angle 703, 1103 in FIGS. 7 and 11 respectively.

[0100] In some aspects, the plurality of slots 1401 can comprise any suitable number of slots. For examples, as shown, the plurality of slots 1401 can comprise three slots. However, this is not meant to be limiting. In some examples, more than three slots may be in the circular array 1601, such as for example, four slots, five slots, six slots, and so on. Alternatively, in some examples, less than three slots can be in the circular array 1601, such as for example, two slots or one slot.

[0101] Viewing the embodiment of the sleeve 323 shown in FIGS. 17-20, in aspects, the plurality of slots 1701 can comprise a first pair of slots 1703 (see FIG. 19) that are each spaced a first axial distance 1705 (see FIG. 17) from the inner surface 315 of the outer end wall 309. In some aspects, the first axial distance 1705 can be measured by taking a shortest axial distance from the inner surface 315 of the outer end wall 309 to about a centroid of an opening of each slot of the first pair of slots 1703 on the outer peripheral surface 337 of the sleeve 323. As shown in FIG. 17, a dashed line 1704 schematically illustrates a vertical line running substantially parallel with the inner surface 315 of the outer end wall 309 that would pass through the centroid of the first pair of slots 1703. The shortest axial distance can be measured from the inner surface 315 of the outer end wall 309 to the vertical line. The first axialdistance 1705 can be any suitable distance from the inner surface 315 of the outer end wall 309, such as for example, but not limited to, an axial distance of from about 1.5 cm to about 1.7 cm. It should be understood from the above that the centroid, for purposes of measuring the first axial distance 1705 can change with the shape of the opening of each slot of the first pair of slots 1703 on the outer peripheral surface 337 of the sleeve 323 and thus will need to be determined prior to measuring the first axial distance 1705.

[0102] In aspects, the first pair of slots 1703 can be symmetrically disposed about a first symmetrical plane comprising the rotational axis 307. For example, viewing the three-dimensional axes in the lower left comer of FIG. 18, the first symmetrical plane can comprise a plane formed by the X and Y axis (e.g., the XY- Cartesian plane). In the orientation shown in FIG. 18, the first symmetrical plane can be parallel to the page. It should be understood that the three-dimensional axis representation illustrated herein is provided solely for descriptive and explanatory purposes and should not be constmed as limiting the scope of the present application. In practical implementations, the first symmetrical plane may be oriented in various configurations and alignments without departing from the fundamental teachings disclosed herein. In aspects, as illustrated, one slot can be disposed on each side of the first symmetrical plane. In some alternative aspects not shown, more than one slot can be disposed on each side of the first symmetrical plane, such as for example, a plurality of slots (e.g., two slots, three slots, etc.).

[0103] In further aspects, the plurality of slots 1701 can comprise a second pair of slots 1707 (see also FIG. 20) that are each spaced a second axial distance 1709 from the inner surface 315 of the outer end wall 309. In some aspects, the second axial distance 1709 can be greater than the first axial distance 1705. In some aspects, the second axial distance 1709 can be measured by taking a shortest axial distance from the inner surface 315 of the outer end wall 309 to about a centroid of an opening of each slot of the second pair of slots 1707 on the outer peripheral surface 337 of the sleeve 323. As shown in FIG. 17, a dashed line 1708 schematically illustrates a vertical line running substantially parallel with the inner surface 315 of the outer end wall 309 that would pass through the centroid of the second pair of slots 1707. The shortest axial distance can be measured from the inner surface 315 of the outer end wall 309 to the vertical line. The second axial distance 1709 can be any suitable distance from the inner surface 315 of the outer end wall 309, such as for example,but not limited to, an axial distance of from about 2.5 cm to about 2.7 cm. It should be understood from the above that the centroid, for purposes of measuring the second axial distance 1709 can change with the shape of the opening of each slot of the second pair of slots 1707 on the outer peripheral surface 337 of the sleeve 323.

[0104] In aspects, the second pair of slots 1707 can be symmetrically disposed about a second symmetrical plane comprising the rotational axis 307. In some aspects, the second symmetrical plane can be perpendicular to the first symmetrical plane. For example, viewing the three-dimensional axes in the lower left comer of FIG. 18, the second symmetrical plane can comprise a plane formed by the Z and Y axis (e.g., the ZY-Cartesian plane). In the orientation shown in FIG. 18, the second symmetrical plane can be perpendicular to the to the page (e.g., extending out and into the page with respect to FIG. 18). In aspects, as illustrated, one slot can be disposed on each side of the second symmetrical plane. In some alternative aspects not shown, more than one slot can be disposed on each side of the second symmetrical plane, such as for example, a plurality of slots (e.g., two slots, three slots, etc.).

[0105] In yet another aspect, the plurality of slots 1701 can comprise a third pair of slots 1715 that are each spaced a third axial distance 1717 from the inner surface 315 of the outer end wall 309. In aspects, the third axial distance 1717 can be greater than the second axial distance 1709. In some aspects, the third axial distance 1717 can be measured by taking a shortest axial distance from the inner surface 315 of the outer end wall 309 to about a centroid of an opening of each slot of the third pair of slots 1715 on the outer peripheral surface 337 of the sleeve 323. As shown in FIG. 17, a dashed line 1719 schematically illustrates a vertical line running substantially parallel with the inner surface 315 of the outer end wall 309 that would pass through the centroid of the third pair of slots 1715. The shortest axial distance can be measured from the inner surface 315 of the outer end wall 309 to the vertical line. The third axial distance 1717 can be any suitable distance from the inner surface 315 of the outer end wall 309, such as for example, but not limited to, an axial distance of from about 3.4 cm to about 3.8 cm. It should be understood from the above that the centroid, for purposes of measuring the third axial distance 1717 can change with the shape of the opening of each slot of the third pair of slots 1715 on the outer peripheral surface 337 of the sleeve 323.

[0106] In aspects, the third pair of slots 1715 can be symmetrically disposed about a third symmetrical plane comprising the rotational axis 307. In some aspects,the third symmetrical plane can be perpendicular to the second symmetrical plane. For example, viewing the three-dimensional axes in the lower left comer of FIG. 18, the third symmetrical plane can comprise a plane formed by the X and Y axis (e.g., the XY-Cartesian plane). In the orientation shown in FIG. 18, the third symmetrical plane can be parallel to the to the page. In aspects, as illustrated, one slot can be disposed on each side of the third symmetrical plane. In some alternative aspects not shown, more than one slot can be disposed on each side of the third symmetrical plane, such as for example, a plurality of slots (e.g., two slots, three slots, etc.).

