Apparatus and method for edge treatment of sheet-like substrates - Patents.com

Abstract

To provide an alternative apparatus and a method for finishing an edge of a glass sheet by combining with a discharged cooling agent.SOLUTION: A finishing member is rotatably maintained in a chamber of a shroud. The shroud includes a wall part 52 terminated at a long edge for defining a part of a slot. The slot is structured so as to receive an end part of a sheet-like substrate, and facilitates a mutual action between the end part and the finishing member. The wall part 52 further defines nozzle passages 90a, 90b, 90c, 92a, 92b, 92c terminated at an opening of the long edge. Tubular members 80, 110a, 110b, 110c, 112a, 112b, 112c protrude from the long edges 60, 62, and define a passage which is in fluid communication with the nozzle passages 90a, 90b, 90c, 92a, 92b, 92c. A cooling agent discharged to the nozzle passages 90a, 90b, 90c, 92a, 92b, 92c is jetted to the finishing member through the tubular members even when a cross flow by vacuum exists.SELECTED DRAWING: Figure 3

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of priority to U.S. Provisional Application No. 62 / 427,293, filed November 29, 2016, the contents of which are relied upon and incorporated by reference in their entirety as if fully set forth below. This application is also a divisional application of Patent Application No. 2019-528645, filed on November 29, 2019. [Technical field]

[0002] FIELD OF THE DISCLOSURE This application relates generally to an apparatus and method for treating the edges of sheet-like substrates. More specifically, this application relates to the dispensing of a cooling fluid by an apparatus and method for grinding or polishing the edges of a substrate, such as the edge of a glass sheet. [Background technology]

[0003] Processing of glass sheets that require a high quality surface finish, such as those used in flat panel displays, typically involves cutting the glass sheet to a desired shape and then grinding and / or polishing the edges of the cut glass sheet to remove any sharp corners. The grinding or polishing step can be performed, for example, by a finishing device or machine that includes at least a finishing member, e.g., an abrasive wheel, such as a grinding wheel, a polishing wheel, or the like. With many such machines, the finishing member is driven, e.g., rotated, and the glass sheet is continuously conveyed so that the edge to be finished is brought into contact with the driven finishing member. The edge is machined at the point of contact. Some finishing devices use a finishing member that simultaneously machines both corners of the edge, such as a grinding or polishing wheel with grooves on its periphery.

[0004] The high processing speeds and materials involved generate excess heat at the interface between the glass sheet and the finishing member. Thus, many glass edge finishing machines incorporate cooling systems and are generally designed to direct a flow of coolant toward the area of ​​contact between the glass sheet and the finishing member. The coolant is often a liquid, e.g., water, that is sprayed or jetted toward the area of ​​the interface between the glass sheet and the finishing member.

[0005] In addition to providing the necessary cooling of the finishing member and the glass sheet, the discharged coolant advantageously serves to wash away particles, such as glass chips, generated during the edge finishing process. It is desirable to recover as much of the particulate-laden coolant as possible to prevent contamination of the surrounding environment and to reuse the coolant after the particles have been removed. Thus, many glass edge finishing machines place the finishing member in a shroud or housing. A vacuum source is in fluid communication with the interior of the shroud to actively remove the particulate-laden coolant. For reference, shrouds are conventionally configured to provide a wall or other enclosure function in close proximity to the anticipated interface between the glass sheet and the finishing member. Thus, the coolant supply lines are typically formed inside the shroud structure itself, terminating in an exit orifice or nozzle in the shroud wall and generally directed toward the anticipated interface between the glass sheet and the finishing member. At normal operating pressures, the coolant exits the orifice or nozzle of the shroud as a jet. While widely accepted, the use of a shroud and vacuum can prevent optimal coolant discharge. The shroud provides an exit orifice that is effectively fixed to the finishing member through a gap and is relatively close to the interface between the glass sheet and the finishing member, but the exit orifice does not provide any jet direction. Also, the high velocity cross flow of air caused by the vacuum can disrupt and misdirect the coolant jet through the drag forces it exerts. Summary of the Invention [Problem to be solved by the invention]

[0006] Accordingly, this application discloses an alternative apparatus and method for finishing the edges of glass sheets in combination with a dispensed coolant. [Means for solving the problem]

[0007] Some embodiments of the present disclosure relate to an apparatus for treating edges of glass sheets. The apparatus includes a finishing member, a shroud, and a tubular member. The finishing member is configured to treat edges of glass sheets and is rotatably held within a chamber of the shroud. The shroud includes a first wall terminating at a first long edge and a second wall terminating at a second long edge. The long edges are opposed to one another and collectively define at least a portion of a slot opening into the chamber. The slot is configured to slidably receive an edge of a glass sheet and facilitate interaction of the edge with the finishing member. The first wall further defines a nozzle passage for discharging a fluid. The nozzle passage terminates at an opening in the first long edge. Finally, the tubular member defines a passage protruding from the first long edge and in fluid communication with the nozzle passage. This configuration allows cooling liquid discharged into the nozzle passage to be precisely sprayed through the tubular member onto the finishing member even in the presence of a cross flow caused by a vacuum. In some embodiments, the tubular member terminates at a dispensing end opposite the first long edge. In some embodiments, the distance between the finishing member and the dispensing end is less than the distance between the finishing member and the first long edge. In other embodiments, the spatial location of the tubular member relative to the first long edge is adjustable. In still other embodiments, one or more additional nozzle passages are defined in one or both of the walls, with one or more additional tubular members associated with each of the additional nozzle passages.

