Can lid cross-section production

Abstract

A parametric representation of a can lid (e.g., a can lid for an aluminum can) can be provided. For example, the parametric representation may include a series of arc segments connected end-to-end. This series of arc segments may span between the end of the center plate and the edge of the can lid. Based on the parametric representation, a set of can lid profiles with different parameter values ​​(such as arc segments differing in combinations of arc angles and radii) can be generated. This set of profiles can be evaluated according to standards (such as buckling pressure and quality standards). A can lid profile can be selected from this set based on performance relative to the standards. For example, the selected profile may include a countersunk groove radius with a specific threshold or range. The selected can lid profile can be formed into a can lid.

Description

Citation of relevant applications

[0001] This application claims the benefit of U.S. Provisional Patent Application No. 63 / 622,730, filed January 19, 2024, and U.S. Provisional Patent Application No. 63 / 557,710, filed February 26, 2024, each of which is incorporated herein by reference in its entirety for all purposes. Technical Field

[0002] This application relates to metal containers, and more specifically, to systems and methods for producing metal can lids that can be joined with a container body to form a metal container. Background Technology

[0003] Metal containers (such as those used to hold food or beverages, e.g., aluminum beverage cans) typically comprise a container body with an opening defined in one end, and a closure (called a "container lid" or "can lid") designed to close the opening of the container body. The container body and can lid are typically joined at their peripheries (e.g., by pressing or rolling together, also known as roll sealing) to form a liquid-tight and airtight joint. While some container lids may be formed from a component that begins as a flat, round sheet, container lids more commonly feature raised, shaped, or rolled peripheral edges that facilitate the joining process.

[0004] Can lid forming processes typically involve positioning a sheet metal blank between a pair of dies, which are moved to shear the edges of the blank. A punch then descends to draw the now-rounded blank into a can lid with a peripheral flange, frustoconical walls, and end plates. The peripheral flange of the can lid can be drawn down to form a peripheral lip suitable for double-sealing operations. Subsequent machining can create a countersunk groove with a flat or arched center plate. Such processes can be performed by a single tooling assembly or multiple tooling assemblies. Summary of the Invention

[0005] The embodiments covered by this patent are defined by the following claims, not by the content of this invention. The content of this invention is a high-level generalization of various embodiments and introduces some concepts that will be further described in the following detailed description section. The content of this invention is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used alone to define the scope of the claimed subject matter. This subject matter should be understood by referring to the appropriate portions of the entire specification of this patent, any or all of the drawings, and each claim.

[0006] According to some embodiments, the can lid includes a center plate and an annular shaped portion defining the edge of the can lid. The annular shaped portion may include an inner wall, a countersunk groove, a chuck wall, and a crown. The height of the center plate may be at least 2.000 mm, the total height of the shaped portion may be at least 5.524 mm, the internal contour offset of the shaped portion may be at least 5.302 mm, and the countersunk groove radius may be at least 0.290 mm.

[0007] According to some embodiments, the can lid includes a center plate and an annular shaped portion defining the edge of the can lid. The annular shaped portion may include an inner wall, a countersunk groove, a chuck wall, and a crown. The countersunk groove radius may be the radius of an arc segment existing at the lower end or inflection point of the countersunk groove. The countersunk groove radius may be from 0.290 mm to 0.650 mm.

[0008] The various embodiments described herein may include additional systems, methods, features, and advantages that are not necessarily explicitly disclosed herein, but will be apparent to those skilled in the art upon review of the following detailed description and accompanying drawings. All such systems, methods, features, and advantages are intended to be included within this disclosure and protected by the appended claims. Attached Figure Description

[0009] Figure 1 A portion of a can lid formed by a can lid forming system according to some embodiments is shown.

[0010] Figure 2 and Figure 3 Each is a flowchart illustrating a method for producing can lids according to some implementation schemes.

[0011] Figure 4 An example of a parametric representation of a can lid having a series of arc segments connected end to end, according to some embodiments, is shown.

[0012] Figure 5 This is a chart showing example outputs of an evaluation of a set of can lid profiles based on buckling pressure and quality standards according to some implementation schemes.

[0013] Figure 6 A portion of a can lid with specified values ​​for a series of arcs connected end to end, according to some embodiments, is shown.

[0014] Figure 7 An example of a set of specified values ​​for a series of arc segments connected end to end to define a can lid is shown, according to some implementation schemes.

[0015] Figure 8 A portion of a can lid with specified values ​​for a series of arcs connected end to end, according to some embodiments, is shown.

[0016] Figure 9 An example of a set of specified values ​​for a series of arc segments connected end to end to define a can lid is shown, according to some implementation schemes.

[0017] Figure 10 Another example is shown, according to some implementations, of a set of specified values ​​for a series of arcs connected end to end to define a can lid.

[0018] Figure 11 This is a simplified schematic diagram illustrating examples of control aspects of systems that can be implemented for the production of can lids, according to various examples.

[0019] Figure 12 A portion of a can lid with specified values ​​for a series of arcs connected end to end, according to some embodiments, is shown.

[0020] Figure 13 Another example is shown, according to some implementations, of a set of specified values ​​for a series of arcs connected end to end to define a can lid.

[0021] Figure 14 An example of a set of specified values ​​for a series of arc segments connected end to end to define a can lid is shown, according to some implementation schemes.

[0022] Figure 15 Examples of several possible can lid outlines according to some implementation schemes are shown.

[0023] Figure 16 This illustrates, according to some implementation schemes, the possibility of targeting from Figure 15 An example of a set of specified values ​​for a series of arc segments connected end to end in the outline.

[0024] Figure 17 This illustrates, according to some implementation schemes, the possibility of targeting from Figure 15 An example of a set of additional values ​​implemented by the outline.

[0025] Figure 18 This demonstrates compatibility according to some implementation schemes. Figure 15 A chart showing some of the parameters related to the contour. Detailed Implementation

[0026] This document describes systems and methods for producing can lids for metal containers (such as, but not limited to, beverage cans, food cans, aerosol cans, and / or any other desired containers). In some embodiments, a parametric representation of the can lid (e.g., a can lid for an aluminum can) can be provided. For example, the parametric representation may include a series of arc segments connected end to end. The series of arc segments may span between the end of a center plate and the edge of the can lid. Based on the parametric representation, a set of can lid profiles with different parameter values ​​(such as arc segments differing in combinations of arc segment lengths (or arc segment angles) and radii) can be generated. This set can be evaluated according to standards (such as resistance to metal exposure, buckling pressure, resistance to clamshell failure, and / or quality standards). The can lid profile can be selected from this set based on performance relative to the standards. The selected can lid profile can be formed into a can lid. This parametric representation allows for the development of new can lid profiles that can meet standards for metal exposure resistance, buckling strength, clamshell failure resistance, quality, and / or other criteria using materials with lower strength (or other properties) compared to other commonly used materials and / or reduced dimensions (and corresponding material usage) compared to conventional can lid designs such as the B64 and CDL types. In some embodiments, the systems and methods described herein allow for the use of softer materials in can lid manufacturing compared to conventional can lid designs such as the B64 and CDL types. As a non-limiting example, while conventional can lid manufacturing for the B64 or CDL types utilizes 5xxx series aluminum alloys, such as, but not limited to, AA5182, the systems and methods described herein allow for the use of 3xxx series aluminum alloys with higher recycled content, such as, but not limited to, AA3104. The systems and methods described herein are applicable to can lids of various diameters. As a non-limiting example, the systems and methods described herein can be applied to can lids referred to as 200 can lids, 202 can lids (i.e., diameter 2” + 2 / 16”), 204 can lids (i.e., diameter 2” + 4 / 16”), can lids with can openings of different diameters, and / or can lids of different sizes, etc. Various other benefits and advantages can be achieved using the systems and methods described herein, and these benefits and advantages should not be considered limiting.

[0027] Figure 1 An example of a can lid 101 formed from a metal sheet by a can lid forming system according to an embodiment is shown. Figure 1 As shown, the can lid 101 typically includes a center plate 103 and an irregularly shaped portion 105. Although shown as a cross-sectional view, it should be understood that the can lid 101 is generally circular; therefore, the components of the can lid 101 can be generally annular or circular.

[0028] In some implementation schemes, and as such Figure 1As shown, the shape of the center plate 103 can be substantially planar (e.g., having a radius of curvature of 0). In other embodiments, the center plate 103 may include other shapes or profiles, such as, but not limited to, gentle arcs or other geometries. As a non-limiting example, the center of the center plate 103 may be slightly raised and include an annular portion extending to the inner wall 111.

[0029] The irregular portion 105 may extend from the center plate 103 to the outer end or end 107 of the lid 101. For example, the end 107 may correspond to the edge 109. The irregular portion 105 may include any number of components. In some embodiments, and as... Figure 1 As shown, the irregular portion 105 may include an inner wall 111, a countersunk groove 113, a chuck wall 115, and a crown 117, but may utilize any combination of more, fewer, or different elements.

[0030] The inner wall 111 of the irregular portion 105 extends from the center plate 103 toward and / or into the countersunk groove 113, and the countersunk groove 113 may define the lower end of the can lid 101. The chuck wall 115 may extend from the countersunk groove 113 to the crown 117. (Example...) Figure 1 As shown, the crown 117 typically includes an inner wall 121, a top wall 123, and an outer wall 125, wherein the outer wall 125 includes the edge 109 of the lid 101. In various embodiments, the crown 117 and / or the end 107 may be curled. The top wall 123 of the crown 117 typically defines the upper end of the lid 101, and is described below. Figure 12 The distance from the top end (defined by the top wall 123) to the bottom end (defined by the countersunk groove 113), as discussed in detail, can define the total height of the can lid 101.

[0031] Figure 1 The specific can lid 101 shown should not be considered limiting, and in other embodiments, the can lid 101 (and its sub-parts) may have various shapes, profiles, and / or portions as needed. In some embodiments, and as referenced below... Figure 12 As discussed in detail herein, the improved can lid 101 may include dimensions, profiles, and / or relative dimensions and / or profiles that provide improved performance. The two-dimensional cross-section of the can lid 101 (such as, but not limited to,...) Figure 1 The two-dimensional cross-section shown can be rotated about the vertical axis 119 to form a symmetrical three-dimensional shape of the can lid 101 in use. As discussed in more detail below, in some embodiments, a parametric shape for the irregular portion 105 can be generated and implemented to meet specified criteria.

[0032] Improved can lid profile like Figure 4 and Figure 12As shown, the improved can lids described herein are characterized by various sizes, profiles, and / or relative sizes and / or profiles. Although can lids 401 and 1201 are mentioned, the following description applies to can lids consistent with this disclosure.

[0033] In some implementation schemes, and as such Figure 4 and Figure 12 As shown, the improved can lid described in this paper can be characterized as a series of arc segments.

[0034] refer to Figure 4 For example, can lid 401 is shown having a center plate 403, a shaped portion 405, an end 407, and an edge 409, which may be an example of a center plate 103, a shaped portion 105, an end 107, and an edge 109.

