GLASS CONTAINER WITH RAISED INDICATION

Abstract

A glass-shaped blank mold (52, 152) having an inner surface (66, 166) and an engraving (64, 164) on the inner surface, wherein the engraving, in cross-section, includes a radial outer surface (74, 174) and side walls (76, 78, 176, 178) including fillets (84, 184), and is rounded (86, 186), such that the side walls are not straight but, instead, continuously curved and wherein the ratio of the radius of gyration to the radial depth (80) of the engraving is between 3:1 and 9:1. Methods for making a glass container using a mold are also disclosed, as is the glass container itself (20, 120).

Description

Description of GLASS CONTAINER WITH INDICA EMBOSSING Technical Field of Invention The present invention is directed to containers and, more particularly, glass containers and methods and apparatus for manufacturing them. Background of the Invention In general, a glass bottle consists of a body, shoulder, neck, and stopper. Such bottles can be produced using a blow-and-blow process or a press-and-blow process. U.S. Patent Document 8,333,287 discloses a method of manufacturing a long neck bottle by pushing a parison neck against a debossed internal surface of a mold blank to form a radially thick external embossment on the parison neck, and then blowing the embossed parison neck on the internal surface of the blow mold to push the external embossment on the neck through the neck wall to form a radially thick and inwardly protruding embossment inside the bottle so as to affect the flow of liquid thereon. Commercial implementations of this method include the use of a radially deep and circumferentially wide mold debossment / engraving: 0.64 mm deep, and 3.6 mm wide, wherein the entire engraving is defined by a continuously curved surface defined by a single fillet of 2.8 mm radius and 3.2 mm radius turns on either side of the circumference of the fillet.These dimensions are chosen to produce a thick radial embossment that projects radially inward thus providing good agitation or control of the direction of the liquid flow over it. U.S. Patent Application Publication No. 2015 / 0096913 discloses a method for manufacturing a glass container having a sharp indication outline. The method includes forming an embossment on the outer surface of a parison, and pushing the embossment on the internal surface of a blow mold to collapse the embossment into the container wall without pushing compliant material through the container wall to the interior of the container. The method includes using a debossment / engraving mold with a thickness of 0.3 mm and a width of 3 mm, with a radial outer surface, straight / flat side walls angled at 45 to 75 degrees, a 0.3 mm fillet between the outer surface and the side wall, and a 0.15 mm roundness between the side wall and the interior surface of the mold. Such dimensions are chosen to produce a good resolution indication on the outer surface of the container. Summary of Invention The present invention includes a number of aspects which may be applied separately from or in combination with each other. In accordance with the invention, a glass-shaped mold blank is provided having an inner surface and an engraving on the inner surface. The engraving, in cross-section, includes a radial outer surface, and side walls connecting the radial outer surface to an internal surface of the mold blank. Each side wall comprises a fillet and a circle between the radial outer surface and the internal surface of the mold blank, so that the side walls are not straight but are continuously curved. According to certain aspects of the invention, the circumference width of the radial outer surface is at least 1.0 mm, the radial thickness between the inner surface and the radial outer surface is from 0.2 mm to 0.4 mm, the fillet has a radius of between 0.2 mm and 0.4 mm, the sphere has a radius of between 1.25 mm and 1.75 mm, the overall width of the circumferential carving is at least 1.8 mm, and the sidewall is characterized by a tangent line between the fillet and the sphere, and wherein each fillet extends above an angle of less than 90°. In accordance with other particular aspects of the invention, the ratio of the fillet radius to the radial depth of the engraving is between 0.5:1 and 2:1. In addition, the ratio of the gyration radius to the radial depth of the engraving is between 3:1 and 9:1. Similarly, the ratio of the gyration radius to the fillet radius is between 3:1 and 9:1. In addition, the ratio of the container wall thickness to the radial depth of the engraving is between 3:1 and 15:1. Short Description of Image The invention, together with its additional objects, features, advantages and aspects, will be best understood from the following description, the appended claims and the accompanying drawings, wherein: Figure 1 is an elevation view of a long-neck beer bottle having well-defined, radially legible inward-projecting