[0008] Yet another embodiment of the present disclosure relates to an apparatus for treating an edge of a glass sheet. The apparatus includes a finishing member, a shroud, and a tubular member. The finishing member is configured to treat an edge of a glass sheet and is rotatably held within a chamber of the shroud. The shroud includes a wall terminating at a long edge defining at least a portion of a slot opening into the chamber. The slot is configured to slidably receive an edge of a glass sheet and facilitate interaction of the edge with the finishing member. The wall further defines a nozzle passage for discharging a fluid. The nozzle passage terminates at an opening in the long edge. The tubular member is removably assembled to the wall and protrudes from the long edge. The tubular member defines a passage in fluid communication with the nozzle passage. In some embodiments, the tubular member is removably assembled to the wall by a threaded or press-fit contact surface.

[0009] Yet another embodiment of the present disclosure relates to a method for treating an edge of a glass sheet. The method includes directing the edge of the glass sheet through a slot of a shroud of a processing device into a chamber of the shroud. The slot is at least partially defined by a long edge of a wall of the shroud. The edge of the glass sheet is treated by a finishing member disposed in the chamber. During the treating step, a flow of cooling liquid is directed to an interface between the edge of the glass sheet and the finishing member via a tubular member protruding from the long edge. In this regard, the tubular member defines a central passage in fluid communication with a nozzle passage defined in the wall. With the method of the present disclosure, the tubular member consistently and beneficially directs the cooling liquid to the interface. In some embodiments, the method of the present disclosure further includes adjusting the position of the tubular member relative to the long edge and therefore relative to the finishing member, for example to address wear of the finishing member.

[0010] Additional features and advantages will be set forth in the following detailed description, and in part will be immediately apparent to those skilled in the art from that description, or will be learned by practicing the embodiments described herein, including the following detailed description, the claims, and the accompanying drawings.

[0011] It should be understood that both the foregoing general description and the following detailed description describe various embodiments and are intended to provide an overview or framework for understanding the nature and character of the claimed subject matter. The accompanying drawings are included to provide a further understanding of the various embodiments, and are incorporated in and constitute a part of this specification. The drawings illustrate various embodiments described herein and, together with the description, serve to explain the principles and operation of the claimed subject matter. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view of an edge treatment device according to the principles of the present disclosure; FIG. [Diagram 2] FIG. 2 is a simplified cross-sectional view of a portion of the apparatus of FIG. 1. [Diagram 3] 2 is an enlarged perspective view of a portion of the apparatus of FIG. 1, including a shroud wall and a tubular member. [Figure 4A] FIG. 4 is an enlarged perspective view of the shroud wall portion of FIG. 3. [Figure 4B] FIG. 4 is a top view of a portion of the device of FIG. 1 with the tubular member of FIG. 3 removed. [Diagram 5] FIG. 4 is an enlarged and simplified cross-sectional view of the wall and tubular member of FIG. 3. [Figure 6] FIG. 6 is an enlarged and simplified cross-sectional view of an alternative tubular member according to the principles of the present disclosure assembled to the wall of FIG. 5; [Figure 7] FIG. 2 is a simplified top view of a portion of the apparatus of FIG. 1. [Figure 8A] 2 is an enlarged and simplified cross-sectional view of a portion of the device of FIG. 1 showing the coolant discharge flow pattern without the tubular member. [Figure 8B]2 is an enlarged and simplified cross-sectional view of a portion of the apparatus of FIG. 1 showing the coolant discharge flow pattern with a tubular member. [Figure 9A] 1 is an enlarged and simplified cross-sectional view, partially shown in block form, of another edge treatment device according to the principles of the present disclosure; [Figure 9B] 9B is an enlarged and simplified cross-sectional view of the device of FIG. 9A showing an alternative arrangement of tubular member components of the device that differs from the arrangement of FIG. 9A. [Figure 9C] FIG. 9B is an enlarged and simplified cross-sectional view of the device of FIG. 9A showing another alternative arrangement of the tubular member components that differs from the arrangement of FIGS. 9A and 9B. [Figure 10] 2 is a simplified top view of a portion of a glass edge handling system including the apparatus of FIG. 1 during processing of a glass sheet. [Figure 11] 11 is an enlarged and simplified cross-sectional view of a portion of the system of FIG. 10 including the edge of a glass sheet being processed by the apparatus. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Reference will now be made in detail to various embodiments of apparatus and methods for treating the edge of a sheet-like substrate, such as the edge of a glass sheet. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like parts.

[0014] One embodiment of an apparatus 10 according to the principles of the present disclosure for treating the edges of a glass sheet is shown in Figure 1. Although the apparatus 10 is described herein as being used to grind or polish the edges of a glass sheet, it should be understood that the apparatus 10, and other embodiments of the apparatus of the present disclosure, can also be used to treat other types of materials, such as polymers, e.g., Plexi-glass™, metals, or other sheet-like substrates. Thus, the apparatus 10 of the present disclosure should not be construed in a limiting sense.

[0015] The apparatus 10 includes a finishing member 12 and a shroud 14. For reference, a portion of the shroud 14 is depicted in FIG. 1 as being partially transparent to illustrate components such as the finishing member 12 disposed within the shroud 14. Broadly speaking, the finishing member 12 is rotatably supported within a generally referenced chamber 16 defined by the shroud 14 and configured to process, e.g., grind or polish, the edges of the glass sheets. As will also be described in more detail below, the apparatus 10 incorporates a coolant discharge system including one or more tubular members, not shown, for discharging coolant onto or toward a surface of the finishing member 12. In this regard, the apparatus 10 may include one or more inlet ports 18 that may be in fluid communication with a source of pressurized coolant.

