Abstract
A holding device for holding packaging containers for pharmaceutical, medical, or cosmetic compositions includes: a plate-shaped carrier element which includes through-holes; receptacles including each a longitudinal direction, a first end, a second end, and a receptacle wall which partially encloses a receptacle interior and forms a wall body, the wall body: extending in the longitudinal direction through a respective one of the through-holes; and including a first opening at the first end, a second opening at the opposite second end, a first edge, and a second edge, the first opening being laterally directly surrounded by the at least one first edge, the second opening being laterally directly surrounded by the second edge, at least 50% of respective ones of the receptacles having a total height R.sub.t of a roughness profile of the first edge and/or the second edge which is not more than 0.50 mm.
Claims
1. A holding device for holding a plurality of primary packaging containers for pharmaceutical, medical, or cosmetic compositions, the holding device comprising: a plate-shaped carrier element which includes a plurality of through-holes; a plurality of receptacles, each of which is configured for accommodating a respective one of the plurality of primary packaging containers, each of the plurality of receptacles including a longitudinal direction, a first end, a second end, and a receptacle wall which partially encloses a receptacle interior and forms a wall body, the wall body: extending in the longitudinal direction through a respective one of the plurality of through-holes; and including a first opening at the first end, a second opening at the second end which, in the longitudinal direction, is opposite to the first end, at least one first edge, and at least one second edge, the first opening of the wall body being laterally directly surrounded by the at least one first edge, the second opening of the wall body being laterally directly surrounded by the at least one second edge, at least 50% of respective ones of the plurality of receptacles having a total height R.sub.t of a roughness profile of at least one of the at least one first edge and the at least one second edge which is not more than 0.50 mm.
2. The holding device according to claim 1, wherein, for each of the plurality of receptacles, the wall body has: an interior surface which faces the receptacle interior; and an exterior surface which faces opposite to the interior surface.
3. The holding device according to claim 2, wherein, for each of the plurality of receptacles, the wall body includes at least one intermediate surface which (a) is neither part of the interior surface nor of the exterior surface, and (b) faces in the longitudinal direction or in a counter-direction of the longitudinal direction, wherein at least 50% of respective ones of the plurality of receptacles have a maximum total height R.sub.t of a roughness profile of the at least one intermediate surface of not more than 0.50 mm.
4. The holding device according to claim 3, wherein the maximum total height R.sub.t of the roughness profile of the at least one intermediate surface is not more than 0.30 mm.
5. The holding device according to claim 3, wherein the maximum total height R.sub.t of the roughness profile of the at least one intermediate surface is not more than 0.10 mm.
6. The holding device according to claim 1, wherein the total height R.sub.t of the roughness profile of at least one of the at least one first edge and the at least one second edge is not more than 0.40 mm.
7. The holding device according to claim 1, wherein the total height R.sub.t of the roughness profile of at least one of the at least one first edge and the at least one second edge is not more than 0.30 mm.
8. The holding device according to claim 1, wherein the total height R.sub.t of the roughness profile of at least one of the at least one first edge and the at least one second edge is not more than 0.20 mm.
9. The holding device according to claim 1, wherein the total height R.sub.t of the roughness profile of at least one of the at least one first edge and the at least one second edge is not more than 0.10 mm.
10. The holding device according to claim 1, wherein at least 60% of respective ones of the plurality of receptacles have the total height R.sub.t of the roughness profile of the at least one first edge.
11. The holding device according to claim 1, wherein at least 70% of respective ones of the plurality of receptacles have the total height R.sub.t of the roughness profile of the at least one first edge.
12. The holding device according to claim 1, wherein at least 80% of respective ones of the plurality of receptacles have the total height R.sub.t of the roughness profile of the at least one first edge.
13. The holding device according to claim 1, wherein at least 90% of respective ones of the plurality of receptacles have the total height R.sub.t of the roughness profile of the at least one first edge.
14. A holding device according to claim 1, wherein, for each of the plurality of receptacles, the wall body has an interior surface which faces the receptacle interior and an exterior surface which faces opposite to the interior surface, and at least 50% of respective ones of the plurality of receptacles have a maximum total height R.sub.t of a roughness profile of the interior surface which is not more than 0.50 mm.