[0107] In some aspects, as shown in FIG. 18, each slot of the first pair of slots 1701 can comprise a first slot width 1801 extending in a direction of the rotational axis 307. In aspects, the first slot width 1801 of each slot of the first pair of slots 1701 can be measured by a shortest distance taken across the maximum slot width. In further aspects, each slot of the second pair of slots 1707 can comprise a second slot width 1803 extending in the direction of the rotational axis 307. In aspects, the second slot width 1803 of each slot of the second pair of slots 1707 can be measured by a shortest distance taken across the maximum slot width. In some aspects, as shown, each slot of the third pair of slots 1715 can comprise a third slot width 1805 extending in the direction of the rotational axis 307. In aspects, the third slot width 1805 of each slot of the third pair of slots 1715 can be measured by a shortest distance taken across the maximum slot width. In aspects, the second slot width 1803 can be greater than the first slot width 1801. Furthermore, in some aspects, the third slot width 1805 can be greater than the second slot width, and the second slot width can be greater than the first slot width. Alternatively, in some aspects (not shown), the first slot width 1801, the second slot width 1803, and / or the third slot width 1805 can be less than, equal to, or greater than any other one of the first slot width 1801, the second slot width 1803, and / or the third slot width 1805.

[0108] In some aspects, each slot of the plurality of slots 1701, as shown in the schematical cross-sectional view in FIGS. 19 and 20, each slot of the plurality of slots 1701 can comprise an axis 1901. In some aspects, as shown, the axis 1901 of each slot of the plurality of slots 1701 can be perpendicular to the rotational axis 307. In this way, each slot of the plurality of slots 1701 can extend a shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can alsobe directed along the axis 1901, such that the radial fluid path can also be substantially perpendicular to the rotational axis 307.

[0109] In some embodiments (not shown), the axis 1901 of any one of the slots of the plurality of slots 1401 can intersect the rotational axis 307 at an acute angle. More specifically, the acute angle can face away from the inner surface 315 of the outer end wall 309. In this way, each slot of the plurality of slots 1701 with the axis 1901 at the acute angle can extend greater than the shortest distance between the outer peripheral surface 337 of the sleeve 323 and the inner surface 339 of the sleeve 323. Furthermore, any fluid flowing within the passageway 325 can also be directed along the axis 1901, such that the radial fluid path (shown generally at arrow 328, see FIG. 18) can also be at an acute angle to the rotational axis 307 where the fluid can flow in a direction away from the inner surface 315 of the outer end wall 309. Alternatively in some aspects (not shown), the acute angle of the plurality of slots 1701 can face the inner surface 315 of the outer end wall 309 Accordingly, any fluid flowing within the passageway 325 can also be directed along the axis 1901, such that the radial fluid path can also be at an acute angle to the rotational axis 307 where the fluid can flow in a direction towards the inner surface 315 of the outer end wall 309. In aspects, for example, the acute angle can comprise any acute angle previously described with reference to the acute angle 703, 1103 in FIGS. 7 and 11 respectively.

[0110] It can be appreciated (as described above with reference to FIGS. 4- 13) that anyone of the features associated with the plurality of slots 1401, 1701 can be utilized in addition to or interchangeably with one another. For example, in some aspects, the plurality of slots 1701 can additionally and / or interchangeably include the plurality of slots 1401 (e.g., such that the sleeve 323 comprises both vertical and horizontal slots). In further aspects, the plurality of slots 1401, 1701 can comprise any suitable shaped slots, such as for example square slots, rectangular slots, rounded slots, irregular shaped slots (e.g., having so fixed patter and / or border), and / or the like. It can also be appreciated that while FIGS. 14-20 show the plurality of apertures1400, 1700 as comprising only a plurality of slots 1401, 1701, in some aspects (not shown), the sleeve 323 can additionally, alternatively, and / or interchangeably comprise any one of the plurality of apertures 400, 600, 800, 1000 shown in FIGS. 4- 13. For example, in some aspects, the sleeve 323 can comprise the plurality of slots1401, 1701, and can also comprise any one or more of the first plurality of apertures 401, 601, 801, 1001, the second plurality of apertures 407, 607, 807, the thirdplurality of apertures 417, 617, 817, and / or the fourth plurality of apertures 621, 821. Additionally, the plurality of slots 1401, 1701 can comprise any suitable slot width and / or length.

[0111] As utilized herein, to measure any one of the axial distances described previously, the centroid of the opening of the apertures 400, 600, 800, 1000, 1400, 1700 on the outer peripheral surface 337 of the sleeve 323 can be determined utilizing any number of methods. In some examples, the centroid can be determined utilizing computer software. In other examples, the centroid can be determined by projecting a two-dimensional outline of the opening of the apertures 400, 600, 800, 1000, 1400, 1700 on a two-dimensional cartesian plane and utilizing known methods for finding the centroid of the given shape, such as for example, through integration methods or geometric decomposition.

[0112] FIGS. 21-24 will now be utilized to describe a method of manufacturing glass ribbon with the apparatus 101 with initial reference to FIGS. 1- 20 with the understanding that similar or identical methods may be provided in the other embodiments of the disclosure.

[0113] In aspects, as generally shown in FIGS. 1-2, the method can comprise flowing molten glass over the pair of downwardly inclined forming surface portions 207, 209 of the forming wedge 201. The method can then comprise drawing the molten glass from the root 213 of the forming wedge 201 to form the glass ribbon 103. As best shown in FIG. 2, in aspects, the method can comprise engaging the edge portion 146a, 146b of the glass ribbon 103 with the at least one edge roller 301. In further aspects, engaging the edge portion 146a, 146b of the glass ribbon 103 can further comprises engaging the edge portion 146a, 146b of the glass ribbon 103 with a pair of edge rollers (e.g., a first edge roller 301 and a second edge roller 301) positioned downstream from the root 213. In some aspects, engaging the edge portion 146a, 146b of the glass ribbon 103 with the at least one edge roller 301 or the pair of edge rollers can comprise simultaneously engaging the edge portion 146a and the edge portion 146b of the glass ribbon 103.