[0035] The centerline 410 may extend through the center plate 403 and the irregular portion 405. The centerline 410 may include a series of arc segments A1-A n A series of arc segments A1-A n exist Figure 4 The center plate is fully displayed within the irregularly shaped portion 405 (e.g., the center plate 403 terminates at a series of arc segments A1-A). n (At or before the starting position). However, in some implementations, a series of arc segments A1-A n It may extend at least partially into the center plate 403, and / or at least a portion of the center plate 403 may be included in a series of arc segments A1-A n In the middle (e.g., such that at least a portion of the center plate 403 can be curved). For example, a series of arc segments A1-A n It may include an initial (or first) arc segment A1, zero or one or more intermediate arc segments A i and final arc segment A n A series of arc segments A1-A n It may span across the end of the center plate 403 (e.g., P0) and the end 407 and / or edge 409 of the lid 401 (e.g., P). n Between. The number of arc segments in the irregular part 405 (e.g., final arc segment A) n The "n" in the name and / or shape can vary to provide different contours, for example, producing geometric shapes that can be arbitrarily complex or simple. Therefore, the irregular portion 405 is represented as a series of arc segments A1-A n It allows for the evaluation of contours with an arbitrary number of degrees of freedom, for example, to facilitate geometric optimization.

[0036] A series of arc segments A1-A nThey can be connected end-to-end. For example, the initial or first arc segment A1 may include a starting point P0 adjacent to the center plate 403 and may extend to an ending point P1 (e.g., the location where the second arc segment A2 may begin). The second arc segment A2 may extend to a corresponding second ending point P2 (e.g., the location where the third arc segment A3 may begin and extend to the third ending point P3). More generally, each intermediate arc segment A... i It may include the starting point P i-1 (For example, at this point, the arc segment A that immediately follows in the series) i-1 (can be terminated) and may include endpoint P i (For example, at this point, the subsequent arc segment A) i-1 (Can begin). Final arc A n Similarly, it can include the starting point P. n-1 (For example, in the series, the arc segment A that immediately follows) n-1 (at the end of the arc). Final arc segment A n It may include the endpoint P n The endpoint may coincide with end 407 and / or edge 409.

[0037] Arc segment A1-A n These can be circular arc segments. Each arc segment can have its own radius R and included angle θ. For example, the initial or first arc segment A1 is shown as having a radius R1 and an included angle θ1. A series of arc segments A1-A n Alternatively, it can be based on the normal vector relative to the center line 410. The impact is expressed as such. For example, as Figure 4 As shown, the normal vector at center plate 403 It can extend vertically or with a 0° orientation. Therefore, this 0° orientation can exist at P0 (e.g., the end point of the center plate 403 and the starting point of the initial or first arc segment A1). The radius R1 and included angle θ1 of the first arc segment A1 can impart a normal vector variation Δ over the length of the first arc segment A1. For example, making the normal vector Different orientations relative to the centerline 410 can exist at the endpoint P1 of the first arc segment A1. Therefore, the geometry of the first arc segment A1 can be represented by the radius R1 and the variation Δ of the normal vector along the length of the first arc segment A1. The function. Similarly, each intermediate arc segment A i It can be represented by its radius R i and in arc segment A i Change of normal vector Δ over length The function. Generally speaking, for a given arc segment A i The endpoint P i At that point, the normal vector The orientation can be based on arc segment A i Change of normal vector Δ over length Add the arc segment A that exists in front. i-1 The endpoint P i-1 Orientation of the normal vector at the location To determine. In contrast, at the opposite end of the can lid 401, the normal vector In the final arc segment A n The endpoint P n The angle (e.g., at end 407 or edge 409) can be 90°.

[0038] In some implementations, a series of arc segments A1-A n It may include at least one segment S that approximates a straight line (e.g., given a sufficiently large radius R combined with a sufficiently small included angle θ or normal vector change Δ). In some implementations, a series of arc segments A1-A n It can be provided without any straight approximation segment S and / or can consist only of arc segments or curved segments. For example, in some embodiments, a series of arc segments A1-A n It may include only the normal vector change Δ that exhibits at least 0.1°. The arc segment.

[0039] The number of arc segments used to characterize the can lid (e.g., can lid 401) should not be considered limiting. As a non-limiting example, and as... Figure 12 As shown, the can lid 1201 may include at least thirteen arc segments (identified as arc segments 1-13). Figure 12 In the implementation scheme, arc segments 1-4 can form an inner wall 111, arc segments 5-6 can form a countersunk groove 113, arc segments 7-10 can form a chuck wall 115, and arc segments 11-13 can form a crown 117.

[0040] In some embodiments, within manufacturing tolerances, arc segment 1 may have a radius size from about 0.412 mm to about 0.618 mm, such as from about 0.463 mm to about 0.566 mm, and / or such as from about 0.489 mm to about 0.540 mm. In a non-limiting example, arc segment 1 may have a radius of about 0.515 mm. In some embodiments, arc segment 1 may be at least 0.412 mm, such as at least 0.463 mm, and / or such as at least 0.489 mm. In various embodiments, within manufacturing tolerances, arc segment 1 may have a relative angle (or variation of normal orientation) from about 46.048° to about 30.229°, such as from about 40.689° to about 33.052°, and / or such as from about 38.460° to about 34.675°. In a non-limiting example, arc segment 1 may have a relative angle of about 36.468°. In some implementations, the relative angle of arc segment 1 may be less than 46.048°, such as less than 40.689°, and / or such as less than 38.460°.

[0041] In various embodiments, within manufacturing tolerances, arc segment 2 may have a radius ranging from about 58.776 mm to about 88.164 mm, such as from about 66.123 mm to about 80.817 mm, and / or such as from about 69.797 mm to about 77.144 mm. In a non-limiting example, arc segment 2 may have a radius of about 73.470 mm. In some embodiments, arc segment 2 may have a radius of at least 58.776, such as at least 66.123, and / or such as at least 69.797. In various embodiments, within manufacturing tolerances, arc segment 2 may have a relative angle (or variation in normal orientation) ranging from about 1.804° to about 1.203°, such as from about 1.604° to about 1.312°, and / or such as from about 1.519° to about 1.375°. In a non-limiting example, arc segment 2 may have a relative angle of about 1.443°. In some implementations, the relative angle of arc segment 2 may be less than 1.804°, such as less than 1.604°, and / or such as less than 1.519°.

[0042] In various embodiments, within manufacturing tolerances, arc segment 3 may have a radius ranging from about 0.502 mm to about 0.753 mm, such as from about 0.564 mm to about 0.690 mm, and / or such as from about 0.596 mm to about 0.658 mm. In a non-limiting example, arc segment 3 may have a radius of about 0.627 mm. In some embodiments, arc segment 3 may have a radius of at least 0.502 mm, such as at least 0.564 mm, and / or such as at least 0.596 mm. In some embodiments, within manufacturing tolerances, arc segment 3 may have a relative angle (or variation in normal orientation) ranging from about 39.607° to about 26.108°, such as from about 35.054° to about 28.529°, and / or such as from about 33.154° to about 29.918°. In a non-limiting example, arc segment 3 may have a relative angle of about 31.452°. In some implementations, the relative angle of arc segment 3 may be less than 39.607°, such as less than 35.054°, and / or such as less than 33.154°.

[0043] In some embodiments, within manufacturing tolerances, arc segment 4 may have a radius ranging from about 22.929 mm to about 34.393 mm, such as from about 25.795 mm to about 31.527 mm, and / or such as from about 27.228 mm to about 30.094 mm. In a non-limiting example, arc segment 4 may have a radius of about 28.661 mm. In some embodiments, arc segment 4 may have a radius of at least 22.929 mm, such as at least 25.795 mm, and / or such as at least 27.228 mm. In some embodiments, within manufacturing tolerances, arc segment 4 may have a relative angle (or variation in normal orientation) ranging from about 4.142° to about 2.761°, such as from about 3.682° to about 3.012°, and / or such as from about 3.488° to about 3.156°. In a non-limiting example, arc segment 4 may have a relative angle of about 3.313°. In some implementations, the relative angle of arc segment 4 may be less than 4.142°, such as less than 3.682°, and / or such as less than 3.488°.

[0044] In various embodiments, within manufacturing tolerances, arc segment 5 may have a radius ranging from about 0.381 mm to about 0.572 mm, such as from about 0.429 mm to about 0.524 mm, and / or such as from about 0.453 mm to about 0.501 mm. In a non-limiting example, arc segment 5 may have a radius of about 0.477 mm. In some embodiments, arc segment 5 may have a radius of at least 0.381 mm, such as at least 0.429 mm, and / or such as at least 0.453 mm. In some embodiments, within manufacturing tolerances, arc segment 5 may have a relative angle (or variation of normal orientation) ranging from about -100.514° to about -61.676°, such as from about -86.233° to about -68.003°, and / or such as from about -80.708° to about -71.725°. In a non-limiting example, arc segment 5 may have a relative angle of approximately -75.924°. In some embodiments, the relative angle of arc segment 5 may be less than -100.514°, such as less than -86.233°, and / or such as less than -80.708°.

[0045] In various embodiments, within manufacturing tolerances, arc segment 6 may have a radius ranging from about 0.163 mm to about 0.244 mm, such as from about 0.183 mm to about 0.224 mm, and / or such as from about 0.193 mm to about 0.213 mm. In a non-limiting example, arc segment 6 may have a radius of about 0.203 mm. In some embodiments, arc segment 6 may have a radius of at least 0.163 mm, such as at least 0.183 mm, and / or such as at least 0.193 mm. In some embodiments, within manufacturing tolerances, arc segment 6 may have a relative angle (or variation of normal orientation) ranging from about -107.030° to about -64.825°, such as from about -91.234° to about -71.569°, and / or such as from about -85.229° to about -75.553°. In a non-limiting example, arc segment 6 may have a relative angle of approximately -80.063°. In some embodiments, the relative angle of arc segment 6 may be less than -107.030°, such as less than -91.234°, and / or such as less than -85.229°.

[0046] In some embodiments, within manufacturing tolerances, arc segment 7 may have a radius ranging from about 205.641 mm to about 308.461 mm, such as from about 231.346 mm to about 282.756 mm, and / or such as from about 244.198 mm to about 269.903 mm. In a non-limiting example, arc segment 7 may have a radius of about 257.051 mm. In some embodiments, arc segment 7 may have a radius of at least 205.641 mm, such as at least 231.346 mm, and / or such as at least 244.298 mm. In some embodiments, within manufacturing tolerances, arc segment 7 may have a relative angle (or variation of normal orientation) ranging from about -0.301° to about -0.201°, such as from about -0.267° to about -0.219°, and / or such as from about -0.253° to about -0.229°. In a non-limiting example, arc segment 7 may have a relative angle of approximately -0.241°. In some embodiments, the relative angle of arc segment 7 may be less than -0.301°, such as less than -0.267°, and / or such as less than -0.253°.

[0047] In various embodiments, within manufacturing tolerances, arc segment 8 may have a radius ranging from about 2.210 mm to about 3.315 mm, such as from about 2.486 mm to about 3.039 mm, and / or such as from about 2.624 mm to about 2.900 mm. In a non-limiting example, arc segment 8 may have a radius of about 2.762 mm. In some embodiments, arc segment 8 may have a radius of at least 2.210 mm, such as at least 2.486 mm, and / or such as at least 2.624 mm. In some embodiments, within manufacturing tolerances, arc segment 8 may have a relative angle (or variation in normal orientation) ranging from about 63.449° to about 41.043°, such as from about 55.733° to about 44.968°, and / or such as from about 52.567° to about 47.236°. In a non-limiting example, arc segment 8 may have a relative angle of about 49.754°. In some implementations, the relative angle of arc segment 8 may be less than 73.449°, such as less than 55.733°, and / or such as less than 52.567°.