15. The holding device according to claim 1, wherein, for each of the plurality of receptacles, the wall body includes a retaining part which extends laterally, limits the receptacle interior in the longitudinal direction or in a counter-direction of the longitudinal direction, and includes the first opening or the second opening.
16. The holding device according to claim 15, wherein the retaining part includes a lateral surface, wherein, for each of the plurality of receptacles, the first opening or the second opening is laterally limited by the lateral surface of the retaining part, wherein at least 50% of respective ones of the plurality of receptacles have a maximum total height R.sub.t of a roughness profile of the lateral surface of the retaining part of not more than 0.50 mm.
17. The holding device according to claim 16, wherein the maximum total height R.sub.t of the roughness profile of the lateral surface of the retaining part is not more than 0.30 mm.
18. The holding device according to claim 16, wherein the maximum total height R.sub.t of the roughness profile of the lateral surface of the retaining part is not more than 0.10 mm.
19. The holding device according to claim 1, wherein the plurality of primary packaging containers are selected from the group consisting of: vials; syringes; cartridges; ampoules; or a combination of at least two thereof.
20. A transport unit, comprising: an arrangement including: a holding device for holding a plurality of primary packaging containers for pharmaceutical, medical, or cosmetic compositions, the holding device comprising: a plate-shaped carrier element which includes a plurality of through-holes; a plurality of receptacles, each of which is configured for accommodating a respective one of the plurality of primary packaging containers, each of the plurality of receptacles including a longitudinal direction, a first end, a second end, and a receptacle wall which partially encloses a receptacle interior and forms a wall body, the wall body: extending in the longitudinal direction through a respective one of the plurality of through-holes; and including a first opening at the first end, a second opening at the second end which, in the longitudinal direction, is opposite to the first end, at least one first edge, and at least one second edge, the first opening of the wall body being laterally directly surrounded by the at least one first edge, the second opening of the wall body being laterally directly surrounded by the at least one second edge, at least 50% of respective ones of the plurality of receptacles having a total height R.sub.t of a roughness profile of at least one of the at least one first edge and the at least one second edge which is not more than 0.50 mm; the plurality of primary packaging containers, each of which is accommodated respectively in one of the plurality of receptacles; and a secondary packaging container, the holding device and the plurality of primary packaging containers being arranged completely in the secondary packaging container.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0220] The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention will be better understood by reference to the following description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein:
[0221] FIG. 1 shows a scheme of a holding device according to the present invention from above;
[0222] FIG. 2 shows a scheme of the holding device in FIG. 1 from below;
[0223] FIG. 3 shows a scheme of a transport unit according to the invention;
[0224] FIG. 4 shows a section through a transport unit according to the invention;
[0225] FIG. 5 shows a scheme of a primary packaging container;
[0226] FIG. 6 shows a scheme of a further primary packaging container;
[0227] FIG. 7 shows a flow-chart of a process of producing a holding device according to the invention;
[0228] FIG. 8 shows a scheme of a section through a receptacle of the holding device of FIG. 4;
[0229] FIG. 9A shows a further scheme of the section through the receptacle in FIG. 8;
[0230] FIG. 9B shows a scheme of a transversal section in the transversal plane in
[0231] FIG. 9A;
[0232] FIG. 10 shows a scheme of a section through a further receptacle of a holding device according to the invention;
[0233] FIG. 11 shows a scheme of a section through a further receptacle of a holding device according to the invention;
[0234] FIG. 12 shows a scheme of a section through a further receptacle of a holding device according to the invention;
[0235] FIG. 13 shows a scheme of a section through a further receptacle of a holding device according to the invention;
[0236] FIG. 14A shows a scheme of a section through part of a receptacle of a holding device according to the invention;
[0237] FIG. 14B shows a scheme of a section through part of a further receptacle of a holding device according to the invention;
[0238] FIG. 15 shows an optical microscope image of a burr on an edge of a receptacle;
[0239] FIG. 16A shows a photograph of a syringe of the comparative example after transport simulation;
[0240] FIG. 16B shows a photograph of a syringe of the example 4 after transport simulation;
[0241] FIG. 17A illustrates determination of the total height R.sub.t of a roughness profile of an interior surface in each transversal section;
[0242] FIG. 17B illustrates determination of the total height R.sub.t of a roughness profile of a lateral surface of a retaining part in each transversal section; and
[0243] FIG. 17C illustrates determination of each roughness profile of an intermediate surface.