text, in accordance with an illustrative embodiment of the present invention; Figure 2 is an enlarged, fragmentary, cross-sectional view of the bottle of Fig. 1, taken along line 2-2 of Fig. 1; Figure 3 is a longitudinal, fragmentary, cross-section of the bottle of Fig. 1, taken along line 3-3 of Fig. 1; Figure 4 is an elevation view of a bottle having a clear and legible radially projecting inward graphic, in accordance with another illustrative embodiment of the present invention; Figure 5 is a longitudinal cross-sectional view of a blank mold assembly, in accordance with an illustrative embodiment of the present invention; Figure 6 is an elevation view of the blank mold assembly of Fig.5, taken along line 6 of Fig.5 and reversed; Figure 7 is an enlarged fragmentary view of the carved indicia portion of the blank mold of Fig. 6; Figure 8 is an enlarged cross-sectional view of the blank mold portion of Fig.6, taken along line 8-8 of Fig.7; Figure 9 is an enlarged fragmentary view of an alternative part of the blank mold of Fig. 6, illustrating the graphic engraving; Figure 10 is an enlarged cross-sectional view of the section of Fig.9, taken along the line 10 -10 of Fig.9; Figure 11 is a longitudinal cross-sectional view of a blow mold assembly, in accordance with an illustrative embodiment of the present invention; Figure 12 is an enlarged, fragmentary, schematic cross-sectional view of a comparison wall blown toward the internal surface of the blow mold of the blow mold assembly of Fig. 11; Figure 13 is an enlarged, fragmentary, schematic cross-sectional view of a comparison wall blown into contact with the inner surface of the blow mold of the blow mold assembly of Fig. 11; Figure 14 is an enlarged, fragmentary, schematic cross-sectional view of a blow mold of Fig. 11 to make a container, and illustrates a parison embossment being driven into the container wall to push the corresponding container wall material through the interior surface of the container wall; Figure 15 is a height view of the blank print body to produce a comparison for a wine bottle, and includes block text; Figure 16 is an elevation view of a blank mold body to produce a comparison for a wine bottle, and includes writing or script text; and Figure 17 is a fragmentary elevation view of a wine bottle produced by the blank mold body of Fig. 15 and illustrates the well-defined, legible, radially projecting text inward on the front of the bottle. Complete Description of the Invention Figure 1 illustrates a container 20, which may be a bottle, extending along a longitudinal central axis A in accordance with one illustrative embodiment of the present invention. The container 20 may include a closed base 22, a body 24 extending longitudinally from the base 22 at one end of the body 24, a shoulder 26 extending longitudinally and radially inward from the other end of the body 24, and a neck 28 extending longitudinally from the shoulder 26 terminating at a lip 30. The container 20 also includes a neck cap 32 axially spaced from the shoulder 26 and terminating at the neck 28, and including one or more features for attaching the desired cap (not shown). In an embodiment, the neck cap 32 may have an outer cap diameter of not more than 36 mm. In accordance with the present invention, a container 20 includes integral indicia 34 on an inner, interior, or interior surface 36 that generally faces radially inward from the container 20. As illustrated in FIG. 1, the indicia 34 include block text, but may also or alternatively include script writing, logos, graphics, or other legible indications. As will be described in more detail below, the indications 34 are formed according to the presently disclosed method. The container (20) may be of any suitable shape and size, may be comprised of glass, may be made by a press-and-blow and / or blow molding operation, or by other suitable techniques, and may be used to contain, for example, a beverage, e.g., beer, wine, alcohol, soda, or the like, or other flowable product. The container (20) is of integrally formed one-piece construction, e.g., of glass, ceramic, or plastic construction. (The term integrally formed construction does not exclude integrally formed one-piece laminated glass construction of the type disclosed e.g. in U.S. Patent 4,740,401, or a one-piece glass bottle to which other structures are added after the bottle forming operation.) With reference to FIGS. 2 and 3, the container (20) includes an inner surface (36) from which indicia 34 project radially inward, and an outer, exterior, or external surface that generally faces radially outward 38. Also, the container (20) has a radial wall thickness (27) between the inner and outer surfaces 36, 38. As used herein, the terminology generally radially does not need to be in a direction perpendicular to the axis A container 20 and includes a direction at an oblique angle, for example, perpendicular to the outer surface