[0048] In some embodiments, within manufacturing tolerances, arc segment 9 may have a radius ranging from about 3.989 mm to about 5.983 mm, such as from about 4.487 mm to about 5.485 mm, and / or such as from about 4.737 mm to about 5.235 mm. In a non-limiting example, arc segment 9 may have a radius of about 4.986 mm. In some embodiments, arc segment 9 may have a radius of at least 3.989 mm, such as at least 4.487 mm, and / or such as at least 4.737 mm. In various embodiments, within manufacturing tolerances, arc segment 9 may have a relative angle (or variation of normal orientation) ranging from about -43.954° to about -28.894°, such as from about -38.860° to about -31.587°, and / or such as from about -36.739° to about -33.133°. In a non-limiting example, arc segment 9 may have a relative angle of approximately -34.841°. In some embodiments, the relative angle of arc segment 9 may be less than -43.954°, such as less than -38.860°, and / or such as less than -36.739°.

[0049] In various embodiments, within manufacturing tolerances, arc segment 10 may have a radius ranging from about 2.201 mm to about 3.302 mm, such as from about 2.477 mm to about 3.027 mm, and / or such as from about 2.614 mm to about 2.889 mm. In a non-limiting example, arc segment 10 may have a radius of about 2.752 mm. In some embodiments, arc segment 10 may have a radius of at least 2.201 mm, such as at least 2.477 mm, and / or at least 2.614 mm. In various embodiments, within manufacturing tolerances, arc segment 10 may have a relative angle (or variation in normal orientation) ranging from about 13.300° to about 8.856°, such as from about 11.817° to about 9.662°, and / or such as from about 11.193° to about 10.124°. In a non-limiting example, arc segment 10 may have a relative angle of about 10.631°. In some implementations, the relative angle of arc segment 10 may be less than 13.300°, such as less than 11.817°, and / or such as less than 11.193°.

[0050] In some embodiments, within manufacturing tolerances, arc segment 11 may have a radius of about 1.788 mm to about 1.976 mm. In a non-limiting example, arc segment 11 may have a radius of about 1.882 mm. In some embodiments, arc segment 11 may have a radius of at least 1.788 mm. In various embodiments, within manufacturing tolerances, arc segment 11 may have a relative angle (or variation in normal orientation) of about 61.465° to about 67.935°. In a non-limiting example, arc segment 11 may have a relative angle of about 64.700°. In some embodiments, the relative angle of arc segment 11 may be less than 61.465°.

[0051] In various embodiments, within manufacturing tolerances, arc segment 12 may have a radius of about 5.384 mm to about 5.950 mm. In a non-limiting example, arc segment 12 may have a radius of about 5.667 mm. In some embodiments, arc segment 12 may have a radius of at least 5.384 mm. In some embodiments, within manufacturing tolerances, arc segment 12 may have a relative angle (or variation in normal orientation) of about 19.000° to about 21.000°. In a non-limiting example, arc segment 12 may have a relative angle of about 20.000°. In some embodiments, the relative angle of arc segment 12 may be less than 19.000°.

[0052] In various embodiments, within manufacturing tolerances, arc segment 13 may have a radius of about 0.823 mm to about 0.909 mm. In a non-limiting example, arc segment 13 may have a radius of about 0.866 mm. In some embodiments, arc segment 13 may have a radius of at least 0.823 mm. In some embodiments, within manufacturing tolerances, arc segment 13 may have a relative angle (or variation in normal orientation) of about 74.100° to about 81.900°. In a non-limiting example, arc segment 13 may have a relative angle of about 78.000°. In some embodiments, the relative angle of arc segment 13 may be less than 74.100°.

[0053] Alternatively, in some embodiments, the crown 117 of the can lid (e.g., defined by arc segments 11-13) may be substantially constant, and the arc segments defining the inner wall, countersunk groove, and chuck wall (e.g., arc segments 1-10) may be controlled to provide a can lid with improved buckling strength and / or performance. In other embodiments, the arc segments defining the crown 117 may be varied as needed.

[0054] In addition to arc segments, and as referenced below. Figure 12 The improved can lids discussed herein are characterized by various sizes, profiles, and / or relative sizes and / or profiles.

[0055] like Figure 12 As shown, the countersunk groove 113 of the can lid 1201 typically has a countersunk groove center 1239, which is the lowest point of the countersunk groove 113. For example... Figure 12 As shown, the crown 117 of the can lid 1201 typically has a crown transition point 1241 (e.g., Figure 12 The point between the middle arc segment 11 and the arc segment 12, and / or the transition point between the inner wall 121 and the top wall 123, is the crown transition point where the crown 117 transitions from a more vertical extension (e.g., arc segment 11) to a more horizontal extension (e.g., arc segment 12). The crown transition point 1241 is not necessarily the highest part (or center) of the crown 117, but it can be in some embodiments. In various embodiments, the more vertically extending arc segment (e.g., arc segment 11 and / or inner wall 121) defining the crown transition point 1241 includes the segment center 1243.

[0056] In some embodiments, the can lid 1201 includes an inner diameter 1231, which is defined as the distance between countersunk groove transition points 1239 on opposite sides of the can lid 1201. The inner diameter 1231 can be of various diameters as needed, and the inner diameters shown and described should not be considered limiting. In some embodiments, regardless of a particular inner diameter size, the profile and / or dimensions of the irregular portion of the can lid can provide improved buckling strength and / or performance.

[0057] In some embodiments, the can lid 1201 includes an internal profile offset 1233, defined as the distance between the countersunk groove transition point 1239 and the center 1243 of a segment of a more vertically extending arcuate segment (e.g., arcuate segment 11 and / or inner wall 121) defining the crown transition point 1241 of the crown 117. The internal profile offset 1233 can be of various diameters as needed. In some embodiments, within manufacturing tolerances, the internal profile offset 1233 can be from about 4.195 mm to about 6.293 mm, such as from about 4.720 mm to about 5.768 mm, and / or such as from about 4.982 mm to about 5.507 mm. In a non-limiting example, the internal profile offset 1233 can be about 5.244 mm. In some embodiments, the internal profile offset 1233 can be at least 4.195 mm, such as at least 4.719 mm, and / or such as at least 4.982 mm.

[0058] like Figure 12As shown, in various embodiments, the can lid 1201 includes a plate height 1235, which is defined as the distance from the lower end of the can lid 1201 (e.g., defined by a countersunk groove) to the center plate 103. The plate height 1235 can be various heights as needed. In some embodiments, within manufacturing tolerances, the plate height 1235 can be from about 2.935 mm to about 4.402 mm, such as from about 3.301 mm to about 4.035 mm, and / or such as from about 3.485 mm to about 3.852 mm. In a non-limiting example, the plate height 1235 can be about 3.668 mm. In some embodiments, the plate height 1235 can be at least 2.935 mm, such as at least 3.301 mm, and / or such as at least 3.485 mm.

[0059] In some embodiments, the can lid 1201 includes a total height 1237, which is defined as the distance from the lower end of the can lid 1201 (e.g., defined by a countersunk groove) to the upper end of the can lid 1201 (e.g., defined by a crown 117). The total height 1237 can be various heights as needed. In some embodiments, within manufacturing tolerances, the total height 1237 can be from about 5.524 mm to about 8.286 mm, such as from about 6.215 mm to about 7.596 mm, and / or such as from about 6.560 mm to about 7.251 mm. In a non-limiting example, the total height 1237 can be about 6.905 mm. In some embodiments, the total height 1237 can be at least 5.524 mm, such as at least 6.215 mm, and / or such as at least 6.560 mm.

[0060] In one non-limiting example, a can lid 1201 having an internal profile offset 1233 from about 4.195 mm to about 6.293 mm, a plate height 1235 from about 2.935 mm to about 4.402 mm, and an overall height 1237 from about 5.524 mm to about 8.286 mm may have improved performance compared to conventional can lid designs. As another non-limiting example, a can lid 1201 having an internal profile offset 1233 from about 4.720 mm to about 5.769 mm, a plate height 1235 from about 3.301 mm to about 4.035 mm, and an overall height 1237 from about 6.215 mm to about 7.596 mm may have improved performance compared to conventional can lid designs. As another non-limiting example, a can lid 1201 having an internal profile offset 1233 from about 4.982 mm to about 5.507 mm, a plate height 1235 from about 3.485 mm to about 3.852 mm, and an overall height 1237 from about 6.560 mm to about 7.251 mm may have improved performance compared to conventional can lid designs. In another non-limiting example, a can lid 120 having an internal profile offset 1233 of about 5.244 mm, a plate height 1235 of about 3.668 mm, and an overall height 1237 of 6.905 mm may have improved performance compared to conventional can lid designs.

[0061] As discussed in detail below, a can lid with the aforementioned arc segment and / or dimensions (e.g., internal profile offset 1233, plate height 1235, and / or total height 1237) can be an improved can lid with optimized buckling strength and mass compared to conventional can lids. In some embodiments, the can lid may have improved buckling strength, thereby allowing materials with high recycled content and / or lower strength (such as, but not limited to, 3xxx series aluminum alloys) to be used instead of conventional materials (e.g., 5xxx series aluminum alloys) for the can lid. As a non-limiting example, the can lid described herein may utilize AA3104 as the material for the can lid. Additionally, or alternatively, the can lid described herein has improved buckling strength, thereby allowing thinner gauge materials to be used for the can lid, such as, but not limited to, high-strength, low-recycle aluminum alloys, such as 5xxx series aluminum alloys. As a non-limiting example, the can lid described herein may utilize AA5182 as the material for the can lid compared to conventional can lids (such as, but not limited to, type B64 can lids and type CDL can lids). Various other benefits and advantages can be achieved using the systems and methods described herein, and these benefits and advantages should not be considered limiting.

[0062] Specific examples of can lid outlines Figure 6 This illustrates a series of arc segments A1-A connected end-to-end according to some embodiments.14 (exist Figure 6 The can lid 601 is part of the specified value indicated in sections 1 to 14. For example, the can lid 601 may correspond to example selection 512 or other selections according to box 208 of process 200 and / or box 308 of process 300.

[0063] Figure 7 This shows a set of non-restrictive examples of specified values. For example, these values ​​can be compared with... Figure 6 The series of arc segments A1-A shown 14 Correspondingly. For example, Figure 6 and Figure 7 The series of A1-A represented 14 Including the initial arc segment A1 and various intermediate arc segments A2-A 13 and final arc segment A 14 A series of arc segments A1-A 14 The segments are arranged such that the starting point of the initial arc segment is adjacent to the center plate, the starting points of each intermediate arc segment and the starting point of the final arc segment are adjacent to the endpoint of the preceding arc segment in the series, and the endpoint of the final arc segment is located at the end of the edge of the can lid. Each arc segment is arranged along a radius (e.g., in millimeters (mm) such as...) Figure 7 (as shown in the middle column) and the change in normal vector orientation (e.g., in degrees (°), such as...) Figure 7 The path (defined in the right column as relative angles) extends from the starting point to the ending point. Positive numbers in the relative angle column correspond to clockwise changes or rotations, while negative numbers correspond to counterclockwise directions. Values ​​may be given within manufacturing tolerances, which may correspond to within 0.001 mm and / or other suitable amounts.