[0244] Corresponding reference characters indicate corresponding parts throughout the several views. The exemplification set out herein illustrate embodiments of the invention, and such exemplifications are not to be construed as limiting the scope of the invention in any manner.
DETAILED DESCRIPTION OF THE INVENTION
[0245] FIG. 1 shows a scheme of a holding device 100, according to the invention, for holding a plurality of primary packaging containers 304 for pharmaceutical, medical or cosmetic compositions. The holding device 100 is shown from above. It has been prepared from polylpropylene by injection molding. The holding device 100 includes a plate-shaped carrier element 101 which includes a plurality of through-holes 102. The term “plate-shaped” refers to a width 113 and a length 112 of the plate-shaped carrier element 101 being more than 50 times a thickness of the carrier element. Here, the thickness is 1 mm. Further, the holding device 100 includes a plurality of receptacles 103, each of which is designed and arranged to accommodate one of the primary packaging containers 304. Each of the receptacles 103 includes a receptacle wall 104 which partially encloses a receptacle interior 105. Each receptacle wall 104 forms a wall body which extends in a longitudinal direction 106 through one of the through-holes 102 of the plurality of through-holes 102. Here, the wall bodies are hollow cylinders. For each of the receptacles 103, the wall body has an interior surface 110, which faces the receptacle interior 105, and an exterior surface 111 which faces opposite to the interior surface 110. Further, each wall body has a first opening 107 at a first end 108. The first opening 107 of each wall body is laterally directly surrounded by a first edge 109 of the respective wall body. Each of the receptacles 103 has a total height R.sub.t of a roughness profile of its first edge 109 of not more than 0.5 mm.
[0246] FIG. 2 shows a scheme of the holding device 100 in FIG. 1 from below. In this view, it can be seen that each wall body, additionally, has a further opening 201 at a further end 202 which, in the longitudinal direction 106, is opposite to the first end 108 (see FIG. 1). Each further opening 201 is laterally directly surrounded by at least one further edge 203 of the respective wall body. Each of the receptacles 103 has a total height R.sub.t of a roughness profile of its further edge 203 of not more than 0.5 mm.
[0247] FIG. 3 shows a scheme of a transport unit 300 according to the invention. The transport unit 300 includes an arrangement 301 according to the invention and a secondary packaging container 302. The latter is a tub which has been prepared from plastics by deep-drawing. The tub was closed with a gas-permeable lid 303 which was joined to the tub but has partially been peeled off to reveal the arrangement 301 inside the tub. The arrangement 301 includes a holding device 100 according to the invention and a plurality of primary packaging containers 304, each of which is accommodated in one of the receptacles 103 of the holding device 100.
[0248] FIG. 4 shows a section through a transport unit 300 according to the invention. This transport unit 300 also includes an arrangement 301 according to the invention and a secondary packaging container 302 which is a tub. The latter has been prepared from plastics by deep-drawing. The arrangement 301 includes a holding device 100 according to the invention and a plurality of primary packaging containers 304, each of which is accommodated in one of the receptacles 103 of the holding device 100. Here, the primary packaging containers 304 are syringes. The holding device 100 has been prepared from plastics by injection molding.
[0249] FIG. 5 shows a scheme of a primary packaging container 304 which is a TopPac® 5 ml lg type syringe from Schott AG. The syringe 101 includes a container wall 505 which partially surrounds a container interior 506. The container wall 505 is made from a cyclic olefin copolymer (COC) and forms, in the following sequence from top to bottom (based on the syringe itself and from right to left in the figure), a first end part 501, including a discharge orifice 504; a body part 502; and a further end part 503. The body part 502, which in the art is also referred to as barrel, is a hollow cylinder. The further end part 503 includes a further orifice 510. The discharge orifice 504 has an orifice area which is less than an orifice area of the further orifice 510. The further orifice 510 accommodates a plunger 511. The further end part 503 further includes a rim 509, in the art also referred to as a flange, which projects laterally from beyond the body part 502 and hems the further orifice 510. The container wall 505 is made from a cyclic olefin copolymer. The first end part 501 includes a connecting element which is a male part 507 of a Luer taper. The connecting element includes a thread for connecting a hypodermic needle to the syringe. The thread is arranged in a sleeve. The syringes of the arrangements 301 in FIGS. 4, 8 and 10 to 13 are syringes of the type shown in FIG. 5, however, without the plunger 511.