of the neck of the container 28. Indicia 34 includes embossments 40 that may appear as inward protrusions or projections that project inward in cross-section and may be spaced apart and in relation to each other. For example, the embossment 40 may include lands 48 that are longitudinally parallel to the internal surface of the container 36 and spaced radially inward with respect to the remainder of the internal surface of the container 36, and the sides 42 include fillets 44 that extend inward from the internal surface 36 and laps 46 extending from fillets 44 to lands 48. Therefore, the sides 42 are not straight but are continuously curved, where each side 42 comprises an inflection point between, or tangent to, fillets 44 and laps 46. Lands 48 may include arc lengths that may be circular or cylindrical, e.g., parallel to the outer or inner surface of the container. The resolution of the indicia 34 is unexpectedly well defined and legible, considering that the outer surface (38) of the container is smooth in its portions corresponding to the indication 34 without scars or other marks or design remnants. The inventors find that preforming the indicia 34 with smooth, continuous curved sides, and new geometry, dimensions, and / or dimensional relationships, into the outer surface of the comparison during the blank molding stage, results in a legible and clear presentation of the indication 34. In contrast to the inner surface (36), and contrary to some other embossing techniques, the outer surface (38) does not include a V-shaped depression. Instead, the outer surface (38) may be substantially cylindrical, or conical (on a conical neck), or at least substantially circular in cross-section. In the illustrated example, the width of the embossment 40 in the circumferential direction may be at least 2.4 mm. Also, the radial depth or thickness of the embossment 40 (from the inner surface of the land 48 to the adjacent inner surface 36 of the container) is significantly less than the wall thickness of the container, but the embossment 40 protrudes into the interior of the container. In the illustrated example, the wall thickness of the container 27 may be 1.5 mm to 3.0 mm including all ranges, subranges, and values ​​in between, and more specifically for example, about 2.25 mm. Also, the radial thickness of the embossment 40 may be 0.2 mm to 0.4 mm including all ranges, subranges, and values ​​in between, for example, about 0.32 mm, i.e., 0.30 mm to 0.34 mm. In addition, each fillet 44 may have a radius between 0.2 mm and 0.4 mm including all ranges, subranges, and values ​​in between, for example, about 0.3 mm, i.e., 0.28 mm to 0.32 mm. Each round 46 may have a radius between 1.25 mm and 1.75 mm including all ranges, subranges, and values ​​in between, for example, about 1.5 mm, i.e., between 1.4 mm and 1.6 mm. Thus, the ratio of the container wall thickness (in the area corresponding to and / or adjacent to the embossment) to the radial thickness of the embossment may be between 3:1 and 15:1, including all ranges, subranges, and values ​​in between, and in the above example, the ratio may be about 7:1. According to the illustrated example, each fillet 44 may have a radius approximately equal to the radial thickness of the embossment 40. According to another example, the ratio of the radius of the fillet 44 to the radial thickness of the embossment may be between 0.5:1 and 2:1. Also according to the illustrated example, the loop 46 may have a radius approximately five times the radial thickness of the embossment 40 and approximately five times the size of the fillet 44. According to another example, the ratio of the radius of the loop 46 to the radial thickness of the embossment 40 may be between 3:1 and 9:1 including all ranges, subranges, and values ​​in between. Figure 4 illustrates another illustrative embodiment of container 120. Container 120 includes integral indicia 134 on interior or internal surfaces 136. As illustrated in FIG. 4, indicia 134 include a graphic logo and, more specifically, a recycling logo. Indicia 134 may be located on the neck 128 of container 120 or at another convenient location of container 120. This embodiment is similar in many respects to the embodiments of FIG. 1 to 3 and like numbers among embodiments generally refer to similar or corresponding elements throughout the multiple views of the drawings. Accordingly, the descriptions of the embodiments are combined with each other, and the description of the subject matter common to the embodiments generally cannot be repeated herein. Figure 5 illustrates an example of a blank mold assembly (50) that may be used to form a preform of a container or proportion (not shown), which in turn, may include features used to produce indications 34, 134 in containers 20, 120 of FIGS. 1-4. The assembly (50) may include a blank mold (52), a neck ring and plunger assembly (54) at one end of the mold 52, a baffle 56 at