[0064] like Figure 6 and Figure 7 This indicates a series of arc segments A1-A in sequence, within manufacturing tolerances. 14It may include a first arc segment (corresponding to the initial arc segment and defined by a radius of 0.463 mm and a normal vector orientation change of 47.800°), a second arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 77.600 mm and a normal vector orientation change of 0.510°), a third arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.476 mm and a normal vector orientation change of 42.730°), a fourth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 38.100 mm and a normal vector orientation change of 0.530°), a fifth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.657 mm and a normal vector orientation change of -93.620°), and a sixth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.303 mm and a normal vector orientation change of 0.303 mm). The seventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 195.200 mm and a normal vector orientation change of -85.690°), the eighth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 2.090 mm and a normal vector orientation change of 45.240°), the ninth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 2.670 mm and a normal vector orientation change of -32.980°), the tenth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 2.520 mm and a normal vector orientation change of 24.930°), the eleventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 1.620 mm and a normal vector orientation change of 45.000°), and the twelfth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 3.040 mm and a normal vector orientation change of -85.690°), are defined by a radius of 195.200 mm and a normal vector orientation change of -0.450°. The series of arc segments A1-A are defined by the following: a radius of 1.310 mm and a normal vector orientation change of 25.000°; a thirteenth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 1.310 mm and a normal vector orientation change of 45.000°); and a fourteenth arc segment (corresponding to the final arc segment and defined by a radius of 0.726 mm and a normal vector orientation change of 26.000°). 14 This can be achieved relative to a reference diameter of 41.478 mm or other values. For example, the reference diameter can correspond to the maximum dimension of the center plate 103 and / or the dimension between the starting points of the initial arc segments on opposite sides of the center plate.

[0065] Figure 8 This illustrates a series of arc segments A1-A connected end-to-end according to some embodiments. 12 (exist Figure 8The can lid 701 is part of the specified value indicated in sections 1 to 12. For example, the can lid 701 may be compatible with a can from... Figure 5 The selection corresponds to other selections in box 208 of process 200 and / or box 308 of process 300.

[0066] Figure 9 This shows a set of non-restrictive examples of specified values. For example, these values ​​can be compared with... Figure 8 The series of arc segments A1-A shown 12 Correspondingly. For example, Figure 8 and Figure 9 The series of A1-A represented 12 Including the initial arc segment A1 and various intermediate arc segments A2-A 11 and final arc segment A 12 A series of arc segments A1-A 12 The segments are arranged such that the starting point of the initial arc segment is adjacent to the center plate, the starting points of each intermediate arc segment and the starting point of the final arc segment are adjacent to the endpoint of the preceding arc segment in the series, and the endpoint of the final arc segment is located at the end of the edge of the can lid. Each arc segment is arranged along a radius (e.g., in millimeters (mm) such as...) Figure 9 (as shown in the middle column) and the change in normal vector orientation (e.g., in degrees (°), such as...) Figure 9 The path (defined in the right column as relative angles) extends from the starting point to the ending point. Positive numbers in the relative angle column correspond to clockwise changes or rotations, while negative numbers correspond to counterclockwise directions. Values ​​may be given within manufacturing tolerances, which may correspond to within 0.001 mm and / or other suitable amounts.

[0067] like Figure 8 and Figure 9 As shown, within the manufacturing tolerances, a series of arc segments A1-A in sequence 12It may include a first arc segment (corresponding to the initial arc segment and defined by a radius of 0.508 mm and a normal vector orientation change of 32.044°), a second arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 82.150 mm and a normal vector orientation change of 1.677°), a third arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.575 mm and a normal vector orientation change of 34.298°), a fourth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 27.150 mm and a normal vector orientation change of 3.483°), a fifth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.550 mm and a normal vector orientation change of -77.578°), and a sixth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.213 mm and a normal vector orientation change of 0.213 mm). The seventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 247.800 mm and a normal vector orientation change of -73.845°), the eighth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 2.604 mm and a normal vector orientation change of 46.497°), the ninth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 5.474 mm and a normal vector orientation change of -38.524°), the tenth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 1.882 mm and a normal vector orientation change of 64.700°), the eleventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 5.667 mm and a normal vector orientation change of 20.000°), and the twelfth arc segment (corresponding to the final arc segment and defined by a radius of 0.866 mm and a normal vector orientation change of -73.845°), are defined by a radius of 247.800 mm and a normal vector orientation change of -73.845°. (Limited by the radius of mm and the orientation of the normal vector at 78.000°). A series of arc segments A1-A 12 This can be achieved relative to a reference diameter of 35.860 mm or other values. For example, the reference diameter can correspond to the maximum dimension of the center plate 103 and / or the dimension between the starting points of the initial arc segments on opposite sides of the center plate.

[0068] Figure 10 Another non-limiting example of a specified set of values ​​is shown. For example, these values ​​can be related to... Figure 8 The series of arc segments A1-A shown 12 Correspondingly. For example, Figure 8 and Figure 10 The series of A1-A represented 12 Including the initial arc segment A1 and various intermediate arc segments A2-A 11 and final arc segment A 12 A series of arc segments A1-A12 The segments are arranged such that the starting point of the initial arc segment is adjacent to the center plate, the starting points of each intermediate arc segment and the starting point of the final arc segment are adjacent to the endpoint of the preceding arc segment in the series, and the endpoint of the final arc segment is located at the end of the edge of the can lid. Each arc segment is arranged along a radius (e.g., in millimeters (mm) such as...) Figure 10 (as shown in the middle column) and the change in normal vector orientation (e.g., in degrees (°), such as...) Figure 10 The path (marked in the right column as relative angles) extends from the starting point to the ending point. Positive numbers in the relative angle column correspond to clockwise changes or rotations, while negative numbers correspond to counterclockwise directions. Values ​​may be given within manufacturing tolerances, which may correspond to within 0.001 mm and / or within 0.001 and / or other suitable amounts.

[0069] like Figure 8 and Figure 10 As shown, within the manufacturing tolerances, a series of arc segments A1-A in sequence 12It may include a first arc segment (corresponding to the initial arc segment and defined by a radius of 0.529 mm and a normal vector orientation change of 35.312°), a second arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 79.680 mm and a normal vector orientation change of -0.206°), a third arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.567 mm and a normal vector orientation change of 36.685°), a fourth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 28.069 mm and a normal vector orientation change of 4.251°), a fifth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.702 mm and a normal vector orientation change of -76.916°), and a sixth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.232 mm and a normal vector orientation change of 35.312°). The seventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 193.100 mm and a normal vector orientation change of -73.606°), the eighth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 2.363 mm and a normal vector orientation change of 52.548°), the ninth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 4.908 mm and a normal vector orientation change of -50.918°), the tenth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 1.882 mm and a normal vector orientation change of 64.704°), the eleventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 5.667 mm and a normal vector orientation change of 20.000°), and the twelfth arc segment (corresponding to the final arc segment and defined by a radius of 0.866 mm and a normal vector orientation change of -73.606°), are defined by a radius of 193.100 mm and a normal vector orientation change of -73.606°. (Limited by the radius of mm and the orientation of the normal vector at 78.000°). A series of arc segments A1-A 12 This can be achieved relative to a reference diameter of 37.920 mm or other values. For example, the reference diameter can correspond to the maximum dimension of the center plate 103 and / or the dimension between the starting points of the initial arc segments on opposite sides of the center plate.

[0070] Figure 12 This illustrates a series of arc segments A1-A connected end-to-end according to some embodiments. 13 (exist Figure 12 A portion of the can lid 1201, as indicated in sections 1 to 13). For example, the can lid 1201 may be compatible with [the specified values ​​from...]. Figure 5 The selection corresponds to other selections in box 208 of process 200 and / or box 308 of process 300.

[0071] Figure 13This shows a set of non-restrictive examples of specified values. For example, these values ​​can be compared with... Figure 12 The series of arc segments A1-A shown 13 Correspondingly. For example, Figure 12 and Figure 13 The series of A1-A represented 13 Including the initial arc segment A1 and various intermediate arc segments A2-A 12 and final arc segment A 13 A series of arc segments A1-A 13 The segments are arranged such that the starting point of the initial arc segment is adjacent to the center plate, the starting points of each intermediate arc segment and the starting point of the final arc segment are adjacent to the endpoint of the preceding arc segment in the series, and the endpoint of the final arc segment is located at the end of the edge of the can lid. Each arc segment is arranged along a radius (e.g., in millimeters (mm) such as...) Figure 13 (as shown in the middle column) and the change in normal vector orientation (e.g., in degrees (°), such as...) Figure 13 The path (defined in the right column as relative angles) extends from the starting point to the ending point. Positive numbers in the relative angle column correspond to clockwise changes or rotations, while negative numbers correspond to counterclockwise directions. Values ​​may be given within manufacturing tolerances, which may correspond to within 0.001 mm and / or other suitable amounts.

[0072] like Figure 12 and Figure 13 As shown, within the manufacturing tolerance range, a series of arc segments A1-A in sequence 13It may include a first arc segment (corresponding to the initial arc segment and defined by a radius of 0.505 mm and a normal vector orientation change of 43.143°), a second arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 75.130 mm and a normal vector orientation change of 1.562°), a third arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.551 mm and a normal vector orientation change of 30.015°), a fourth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 24.510 mm and a normal vector orientation change of 3.477°), a fifth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.461 mm and a normal vector orientation change of -75.432°), and a sixth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.183 mm and a normal vector orientation change of 0.183 mm). The seventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 203.500 mm and a normal vector orientation change of -77.989°), the eighth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 3.007 mm and a normal vector orientation change of 40.843°), the ninth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 5.157 mm and a normal vector orientation change of -35.677°), the tenth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 2.750 mm and a normal vector orientation change of 11.557°), the eleventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 1.882 mm and a normal vector orientation change of 49.997°), and the twelfth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 5.667 mm and a normal vector orientation change of -77.989°), are defined by a radius of 203.500 mm and a normal vector orientation change of -77.989°. The series of arc segments A1-A are defined by a radius of 0.866 mm and a normal vector orientation change of 20.000°, and a thirteenth arc segment (corresponding to the final arc segment and defined by a radius of 0.866 mm and a normal vector orientation change of 78.000°). 13 This can be achieved relative to a reference diameter of 38.280 mm or other values. For example, the reference diameter can correspond to the maximum dimension of the center plate 103 and / or the dimension between the starting points of the initial arc segments on opposite sides of the center plate.

[0073] Figure 14 Another non-limiting example of a specified set of values ​​is shown. For example, these values ​​can be related to... Figure 2 The series of arc segments A1-A shown 13 Correspondingly. For example, Figure 12 and Figure 14 The series of A1-A represented 13Including the initial arc segment A1 and various intermediate arc segments A2-A 12 and final arc segment A 13 A series of arc segments A1-A 13 The segments are arranged such that the starting point of the initial arc segment is adjacent to the center plate, the starting points of each intermediate arc segment and the starting point of the final arc segment are adjacent to the endpoint of the preceding arc segment in the series, and the endpoint of the final arc segment is located at the end of the edge of the can lid. Each arc segment is arranged along a radius (e.g., in millimeters (mm) such as...) Figure 14 (as shown in the middle column) and the change in normal vector orientation (e.g., in degrees (°), such as...) Figure 14 The path (marked in the right column as relative angles) extends from the starting point to the ending point. Positive numbers in the relative angle column correspond to clockwise changes or rotations, while negative numbers correspond to counterclockwise directions. Values ​​may be given within manufacturing tolerances, which may correspond to within 0.001 mm and / or within 0.001 and / or other suitable amounts.