[0016] The finishing member 12 can take a variety of forms and in some embodiments is an abrasive wheel, e.g., grinding wheel, polishing wheel, etc., of a type known to those skilled in the art to be suitable for mechanically finishing the edges of glass sheets. As a non-limiting example, the finishing member 12 can be a bonded wheel having embedded or carrying abrasive particles or abrasive media. In some embodiments, the finishing member 12 can form one or more grooves of a desired cross-section in its periphery. The finishing member 12 can be driven, e.g., rotated, by a motor 20, which is attached to or supported relative to the shroud 14.

[0017] The shroud 14 can take a variety of forms and in some embodiments can include a cover 30 and a base 32 that collectively define the chamber 16. In any of these configurations, the cover 30 can be pivotally attached to the base 32, such as by a hinge 34, to selectively open the chamber 16; for example, FIG. 1 shows the cover 30 in a closed position relative to the base 32, and the cover 30 can be selectively pivoted away from the base 32 when it is desired to open the chamber 16. In some embodiments, the shroud 14 can be defined by three or more pieces, and in other embodiments, the shroud 14 can have a homogenous or unitary construction. In any case, the shroud 14 can further include or be provided with an exhaust duct 36 that in some embodiments defines a generally referenced exhaust passage 38. The exhaust passage 38 is in fluid communication with the chamber 16. Additionally, exhaust duct 36 is configured to be fluidly connected to a vacuum source (not shown) such that operation of the vacuum source creates a negative pressure or vacuum within chamber 16 via exhaust passage 38. Alternatively, shroud 14 may incorporate other structures or features for exhausting fluid from chamber 16.

[0018] Regardless of the exact configuration, and as shown in Figure 1, the shape or footprint of the shroud 14 may mimic the peripheral shape of the finishing member 12, at least in the XY plane as defined by the X, Y, Z coordinate system specified in Figure 1. Thus, in some embodiments, the shroud 14 has a generally circular shape in the XY plane that corresponds relatively closely to the circular finishing member 12. Other shapes are contemplated.

[0019] As shown in the highly simplified cross-sectional view of Figure 2, the shroud 14 defines a slot 40 that opens into the chamber 16. For ease of understanding, the approximate location of the slot 40 is also identified in Figure 1. The slot 40 is generally configured, e.g., sized and shaped, to slidably receive an edge of a glass sheet, not shown, so that the edge can enter the chamber 16 and interact with the finishing member 12. Also generally shown in Figure 2 is an exhaust passage 38.

[0020] The slot 40 may be defined by the shroud 14 in a variety of ways. In some embodiments, the shroud 14 may be considered to include or define first and second walls 50, 52 that together form at least a portion of the perimeter of the slot 40. The first and second walls 50, 52 may be provided in different configurations, for example, the first wall 50 may be part of or attached to the cover 30 (FIG. 1) and the second wall 52 may be part of or attached to the base 32 (FIG. 1). In other embodiments, the first and second walls 50, 52 may be integrally formed as part of a single homogenous structure. In any case, the first wall 50 terminates at a first long edge 60. The second wall 52 terminates at a second long edge 62. The walls 50, 52 are arranged such that the first long edge 60 faces and is spaced apart from the second long edge 62, with the first and second long edges 60, 62 each defining at least a portion of the perimeter of the slot 40. In some embodiments, one or both of the long edges 60, 62 may include a chamfer in the YZ plane relative to the remainder of the corresponding wall 50, 52 (see, e.g., FIG. 3). For example, the first wall 50 may be considered to define an outer surface 70 and an inner surface 72. The first long edge 60 represents a transition edge adjacent the outer surface 70 and the inner surface 72, forming a non-perpendicular angle with both of the surfaces 70, 72. With respect to the central plane P of the slot 40, any chamfer arrangement may be described as the first long edge 60 being non-perpendicular and non-parallel to the central plane P. Alternatively, or in addition, any chamfer arrangement may be described as a first long edge 60 that projects away from the central plane P while extending from an outer surface 70 to an inner surface 72. A second long edge 62 may have a similar or identical chamfer configuration extending between corresponding outer and inner surfaces of the second wall portion 52. Finally, for reasons that will become apparent below, the device 10 may be provided with one or more tubular members 80, generally referenced, that project from one or both of the first and second long edges 60, 62.

[0021] The shroud walls 50, 52, along with the tubular member 80, are shown in more detail in FIG. 3, separated from the remainder of the shroud 14. One or both of the walls 50, 52 define at least one nozzle passage. For example, in the non-limiting embodiment of FIG. 3, the first wall 50 defines a first nozzle passage 90a, a second nozzle passage 90b, and a third nozzle passage 90c, respectively, and the second wall 52 defines a first nozzle passage 92a, a second nozzle passage 92b, and a third nozzle passage 92c, respectively. Any other number of nozzle passages is equally acceptable, more or less than three, e.g., the first wall 50 may have one or more nozzle passages and the second wall 50 may exclude any nozzle passages, or vice versa. That is, the present disclosure is not limited to three nozzle passages for each wall 50, 52. Regardless of the exact number provided, each of the nozzle passages 90a-90c, 92a-92c is configured to transport or eject a fluid, e.g., a coolant or liquid, and each may terminate in an opening in the long edge 60, 62 of the corresponding wall 50, 52. For example, with further reference to FIG. 4A, which otherwise shows the walls 50, 52 in isolation with the tubular member 80 removed, the first nozzle passage 90a in the first wall 50 terminates in a first opening 100a in the first long edge 60. The first opening 100a functions as a nozzle-like orifice through which the pressurized fluid exits the passage 90a. The plane or shape of the first opening 100a corresponds to the plane or shape of the first long edge 60, e.g., the first opening 100a follows or mimics any chamfer arrangement of the first long edge 60. In other words, the first long edge 60 can be a continuous, relatively smooth or flat surface, and the first opening 100a is formed in this continuous, relatively smooth or flat surface. However, it will be appreciated that due to the optionally curved shape of the first wall 50, i.e., as discussed above with respect to FIG. 1, the shroud 14 can mimic the curvature of the periphery of the finishing member 12, and the first wall 50 optionally incorporates this same curvature, the first long edge 60 is also curved in the XY plane.