the other end of the mold 52, and an adapter and spreader assembly 58 next to the mold 52. The illustrated assembly (50) includes a typical neck ring and plunger assembly (54), but one skilled in the art will recognize that the assembly (50) may instead include a press-and-blow assembly with a body plunger and the like.To produce a preform or proportion container, a charge or gob of molten glass is placed within the mold blank 52 and a plunger and / or blow gas is introduced into the mold 52 to compress and / or blow the glass to conform to the mold components. Thereafter, the plunger and other mold components can be retracted to allow the proportion to be removed from the assembly 50 and transferred to the blow mold. Figure 6 illustrates a blank mold 52 as including a longitudinal Z axis, a body region 60, and a neck region 62. The mold 52 also includes engraved indicia 64 on an inner or inner surface 66 facing radially inward of the mold 52. In the embodiment illustrated in FIG. 6, the engraving 64 may be located in the neck region 62, but may be located in the body region 60 in other embodiments. Figure 7 more closely illustrates engraving 64. Engraving 64 may include block text of one or more letters. In the example illustrated in FIG. 7, the letter height is approximately 8.7 mm, and the width 68.69 of the engraving within each letter may have a uniform width, for example, 1.2 mm to 2.5 mm. As used in this context, the term substantially falls within plus or minus 5%. In addition, each letter may include a tightest fillet 70 and a loop 72 (or a mixture), which may face longitudinally, circumferentially, or both. In the example illustrated in FIG. 7, the fillet 70 and loop 72 may have a radius of approximately 0.4 mm. As used here, the term about falls within plus or minus 10%. Figure 8 shows a portion of an engraving 64 in cross-section of a mold blank taken perpendicular to the longitudinal axis Z (FIG. 6 and FIG. 7). The engraving 64 includes a radially outer surface 74 that faces radially inward toward the central longitudinal axis Z (FIG. 6) of the mold 52. The radially outer surface 74 of the engraving 64 in the mold blank corresponds to the land surface 48 of the embossment 40 of the container 20 shown in FIG. 2, and is substantially flat in the circumferential direction as well as in the axial / longitudinal direction. As used herein the phrase substantially flat may include a surface defined by a radius greater than the radius of the inner surface 66 of the mold 52 adjacent to or surrounding the engraving. The engraving 64 also includes first and second side walls 76, 78 facing circumferentially and radially inward and extending between the surface 74 and the internal surface 66 of the mold blank 52.In addition, the engraving 64 has a radial depth of 80 between the radial outer surface 74 and the inner surface 66 of the mold 52, and the radial outer surface 74 has a width of 81. In addition, the side walls 76, 78 are continuously curved, because each side wall 76, 78 comprises an inflection point between, or tangent to, a fillet 84 and a turn 86. In the illustrated example, fillet 84 may have a radius between 0.2 mm and 0.4 mm including all ranges, subranges, and values ​​therein, for example, about 0.3 mm, i.e., 0.28 mm to 0.32 mm. According to the illustrated example, fillet 84 may have a radius approximately equivalent to the radial depth 80 of the engraving 64. According to another example, the ratio of the radius of fillet 84 to the radial depth of the engraving may be between 0.5:1 and 2:1 including all ranges, subranges, and values ​​therein. A round 86 or a mixture of side walls 76, 78 is located between the fillet 84 and the inner surface 66 of the mold 52. In the illustrated example, the round 86 may have a radius between 1.25 mm and 1.75 mm including all ranges, subranges, and values ​​in between, for example, about 1.5 mm, that is, between 1.3 mm and 1.7 mm. According to the illustrated example, the round 86 may have a radius that is approximately five times the radial depth 80 of the engraving 64 and about five times the size of the fillet 84. According to another example, the ratio of the radius of the round 86 to the radial depth engraving 80 may be between 3:1 and 9:1. The fillet and the round 84, 86 may be produced with suitable features on the tool used to produce the engraving, and / or with a wire brush after the engraving is cut or produced, or may be produced by other suitable means. Therefore, the engraving 64 has a circular overall width of 87, for example, where each turn 86 meets the inner surface 66 of the mold. The width 87 may be greater than 2.4 mm. In any case, the relationship between the radial thickness of the engraving 64 and the fillets 84 and turns 86 of the engraving 64 is such that the side walls 76, 78 are not flat / straight and, instead, are continuously curved and characterized by fillets 84 each extending at an angle of less