[0074] like Figure 12 and Figure 14 As shown, within the manufacturing tolerance range, a series of arc segments A1-A in sequence 13It may include a first arc segment (corresponding to the initial arc segment and defined by a radius of 0.515 mm and a normal vector orientation change of 36.468°), a second arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 73.470 mm and a normal vector orientation change of 1.443°), a third arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.627 mm and a normal vector orientation change of 31.452°), a fourth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 28.661 mm and a normal vector orientation change of 3.313°), a fifth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.477 mm and a normal vector orientation change of -75.924°), and a sixth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 0.203 mm and a normal vector orientation change of 0.203 mm). The seventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 257.050 mm and a normal vector orientation change of -80.063°), the eighth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 2.762 mm and a normal vector orientation change of 49.754°), the ninth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 4.986 mm and a normal vector orientation change of -34.841°), the tenth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 2.752 mm and a normal vector orientation change of 10.631°), the eleventh arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 1.882 mm and a normal vector orientation change of 50.007°), and the twelfth arc segment (corresponding to one of the intermediate arc segments and defined by a radius of 5.667 mm and a normal vector orientation change of 10.631°), are defined by a radius of 2.752 mm and a normal vector orientation change of 10.631°. The series of arc segments A1-A are defined by a radius of 0.866 mm and a normal vector orientation change of 20.000°, and a thirteenth arc segment (corresponding to the final arc segment and defined by a radius of 0.866 mm and a normal vector orientation change of 78.000°). 13 This can be achieved relative to a reference diameter of 39.039 mm or other values. For example, the reference diameter can correspond to the maximum dimension of the center plate 103 and / or the dimension between the starting points of the initial arc segments on opposite sides of the center plate.

[0075] In some implementations, such as Figure 7 , Figure 9 , Figure 10 , Figure 12 , Figure 13 and Figure 14The specific set of specified values ​​shown for a series of arc segments connected end-to-end to define the can lid can be an improved can lid that optimizes buckling strength and mass compared to conventional can lids. In various embodiments, such as... Figure 7 , Figure 9 , Figure 10 , Figure 12 , Figure 13 and Figure 14 The specific set of specified values ​​for the series of arc segments shown, used to define the can lid end-to-end, can be a profile on the Pareto front. In some embodiments, such as Figure 7 , Figure 9 , Figure 10 , Figure 12 , Figure 13 and Figure 14 The specific values ​​shown for the defined can lids can provide improved buckling strength for the can lids, thereby allowing materials with high recycled content and / or lower strength (such as, but not limited to, 3xxx series aluminum alloys) to be used instead of conventional materials used for can lids (e.g., 5xxx series aluminum alloys). As a non-limiting example, such as... Figure 7 , 9 The specific values ​​for the can lids shown in 10, 12, 13, and 14 allow the use of AA3104 as the can lid material. Additionally, or alternatively, such as Figure 7 , 9 The specific values ​​for the defined can lids shown in 10, 13, and 14 provide improved buckling strength, thus allowing for the use of thinner-gauge materials for the can lids, such as, but not limited to, high-strength, low-recycle aluminum alloys, such as the 5xxx series aluminum alloys. As a non-limiting example, compared to conventional can lids (such as, but not limited to, type B64 and type CDL can lids), such as Figure 7 , Figure 9 , Figure 10 , Figure 12 , Figure 13 and Figure 14 The specific values ​​shown for the limited can lid allow the use of a thinner specification of AA5182 as the can lid material.

[0076] Specific examples of can lid profiles with varying countersunk groove radii. In some implementations, a profile with suitable characteristics can be achieved to accommodate additional and / or alternative parameters. Figure 15 Some examples are shown in the document.

[0077] Figure 15 An example of the outline AH of a portion of a can lid 1501 is shown. For example, the outline AH of the can lid 1501 may be selected from different options for selection according to box 208 of process 200 and / or box 308 of process 300. According to some embodiments, the outline AH may each have a series of arc segments A1-A connected end-to-end.13 (For example, it can be combined with) Figure 12 Individual combinations of specified values ​​for the arc segments (marked as segments 1 to 13). For example, Figure 15 Each of the contours in AH can be derived from Figure 16 The example shown is for Figure 12 The values ​​of the radius and relative angle for each of segments S1-S13 are represented by corresponding combinations. Additionally or alternatively, Figure 15 Each of the contours in AH can be derived from Figure 17 The information shown is about the Figure 12 The outline is represented by the corresponding combination of values ​​of the parameters identified by the accompanying symbols and / or other parameters further explained herein. However, the outline is not limited to... Figure 16 The exact values ​​in 17 and / or 17 are used, and it should be understood that the profile AH is illustrative and may be affected by variations within other ranges described herein.

[0078] Contour AH can be relative to previous information about Figure 12 The features (e.g., having the same or different values ​​as those previously described in earlier examples) and / or regarding features not yet relative to... Figure 12 The other features described above are used to achieve this. Therefore, for ease of understanding, the interpretation relative to contour AH may include, relative to... Figure 12 The discussion of various features, which may be repeated and / or described with respect to other values ​​and / or features besides those previously mentioned.

[0079] like Figure 12 As shown, the countersunk groove 113 of the can lid 1201 typically has a countersunk groove center 1239, which is the lowest point of the countersunk groove 113. For example, the countersunk groove center 1239 may correspond to a countersunk groove transition point, where the surface of the countersunk groove transitions from downward extension to upward extension (or vice versa). Figure 12 As shown, the crown 117 of the can lid 1201 typically has a crown transition point 1241 (e.g., Figure 12 The point between the middle arc segment 11 and the arc segment 12, and / or the transition point between the inner wall 121 and the top wall 123, is the crown transition point where the crown 117 transitions from a more vertical extension (e.g., arc segment 11) to a more horizontal extension (e.g., arc segment 12). The crown transition point 1241 is not necessarily the highest part (or center) of the crown 117, but it can be in some embodiments. In various embodiments, the more vertically extending arc segment (e.g., arc segment 11 and / or inner wall 121) defining the crown transition point 1241 includes the segment center 1243.

[0080] In some embodiments, the can lid 1201 includes an inner diameter 1231, which is defined as the distance between countersunk groove transition points 1239 on opposite sides of the can lid 1201. The inner diameter 1231 can be of various diameters as needed, and the inner diameters shown and described should not be considered limiting. In some embodiments, regardless of a particular inner diameter size, the profile and / or dimensions of the irregular portion of the can lid can provide improved buckling strength and / or performance.

[0081] In some embodiments, the can lid 1201 includes a plate radius 1232, which can be defined as the distance between the center of the central plate 103 and the plate edge 1234. For example, the center of the central plate 103 may be located at... Figure 1 On the referenced vertical axis 119. The plate edge 1234 may correspond to a transition point (such as the starting point of arc segment 1) between the center plate 103 and the irregular portion 105. The plate radius 1232 may be of various sizes as needed, and the plate radius shown and described should not be considered limiting. In some embodiments, the size of the profile and / or dimensions of the center plate 103 may be suitably designed to accommodate scoring lines, pull tabs, rivets, and / or other features for facilitating opening the can lid 1201 in use to access the contents through the can lid 1201. In some embodiments, within manufacturing tolerances, the plate radius 1232 may be from about 20.300 mm to about 20.500 mm, such as from about 20.350 mm to about 20.450 mm, and / or such as from about 20.351 mm to about 20.408 mm. In some embodiments, the plate radius 1232 may be at least 20.300 mm, such as at least 20.350 mm, such as at least 20.351 mm, such as at least 20.353 mm, such as at least 20.354 mm, such as at least 20.355 mm, such as at least 20.357 mm, such as at least 20.359 mm, such as at least 20.361 mm, and / or such as at least 20.408 mm. In a non-limiting example, the plate radius 1232 may be about 20.351 mm (e.g., as indicated by contour E). In this context, "about" may mean within ±0.010 mm and / or in combinations of the listed endpoints.

[0082] In some embodiments, the can lid 1201 includes a chuck wall offset 1236, which can be defined as the lateral distance between the plate edge 1234 and the countersunk groove transition point 1239. The chuck wall offset 1236 can be of various sizes as needed, and the dimensions shown and described should not be considered limiting. In some embodiments, the chuck wall offset 1236 can be the difference between the inner diameter 1231 and twice the plate radius 1232.

[0083] In some embodiments, the can lid 1201 includes an internal profile offset 1233, defined as the distance between the countersunk groove transition point 1239 and the center 1243 of a segment of a more vertically extending arcuate segment (e.g., arcuate segment 11 and / or inner wall 121) defining the crown transition point 1241 of the crown 117. The internal profile offset 1233 can be of various diameters as required. In some embodiments, within manufacturing tolerances, the internal profile offset 1233 can be from about 5.302 mm to about 8.231 mm, such as from about 5.596 mm to about 7.857 mm, such as from about 5.773 mm to about 7.633 mm, and / or such as from about 5.891 mm to about 7.483 mm. In some embodiments, the inner profile offset 1233 can be at least 5.891 mm, such as at least 6.295 mm, such as at least 6.390 mm, such as at least 6.542 mm, such as at least 6.740 mm, such as at least 6.890 mm, such as at least 7.149 mm, and / or such as at least 7.483 mm. In a non-limiting example, the inner profile offset 1233 can be about 5.891 mm (e.g., as represented by profile E). In this context, "about" can mean within ±0.010 mm and / or in a combination of the listed endpoints.

[0084] In some embodiments, the can lid 1201 includes an outer profile offset 1238, which can be defined as the distance between the outer edge 1240 of the can lid 1201 and the center 1243 of a segment of a more vertically extending arcuate segment (e.g., arcuate segment 11 and / or inner wall 121) defining the crown transition point 1241 of the crown 117. For example, the outer edge 1240 may be... Figure 1 The referenced outer end or end 107 corresponds to the outer contour offset 1238. The outer contour offset 1238 can be of various sizes as needed, and the dimensions shown and described should not be considered limiting. In some embodiments, the total diameter of the can lid 1201 may correspond to the sum of twice the outer contour offset 1238, twice the inner contour offset 1233, and the inner diameter 1231 (and the inner diameter 1231 may in turn correspond to the sum of twice the chuck wall offset 1236 and twice the plate radius 1232).

[0085] like Figure 12As shown, in various embodiments, the can lid 1201 includes a plate height 1235, which is defined as the distance from the lower end of the can lid 1201 (e.g., defined by a countersunk groove) to the center plate 103. The plate height 1235 can be various heights as needed. In some embodiments, within manufacturing tolerances, the plate height 1235 can be from about 2.000 mm to about 3.200 mm, such as from about 2.200 mm to about 2.900 mm, and / or such as from about 2.400 mm to about 2.700 mm. In some embodiments, the plate height 1235 may be at least 2.000 mm, such as at least 2.200 mm, such as at least 2.400 mm, such as at least 2.459 mm, such as at least 2.537 mm, such as at least 2.581 mm, such as at least 2.593 mm, such as at least 2.597 mm, such as at least 2.610 mm, such as at least 2.669 mm, and / or such as at least 2.670 mm. In a non-limiting example, the plate height 1235 may be about 2.670 mm (e.g., as indicated by contour E). In this context, "about" may mean within ±0.010 mm and / or in a combination of the listed endpoints.