[0022] The second and third nozzle passages 90b, 90c of the first wall 50 may be substantially identical to the first nozzle passage 90a as described above, with the second nozzle passage 90b terminating in a second opening 100b in the first long edge 60 and the third nozzle passage 90c terminating in a third opening 100c in the first long edge 60. The nozzle passages 90a-90c of the first wall 50 are spaced apart from one another. Depending on the optionally curved shape of the first long edge 60 in the XY plane, the openings 100a-100c may be radially offset from one another along the curvature of the first long edge 60 in the XY plane such that the centerlines CL1-CL3 of the respective openings 100a-100c, and thus the spray directions provided by each of the openings 100a-100c, generally intersect in some embodiments at the center of the finishing member 12 as depicted in FIG. 4B, which otherwise shows a portion of the apparatus 10 with the tubular member 80 (FIG. 3) removed.

[0023] 3 and 4A, the nozzle passages 92a-92c of the second wall 52 can be similar or identical to the nozzle passages 90a-90c of the first wall 50 as described above. Thus, the first nozzle passage 92a can terminate at a first opening 102a in the second long edge 62, the second nozzle passage 92b can terminate at a second opening 102b in the second long edge 62, and the third nozzle passage 92c can terminate at a third opening 102c in the second long edge 62. The walls 50, 52 can be arranged such that upon final assembly, each of the openings 100a-100c of the first wall is generally aligned in the Z direction with each of the openings 102a-102c of the second wall, e.g., the first opening 100a of the first wall 50 is aligned in the Z direction with the first opening 102a of the second wall 52, etc. In other embodiments, the nozzle passages 90a to 90c, 92a to 92c and / or the openings 100a to 100c, 102a to 102c in the first and second walls 50, 52 may differ from one another in terms of shape and / or location.

[0024] With particular reference to Figure 3, each of the tubular members 80 functions as an extension of a corresponding nozzle passageway, as described in more detail below. The material and dimensions of each of the tubular members 80 are selected to maintain a selected or desired spatial orientation under expected operating conditions, such that the tubular members 80 can have a structurally robust configuration, e.g., the tubular members 80 are formed and assembled to the shroud 14 (Figure 1) such that they do not flex excessively when subjected to drag forces associated with cross-flow due to vacuum. For example, the tubular members 80 can be formed from plastic, metal, e.g., brass, hardened rubber, etc.

[0025] In some embodiments, one tubular member is provided for each nozzle passage opening associated with the shroud 14 (FIG. 1). Thus, for example, the first tubular member 110a, the second tubular member 110b, and the third tubular member 110c can each be associated with a corresponding one of the nozzle passage openings 90a-90c in the first wall 50, and the first tubular member 112a, the second tubular member 112b, and the third tubular member 112c can each be associated with a corresponding one of the nozzle passage openings 92a-92c in the second wall 52. In other embodiments, one tubular member may be provided for some, but not all, of the available nozzle passage openings. In still other embodiments, the apparatus of the present disclosure may include only one tubular member 80. Although three nozzle passages and three tubular members have been shown and described for each of the walls 50, 52, the embodiments of the present disclosure may use any other number, more or less than three.

[0026] In some embodiments, tubular members 110a-110c, 112a-112c can be similar such that the following discussion regarding first tubular member 110a as shown in FIG. 5 applies equally to the remaining tubular members 110b, 110c, 112a-112c. For reference, FIG. 5 identifies an outer surface 70 and an inner surface 72 of first wall 50 and shows that first nozzle passage 90a can be formed within the thickness of first wall 50 between outer surface 70 and inner surface 72. In some non-limiting embodiments, a central longitudinal axis CA of first nozzle passage 90a can extend parallel to outer surface 70 and inner surface 72. In embodiments in which first wall 50 or second wall 52 (FIG. 2) provides nozzle passages, e.g., two or more of nozzle passages 90a-90c, 92a-92c (FIG. 3), this arbitrary parallel alignment of corresponding central longitudinal axes relative to corresponding outer and inner surfaces of the walls can be made for some or all of the nozzle passages.