than 90° and turns 86 that are tangent to fillets 84 at inflection points between surface 74 and internal surface 66. In the illustrated example, the radial depth 80 of engraving 64 might be 0.2 mm to 0.4 mm including all ranges, sub-ranges, and values ​​in between. For example, the radial depth 80 might be approximately 0.32 mm, which is 0.30 mm to 0.34 mm. In any case, the radial depth 80 is such that at least some of the container material is “pushed into the interior of the container to produce a clear and legible indication. Also, in the illustrated example, the circumferential width 81 of the surface 74, for example, in the circumferential direction, is greater than 1.0 mm. The width 81 relates only to the width of the surface 74 and does not include the fillet 84 or the lap 86. Therefore, the ratio of the container wall thickness (in the region corresponding to and / or adjacent to the embossing) to the radial depth of the engraving may be between 3:1 and 15:1, including all ranges, subranges, and values ​​in between, and in a specific example, the ratio may be approximately 7:1. Figure 9 illustrates another embodiment of an engraving 164. In the illustrated example, the overall height of the logo engraving 164 may be about 18 mm, the overall width may be about 14.7 mm, and the width of the engraving element 164 may range from about 3 mm to about 7 mm. In addition, each engraving element 164 may include a tight fillet 170 and a loop 172 facing in a longitudinal, transverse, or circular direction. In the example illustrated in FIG. 9, the fillet 170 may have a radius of about 0.1 mm to 0.3 mm and all ranges, subranges, and values ​​in between, and, more particularly about 0.2 mm, while the loop 172 may have a radius of about 0.3 mm. Figure 10 shows a portion of the engraving 164 in cross-section taken perpendicular to the longitudinal axis of the mold (see FIG. 9). The engraving 164 may be circumferentially centered on the mold 152, and include a radial outer surface 174, and side walls 176,178 connecting the radial outer surface 174 to a radially inward-facing inner or internal surface 166 of the mold 152. The radial outward outer surface 174 may be of a geometry similar to the internal surface. The engraving 164 also includes a fillet 184, and a blend or lap 186 having the same dimensions as described in connection with FIG. 8. In the illustrated example, the radial thickness 180 of the engraving 164 may be the same as that in FIG. 8, while the circumferential width 181 of the surface 174 may be two to three times greater or even more. In the embodiment of FIG. 7-10, the radius of the fillet 84, 184 may be less than the radial thickness 80, 180 of the engraving 64, 164. The radius of the rotation 86, 186 is greater than the radius of the fillet 84, 184. Therefore, , the radial thickness 80, 180 of the engraving 64, 164 is smaller than the rotation radius 86, 186. Figure 11 illustrates an example of a blow mold assembly (90) that may be used to form a receptacle (20) of FIG. 1 from a parison formed in a blank mold (52) (FIG. 5). The assembly 90 may include a blow mold 92 having an interior or internal surface 93, a blow head 94 at one end of the mold 92, a bottom plate 96 at the other end of the mold 92, and a neck insert 98 carried on the blow end of the mold 92. A blow gas is directed through the blow head 94 and into the open end and interior of the parison to expand the parison to fit the blow mold assembly 90. Those of ordinary skill in the art will recognize that a vacuum may be applied to the outside of the parison to draw the parison into contact with the mold surface. FIGS. 12-14 depict, schematically, the blow mold portion 92 of FIG. 11 and the parison 20' including the embossment 64' produced by the engraving 64 of the blank mold 52 of FIG. 5-8. The parison 20' is blown so as to expand outward toward the blow mold 92 as shown in FIG. 12, and to push the embossment 64' into contact with the internal surface 93 of the blow mold 92 as shown in FIG. 13. The parison 20' is further blown so as to further push another portion of the parison 20' around the embossment 64 into contact with the internal surface 93 of the blow mold 92 as shown in FIG. 14 to form a container 20 having an indication 34 visible without any scars or residue on the smooth external surface of the container 38 (FIG. 2).Accordingly, the blow mold 92 acts to push the embossment 64' into the thickness of the container wall 20 thereby pushing the container material so that it protrudes radially inward from the interior surface of the container 20. The emboss blank 64' smoothly bends into the container wall 20, to form a conforming container embossment 40 with its lands 48, by pushing the conforming material through the container wall 20 into the interior 19 of the container 20. It is believed that one or more aspects of the currently disclosed engraving geometry, dimensions, or dimensional relationships