[0114] With additional reference to FIG. 3, in aspects, the method can comprise directing a fluid stream along the axial fluid path 322 of the fluid conduit 321 and into the passageway 325 of the sleeve 323. In aspects, the method can comprise directing the fluid stream along the radial fluid path (shown generally at arrow 328) from each aperture of the plurality of apertures 400, 600, 800, 1000, 1400,1700 to impact the inner cylindrical surface 313 of the cylindrical wall 305 to cool the cylindrical wall 305 of the cylindrical body 303. Likewise, the method can comprise directing a plurality of radial fluid streams (e.g., more than one stream of fluid) to impact the inner cylindrical surface within the chamber to cool each edge roller of the pair of edge rollers. In some aspects, the fluid stream can comprise a cooling fluid, such as for example, water, air, refrigerant (e.g., chlorofluorocarbons(CFCs), hydrofluorocarbons (HFCs) and / or the like), gas (e.g., nitrogen), and / or the like.

[0115] In aspects, the method can further comprise reducing heat exchange to the outer end wall 309 with the insulating material disposed within the chamber 317 and positioned between the sleeve 323 and the inner surface 315 of the outer end wall 309. In aspects as described above with reference to FIG. 3, the insulating material can comprise the insulating layer 341 (shown in FIG. 3) disposed on the inner surface 315 of the outer end wall 309. In aspects, the insulating layer can be disposed over substantially the entire inner surface 315 of the outer end wall 309. Furthermore, in aspects, the insulating layer 341 can comprise the cast insulating layer (see FIG. 3 description above).

[0116] In aspects, the method can comprise cooling the edge portion 146a, 146b of the glass ribbon 103 with the pair of edge rollers. In aspects, cooling the edge portion 146a, 146b of the glass ribbon 103 can comprise transferring heat from the edge portion 146a, 146b of the glass ribbon to the cooling fluid through the cylindrical wall 305. For example, as the at least one edge roller 301 and / or the pair of edge rollers engage the edge portion 146a, 146b of the glass ribbon 103, the cylindrical wall 305 will increase in temperature. Accordingly, the fluid stream (e.g., at a cooler temperature than the cylindrical wall 305) can impact the cylindrical wall 305 and transfer heat away from the cylindrical wall 305 to reduce the temperature on the edge portion 146a, 146b of the glass ribbon 103.

[0117] In aspects, as shown in FIGS. 21 and 22, the method can comprise maintaining a temperature gradient within a first temperature range 2101 (see FIG. 21) across a portion 2201 (see FIG. 22) of each edge roller 301 of the pair of edge rollers that engages the edge portion 146a, 146b of the glass ribbon 103. For example, FIG. 20 illustrates a graph where a vertical axis 2103 represents a temperature of the portion 2201 of each edge roller 301 in degrees centigrade (e.g., °C), while a horizontal axis 2105 represents a position L along a length of the portion 2201 of the edge roller 301, schematically shown in FIG. 21. In aspects, the position L on thehorizontal axis 2105 can correspond directly to a position L (e.g., one unit length on the graph equals one unit length along the edge roller 301) along a length of the portion 2201 of the edge roller 301 shown in FIG. 22. As shown, the portion 2201 can correspond to the cylindrical wall 305 of the cylindrical body 303, and more specifically, can correspond to the outer cylindrical knurled surface 319 of the cylindrical body 303. In the orientation shown in FIGS. 21 and 22, the left-hand side (shown generally at arrow 2107) of FIG. 21 can correspond to the left-hand side (shown generally at arrow 2203) of the portion 2201 of the edge roller 301 in FIG. 22. For example, the temperatures on the left-hand side (e.g., at the arrow 2107) of the graph in FIG. 21 can correspond to a temperature on the left-hand side (e.g., at the arrow 2203) of the portion 2201 of the edge roller 301. Accordingly, moving from left to right along the horizontal axis 2105 on the graph correspondingly moves from left to right along the length L of the portion 2201 of the edge roller 301. Therefore, the temperature on the right-hand side of the graph shown in FIG. 21 (shown generally at arrow 2109) will correspond to the temperature of the right-hand side of the portion 2201 of the edge roller 301 (shown generally at arrow 2205).

[0118] In aspects, as shown in FIG. 21, the first temperature range 2101 can be from about 500 °C to about 700 °C. More specifically, as indicated at line 2111, where the sleeve 323 comprises the plurality of apertures 600 (e.g., the first plurality of apertures 601, the second plurality of apertures 607, the third plurality of apertures 617, and the fourth plurality of apertures 621) as shown in FIGS. 6 and 7, the first temperature range 2101 can be from about 500 °C to about 600 °C. Similarly, in some aspects, as indicated at line 2119, where the sleeve 323 comprises the plurality of apertures 600 (e.g., the first plurality of apertures 601, the second plurality of apertures 607, the third plurality of apertures 617, and the fourth plurality of apertures 621) as shown in FIGS. 6 and 7 but with the layer of insulating layer 341 cut at the angle 345 (see FIG. 3), the first temperature range 2101 can be from about 500 °C to about 625 °C. In some aspects, as indicated at line 2113, where the sleeve 323 comprises the plurality of apertures 1400 (e.g., the plurality of slots 1401) as shown in FIGS. 14 and 15, the first temperature range 2101 can be from about 500 °C to about 610 °C. In some aspects, as indicated at line 2115, where the sleeve 323 comprises the plurality of apertures 800 (e.g., the first plurality of apertures 801, the second plurality of apertures 807, the third plurality of apertures 817, and the fourth plurality of apertures 821) as shown in FIGS. 8 and 9, the first temperature range 2101 can befrom about 500 °C to about 615 °C. Similarly, in some aspects, as indicated at line 2117, where the sleeve 323 comprises the plurality of apertures 800 (e.g., the first plurality of apertures 801, the second plurality of apertures 807, the third plurality of apertures 817, and the fourth plurality of apertures 821) as shown in FIGS. 8 and 9 but with varying the aperture sizes (e.g., smaller apertures), the first temperature range 2101 can be from about 500 °C to about 625 °C. In some aspects, as indicated at line 2121, where the sleeve 323 comprises the plurality of apertures 400 (e.g., the first plurality of apertures 401, the second plurality of apertures 407, and the third plurality of apertures 417) as shown in FIGS. 4 and 5, the first temperature range 2101 can be from about 500 °C to about 635 °C. In some aspects, as indicated at line 2123, where the sleeve 323 comprises the plurality of apertures 1700 (e.g., the plurality of slots 1701) as shown in FIGS. 17 and 18, the first temperature range 2101 can be from about 500 °C to about 655 °C. In some aspects, as indicated at line 2125, where the sleeve 323 comprises the plurality of apertures 1000 (e.g., the first plurality of apertures 1001) as shown in FIGS. 10 and 11, the first temperature range 2101 can be from about 500 °C to about 660 °C.