[0086] In some embodiments, the can lid 1201 includes a total height 1237, which is defined as the distance from the lower end of the can lid 1201 (e.g., defined by a countersunk groove) to the upper end of the can lid 1201 (e.g., defined by a crown 117). The total height 1237 can be various heights as needed. In some embodiments, within manufacturing tolerances, the total height 1237 can be from about 5.524 mm to about 8.286 mm, such as from about 6.200 mm to about 8.000 mm, such as from about 6.800 mm to about 7.400 mm, such as from 7.000 mm to about 7.200 mm, and / or such as from 7.054 mm to about 7.176 mm. In some embodiments, the total height 1237 can be at least 5.524 mm, such as at least 6.215 mm, such as at least 6.560 mm, such as at least 7.054 mm, such as at least 7.093 mm, such as at least 7.119 mm, such as at least 7.133 mm, such as at least 7.138 mm, such as at least 7.156 mm, such as at least 7.158 mm, and / or such as at least 7.158 mm. In a non-limiting example, the total height 1237 can be about 7.054 mm (e.g., as represented by contour E). In this context, "about" can mean within ±0.010 mm and / or in a combination of the listed endpoints.

[0087] In some embodiments, the can lid 1201 includes a countersunk groove radius 1242. The countersunk groove radius 1242 can be the radius of an arc segment present at the lower end or inflection point of the countersunk groove. For example, the countersunk groove radius can be the radius present at the countersunk groove transition point 1239. In various embodiments, the countersunk groove radius 1242 can correspond to the radius of an arc segment formed by a combination of arc segments 4 and 5. The countersunk groove radius 1242 can be of various sizes as needed, and the plate radii shown and described should not be considered limiting.

[0088] In some implementations, the countersunk groove radius 1242 is designed to be above a minimum threshold, below a maximum threshold, and / or within a range to achieve one or more benefits. The countersunk groove radius 1242 may be designed to be large enough to avoid metal exposure. For example, below the minimum threshold of the countersunk groove radius 1242, the can lid 101 may face the risk of metal exposure, which could correspond to cracks in the coating on the bottom surface of the can lid 101 and expose the contents of the can to the underlying metal of the can lid 1201. In some test examples, metal exposure has been observed with a countersunk groove radius 1242 of 0.280 mm. Therefore, the countersunk groove radius 1242 may be designed to be above the minimum threshold to reduce or eliminate the risk of metal exposure. In some embodiments, within manufacturing tolerances, the countersunk groove radius 1242 can be at least 0.290 mm, such as at least 0.300 mm, such as at least 0.310 mm, such as at least 0.350 mm, such as at least 0.370 mm, such as at least 0.400 mm, such as at least 0.440 mm, such as at least 0.450 mm, such as at least 0.500 mm, and / or such as at least 0.550 mm.

[0089] The countersunk groove radius 1242 can be designed to be small enough to exceed a certain amount of buckling pressure and / or prevent the buckling pressure from dropping below a target value. For example, increasing the countersunk groove radius 1242 can result in a corresponding decrease in the buckling pressure of the can lid 1201. Therefore, the countersunk groove radius 1242 can be designed to be below a maximum threshold to accommodate buckling pressure parameters. In some embodiments, within manufacturing tolerances, the countersunk groove radius 1242 can be no more than 0.650 mm, such as no more than 0.600 mm, such as no more than 0.550 mm, such as no more than 0.500 mm, such as no more than 0.450 mm, such as no more than 0.440 mm, such as no more than 0.400 mm, such as no more than 0.370 mm, such as no more than 0.350 mm, and / or such as no more than 0.315 mm, and / or such as no more than 0.310 mm, and / or such as no more than 0.300 mm.

[0090] The size of the countersunk groove radius 1242 can be designed within a range, such as to balance parameters related to avoiding metal exposure and parameters related to exceeding the target minimum buckling pressure. In some embodiments, within manufacturing tolerances, the countersunk groove radius 1242 can be from about 0.290 mm to about 0.650 mm, such as from about 0.300 mm to about 0.600 mm, such as from about 0.310 mm to about 0.550 mm. In a non-limiting example, the countersunk groove radius 1242 can be about 0.440 mm (e.g., as indicated by profile E). In this context, "about" can mean within ±0.010 mm and / or in a combination of the listed endpoints.

[0091] In some embodiments, the can lid 1201 includes, according to Figure 17 Other features formed by one or more other parameters listed in the diagram. Examples may include shell diameter (e.g., which may correspond to the total size of the shell having that profile, measured in millimeters, such as the sum of twice the outer profile offset 1238, twice the inner profile offset 1233, and the inner diameter 1231), weight (e.g., which may correspond to the total weight of the shell having that profile, measured in grams), dimensions (e.g., which may correspond to the thickness of the material of the shell having that profile before deformation, measured in millimeters), and / or buckling stress (e.g., which may correspond to the pressure at which the shell having that profile may buckle, as tested, simulated, and / or calculated, measured in pounds per square inch (PSI)). However, the parameter values ​​shown in the diagram are not limiting. For example, although Figure 17 The charts in the document list a consistent shell diameter of 60.454 mm for all profile AHs (e.g., suitable for compatibility with 202 can lids), but other shell diameters may also be used, such as to match 200 can lids, 202 can lids, 204 can lids, another standardized can lid size, or another size of can lid. As another example, other specifications and / or weights may be available besides those listed (e.g., lower values ​​for any of these parameters may be advantageous), and / or other buckling pressures may be available for and / or achieved besides those listed. The relative buckling pressure (in PSI) and countersunk groove radius (in mm) are specified for each profile AH. Figure 18 The graph shown in the figure indicates that buckling pressure can decrease as the countersunk groove radius 1242 increases, for example, making it possible to select the countersunk groove radius 1242 (e.g., and the corresponding metal exposure resistance) to achieve buckling pressure above the minimum target level.

[0092] In various embodiments, within manufacturing tolerances, the radius of arc segment 1 can be from about 0.380 mm to about 0.647 mm, such as from about 0.401 mm to about 0.618 mm, such as from about 0.414 mm to about 0.600 mm, and / or such as from about 0.423 mm to about 0.588 mm. In some embodiments, the radius of arc segment 1 can be at least 0.423 mm, such as at least 0.425 mm, such as at least 0.476 mm, such as at least 0.488 mm, such as at least 0.504 mm, such as at least 0.521 mm, such as at least 0.529 mm, and / or such as at least 0.588 mm. In a non-limiting example, arc segment 1 may have a radius of about 0.521 mm. In various embodiments, within manufacturing tolerances, arc segment 1 may have a relative angle (or variation in normal orientation) from about 56.855° to about 75.944°, such as from about 60.014° to about 72.492°, such as from about 61.909° to about 70.421°, and / or such as from about 63.173° to about 69.040°. In some embodiments, the relative angle of arc segment 1 may be less than 69.040°, such as less than 68.343°, such as less than 66.563°, such as less than 65.492°, such as less than 65.474°, such as less than 65.319°, such as less than 63.910°, and / or such as less than 63.173°. In a non-limiting example, arc segment 1 may have a relative angle of about 63.910°.

[0093] In various embodiments, within manufacturing tolerances, the radius of arc segment 2 can be from about 37.306 mm to about 91.716 mm, such as from about 39.379 mm to about 87.547 mm, such as from about 40.622 mm to about 85.046 mm, and / or such as from about 41.452 mm to about 83.378 mm. In some embodiments, the radius of arc segment 2 can be at least 41.452 mm, such as at least 57.310 mm, such as at least 70.623 mm, such as at least 71.841 mm, such as at least 72.576 mm, such as at least 72.613 mm, such as at least 76.591 mm, and / or such as at least 83.378 mm. In a non-limiting example, arc segment 2 may have a radius of about 70.623 mm. In various embodiments, within manufacturing tolerances, arc segment 2 may have a relative angle (or variation in normal orientation) from about 0.309° to about 0.794°, such as from about 0.326° to about 0.758°, such as from about 0.337° to about 0.736°, and / or such as from about 0.344° to about 0.721°. In some embodiments, the relative angle of arc segment 2 may be less than 0.721°, such as less than 0.671°, such as less than 0.514°, such as less than 0.509°, such as less than 0.483°, such as less than 0.423°, such as less than 0.389°, and / or such as less than 0.344°. In a non-limiting example, arc segment 2 may have a relative angle of about 0.671°.

[0094] In various embodiments, within manufacturing tolerances, the radius of arc segment 3 can be from about 0.831 mm to about 1.572 mm, such as from about 0.877 mm to about 1.501 mm, such as from about 0.905 mm to about 1.458 mm, and / or such as from about 0.924 mm to about 1.429 mm. In some embodiments, the radius of arc segment 3 can be at least 0.924 mm, such as at least 0.931 mm, such as at least 1.152 mm, such as at least 1.241 mm, such as at least 1.338 mm, such as at least 1.361 mm, such as at least 1.417 mm, and / or such as at least 1.429 mm. In a non-limiting example, arc segment 3 may have a radius of about 1.338 mm. In various embodiments, within manufacturing tolerances, arc segment 3 may have a relative angle (or variation in normal orientation) from about 14.531° to about 22.248°, such as from about 15.338° to about 21.237°, such as from about 15.823° to about 20.630°, and / or such as from about 16.146° to about 20.225°. In some embodiments, the relative angle of arc segment 3 may be less than 20.225°, such as less than 20.057°, such as less than 19.072°, such as less than 18.711°, such as less than 18.609°, such as less than 17.401°, such as less than 16.793°, and / or such as less than 16.146°. In a non-limiting example, arc segment 3 may have a relative angle of about 18.609°.

[0095] In various embodiments, within manufacturing tolerances, the radius of arc segment 4 can be from about 17.631 mm to about 32.147 mm, such as from about 18.610 mm to about 30.686 mm, such as from about 19.198 mm to about 29.809 mm, and / or such as from about 19.590 mm to about 29.224 mm. In some embodiments, the radius of arc segment 4 can be at least 19.590 mm, such as at least 23.922 mm, such as at least 24.306 mm, such as at least 26.240 mm, such as at least 26.613 mm, such as at least 27.765 mm, such as at least 28.903 mm, and / or such as at least 29.224 mm. In a non-limiting example, arc segment 4 may have a radius of about 23.922 mm. In various embodiments, within manufacturing tolerances, arc segment 4 may have a relative angle (or variation in normal orientation) from about 1.548° to about 2.880°, such as from about 1.634° to about 2.749°, such as from about 1.686° to about 2.671°, and / or such as from about 1.721° to about 2.618°. In some embodiments, the relative angle of arc segment 4 may be less than 2.618°, such as less than 2.599°, such as less than 2.578°, such as less than 2.091°, such as less than 2.054°, such as less than 1.963°, such as less than 1.852°, and / or such as less than 1.721°. In a non-limiting example, arc segment 4 may have a relative angle of about 1.963°.

[0096] In various embodiments, within manufacturing tolerances, the radius of arc segment 5 can be from about 0.283 mm to about 0.605 mm, such as from about 0.299 mm to about 0.578 mm, such as from about 0.308 mm to about 0.561 mm, and / or such as from about 0.315 mm to about 0.550 mm. In some embodiments, the radius of arc segment 5 can be at least 0.315 mm, such as at least 0.350 mm, such as at least 0.370 mm, such as at least 0.400 mm, such as at least 0.440 mm, such as at least 0.450 mm, such as at least 0.500 mm, and / or such as at least 0.550 mm. In a non-limiting example, arc segment 5 may have a radius of about 0.440 mm. In various embodiments, within manufacturing tolerances, arc segment 5 may have a relative angle (or variation in normal orientation) from about -97.399° to about -91.414°, such as from about -102.810° to about -87.259°, such as from about -106.057° to about -84.766°, and / or such as from about -108.222° to about -83.103°. In some embodiments, the relative angle of arc segment 5 may be less than -83.103°, such as less than -84.237°, such as less than -85.124°, such as less than -85.971°, such as less than -86.058°, such as less than -86.725°, such as less than -91.814°, and / or such as less than -108.222°. In a non-limiting example, arc segment 5 may have a relative angle of about -86.725°.