[0250] FIG. 6 shows a scheme of a further primary packaging container 304 which is a vial. The latter includes a container wall 505 which partially surrounds a container interior 506. The container wall 505 forms, in the following sequence from top to bottom, a first end part 501, including a discharge orifice 504; a body part 502; and a further end part 503. The body part 502 is a hollow cylinder. The further end part 503 includes a standing base 605. Besides the discharge orifice 504, the first end part 501 includes a flange 601 and a neck 602. The body part 502 follows the first end part 501 via a shoulder 603. The further end part 503 follows the body part 502 via a heel 604. The container wall 505 is made from type I borosilicate glass.
[0251] FIG. 7 shows a flow-chart of a process 700 of producing a holding device 100 according to the invention by injection molding. The process 700 includes process steps of: a) 701 providing a first part of a mold and a further part of the mold; b) 702 positioning the first part and the further part relative to one another such that the first part and the further part together at least partially enclose an interior of the mold; c) 703 introducing a polymer melt into the interior of the mold; d) 704 solidifying the polymer melt in the interior of the mold, thereby obtaining a molded body; and e) 705 demolding the molded body.
[0252] FIG. 8 shows a scheme of a section through a receptacle 103 of the holding device 100 of FIG. 4. Here, only part of the holding device 100 is shown. Accordingly, only part of the plate-shaped carrier element 101 is shown. A primary packaging container 304, which is a syringe of the type as shown in FIG. 5, is accommodated in the receptacle 103. The receptacle 103 includes a receptacle wall 104 which partially encloses a receptacle interior 105. The receptacle wall 104 forms a wall body which extends in a longitudinal direction 106. The lateral directions 801 are perpendicular to the longitudinal direction 106.
[0253] The wall body has an interior surface 110, which faces the receptacle interior 105, and an exterior surface 111 which faces opposite to the interior surface 110. Further, the wall body has a first opening 107 at a first end 108. The first opening 107 is laterally directly surrounded by exactly one first edge 109 of the wall body. Here, the first edge 109 is the inner edge of receptacle wall 104 at the first end 108. A total height R.sub.t of a roughness profile of the first edge 109 is not more than 0.05 mm. This holds for at least 90% of the receptacles 103 of the holding device 100 of the arrangement 301 in FIG. 4. Furthermore, the wall body has a further opening 201 at a further end 202 which, in the longitudinal direction 106, is opposite to the first end 108. The further opening 201 is laterally directly surrounded by exactly one further edge 203 of the wall body. Here, the further edge 203 is the inner edge of receptacle wall 104 at the further end 202. A total height R.sub.t of a roughness profile of the further edge 203 is also not more than 0.05 mm. This also holds for at least 90% of the receptacles 103 of the holding device 100 of the arrangement 301 in FIG. 4.
[0254] FIG. 9A shows a further scheme of the receptacle 103 in FIG. 8. This scheme lacks the syringe from FIG. 8. The wall body of the receptacle 103 has 2 intermediate surfaces 901 which are neither part of the interior surface 110 nor of the exterior surface 111. One of intermediate surfaces 901 faces in the longitudinal direction 106 and the other in the counter direction of the longitudinal direction 106. The intermediate surface 901 at the first end 108 is located between the first edge 109 and the outer edge of receptacle wall 104 at the first end 108. The intermediate surface 901 at the further end 202 is located between the further edge 203 and the outer edge of receptacle wall 104 at the further end 202. For each of the 2 intermediate surfaces 901, the roughness profiles have a maximum total height R.sub.t of not more than 0.050 mm. This is true for at least 90% of the receptacles 103 of the holding device 100 of the arrangement 301 in FIG. 4. A dashed line in FIG. 9A depicts a plane 902 of the transversal section 904 through the receptacle 103 which is shown in FIG. 9B. This transversal section 904 is exemplary of all the transversal sections 904 through the receptacle 103 which includes a part of the interior surface 110. The wall body is axially symmetric around a central longitudinal axis 903. Accordingly, the first 107 and further openings 201 are circular, and the first 109 and further edges 203 are circle lines (see also FIG. 9B).