[0119] In aspects, as illustrated in FIGS. 23 and 24, the method can comprise maintaining a temperature gradient within a second temperature range 2301 across a free end 311 (see FIG. 24) of an end portion 2401 of each edge roller 301 of the pair of edge rollers that does not engage the glass ribbon 103. For example, FIG. 23 illustrates a graph where a vertical axis 2303 represents a temperature of the free end 311 of the end portion 2401 of each edge roller 301 in degrees centigrade (e.g., °C), while a horizontal axis 2305 represents a position R along a position of a radius R of the free end 311 of the end portion 2401 of each edge roller 301 , schematically shown in FIG. 24. It should be understood that FIG. 24 illustrates only half of the free end 311 of the end portion 2401 of each edge roller 301 because the temperature gradient across the other half (not shown) of the free end 311 will be substantially the same as the half of the free end 311 shown. Furthermore, FIG. 22 illustrates temperatures across the free end 311 of the end portion 2401 of the edge roller 301 measured from the center of the free end 311 to a radius of the free end 311. Thus, it should be understood that the temperature gradient shown from the center of the free end 311 to a point 2405 on an outer edge 2407 of the free end 311 will be substantially the same as the temperature gradient from the center of the free end 311 to any other point on the outer edge 2407 of the free end 311 , Accordingly, in aspects, the positionR on the horizontal axis 2305 can correspond directly to a position along the radius R (e.g., one unit length on the graph equals one unit length along the free end 311 of the end portion 2401 of the edge roller 301) of the free end 311 of the end portion 2401 of the edge roller 301, shown in FIG. 24. As shown, the free end 311 of the end portion 2401 can correspond to an outer surface of the outer end wall 309 of the cylindrical body 303 (see additionally FIG. 3). In the orientation shown in FIGS. 23 and 24, the left-hand side (shown generally at arrow 2307) of FIG. 23 can directly correspond to a center of the free end 311 of the end portion 2401 of the edge roller 301 (shown generally at arrow 2403) in FIG. 24. For example, the temperatures on the left-hand side (e.g., at the arrow 2307) of the graph in FIG. 23 can directly correspond to temperatures at the center (e.g., shown at the arrow 2403) of the free end 311 of the end portion 2401 of the edge roller 301. Accordingly, moving from left to right along the horizontal axis 2305 on the graph correspondingly moves from left to right along the radius R of the free end 311. Therefore, the temperature on the right-hand side of the graph shown in FIG. 23 (shown generally at arrow 2309) will correspond to the temperature of the point 2405 on the right-hand side of the free end 311.

[0120] In aspects, as shown in FIG. 23, the second temperature range 2301 can be from about 550°C to about 700 °C. More specifically, as indicated at line 2311, where the sleeve 323 comprises the plurality of apertures 600 (e.g., the first plurality of apertures 601, the second plurality of apertures 607, the third plurality of apertures 617, and the fourth plurality of apertures 621) as shown in FIGS. 6 and 7, the second temperature range 2301 can be from about 500 °C to about 615 °C. Similarly, in some aspects, as indicated at line 2319, where the sleeve 323 comprises the plurality of apertures 600 (e.g., the first plurality of apertures 601, the second plurality of apertures 607, the third plurality of apertures 617, and the fourth plurality of apertures 621) as shown in FIGS. 6 and 7 but with the layer of insulating layer 341 cut at the angle 345 (see FIG. 3), the second temperature range 2301 can be from about 615 °C to about 650 °C. In some aspects, as indicated at line 2313, where the sleeve 323 comprises the plurality of apertures 1400 (e.g., the plurality of slots 1401) as shown in FIGS. 14 and 15, the second temperature range 2301 can be from about 600 °C to about 640 °C. In some aspects, as indicated at line 2315, where the sleeve 323 comprises the plurality of apertures 800 (e.g., the first plurality of apertures 801, the second plurality of apertures 807, the third plurality of apertures 817, and the fourth plurality of apertures 821) as shown in FIGS. 8 and 9, the second temperature range2301 can be from about 605 °C to about 640 °C. Similarly, in some aspects, as indicated at line 2317, where the sleeve 323 comprises the plurality of apertures 800 (e.g., the first plurality of apertures 801, the second plurality of apertures 807, the third plurality of apertures 817, and the fourth plurality of apertures 821) as shown in FIGS. 8 and 9 but with varying the aperture sizes (e.g., smaller apertures), the second temperature range 2301 can be from about 615 °C to about 650 °C. In some aspects, as indicated at line 2321, where the sleeve 323 comprises the plurality of apertures 400 (e.g., the first plurality of apertures 401, the second plurality of apertures 407, and the third plurality of apertures 417) as shown in FIGS. 4 and 5, the second temperature range 2301 can be from about 620 °C to about 660 °C. In some aspects, as indicated at line 2323, where the sleeve 323 comprises the plurality of apertures 1700 (e.g., the plurality of slots 1701) as shown in FIGS. 17 and 18, the second temperature range 2301 can be from about 650 °C to about 685 °C. In some aspects, as indicated at line 2325, where the sleeve 323 comprises the plurality of apertures 1000 (e.g., the first plurality of apertures 1001) as shown in FIGS. 10 and 11, the second temperature range 2301 can be from about 650 °C to about 685 °C.

[0121] It can be appreciated that like reference numerals have been utilized in FIGS. 21 and 23 to refer to portions of each graph where the same embodiments produce the first temperature range 2101 and the second temperature range 2301 across their respective portions of the edge roller 301. For example, the line 2111 in FIG. 21 corresponds to the same embodiment as the line 2311 in FIG. 22. This is the case for all the lines on both graphs illustrated in FIGS. 21 and 23.

[0122] In some aspects, as should be apparent from above, an average temperature of the temperature gradient of the second temperature range 2301 can be greater than an average temperature of the temperature gradient of the first temperature range 2101. In some examples, the overall average temperature of the temperature gradient of the second temperature range 2301 for all the embodiment discussed above can be greater than the overall average temperature of the temperature gradient of the first temperature range 2101. In some examples, when viewing any specific embodiment, an average temperature of the temperature gradient of the second temperature range 2301 for that embodiment can be greater than an average temperature of the temperature gradient of the first temperature range 2101 of that embodiment. As one non-limiting example of this principle, viewing the line 2111 of FIG. 20 and line 2311 of FIG. 22 (e.g., corresponding embodiments) an averagetemperature of the temperature gradient of the second temperature range 2301 for this embodiment can be greater than an average temperature of the temperature gradient of the first temperature range 2101 of that embodiment. For example, taking an average temperature of the second temperature range 2301 (from the ranges described above for the line 2111) yields an average temperature of about 557.5 °C while taking an average temperature of the first temperature range 2101 (from the ranges described above for the line 2111) yields an average temperature of about 550 °C. Thus, on average the temperature of the second temperature range 2301 can be greater than the temperature of the first temperature range 2101.