allow portions of the emboss blank 64' to slide outward, rather than being folded or tightened, into the container wall as the emboss 64' is pushed into the container wall. The shape of the embossment 40 is typically a duplication of the shape of the emboss blank / parison 64', albeit with some distortion and loss of definition after being pushed through the container wall. Figures 15 to 17 show other illustrative embodiments according to the present invention. These embodiments are in many respects similar to the embodiments of FIGS. The numerals 1 to 14 and similar numerals among embodiments generally refer to similar or corresponding elements throughout the several views of the drawings. Accordingly, the descriptions of the embodiments are combined with each other, and the description of the subject matter common to the embodiments generally cannot be repeated herein. Referring to Fig. 15, the blank mold 152' includes a body portion 160' and a neck portion 162', and an inner or internal surface 166' facing radially inward. The internal surface 166' in the body portion 160' includes engraved indicia 164' of the block text. Similarly, with reference to FIG. 16, the mold blank 252 includes a body portion 260 and a neck portion 262, and a radially inward facing inner or interior surface 266. The interior surface 266 of the body portion 260 includes engraved indicia 264 of letters or script text. In either case, and with reference to FIG. 17, the presently disclosed apparatus, process, and dimensional instruction may be used to produce a receptacle 220 from a parison formed in a blank mold 152 (FIG. 15), having a body 224 with well-defined and legible indications 234, in an inner surface or interior 236 of the body 224. Those skilled in the art know that the parison may stretch during manufacture, particularly when transferred from the blank mold to a blow mold. Therefore, it is believed that producing the indicia 234 in a receptacle body may involve some application-specific adjustments to be made to the engraving geometry to account for such stretching. For example, some of the engraving geometry may need to be compressed to compensate for the elongation of the embossed features in the parison due to the stretching of the parison.However, the presently disclosed method will be able to be used to produce a clear and legible indication of the present invention in a container body. The present invention provides an advancement in the art. Some prior approaches to embossing containers yield satisfactory results for their particular purposes, but will result in thick and wide radially projecting embosses that are not sufficiently defined to be useful in providing well-defined legible indications such as lettering and logos. Other prior approaches to embossing containers also yield satisfactory results for their intended purposes, but may result in scarring of the outer surface of the container around the embossment such that the outer surface has an etched appearance at and / or adjacent to the embossment. The shape and dimensions of the die engraving for the prior approaches may be effective in achieving certain results sought for those particular approaches, but are not effective in achieving certain results currently taught herein. Conventional wisdom holds that the engraving of a die blank to produce embossed indicia should be relatively deep and steeply angled, with straight or flat side walls and tight fillets and turns, to achieve the desired degree of legibility of the embossment. The present invention now allows for the production of containers having embossed surfaces with improved resolution, using die blanks having specific geometries, dimensions, and / or dimensional relationships to produce embossed blanks to push material through the walls of the container into the interior of the container during blow molding. More specifically, the present invention enables unexpectedly good results in the form of containers with very clear and legible indications projecting radially inward from the interior surface of the container, and without producing scarring on the exterior surface of the container.These results differ in kind and not only in degree from the results of previous approaches. It is believed that two or more parameters / variables of the revealed print interact in unexpected ways to produce the excellent results presented here. Thus, a container has been disclosed that fully satisfies all the objects and purposes set forth above. The invention has been presented in connection with several illustrative embodiments, and additional modifications and variations have been discussed. Other modifications and variations will readily be suggested to those having ordinary skill in the art in light of the foregoing discussion. The invention is intended to encompass all modifications and variations that are consistent with the spirit and broad scope of the appended claims.