[0255] FIG. 9B shows a scheme of an exemplary transversal section 904 through the receptacle 103 in FIG. 9A. The maximum total height R.sub.t of roughness profiles of the interior surface 110 is not more than 0.070 mm. This holds for at least 80% of the receptacles 103 of the holding device 100 of the arrangement 301 in FIG. 4.
[0256] FIG. 10 shows a scheme of a further receptacle 103 of a holding device 100 according to the invention. Just as in FIG. 8, only part of the holding device 100 and only part of the plate-shaped carrier element 101 is shown. A primary packaging container 304, which is a syringe of the type as shown in FIG. 5, is accommodated in the receptacle 103. The receptacle 103 in FIG. 10 is designed as the one in FIG. 8, however, in FIG. 10 the receptacle wall 104 has a further edge 203, but no outer edge at the further end 202. This is because the further end 202 is flush with the plate-shaped carrier element 101.
[0257] FIG. 11 shows a scheme of a further receptacle 103 of a holding device 100 according to the invention. Just as in FIG. 8, only part of the holding device 100 and only part of the plate-shaped carrier element 101 is shown. A primary packaging container 304, which is a syringe of the type as shown in FIG. 5, is accommodated in the receptacle 103. The receptacle 103 in FIG. 11 is designed as the one in FIG. 8, however, in FIG. 11 the wall body includes a retaining part 1101. The latter extends laterally, i.e., in the lateral directions 801, and limits the receptacle interior 105 in the longitudinal direction 106. Further, the retaining part 1101 includes the further opening 201. In consequence, the receptacle has 2 further edges 203. Those are the upper and lower edges of a lateral surface 1102 of the retaining part 1101. The lateral surface 1102 directly surrounds the further opening 201. The maximum total height R.sub.t of roughness profiles of the lateral surface 1102 is not more than 0.050 mm.
[0258] FIG. 12 shows a scheme of a further receptacle 103 of a holding device 100 according to the invention. Just as in FIG. 11, only part of the holding device 100 and only part of the plate-shaped carrier element 101 is shown. A primary packaging container 304, which is a syringe of the type as shown in FIG. 5, is accommodated in the receptacle 103. The receptacle 103 in FIG. 12 is designed as the one in FIG. 11, however, in FIG. 12 the receptacle wall 104 has a first edge 109, but no outer edge at the first end 108. This is because the first end 108 is flush with the plate-shaped carrier element 101.
[0259] FIG. 13 shows a scheme of a further receptacle 103 of a holding device 100 according to the invention. Just as in FIG. 12, only part of the holding device 100 and only part of the plate-shaped carrier element 101 is shown. A primary packaging container 304, which is a syringe of the type as shown in FIG. 5, is accommodated in the receptacle 103. The general design of the receptacle 103 in FIG. 13 is the same as in FIG. 11, however, upside-down.
[0260] FIG. 14A shows a scheme of a section through part of a receptacle 103 of a holding device 100 according to the invention. More specifically, FIG. 14A shows the first end 108 of the wall body of the receptacle in FIG. 8. Here, the syringe is not shown. This figure is meant to provide a closer view on the position of the first edge 109 and the intermediate surface 901.
[0261] FIG. 14B shows a scheme of a section through part of a receptacle 103 of a holding device 100 according to the invention. More specifically, FIG. 14B shows the first end 108 of the wall body of the receptacle in FIG. 2. Here, the syringe is not shown. This figure is meant to provide a closer view on the position of the first edge 109 and the intermediate surface 901.
[0262] FIG. 15 shows an optical microscope image 1500 of a burr 1501 on an edge of a receptacle. The height of the burr 1501 is 146.009 μm. This burr 1501 is the highest site on this edge. Further, the height of the burr 1501 is much more than any valley on the roughness profile of the edge. Accordingly, the total height R.sub.t of the roughness profile of the edge with the burr 1501 is only slightly above 146 μm.
[0263] FIG. 16A shows a photograph of a primary packaging container 304. The latter is a syringe of the comparative example after transport simulation. Clearly, many macroscopic particles are present on the exterior surface of the container wall 505. At the bottom of FIG. 16A the rim 509 and the further orifice 510 of the syringe can be seen.
[0264] FIG. 16B shows a photograph of a further primary packaging container 304. This one is a syringe of the example 4 after transport simulation. In comparison to FIG. 16A, much less particles can be seen on the exterior surface of the container wall 505.