[0123] In aspects, it can be appreciated that several benefits can be achieved by maintaining an average temperature of the temperature gradient of the second temperature range 2301 that is greater than an average temperature of the temperature gradient of the first temperature range 2101. First, by maintaining the above-described gradient differentials, the edge roller 301 will be able to be utilized with a wider range of glass, such as for example, glass with a lower viscosity. Providing an average temperature of the temperature gradient of the first temperature range 2101 (e.g., across the cylindrical wall 305) that is lower than the second temperature range 2301 (e.g., across the free end 311) will be beneficial in helping to pull the viscous glass in the downstream direction 211. Furthermore, simultaneously providing the second temperature range 2301 (e.g., on average) higher than the first temperature range 2101 can help to minimize or prevent boron condensation from building up on the free end 311 of the end portion 2401 of the edge roller 301. Preventing boron condensation can be crucial in glass manufacturing as it will yield undesirable results in the glass, such as for example, optical defects, chemical durability, phase separation and / or the like. Furthermore, preventing boron condensation can be useful for process stability by helping to reduce the need for quality assessment on the quality area of the glass. Furthermore, preventing boron condensation can be useful in reducing manufacturing costs associated with cleaning edger rolls as a result of boron condensation build up.

[0124] In some aspects, the method can further comprise insulating the inner surface 315 of the free end 311 of the end portion 2401 of each edge roller 301 to facilitate maintaining the temperature gradient within the second temperature range (e.g., by including the insulating layer 341 described above). In some aspects, insulating the inner surface 315 of the free end 311 of the end portion 2401 of eachedge roller 301 can comprise casting an insulator within the chamber 317 defined by each edge roller 301 of the pair of edge rollers.

[0125] In accordance with the disclosure, non-limiting aspects of the disclosure will now be described. Various combinations of the aspects can be provided in accordance with the disclosure.

[0126] Aspect 1. An apparatus for making a glass ribbon comprises a forming wedge. The forming wedge comprises a pair of downwardly inclined forming surface portions converging along a downstream direction to form a root. The apparatus further comprises at least one edge roller configured to contact an edge portion of the glass ribbon. The at least one edge roller comprises a cylindrical body. The cylindrical body comprises a cylindrical wall circumscribing a rotational axis of the cylindrical body, and an outer end wall attached to an outer end of the cylindrical wall. An inner cylindrical surface of the cylindrical wall and an inner surface of the outer end wall at least partially define a chamber of the cylindrical body. The at least one edge roller further comprises a shaft coupled to the cylindrical body and configured to rotate the cylindrical body about the rotational axis. The at least one edge roller still further comprises a sleeve coupled to an outer end of a fluid conduit. The sleeve comprises a plurality of apertures that each define a radial fluid path extending along an outer radial direction from a passageway of the sleeve toward the inner cylindrical surface of the cylindrical wall.

[0127] Aspect 2. The apparatus of aspect 1, wherein the at least one edge roller further comprises an insulating material disposed within the chamber and positioned between the sleeve and the inner surface of the outer end wall.

[0128] Aspect 3. The apparatus of aspect 2, wherein the insulating material comprises an insulating layer disposed on the inner surface of the outer end wall.

[0129] Aspect 4. The apparatus of aspect 3, wherein the insulating layer is disposed over substantially the entire inner surface of the outer end wall.

[0130] Aspect 5. The apparatus of any one of aspects 3-4, wherein the insulating layer comprises a cast insulating layer.

[0131] Aspect 6. The apparatus of any one of aspects 1-5, wherein the cylindrical body comprises an outer cylindrical knurled surface.

[0132] Aspect 7. The apparatus of any one of aspects 1-6, wherein the plurality of apertures further comprise a first plurality of apertures that are each spaced a first axial distance from the inner surface of the outer end wall.

[0133] Aspect 8. The apparatus of aspect 7, wherein the first plurality of apertures are equally circumferentially spaced in a first circular array about the rotational axis of the cylindrical body.

[0134] Aspect 9. The apparatus of any one of aspects 7-8, wherein each aperture of the first plurality of apertures comprises a linear aperture defining a linear axis.

[0135] Aspect 10. The apparatus of aspect 9, wherein the linear axis of each aperture of the first plurality of apertures is perpendicular to the rotational axis.

[0136] Aspect 11. The apparatus of aspect 9, wherein the linear axis of each aperture of the first plurality of apertures intersects the rotational axis at an acute angle.

[0137] Aspect 12. The apparatus of aspect 11, wherein the acute angle of each aperture of the first plurality of apertures faces the inner surface of the outer end wall.

[0138] Aspect 13. The apparatus of aspect 11, wherein the acute angle of each aperture of the first plurality of apertures faces away from the inner surface of the outer end wall.

[0139] Aspect 14. The apparatus of any one of aspects 7-13, wherein the plurality of apertures further comprise a second plurality of apertures that are each spaced a second axial distance from the inner surface of the outer end wall, wherein the second axial distance is greater than the first axial distance.

[0140] Aspect 15. The apparatus of aspect 14, wherein the second plurality of apertures are equally circumferentially spaced in a second circular array about the rotational axis of the cylindrical body.

[0141] Aspect 16. The apparatus of aspect 15, wherein the second circular array is circumferentially misaligned relative to the first circular array about the rotational axis of the cylindrical body.

[0142] Aspect 17. The apparatus of aspect 16, wherein each aperture of the second circular array is circumferentially positioned equally between a corresponding adjacent pair of apertures of the first circular array.

[0143] Aspect 18. The apparatus of any one of aspects 14-17, wherein each aperture of the second plurality of apertures comprises a linear aperture defining a linear axis.

[0144] Aspect 19. The apparatus of aspect 18, wherein the linear axis of each aperture of the second plurality of apertures is perpendicular to the rotational axis.

[0145] Aspect 20. The apparatus of any one of aspects 14-19, wherein a diameter of each aperture of the second plurality of apertures is greater than a diameter of each aperture of the first plurality of apertures.