[0027] The tubular member 110a is a tubular body defining a central passageway 120a that is open to opposing inlet and dispensing ends 122a and 124a. The tubular member 110a interfaces with the first wall 50 such that the tubular member 110a protrudes from the first long edge 60, and the central passageway 120a is in fluid communication with the first nozzle passageway 90a via the inlet end 122a. For example, the inlet end 122a can be inserted into the first nozzle passageway 90a via a generally referenced opening 100a, e.g., the outer diameter of the tubular member 110a approximates the diameter of the opening 100a. Alternatively, the inlet end 122a can be assembled against the face of the first long edge 60 with the central passageway 120a aligned with the opening 100a. The assembly or attachment of the tubular member 110a to the first wall 50 can be accomplished in a variety of ways that will be apparent to one of ordinary skill in the art, including, but not limited to, threaded interfaces, press-fitting, adhesive bonding, welding, and the like. In a related embodiment, a tubular member such as the tubular member 110a of the present disclosure can be assembled or added to an existing glass edge treatment device. Optionally, a gasket or other sealing component (not shown) can be provided to further enhance the fluid-tight seal at the interface between the first wall 50 and the tubular member 110a. In yet another embodiment, the tubular member 110a is an integrally formed part of the first wall 50. In either case, the tubular member 110a effectively extends the nozzle passage 90a from the opening 100a in the first long edge 60, and pressurized fluid dispensed into the nozzle passage 90a exits through the dispensing end 124a. Although tubular member 110a is illustrated as being generally linear or straight, in other embodiments it can have a curved or curvilinear geometry, a non-limiting example of which is shown with respect to tubular member 80' in FIG. 6.

[0028] Returning to FIG. 3, the dimensions, geometry and spatial arrangement of each tubular member 110a-110c, 112a-112c extending from the corresponding long edge 60, 62 need not be identical and can be selected according to the operating parameters of the apparatus 10 (FIG. 1). For example, the simplified top cross-sectional view of FIG. 7 shows a non-limiting example of tubular members 110a-110c projecting from the first long edge 60 of the first wall 50 relative to the finishing member 12. As shown, the length and angular orientation of the first and third tubular members 110a, 110c are different from that of the second tubular member 110b. With this one possible arrangement, the approximate intersection of the respective flow paths Q1-Q3 opened by the tubular members 110a-110c is at the periphery or circumference of the finishing member 12, so that cooling is focused at the expected contact point between the finishing member 12 and the edge of the glass sheet, not shown, during the finishing operation. By way of comparison, and with cross-reference to Figure 4B, it will be recalled that Figure 4B shows a portion of the apparatus 10 with the tubular members removed; however, without the tubular members 110a-c, the coolant flow exiting each of the openings 100a-c would interact with the periphery or circumference of the finishing member 12 at separate locations, resulting in less effective cooling of the anticipated contact points between the finishing member 12 and the glass sheet. The flow paths Q1-Q3 resulting from the size, shape and / or spatial arrangement of one or more of the tubular members 110a-c relative to the first long edge 60 differ from the centerlines CL1-CL3 of the corresponding openings 100a-c.

[0029] A further benefit that becomes apparent from a comparison of Figures 4B and 7 is that the dispensing ends 124a-124c of each of the tubular members 110a-110c are physically closer to the finishing member 12 than the corresponding openings 100a-100c. As a result, the discharged or jetted coolant flow is less likely to collapse. For example, Figure 8A shows the first nozzle passage 90a for the finishing member 12 with the first tubular member 110a (Figure 7) removed. A first gap G1 is defined as the linear distance between the opening 100a and the finishing member 12. The pressurized fluid flow (coolant) Q1 provided to the first nozzle passage 90a is represented by an arrow and initially exits the opening 100a as a focused spray or jet directed toward the expected contact point between the finishing member 12 and the glass sheet (not shown). Under typical glass sheet edge finishing, e.g., grinding or polishing conditions, the finishing member 12 rotates at high speed, entraining air and creating a high-velocity air barrier around the finishing member. Additionally, as described above, a negative pressure, e.g., a vacuum, relative to the ambient pressure outside the chamber 16, generally referred to, is created in the chamber 16 to remove particulate-laden fluid. As a result, there is typically a high-velocity cross-flow of air due to the vacuum, which may disrupt and misdirect the fluid stream jet Q1 through the drag forces acting on it. In this way, the fluid stream Q1 breaks up and becomes less focused when it reaches the finishing member 12. This possible effect is shown diagrammatically in FIG. 8A. Meanwhile, FIG. 8B shows the same arrangement as FIG. 8A, but includes a tubular member 110a. A second gap G2 is opened between the dispensing end 124a and the finishing member 12. The distance of the second gap G2 is less than the first gap G1 (FIG. 8A). Pressurized fluid stream Q1 provided to first nozzle passage 90a, again represented by arrows, exits dispensing end 124a as a focused spray or jet in close proximity to finishing member 12 and thus to the expected point of contact between finishing member 12 and a glass sheet (not shown). Tubular member 110a protects fluid stream Q1 from the cross-flow drag forces discussed above. By injecting fluid stream Q1 as close to finishing member 12 as possible, the velocity of pressurized fluid stream Q1 is maintained and therefore the air barrier created around finishing member 12 can be more easily broken down.As a result, the fluid flow Q1 is more focused when it reaches the finishing member 12 than it was in FIG. 8A.

[0030] Returning to Figure 3, the sizes, shapes, or other physical characteristics of the tubular members 110a-c, 112a-c may differ from one another and may be individually selected based on the desired spatial location of the corresponding dispensing end (e.g., dispensing end 124a, which is labeled for the first tubular member 110a in Figure 3) relative to the finishing member 12 (Figure 1) to suit a particular end use. In some embodiments, one, more than one, or all of the tubular members 110a-c, 112a-c are removably assembled to the corresponding walls 50, 52. This configuration allows some or all of the tubular members 110a-c, 112a-c to be replaced as expected operating conditions change. For example, the useful length of each of tubular members 110a to 110c, 112a to 112c can vary depending on the diameter or size of the finishing member 12 (e.g., over time, the finishing member 12 may wear and reduce its outer diameter, different finishing operations may require the use of finishing members of different configurations or dimensions, etc.), the rotational speed of the finishing member 12 for a particular finishing application, the speed at which the substrate moves relative to the finishing apparatus 10 (FIG. 1), etc.