Claims

1. A glass-shaped mold blank (52, 152) having an inner surface (66, 166) and an engraving (64, 164) on the inner surface, wherein the engraving, in cross-section, comprises: a radial outer surface (74, 174) and a side wall (76, 78, 176, 178) connecting the radial outer surface to the internal surface of the mold blank, wherein the side wall comprises a fillet (84, 184) and a round (86, 186), so that the side wall is not straight but rather continuously curved, wherein the ratio of the radius of gyration to the radial depth (80) of the engraving is between 3:1 and 9:

1.

2. A mold as per claim 1, wherein the ratio of the fillet radius to the radial depth of the engraving is between 0.5:1 and 2:

1.

3. A mold as per claim 1, wherein the ratio of the wall thickness of the container to the radial depth of the engraving is between 3:1 and 15:

1.

4. The mold as per claim 1, wherein the circular width (81, 181) of the radial outer surface is at least 1.0 mm.

5. The mold as per claim 1, wherein the radial thickness (80, 180) between the internal surface and the radial outer surface is 0.2 mm to 0.4 mm.

6. The mold as per claim 1, wherein the fillet has a radius of between 0.2 mm and 0.4 mm, the circle has a radius of between 1.25 mm and 1.75 mm.

7. The mold as per claim 1, wherein the overall circular width (87) of said engraving is at least 1.8 mm.

8. A mold as per claim 1, wherein each fillet extends at an angle of less than 90°.

9. The mold as in claim 1, wherein the side walls are characterized by a tangent line between the fillet and the sphere.

10. A mold as per claim 1, wherein the ratio of the radius of rotation to the radial depth of the engraving is between 3:1 and 9:

1.

11. A method of manufacturing a glass container (20, 120) having a base (22), a body (24) extending axially from the base, and generally a radially outward facing outer surface (38), said method comprising the steps of: a) providing a glass forming mold blank of claim 1; b) forming a parison (20') to conform to an internal surface of the mold blank including engraving on the inner surface to form an embossment (64') on the outer surface of the parison; and c) blowing the parison into conformity with an internal surface (93) of a blow mold (92) to produce a container (20) from the parison, including pushing the embossment on the internal surface of the blow mold into a wall (32) of the container to push the conforming material through the wall of the container into the interior (19) of the container.

12. The method as of claim 11, wherein the provision step (a) comprises an engraving disposed in at least one of the neck portion (62) or body portion (60) of the mold blank such that an embossment is formed in at least one of the neck portion or body portion of the parison.

13. A glass container manufactured by the method as per claim 11 and including legible indications (34, 134, 234) having an outer surface portion co-extensive with the outer surface (38) of an adjacent portion of the container and an inner surface of India (48) protruding radially inward with respect to the inner surface (36) of the container adjacent to the indicia.

14. A glass container as per claim 13, wherein the outer surface has no V-shaped depressions and is substantially scar-free.

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