[0097] In various embodiments, within manufacturing tolerances, the radius of arc segment 6 can be from about 0.283 mm to about 0.605 mm, such as from about 0.299 mm to about 0.578 mm, such as from about 0.308 mm to about 0.561 mm, and / or such as from about 0.315 mm to about 0.550 mm. In some embodiments, the radius of arc segment 6 can be at least 0.315 mm, such as at least 0.350 mm, such as at least 0.370 mm, such as at least 0.400 mm, such as at least 0.440 mm, such as at least 0.450 mm, such as at least 0.500 mm, and / or such as at least 0.550 mm. In a non-limiting example, arc segment 6 may have a radius of about 0.440 mm. In various embodiments, within manufacturing tolerances, arc segment 6 may have a relative angle (or variation in normal orientation) from about -76.559° to about -62.083°, such as from about -80.812° to about -59.261°, such as from about -83.364° to about -57.568°, and / or such as from about -85.066° to about -56.439°. In some embodiments, the relative angle of arc segment 6 may be less than -56.439°, such as less than -73.936°, such as less than -79.153°, such as less than -81.207°, such as less than -81.733°, such as less than -82.024°, such as less than -83.857°, and / or such as less than -85.066°. In a non-limiting example, arc segment 6 may have a relative angle of about -82.024°.

[0098] In various embodiments, within manufacturing tolerances, the radius of arc segment 7 can be from about 150.702 mm to about 256.967 mm, such as from about 159.074 mm to about 245.287 mm, such as from about 164.098 mm to about 238.279 mm, and / or such as from about 167.447 mm to about 233.606 mm. In some embodiments, the radius of arc segment 7 can be at least 167.447 mm, such as at least 192.088 mm, such as at least 215.789 mm, such as at least 218.636 mm, such as at least 223.674 mm, such as at least 225.361 mm, such as at least 225.613 mm, and / or such as at least 233.606 mm. In a non-limiting example, arc segment 7 may have a radius of about 223.674 mm. In various embodiments, within manufacturing tolerances, arc segment 7 may have a relative angle (or variation in normal orientation) from about 0.172° to about 0.393°, such as from about 0.182° to about 0.375°, such as from about 0.188° to about 0.365°, and / or such as from about 0.192° to about 0.357°. In some embodiments, the relative angle of arc segment 7 may be less than 0.357°, such as less than 0.268°, such as less than 0.265°, such as less than 0.252°, such as less than 0.251°, such as less than 0.250°, such as less than 0.215°, and / or such as less than 0.192°. In a non-limiting example, arc segment 7 may have a relative angle of about 0.192°.

[0099] In various embodiments, within manufacturing tolerances, the radius of arc segment 8 can be from about 1.803 mm to about 3.656 mm, such as from about 1.903 mm to about 3.490 mm, such as from about 1.963 mm to about 3.390 mm, and / or such as from about 2.004 mm to about 3.323 mm. In some embodiments, the radius of arc segment 8 can be at least 2.004 mm, such as at least 2.603 mm, such as at least 2.606 mm, such as at least 2.790 mm, such as at least 2.967 mm, such as at least 3.127 mm, such as at least 3.306 mm, and / or such as at least 3.323 mm. In a non-limiting example, arc segment 8 may have a radius of about 2.790 mm. In various embodiments, within manufacturing tolerances, arc segment 8 may have a relative angle (or variation in normal orientation) from about 41.517° to about 58.799°, such as from about 43.824° to about 56.126°, such as from about 45.208° to about 54.523°, and / or such as from about 46.131° to about 53.453°. In some embodiments, the relative angle of arc segment 8 may be less than 53.453°, such as less than 53.082°, such as less than 52.045°, such as less than 51.075°, such as less than 50.933°, such as less than 47.644°, such as less than 47.613°, and / or such as less than 46.131°. In a non-limiting example, arc segment 8 may have a relative angle of about 53.082°.

[0100] In various embodiments, within manufacturing tolerances, the radius of arc segment 9 can be from about 5.135 mm to about 6.947 mm, such as from about 5.420 mm to about 6.631 mm, such as from about 5.591 mm to about 6.442 mm, and / or such as from about 5.706 mm to about 6.315 mm. In some embodiments, the radius of arc segment 9 can be at least 5.706 mm, such as at least 5.745 mm, such as at least 5.876 mm, such as at least 5.883 mm, such as at least 5.990 mm, such as at least 6.038 mm, such as at least 6.051 mm, and / or such as at least 6.315 mm. In a non-limiting example, arc segment 9 may have a radius of about 6.051 mm. In various embodiments, within manufacturing tolerances, arc segment 9 may have a relative angle (or variation in normal orientation) from about -33.244° to about -38.256°, such as from about -35.091° to about -36.517°, such as from about -36.199° to about -35.474°, and / or such as from about -36.938° to about -34.778°. In some embodiments, the relative angle of arc segment 9 may be less than -34.778°, such as less than -35.215°, such as less than -35.551°, such as less than -35.596°, such as less than -35.702°, such as less than -35.772°, such as less than -36.495°, and / or such as less than -36.938°. In a non-limiting example, arc segment 9 may have a relative angle of about -35.215°.

[0101] In various embodiments, within manufacturing tolerances, the radius of arc segment 10 can be from about 1.548 mm to about 3.578 mm, such as from about 1.634 mm to about 3.415 mm, such as from about 1.685 mm to about 3.318 mm, and / or such as from about 1.720 mm to about 3.252 mm. In some embodiments, the radius of arc segment 10 can be at least 1.720 mm, such as at least 1.966 mm, such as at least 1.977 mm, such as at least 2.461 mm, such as at least 2.633 mm, such as at least 2.637 mm, such as at least 2.893 mm, and / or such as at least 3.252 mm. In a non-limiting example, arc segment 10 may have a radius of about 1.720 mm. In various embodiments, within manufacturing tolerances, arc segment 10 may have a relative angle (or variation in normal orientation) from about 8.235° to about 13.860°, such as from about 8.692° to about 13.230°, such as from about 8.967° to about 12.852°, and / or such as from about 9.150° to about 12.600°. In some embodiments, the relative angle of arc segment 10 may be less than 12.600°, such as less than 11.188°, such as less than 10.436°, such as less than 10.207°, such as less than 10.170°, such as less than 9.330°, such as less than 9.292°, and / or such as less than 9.150°. In a non-limiting example, arc segment 10 may have a relative angle of about 9.330°.

[0102] In various embodiments, within manufacturing tolerances, the radius of arc segment 11 can be from about 1.693 mm to about 2.071 mm, such as from about 1.787 mm to about 1.977 mm, such as from about 1.844 mm to about 1.920 mm, and / or such as from about 1.882 mm to about 1.882 mm. In some embodiments, the radius of arc segment 11 can be at least 1.882 mm, such as at least 1.882 mm, such as at least 1.882 mm, such as at least 1.882 mm, such as at least 1.882 mm, such as at least 1.882 mm, and / or such as at least 1.882 mm. In a non-limiting example, arc segment 11 may have a radius of about 1.882 mm. In various embodiments, within manufacturing tolerances, arc segment 11 may have a relative angle (or variation in normal orientation) from about 40.284° to about 53.429°, such as from about 42.522° to about 51.000°, such as from about 43.865° to about 49.543°, and / or such as from about 44.761° to about 48.571°. In some embodiments, the relative angle of arc segment 11 may be less than 48.571°, such as less than 48.136°, such as less than 47.770°, such as less than 47.757°, such as less than 46.980°, such as less than 46.926°, such as less than 46.464°, and / or such as less than 44.761°. In a non-limiting example, arc segment 11 may have a relative angle of about 48.571°.

[0103] In various embodiments, within manufacturing tolerances, the radius of arc segment 12 can be from about 5.100 mm to about 6.234 mm, such as from about 5.383 mm to about 5.951 mm, such as from about 5.553 mm to about 5.781 mm, and / or such as from about 5.667 mm to about 5.667 mm. In some embodiments, the radius of arc segment 12 can be at least 5.667 mm, such as at least 5.667 mm, such as at least 5.667 mm, such as at least 5.667 mm, such as at least 5.667 mm, such as at least 5.667 mm, and / or such as at least 5.667 mm. In a non-limiting example, arc segment 12 may have a radius of about 5.667 mm. In various embodiments, within manufacturing tolerances, arc segment 12 may have a relative angle (or variation in normal orientation) from about 17.702° to about 21.636°, such as from about 18.685° to about 20.653°, such as from about 19.275° to about 20.063°, and / or such as from about 19.669° to about 19.669°. In some embodiments, the relative angle of arc segment 12 may be less than 19.669°, such as less than 19.669°, such as less than 19.669°, such as less than 19.669°, such as less than 19.669°, such as less than 19.669°, and / or such as less than 19.669°. In a non-limiting example, arc segment 12 may have a relative angle of about 19.669°.

[0104] In various embodiments, within manufacturing tolerances, the radius of arc segment 13 can be from about 0.779 mm to about 0.953 mm, such as from about 0.822 mm to about 0.910 mm, such as from about 0.848 mm to about 0.884 mm, and / or such as from about 0.866 mm to about 0.866 mm. In some embodiments, the radius of arc segment 13 can be at least 0.866 mm, such as at least 0.866 mm, such as at least 0.866 mm, such as at least 0.866 mm, such as at least 0.866 mm, such as at least 0.866 mm, and / or such as at least 0.866 mm. In a non-limiting example, arc segment 13 may have a radius of about 0.866 mm. In various embodiments, within manufacturing tolerances, arc segment 13 may have a relative angle (or variation in normal orientation) from about 70.171° to about 85.765°, such as from about 74.069° to about 81.867°, such as from about 76.408° to about 79.528°, and / or such as from about 77.968° to about 77.968°. In some embodiments, the relative angle of arc segment 13 may be less than 77.968°, such as less than 77.968°, such as less than 77.968°, such as less than 77.968°, such as less than 77.968°, and / or such as less than 77.968°. In a non-limiting example, arc segment 13 may have a relative angle of about 77.968°.

[0105] Alternatively, in some embodiments, the crown 117 of the can lid (e.g., defined by arc segments 11-13) may be substantially constant, and the arc segments defining the inner wall, countersunk groove, and chuck wall (e.g., arc segments 1-10) may be controlled to provide a can lid with improved buckling strength and / or performance. In other embodiments, the arc segments defining the crown 117 may be varied as needed.