[0031] In other embodiments, the apparatus of the present disclosure can be configured to automatically adjust or change the spatial orientation of the tubular member. For example, FIG. 9A illustrates, in simplified form, a portion of a finishing apparatus 200 according to another embodiment of the principles of the present disclosure. The apparatus 200 can be very similar to the apparatus 10 (FIG. 1) described above, and includes a shroud 202, a finishing member not shown but similar to the finishing member 12 (FIG. 1) described above, at least one tubular member 204, an actuator 206, and a controller 208. Broadly speaking, the tubular member 204 protrudes from a segment of the shroud 202 and is configured to be spatially manipulated by the actuator 206. The controller 208 is electronically coupled to the actuator 206 and configured (e.g., programmed) to drive the movement of the actuator 206 in a selected manner.

[0032] Shroud 202 may have any of the types or features described above with respect to shroud 14 (FIG. 1) and includes a wall 220 terminating in a long edge 222 that defines at least a portion of a generally referenced slot 224 that can slidably receive a glass sheet, not shown. A nozzle passage 226 is defined in wall 220.

[0033] The tubular member 204 is connected and in fluid communication with the nozzle passage 226 through an opening in the long edge 222 and defines a central passage 230 that opens into a dispensing end 232. The embodiment of FIG. 9A allows for an adjustable spatial location or positioning of the dispensing end 232 relative to the long edge 222, and thus relative to a finishing member, not shown. In some embodiments, the tubular member 204 is configured to be extendable and retractable in length, for example, via a telescoping configuration as suggested by FIG. 9A. Other extendable and retractable configurations are also contemplated, such as via bellows-like components, articulated linkages, and the like. In still other embodiments, the type of connection between the tubular member 204 and the wall 220 can be configured to allow selective extension / retraction of the tubular member 204 relative to the long edge 222, for example, the tubular member 204 can be slidably attached to the wall 220. In any event, the tubular member 204 can be articulated to extend or retract the dispensing end 232 relative to the long edge 222 in the direction indicated by the arrow "L" in Figure 9A. Figure 9B shows an example of a tubular member 204 in an extended configuration, i.e., the dispensing end 232 has been moved away from the long edge 222 compared to the configuration of Figure 9A.

[0034] In addition to or instead of extending and retracting, the tubular member 204 and / or the type of connection between the tubular member 204 and the wall 220 may be configured to allow transverse deflection or articulation of the dispensing end 232 relative to the long edge 222. For example, a hinged or pivotal connection, e.g., a ball joint, may be provided between the tubular member 204 and the wall 220. Alternatively or in addition, the tubular member 204 may be comprised of multiple pieces or portions that are pivotally connected to one another, flexible, etc. In any case, the tubular member 204 may be articulated to deflect the dispensing end 232 in any transverse direction relative to the long edge 222, as generally indicated by the arrow "T" in FIG. 9A. FIG. 9C shows an example of a tubular member 204 in a transversely articulated arrangement, as compared to the arrangement of FIG. 9B.

[0035] Returning to FIG. 9A, the actuator 206 can take a variety of forms suitable for adjusting the tubular member 204 relative to the long edge 222 and will vary depending on the particular design of the tubular member 204. For example, the actuator 206 can be or include a servo motor mechanically coupled to one or more components of the tubular member 204 such that operation of the servo motor moves at least one component of the tubular member 204 relative to another component. Other actuator types, such as hydraulic actuators, pneumatic actuators, etc., are equally acceptable. If the device 200 includes multiple tubular members 204, a separate actuator 206 can be provided for each of the tubular members 204.

[0036] The controller 208 can be or include a computer or computer-based device, such as a programmable logic controller. The controller 208 can include a processor and a memory communicatively coupled to the processor. The memory can store a set of computer-readable instructions that, when executed by the processor, at least instruct the actuator 206 to modify the spatial position of the dispensing end 232 relative to the long edge 222. The controller 208 is optionally programmed, e.g., hardware, software, electrical circuitry, to prompt the actuator 206 to operate in a predetermined manner. For example, the controller 208 can be programmed to prompt the actuator 206 to extend or retract the tubular member 204 in a predetermined manner, such as based on the particular type of the finishing member, e.g., size, number of grooves, etc., based on expected or detected wear of the finishing member, etc. In some embodiments, the controller 208 can be programmed with one or more algorithms and / or lookup tables that correlate a predetermined spatial location of the dispensing tip 232 relative to the long edge 222 with a time of operation of the finishing member, e.g., when a new finishing member is first installed, the algorithm and / or lookup table identifies a first spatial location of the dispensing tip 232, after a first period during which the finishing member is used to finish an edge of a substrate, the algorithm and / or lookup table identifies a second spatial location of the dispensing tip 232 that is generally farther from the long edge 222 than the first spatial location, after a second period during which the finishing member is still used to finish an edge of a substrate, the algorithm and / or lookup table identifies a third spatial location of the dispensing tip 232 that is generally farther from the long edge 222 than the second spatial location, etc. In other embodiments, the controller 208 can include or consist of a user input device that allows a user to select a desired spatial arrangement of the tubular member 204.The controller 208 may be electronically connected to the actuators 206 via a wired or wireless connection. In some embodiments, the controller 208 may be a controller that operates to control other operations of the apparatus 200 and / or other operations of a finishing system in which the apparatus 200 is installed.