[0265] FIG. 17A illustrates determination of the maximum total height R.sub.t of roughness profiles of an interior surface 110 of a cylindrical receptacle. The interior surface 110 is fully covered with a grid of imaginary lines 1701 of a first multitude of equidistant lines and imaginary lines 1702 of a second multitude of equidistant lines. Two neighbouring equidistant lines have a distance 1703. R.sub.t-values of each of the roughness profiles along the lines 1701 of the first multitude of equidistant lines and the lines 1702 of the second multitude of equidistant lines are determined. The maximum of these R.sub.t-values is the maximum total height R.sub.t of roughness profiles of the interior surface 110.
[0266] FIG. 17B illustrates determination of the maximum total height R.sub.t of roughness profiles of a lateral surface 1102 of a retaining part 1101. The retaining part 1101 has the shape of a hollow cylinder. Such a retaining part 1101 can be seen in FIG. 12. The lateral surface 1102 of the retaining part 1101 is the interior surface of the hollow cylinder. Thus, the lateral surface 1102 is cylindrical. The lateral surface 1102 is fully covered with a grid of imaginary lines 1701 of a first multitude of equidistant lines and imaginary lines 1702 of a second multitude of equidistant lines. Two neighbouring equidistant lines have a distance 1703. R.sub.t-values of each of the roughness profiles along the lines 1701 of the first multitude of equidistant lines and the lines 1702 of the second multitude of equidistant lines are determined. The maximum of these R.sub.t-values is the maximum total height R.sub.t of roughness profiles of the lateral surface 1102 of the retaining part 1101.
[0267] FIG. 17C illustrates determination of the maximum total height R.sub.t of roughness profiles of an intermediate surface 901. Such intermediate surfaces 901 can be seen at the first end 108 and the further end 202 of the receptacle 103 as shown in FIG. 9A. Those intermediate surfaces 901 are of the shape of an annulus. In FIG. 17C, the intermediate surface 901 surrounds the receptacle interior 105. The intermediate surface 901 is fully covered with a rectangular grid of imaginary lines 1701 of a first multitude of equidistant lines and imaginary lines 1702 of a second multitude of equidistant lines. Two neighbouring equidistant lines have a distance 1703. For each of the lines 1701 and 1702, the total height R.sub.t of the roughness profile along this line is determined. The maximum of these R.sub.t-values is the maximum total height R.sub.t of roughness profiles of the intermediate surface 901.
LIST OF REFERENCE NUMERALS
[0268] 100 holding device according to the invention [0269] 101 plate-shaped carrier element [0270] 102 through-hole [0271] 103 receptacle [0272] 104 receptacle wall [0273] 105 receptacle interior [0274] 106 longitudinal direction [0275] 107 first opening [0276] 108 first end [0277] 109 first edge [0278] 110 interior surface [0279] 111 exterior surface [0280] 112 length [0281] 113 width [0282] 201 further opening [0283] 202 further end [0284] 203 further edge [0285] 300 transport unit according to the invention [0286] 301 arrangement according to the invention [0287] 302 secondary packaging container [0288] 303 lid [0289] 304 primary packaging container [0290] 501 first end part [0291] 502 body part [0292] 503 further end part [0293] 504 discharge orifice [0294] 505 container wall [0295] 506 container interior [0296] 507 male part of Luer taper [0297] 508 stopper [0298] 509 rim [0299] 510 further orifice [0300] 511 plunger [0301] 601 flange [0302] 602 neck [0303] 603 shoulder [0304] 604 heel [0305] 605 standing base [0306] 700 process of producing the holding device according to the invention [0307] 701 process step a) [0308] 702 process step b) [0309] 703 process step c) [0310] 704 process step d) [0311] 705 process step e) [0312] 801 lateral directions [0313] 901 intermediate surface [0314] 902 plane of transversal section [0315] 903 central longitudinal axis [0316] 904 transversal section [0317] 1101 retaining part [0318] 1102 lateral surface [0319] 1500 optical microscope image [0320] 1501 burr [0321] 1701 lines of first multitude of equidistant lines [0322] 1702 lines of second multitude of equidistant lines [0323] 1703 distance between neighbouring equidistant lines
[0324] While this invention has been described with respect to at least one embodiment, the present invention can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.