[0146] Aspect 21. The apparatus of any one of aspects 14-20, wherein the plurality of apertures further comprise a third plurality of apertures that are each spaced a third axial distance from the inner surface of the outer end wall, wherein the third axial distance is greater than the second axial distance.

[0147] Aspect 22. The apparatus of aspect 21, wherein the third plurality of apertures are equally circumferentially spaced in a third circular array about the rotational axis of the cylindrical body.

[0148] Aspect 23. The apparatus of aspect 22, wherein the third circular array is circumferentially aligned relative to the first circular array about the rotational axis of the cylindrical body.

[0149] Aspect 24. The apparatus of any one of aspects 21-23, wherein each aperture of the third plurality of apertures comprises a linear aperture defining a linear axis.

[0150] Aspect 25. The apparatus of aspect 24, wherein the linear axis of each aperture of the third plurality of apertures is perpendicular to the rotational axis.

[0151] Aspect 26. The apparatus of aspect 24, wherein the linear axis of each aperture of the third plurality of apertures intersects the rotational axis at an acute angle.

[0152] Aspect 27. The apparatus of aspect 26, wherein the acute angle of each aperture of the third plurality of apertures faces away from the inner surface of the outer end wall.

[0153] Aspect 28. The apparatus of any one of aspects 21-27, wherein a diameter of each aperture of the third plurality of apertures is greater than a diameter of each aperture of the second plurality of apertures.

[0154] Aspect 29. The apparatus of any one of aspects 21-28, wherein the plurality of apertures further comprise a fourth plurality of apertures that are each spaced a fourth axial distance from the inner surface of the outer end wall, wherein the fourth axial distance is greater than the third axial distance.

[0155] Aspect 30. The apparatus of aspect 29, wherein the fourth plurality of apertures are equally circumferentially spaced in a fourth circular array about the rotational axis of the cylindrical body.

[0156] Aspect 31. The apparatus of aspect 30, wherein the fourth circular array is circumferentially aligned relative to the second circular array about the rotational axis of the cylindrical body.

[0157] Aspect 32. The apparatus of any one of aspects 29-31, wherein each aperture of the fourth plurality of apertures comprises a linear aperture defining a linear axis.

[0158] Aspect 33. The apparatus of aspect 32, wherein the linear axis of each aperture of the fourth plurality of apertures is perpendicular to the rotational axis.

[0159] Aspect 34. The apparatus of aspect 32, wherein the linear axis of each aperture of the fourth plurality of apertures intersects the rotational axis at an acute angle.

[0160] Aspect 35. The apparatus of aspect 34, wherein the acute angle of each aperture of the fourth plurality of apertures faces away from the inner surface of the outer end wall.

[0161] Aspect 36. The apparatus of any one of aspects 1-35, wherein each aperture of the plurality of apertures comprises a circular aperture.

[0162] Aspect 37. The apparatus of any one of aspects 1-6, wherein the plurality of apertures comprise a plurality of slots.

[0163] Aspect 38. The apparatus of aspect 37, wherein the plurality of slots comprise a first pair of slots that are each spaced a first axial distance from the inner surface of the outer end wall.

[0164] Aspect 39. The apparatus of aspect 38, wherein the first pair of slots are symmetrically disposed about a first symmetrical plane comprising the rotational axis.

[0165] Aspect 40. The apparatus of aspect 39, wherein the plurality of slots comprise a second pair of slots that are each spaced a second axial distance fromthe inner surface of the outer end wall, wherein the second axial distance is greater than the first axial distance.

[0166] Aspect 41. The apparatus of aspect 40, wherein the second pair of slots are symmetrically disposed about a second symmetrical plane comprising the rotational axis.

[0167] Aspect 42. The apparatus of 41, wherein the second symmetrical plane is perpendicular to the first symmetrical plane.

[0168] Aspect 43. The apparatus of any one of aspects 38-42, wherein each slot of the first pair of slots comprises a first slot width extending in a direction of the rotational axis, and each slot of the second pair of slots comprises a second slot width extending in the direction of the rotational axis, wherein the second slot width is greater than the first slot width.

[0169] Aspect 44. The apparatus of any one of aspects 41-42, wherein the plurality of slots comprise a third pair of slots that are each spaced a third axial distance from the inner surface of the outer end wall, wherein the third axial distance is greater than the second axial distance.

[0170] Aspect 45. The apparatus of aspect 44, wherein the third pair of slots are symmetrically disposed about a third symmetrical plane comprising the rotational axis.

[0171] Aspect 46. The apparatus of 45, wherein the third symmetrical plane is perpendicular to the second symmetrical plane.

[0172] Aspect 47. The apparatus of any one of aspects 44-46, wherein each slot of the first pair of slots comprises a first slot width extending in a direction of the rotational axis, a second pair of slots comprises a second slot width extending in the direction of the rotational axis, and each slot of the third pair of slots comprises a third slot width extending in the direction of the rotational axis, wherein the third slot width is greater than the second slot width, and the second slot width is greater than the first slot width.

[0173] Aspect 48. The apparatus of aspect 37, wherein the plurality of slots comprise a plurality of elongated slots that are each elongated in a direction of the rotational axis.

[0174] Aspect 49. The apparatus of aspect 48, wherein the plurality of slots are equally circumferentially spaced in a circular array about the rotational axis of the cylindrical body.

[0175] Aspect 50. The apparatus of any one of aspects 1-49, wherein the fluid conduit defines an axial fluid path extending toward the outer end wall of the cylindrical body, and the outer end of the fluid conduit extends within the chamber.

[0176] Aspect 51. A method of manufacturing glass ribbon with the apparatus of aspect 1 comprises flowing molten glass over the pair of downwardly inclined forming surface portions of the forming wedge. The method further comprises drawing the molten glass from the root of the forming wedge to form the glass ribbon. The method still further comprises engaging the edge portion of the glass ribbon with the at least one edge roller. The method still further comprises directing a fluid stream along the radial fluid path from each aperture of the plurality of apertures to impact the inner cylindrical surface of the cylindrical wall to cool the cylindrical wall of the cylindrical body.

[0177] Aspect 52. The method of aspect 51, further comprising reducing heat exchange to the outer end wall with an insulating material disposed within the chamber and positioned between the sleeve and the inner surface of the outer end wall.

[0178] Aspect 53. The method of aspect 52, wherein the insulating material comprises an insulating layer disposed on the inner surface of the outer end wall.