[0037] Returning to FIG. 1, the method of the present disclosure includes operating the apparatus 10 to treat an edge of a substrate, such as an edge of a glass sheet. In some embodiments, and with further reference to FIG. 10, one or more edge treatment devices 10 may be provided as part of an edge treatment system 300 that further includes a transport device 302 of a type known in the art. The transport device 302 operates to transport a glass sheet 304 or other substrate toward the edge treatment device 10. As the glass sheet 304 continues to be transported in the direction indicated by the arrows in FIG. 10, an edge 306 of the glass sheet 304 enters a shroud 14 via a generally referenced slot 40. In some embodiments, the system 300 may include one or more additional treatment devices, such as for treating an opposite edge 308 of the glass sheet 304, for further edge treatment downstream of the apparatus 10, etc. In any case, and with further reference to FIG. 11, upon entering the shroud 14, the edge 306 comes into contact with a finishing member 12, which is in turn driven, e.g., rotated, to achieve the desired treatment, e.g., grinding, polishing, etc. At the same time, a flow of coolant Q1, represented by an arrow, is discharged into the nozzle passage 90a. The flow of coolant Q1 is forced out of the central passage 120a of the tubular member 110a and then directed or sprayed through the distribution end 124a onto the interface 310 between the finishing member 12 and the edge 306. Coolant may also be sprayed onto the interface 310 from other tubular members, not shown, if present. The disclosed method further includes an optional step of periodically adjusting the spatial positioning of the tubular member 110a relative to the long edge 60, and thus the finishing member 12, as described above. In some embodiments, the adjustment of the tubular member 110a is automatic in response to wear of the finishing member 12.

[0038] Various modifications and variations of the embodiments described herein are possible without departing from the scope of the claimed subject matter, and thus, it is intended that the present specification cover modifications and variations of the various embodiments described herein, provided such modifications and variations come within the scope of the appended claims and their equivalents.

[0039] Preferred embodiments of the present invention will be described below in detail.

[0040] EMBODIMENT 1 An apparatus for processing edges of a sheet-like substrate, comprising: a finishing member for treating the edge of the sheet-like substrate; a shroud defining a chamber for rotatably retaining the finishing member, a first wall terminating in a first long edge; a second wall terminating at a second long edge opposite the first long edge; the first long edge and the second long edge collectively define at least a portion of a slot open to the chamber and configured to slidably receive the edge of the sheet-like substrate that interacts with the finishing member; a shroud, the first wall defining a first nozzle passage for discharging a fluid, the first nozzle passage terminating in a first opening in the first long edge; and a first tubular member projecting from the first long edge and defining a passageway in fluid communication with the first nozzle passageway; An apparatus comprising:

[0041] EMBODIMENT 2 2. The apparatus of embodiment 1, wherein the first tubular member is configured to direct a flow of coolant from the first nozzle passage toward the finishing member.

[0042] EMBODIMENT 3 2. The apparatus of embodiment 1, wherein the first tubular member terminates at a dispensing end opposite the first long edge, the distance between the dispensing end and the finishing member being less than the distance between the first long edge and the finishing member.

[0043] EMBODIMENT 4 2. The device of embodiment 1, wherein the first wall further defines opposing outer and inner surfaces, and the first long edge extends between and is adjacent to the outer and inner surfaces.

[0044] EMBODIMENT 5 5. The apparatus of embodiment 4, wherein the first nozzle passage is defined within a thickness of the first wall between the exterior surface and the interior surface.

[0045] EMBODIMENT 6 2. The device of embodiment 1, wherein the first long edge is chamfered relative to a remainder of the first wall.

[0046] EMBODIMENT 7 2. The device of embodiment 1, wherein the position of the first tubular member relative to the first long edge is adjustable.

[0047] EMBODIMENT 8 8. The apparatus of embodiment 7, further comprising an actuator coupled to the first tubular member and configured to adjust the first tubular member relative to the first long edge.

[0048] EMBODIMENT 9 2. The device of embodiment 1, wherein the first tubular member is removably assembled to the first wall.

[0049] EMBODIMENT 10 2. The device of embodiment 1, wherein a second nozzle passage for ejecting a fluid is defined in the first wall, the second nozzle passage being spaced from the first nozzle passage and terminating in a second opening in the first long edge, the device further comprising a second tubular member protruding from the first long edge and defining a passage in fluid communication with the second opening.

[0050] EMBODIMENT 11 2. The device of embodiment 1, wherein a second nozzle passage for ejecting a fluid is defined in the second wall portion, the second nozzle passage terminating in a second opening in the second long edge, the device further comprising a second tubular member projecting from the second long edge and defining a passage in fluid communication with the second opening.

[0051] EMBODIMENT 12 2. The apparatus of embodiment 1, wherein the shroud further defines an exhaust passage in fluid communication with the chamber, the exhaust passage removing contaminants from the chamber when a vacuum is applied to the exhaust passage.

[0052] EMBODIMENT 13 An apparatus for processing edges of a sheet-like substrate, comprising: a finishing member for treating the edge of the sheet-like substrate; a shroud defining a chamber for rotatably retaining the finishing member, a wall terminating in a long edge, the long edge defining at least a portion of a slot opening into the chamber and configured to slidably receive the edge of the sheet-like substrate for interaction with the finishing member, the wall defining a nozzle passage for discharging a fluid, the nozzle passage terminating in an opening in the long edge; a shroud including: a tubular member removably assembled to said wall portion and projecting from said long edge, said tubular member defining a passageway in fluid communication with said nozzle passageway; An apparatus comprising:

[0053] EMBODIMENT 14 14. The device of embodiment 13, wherein the tubular member is removably assembled to the wall portion by at least one of a threaded connection and a press-fit connection.