[0179]

[0180] Aspect 54. The method of aspect 53, wherein the insulating layer is disposed over substantially the entire inner surface of the outer end wall.

[0181] Aspect 55. The method of any one of aspects 53-54, wherein the insulating layer comprises a cast insulating layer.

[0182] Aspect 56. A method of manufacturing glass ribbon comprises flowing molten glass over a pair of downwardly inclined forming surface portions of a forming wedge. The method further comprises drawing the molten glass from a root of the forming wedge to form the glass ribbon. The method further comprises engaging an edge portion of the glass ribbon with a pair of edge rollers positioned downstream from the root. The method further comprises cooling the edge portion of the glass ribbon with the pair of edge rollers. The method further comprises maintaining a temperature gradient within a first temperature range across a portion of each edge roller of the pair of edge rollers that engages the edge portion of the glass ribbon. The method still further comprises maintaining a temperature gradient withina second temperature range across a free end of an end portion of each edge roller of the pair of edge rollers that does not engage the glass ribbon, wherein an average temperature of the temperature gradient of the second temperature range is greater than an average temperature of the temperature gradient of the first temperature range.

[0183] Aspect 57. The method of aspect 56, wherein the first temperature range is from about 500°C to about 700°C.

[0184] Aspect 58. The method of any one of aspects 56-57, wherein the second temperature range is from about 550°C to about 700°C.

[0185] Aspect 59. The method of any one of aspects 56-58, further comprising insulating an inner surface of the free end of the end portion of each edge roller to facilitate maintaining the temperature gradient within the second temperature range.

[0186] Aspect 60. The method of aspect 59, wherein insulating the inner surface of the free end of the end portion of each edge roller further comprises casting an insulator within a chamber defined by each edge roller of the pair of edge rollers.

[0187] Aspect 61. The method of any one of aspects 56-60, wherein each edge roller of the pair of edge rollers comprises an inner cylindrical surface circumscribing a chamber, and the method further comprises directing a plurality of radial fluid streams to impact the inner cylindrical surface within the chamber to cool each edge roller of the pair of edge rollers.

Claims

What is claimed is:

1. An apparatus for making a glass ribbon comprising: a forming wedge comprising a pair of downwardly inclined forming surface portions converging along a downstream direction to form a root; and at least one edge roller configured to contact an edge portion of the glass ribbon, the at least one edge roller comprising: a cylindrical body comprising a cylindrical wall circumscribing a rotational axis of the cylindrical body, and an outer end wall attached to an outer end of the cylindrical wall, wherein an inner cylindrical surface of the cylindrical wall and an inner surface of the outer end wall at least partially define a chamber of the cylindrical body; a shaft coupled to the cylindrical body and configured to rotate the cylindrical body about the rotational axis; a sleeve coupled to an outer end of a fluid conduit, the sleeve comprising a plurality of apertures that each define a radial fluid path extending along an outer radial direction from a passageway of the sleeve toward the inner cylindrical surface of the cylindrical wall.

2. The apparatus of claim 1, wherein the at least one edge roller further comprises an insulating material disposed within the chamber and positioned between the sleeve and the inner surface of the outer end wall.

3. The apparatus of claim 2, wherein the insulating material comprises an insulating layer disposed on the inner surface of the outer end wall.

4. The apparatus of claim 3, wherein the insulating layer is disposed over substantially the entire inner surface of the outer end wall.

5. The apparatus of any one of claims 3-4, wherein the insulating layer comprises a cast insulating layer.

6. The apparatus of any one of claims 1-5, wherein the cylindrical body comprises an outer cylindrical knurled surface.

7. The apparatus of any one of claims 1-6, wherein the plurality of apertures further comprise a first plurality of apertures that are each spaced a first axial distance from the inner surface of the outer end wall.

8. The apparatus of claim 7, wherein the first plurality of apertures are equally circumferentially spaced in a first circular array about the rotational axis of the cylindrical body.

9. The apparatus of any one of claims 7-8, wherein each aperture of the first plurality of apertures comprises a linear aperture defining a linear axis.

10. The apparatus of claim 9, wherein the linear axis of each aperture of the first plurality of apertures is perpendicular to the rotational axis.

11. The apparatus of claim 9, wherein the linear axis of each aperture of the first plurality of apertures intersects the rotational axis at an acute angle.

12. The apparatus of claim 11, wherein the acute angle of each aperture of the first plurality of apertures faces the inner surface of the outer end wall.

13. The apparatus of claim 11, wherein the acute angle of each aperture of the first plurality of apertures faces away from the inner surface of the outer end wall.

14. The apparatus of any one of claims 7-13, wherein the plurality of apertures further comprise a second plurality of apertures that are each spaced a second axial distance from the inner surface of the outer end wall, wherein the second axial distance is greater than the first axial distance.

15. The apparatus of claim 14, wherein the second plurality of apertures are equally circumferentially spaced in a second circular array about the rotational axis of the cylindrical body.

16. The apparatus of claim 15, wherein the second circular array is circumferentially misaligned relative to the first circular array about the rotational axis of the cylindrical body.

17. The apparatus of claim 16, wherein each aperture of the second circular array is circumferentially positioned equally between a corresponding adjacent pair of apertures of the first circular array.

18. The apparatus of any one of claims 14-17, wherein each aperture of the second plurality of apertures comprises a linear aperture defining a linear axis.

19. The apparatus of claim 18, wherein the linear axis of each aperture of the second plurality of apertures is perpendicular to the rotational axis.

20. The apparatus of any one of claims 14-19, wherein a diameter of each aperture of the second plurality of apertures is greater than a diameter of each aperture of the first plurality of apertures.

21. The apparatus of any one of claims 14-20, wherein the plurality of apertures further comprise a third plurality of apertures that are each spaced a third axial distance from the inner surface of the outer end wall, wherein the third axial distance is greater than the second axial distance.

22. The apparatus of claim 21, wherein the third plurality of apertures are equally circumferentially spaced in a third circular array about the rotational axis of the cylindrical body.

23. The apparatus of claim 22, wherein the third circular array is circumferentially aligned relative to the first circular array about the rotational axis of the cylindrical body.

24. The apparatus of any one of claims 21-23, wherein each aperture of the third plurality of apertures comprises a linear aperture defining a linear axis.

25. The apparatus of claim 24, wherein the linear axis of each aperture of the third plurality of apertures is perpendicular to the rotational axis.

26. The apparatus of claim 24, wherein the linear axis of each aperture of the third plurality of apertures intersects the rotational axis at an acute angle.

27. The apparatus of claim 26, wherein the acute angle of each aperture of the third plurality of apertures faces away from the inner surface of the outer end wall.

28. The apparatus of any one of claims 21-27, wherein a diameter of each aperture of the third plurality of apertures is greater than a diameter of each aperture of the second plurality of apertures.

29. The apparatus of any one of claims 21-28, wherein the plurality of apertures further comprise a fourth plurality of apertures that are each spaced a fourth axial distance from the inner surface of the outer end wall, wherein the fourth axial distance is greater than the third axial distance.

30. The apparatus of claim 29, wherein the fourth plurality of apertures are equally circumferentially spaced in a fourth circular array about the rotational axis of the cylindrical body.

31. The apparatus of claim 30, wherein the fourth circular array is circumferentially aligned relative to the second circular array about the rotational axis of the cylindrical body.

32. The apparatus of any one of claims 29-31, wherein each aperture of the fourth plurality of apertures comprises a linear aperture defining a linear axis.

33. The apparatus of claim 32, wherein the linear axis of each aperture of the fourth plurality of apertures is perpendicular to the rotational axis.

34. The apparatus of claim 32, wherein the linear axis of each aperture of the fourth plurality of apertures intersects the rotational axis at an acute angle.

35. The apparatus of claim 34, wherein the acute angle of each aperture of the fourth plurality of apertures faces away from the inner surface of the outer end wall.

36. The apparatus of any one of claims 1-35, wherein each aperture of the plurality of apertures comprises a circular aperture.

37. The apparatus of any one of claims 1-6, wherein the plurality of apertures comprise a plurality of slots.

38. The apparatus of claim 37, wherein the plurality of slots comprise a first pair of slots that are each spaced a first axial distance from the inner surface of the outer end wall.

39. The apparatus of claim 38, wherein the first pair of slots are symmetrically disposed about a first symmetrical plane comprising the rotational axis.

40. The apparatus of claim 39, wherein the plurality of slots comprise a second pair of slots that are each spaced a second axial distance from the inner surface of the outer end wall, wherein the second axial distance is greater than the first axial distance.

41. The apparatus of claim 40, wherein the second pair of slots are symmetrically disposed about a second symmetrical plane comprising the rotational axis.

42. The apparatus of 41, wherein the second symmetrical plane is perpendicular to the first symmetrical plane.

43. The apparatus of any one of claims 38-42, wherein each slot of the first pair of slots comprises a first slot width extending in a direction of the rotational axis, and each slot of the second pair of slots comprises a second slot width extending in the direction of the rotational axis, wherein the second slot width is greater than the first slot width.

44. The apparatus of any one of claims 41-42, wherein the plurality of slots comprise a third pair of slots that are each spaced a third axial distance from the inner surface of the outer end wall, wherein the third axial distance is greater than the second axial distance.

45. The apparatus of claim 44, wherein the third pair of slots are symmetrically disposed about a third symmetrical plane comprising the rotational axis.

46. The apparatus of 45, wherein the third symmetrical plane is perpendicular to the second symmetrical plane.

47. The apparatus of any one of claims 44-46, wherein each slot of the first pair of slots comprises a first slot width extending in a direction of the rotational axis, a second pair of slots comprises a second slot width extending in the direction of the rotational axis, and each slot of the third pair of slots comprises a third slot width extending in the direction of the rotational axis, wherein the third slot width is greater than the second slot width, and the second slot width is greater than the first slot width.

48. The apparatus of claim 37, wherein the plurality of slots comprise a plurality of elongated slots that are each elongated in a direction of the rotational axis.

49. The apparatus of claim 48, wherein the plurality of slots are equally circumferentially spaced in a circular array about the rotational axis of the cylindrical body.

50. The apparatus of any one of claims 1-49, wherein the fluid conduit defines an axial fluid path extending toward the outer end wall of the cylindrical body, and the outer end of the fluid conduit extends within the chamber.

51. A method of manufacturing glass ribbon with the apparatus of claim 1 comprising: flowing molten glass over the pair of downwardly inclined forming surface portions of the forming wedge;drawing the molten glass from the root of the forming wedge to form the glass ribbon; engaging the edge portion of the glass ribbon with the at least one edge roller; and directing a fluid stream along the radial fluid path from each aperture of the plurality of apertures to impact the inner cylindrical surface of the cylindrical wall to cool the cylindrical wall of the cylindrical body.

52. The method of claim 51, further comprising reducing heat exchange to the outer end wall with an insulating material disposed within the chamber and positioned between the sleeve and the inner surface of the outer end wall.

53. The method of claim 52, wherein the insulating material comprises an insulating layer disposed on the inner surface of the outer end wall.

54. The method of claim 53, wherein the insulating layer is disposed over substantially the entire inner surface of the outer end wall.

55. The method of any one of claims 53-54, wherein the insulating layer comprises a cast insulating layer.

56. A method of manufacturing glass ribbon compri sing : flowing molten glass over a pair of downwardly inclined forming surface portions of a forming wedge, drawing the molten glass from a root of the forming wedge to form the glass ribbon; engaging an edge portion of the glass ribbon with a pair of edge rollers positioned downstream from the root; cooling the edge portion of the glass ribbon with the pair of edge rollers; maintaining a temperature gradient within a first temperature range across a portion of each edge roller of the pair of edge rollers that engages the edge portion of the glass ribbon; and maintaining a temperature gradient within a second temperature range across a free end of an end portion of each edge roller of the pair of edge rollers that does notengage the glass ribbon, wherein an average temperature of the temperature gradient of the second temperature range is greater than an average temperature of the temperature gradient of the first temperature range.

57. The method of claim 56, wherein the first temperature range is from about 500°C to about 700°C.

58. The method of any one of claims 56-57, wherein the second temperature range is from about 550°C to about 700°C.

59. The method of any one of claims 56-58, further comprising insulating an inner surface of the free end of the end portion of each edge roller to facilitate maintaining the temperature gradient within the second temperature range.

60. The method of claim 59, wherein insulating the inner surface of the free end of the end portion of each edge roller further comprises casting an insulator within a chamber defined by each edge roller of the pair of edge rollers.

61. The method of any one of claims 56-60, wherein each edge roller of the pair of edge rollers comprises an inner cylindrical surface circumscribing a chamber, and the method further comprises directing a plurality of radial fluid streams to impact the inner cylindrical surface within the chamber to cool each edge roller of the pair of edge rollers.

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