[0054] EMBODIMENT 15 1. A method for treating an edge of a sheet-like substrate, comprising the steps of: directing the edge of the sheet-like substrate through a slot in a shroud of a processing device and into a chamber of the shroud, the slot being defined at least in part by a long edge of a wall of the shroud; treating the edge of the sheet-like substrate with a finishing member disposed within the chamber; and during said treating step, directing a flow of coolant to an interface between said edge of said sheet-like substrate and said finishing member through a tubular member protruding from said long edge, said tubular member defining a central passage in fluid communication with a nozzle passage defined in said wall. The method includes:

[0055] EMBODIMENT 16 16. The method of embodiment 15, further comprising adjusting the positioning of the tubular member relative to the long edge.

[0056] EMBODIMENT 17 17. The method of embodiment 16, wherein the adjusting step comprises varying a distance between a dispensing end and the long edge of the tubular member.

[0057] EMBODIMENT 18 17. The method of embodiment 16, wherein the adjusting step comprises changing an angular relationship of a central axis of the tubular member relative to the long edge.

[0058] EMBODIMENT 19 The adjusting step includes: monitoring wear of the finishing member; and Varying the spatial position of the tubular member relative to the long edge based on wear of the finishing member. 17. The method of embodiment 16, comprising:

[0059] EMBODIMENT 20 20. The method of embodiment 19, wherein the monitoring step is performed by a computing device operating on software programmed to prompt changes in the spatial orientation of the tubular member relative to the long edge. [Explanation of symbols]

[0060] 10 Edge treatment device 12 Finishing materials 14, 202 Shroud 16 Chamber 18 Inlet Port 20 Motor 30 Cover 32 Base 34 Hinge 36 Exhaust Duct 38 Exhaust channel 40,224 slots 50, 52, 220 wall section 60, 62, 222 Long edge 70 Exterior 72 Inside 80, 80', 110a, 110b, 110c, 112a, 112b, 112c, 204 Tubular member 90a, 90b, 90c, 92a, 92b, 92c, 226 nozzle passage 100a, 100b, 100c, 102a, 102b, 102c opening 120a, 230 center aisle 122a Inlet end 124a, 124b, 124c, 232 distribution end 200 Finishing Equipment 206 Actuator 208 Controller 300 Edge Treatment System 302 Transportation Devices 304 Glass Sheet 306, 308 Edge of glass sheet 310 Contact surface CA Center Longitudinal Axis CL1, CL2, CL3 center line G1, G2 gap L direction P Center plane Q1, Q2, Q3 flow path (fluid flow) T transverse direction

Claims

1. An apparatus for processing edges of a sheet-like substrate, comprising: a finishing member for treating the edge of the sheet-like substrate; a shroud defining a chamber for rotatably retaining the finishing member, a first wall terminating in a first long edge; a second wall terminating at a second long edge opposite the first long edge of the first wall; the first long edge and the second long edge collectively define at least a portion of a slot open to the chamber and configured to slidably receive the edge of the sheet-like substrate that interacts with the finishing member; a shroud, the first wall defining a first nozzle passage for discharging a fluid, the first nozzle passage terminating in a first opening in the first long edge; and an articulated first tubular member projecting from the first long edge and defining a passageway in fluid communication with the first nozzle passageway, the first tubular member configured to direct a flow of coolant from the first nozzle passageway onto the finishing member; An apparatus comprising:

2. 2. The apparatus of claim 1, wherein the articulated first tubular member terminates in a dispensing end opposite the first long edge, the distance between the dispensing end and the finishing member being less than the distance between the first long edge and the finishing member.

3. 3. The device of claim 1 or 2, wherein the first wall further defines opposed outer and inner surfaces, and the first long edge extends between and adjacent to the outer and inner surfaces.

4. the articulated first tubular member an extension or contraction relative to the first major edge; and biased transversely relative to said first major edge; The apparatus according to claim 1 , configured to perform at least one of the following:

5. 5. The apparatus of claim 1, further comprising a controller configured to control articulation of the articulating first tubular member.

6. 1. A method for treating an edge of a sheet-like substrate, comprising the steps of: directing the edge of the sheet-like substrate through a slot in a shroud of a processing device and into a chamber of the shroud, the slot being defined at least in part by a long edge of a wall of the shroud; treating the edge of the sheet-like substrate with a finishing member disposed within the chamber; and during said treating step, directing a flow of coolant toward an interface between said edge of said sheet-like substrate and said finishing member through an articulated tubular member projecting from said long edge, said articulated tubular member defining a central passage in fluid communication with a nozzle passage defined in said wall. The method includes:

7. The method of claim 6 further comprising adjusting the alignment of the articulated tubular member relative to the long edge.

8. The method of claim 7 , wherein the adjusting step includes varying a distance between a dispensing end and the long edge of the articulated tubular member.

9. The method of claim 7 , wherein the adjusting step includes changing an angular relationship of a central axis of the tubular member to the long edge.

10. The adjusting step includes: monitoring wear of the finishing member; and Varying the spatial orientation of the articulated tubular member relative to the long edge based on wear of the finishing member. The method of claim 7, comprising:

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