[0106] In a non-limiting example, a can lid 1201 having a countersunk groove radius 1242 from about 0.290 mm to about 0.650 mm, a plate height 1235 from about 2.000 mm to about 3.200 mm, and a total height 1237 from about 5.524 mm to about 8.286 mm (and optionally an internal profile offset 1233 from about 5.302 mm to about 8.231 mm and / or an optional plate radius 1232 from about 20.300 mm to about 20.500 mm) may have improved performance compared to conventional can lid designs. In another non-limiting example, a can lid 1201 having a countersunk groove radius 1242 from about 0.315 mm to about 0.550 mm, a plate height 1235 from about 2.459 mm to about 2.670 mm, and a total height 1237 from about 7.054 mm to about 7.176 mm (and optionally an internal profile offset 1233 from about 5.891 mm to about 7.054 mm and / or optionally a plate radius 1232 from about 20.351 mm to about 20.408 mm) may have improved performance compared to conventional can lid designs. In another non-limiting example, a can lid 120 having a countersunk groove radius of about 0.440 mm, a plate height of about 2.670 mm, and a total height of 7.054 mm (and optionally an internal profile offset of about 5.891 mm and / or an internal profile offset of about 20.351 mm and / or a plate radius of about 20.351 mm) may have improved performance compared to conventional can lid designs.

[0107] Can lids with the aforementioned arc segments and / or dimensions (e.g., countersunk groove radius 1242, plate radius 1232, internal profile offset 1233, plate height 1235, and / or total height 1237) can be improved can lids compared to conventional can lids, exhibiting optimized resistance to metal exposure, buckling strength, clamshell failure mode, and / or improved quality. In some embodiments, the can lid may have improved buckling strength, thereby allowing materials with high recycled content and / or lower strength (such as, but not limited to, 3xxx series aluminum alloys) to be used instead of conventional materials used for can lids (e.g., 5xxx series aluminum alloys). As a non-limiting example, the can lids described herein may utilize AA3104 as the material for the can lid. Additionally, or alternatively, the can lids described herein have improved buckling strength, thereby allowing thinner-gauge materials to be used for the can lid, such as, but not limited to, high-strength, low-recycle aluminum alloys, such as 5xxx series aluminum alloys. As a non-limiting example, the can lids described herein can utilize a thinner specification of AA5182 as the material for the can lid compared to conventional can lids (such as, but not limited to, type B64 and type CDL can lids). Various other benefits and advantages can be achieved using the systems and methods described herein, and these benefits and advantages should not be considered limiting.

[0108] process exist Figure 2 The diagram shows a flowchart of process 200 according to various embodiments. Various blocks of process 200 may relate to features shown in other figures herein; however, additional or alternative components may be used with the process.

[0109] At box 202, process 200 may include providing a parameterized representation of can lid 101. Any suitable form of parameterized representation may be used. Examples may include a series of arc segments connected end-to-end (e.g., as per...). Figure 3 The above (referring to the above), spline curves, mathematical functions with first-order continuous connections, or any other representation of parameters whose values ​​can be modified to obtain different can lid profiles. Generally speaking, any number of segments can be used, from one upwards.

[0110] At box 204, process 200 may include generating a set of can lid profiles with different parameter values. The set of can lid profiles generated at box 204 may be produced based on a parameterized representation provided at box 202. For example, different values ​​of parameters may be input and output, which includes different can lid profiles that can be converged or collected into a suitable set. Examples of different parameters that can be modified may include arc length, coverage angle or included angle, variation of normal vector orientation, or other indications of orientation and / or size, arc radius, parameters of a mathematical function, or other parameters. Combinations of different values ​​to be input for the parameters may be provided by machine learning algorithms or other suitable generative techniques.

[0111] At box 206, process 200 may include evaluating a set of can lid profiles according to specified criteria. For example, specified criteria may be applied to a set of can lid profiles generated at box 204. Specified criteria may involve factors such as buckling stress, mass, strength or other material properties, alloy type, specification or thickness, maximum material stress or strain, bending radius, or other factors relevant to the can lid profile being evaluated. Some factors may be evaluated under assumption or given other factors. For example, buckling stress and / or mass may be evaluated or calculated based on a given alloy, specification, and / or geometry of the can lid profile being evaluated. As another example, one or more suitable alloy selections may be determined based on a given buckling stress, mass, specification, and / or geometry of the can lid profile being evaluated.

[0112] At box 208, process 200 may include selecting a can lid profile from the set based on performance relative to a standard. This selection may be based at least in part on an evaluation from box 206. For example, a particular can lid profile may be selected based on exhibiting buckling stress exceeding a certain threshold, exhibiting mass below a certain threshold, exceeding a certain minimum bending radius, below a certain maximum material strain, and / or meeting, exceeding, or falling below other set thresholds for other standards (e.g., using specific specifications and / or alloys).

[0113] At frame 210, process 200 may include forming a can lid using a selected can lid profile. For example, the can lid may be formed with the profile selected at frame 208. For example, the can lid may be formed using a can lid forming system.

[0114] exist Figure 3 The diagram illustrates a flowchart of process 300 according to various embodiments. Various blocks of process 300 may relate to features shown in other figures herein; however, additional or alternative components may be used with the process. Process 300 may correspond to a parameterized and / or more specific implementation of process 200.

[0115] At box 302, process 300 may include providing a parameterized representation of can lid 101. The parameterized representation may correspond to a series of arc segments connected end to end.

[0116] At box 304, process 300 may include generating a set of can lid profiles. The set of can lid profiles generated at box 304 may be produced based on a parametric representation provided at box 302. This set may include profiles that are different from each other. The profiles may have different series of arc segments that differ in combinations of arc segment lengths (or arc segment angles) and radii. As an example, two different profiles in this set may include a total of 14 arc segments, but may differ from each other in the relative size, length, and / or orientation of at least some of these 14 arc segments. Some profiles in the set generated at box 304 may have different numbers of arc segments from each other. For example, different profiles may include two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, or more arc segments. Compared to other profiles, a profile may include more, fewer, or the same number of arc segments.

[0117] At box 306, process 300 may include evaluating a set of can lid profiles based on buckling stress and mass criteria. For example, specified criteria may be applied to a set of can lid profiles generated at box 304. For example, different can lid profiles in this set may be evaluated to determine the buckling stress and a certain amount of mass that will be exhibited in can lid profiles achieved using a specific alloy and / or specific specifications.

[0118] At box 308, process 300 may include selecting a can lid profile from this set based on performance relative to buckling pressure and quality criteria. This selection may be based at least in part on an evaluation from box 306. For example, a can lid profile exhibiting a buckling pressure exceeding 90 pounds per square inch (psi) and a mass below 2.2 grams may be selected (e.g., this may correspond to industry expectations for can lid 101). The profile may be selected at box 308 based on an evaluation at box 306 indicating that, when implemented with 3xxx series aluminum alloys (such as, but not limited to, AA3104), the evaluated profile is suitable for meeting the criteria, which has a higher recycled content than 5xxx series aluminum alloys commonly used in can lids (such as, but not limited to, AA5182). Additionally, or alternatively, the profile may be selected at box 308 based on an evaluation at box 306 indicating that, when implemented with 5xxx series aluminum alloys or other selected aluminum alloys, the evaluated profile is suitable for meeting the criteria.

[0119] At frame 310, process 300 may include forming a can lid using a selected can lid profile. For example, the can lid may be formed with the profile selected at frame 308. For example, the can lid may be formed using a can lid forming system.

[0120] Figure 5 This is a graph showing an example output 500 of the evaluation. This evaluation may correspond to the actions performed at box 206 of process 200 and / or box 306 of process 300. For example, regarding... Figure 4 The parametric representation of the can lid 401 discussed may be provided at block 202 of process 200 and / or block 302 of process 300, and different values ​​may be input to generate a set of can lid profiles based on block 204 of process 200 and / or block 304 of process 300. A set of can lid profiles may be evaluated based on block 206 of process 200 and / or block 306 of process 300, and this evaluation may provide output 500. According to some embodiments, this evaluation may be performed based on buckling pressure and quality criteria.

[0121] Output 500 represents a graph showing the simulation results relative to a set of generated can lid profiles. This set of generated profiles was simulated to indicate the buckling stress and mass of each can lid profile, and these results are plotted on a graph along the X-axis representing the mass value (in grams) and along the Y-axis representing the buckling stress (in pounds per square inch or PSI). As indicated by Figure 502, points may represent profiles generated in some cases using values ​​randomly assigned within the parameterized representation of can lid 401, or in others using values ​​assigned by a machine learning algorithm. Some methods for generating different sets of parameters may include "Latin hypercube," "Monte Carlo" (i.e., random), or suitable machine learning algorithms such as gradient boosting or Bayesian optimization. A Pareto front, represented by line 504, is established to identify the profiles of interest. A reference value 510 is plotted for comparison, and this reference value represents the values ​​for commercially available can lids. An example selection 512 is shown, representing a profile selected based on favorable characteristics regarding mass and buckling stress. Example selection 512 may correspond to selection according to box 208 of process 200 and / or box 308 of process 300. For example, this selection may be adapted to form a can lid using the selected can lid profile according to box 208 of process 200 and / or box 308 of process 300.

[0122] System for can lid production Figure 11 This is a simplified schematic diagram illustrating examples of control aspects of a system that can be implemented for producing can lids, according to various examples. Controller 802 can transmit information and / or instructions associated with system 800, such as those that can be used to perform one or more actions described herein. Controller 802 can be communicatively coupled to user interface 808, can lid forming system 810, can lid measuring system 814, and / or other related components. Controller 802 can communicate via wired or wireless connections, and controller 802 may include memory 804 and processor 806. Memory 804 and processor 806 may be included in a single structure. However, memory 804 and processor 806 may be part of a system of multiple interconnected devices.

[0123] Memory 804 may include any type of storage device that retains stored information when power is off. Memory 804 may be or include electrically erasable programmable read-only memory (“EEPROM”), flash memory, or any other type of non-volatile memory. In some examples, at least a portion of memory 804 may include a medium from which processor 806 can read instructions. Non-transitory computer-readable media may include electronic, optical, magnetic, or other storage devices capable of providing computer-readable instructions or other program code to processor 806. Non-limiting examples of computer-readable media include (but are not limited to) disks, memory chips, ROM, random access memory (“RAM”), ASICs, configured processors, optical memory, or any other medium from which a computer processor can read instructions. Instructions may include processor-specific instructions generated by a compiler or interpreter from code written in any suitable computer programming language, including, for example, C, C++, C#, etc.

[0124] Processor 806 can execute instructions stored in memory 804 to perform operations, such as operations indicated by processes 200 and / or 300, and / or receive inputs from and / or output to the user interface 808, the can lid forming system 810, and / or the can lid measuring system 814, and / or control operations of related components. Processor 806 may include one or more processing devices. Non-limiting examples of processor 806 include field-programmable gate arrays (“FPGAs”), application-specific integrated circuits (“ASICs”), microprocessors, etc.

[0125] Controller 802 may communicate with or otherwise control various components of system 800. In one example, controller 802 may interact with user interface 808 to receive input parameters to be utilized and / or present the results of evaluations or other analyses. In another example, controller 802 may control actuator 812 of can cap forming system 810 to cause can cap forming system 810 to form can caps, such as according to frame 210 of process 200 and / or frame 310 of process 300. For example, actuator 812 may be coupled to and / or include suitable punches, thinning devices, forming dies, or other tools. In yet another example, controller 802 may connect to sensor 816 of can cap measuring system 814 to receive input suitable for determining whether a can cap measured by sensor 816 conforms to a profile implemented according to process 200 and / or process 300. Non-limiting examples of suitable sensors 816 may include laser-based sensors, cameras or other optical sensors (e.g., those providing information that can withstand image recognition algorithms), profiling probes, or other tools.

[0126] Explanatory aspects The following provides a collection of exemplary aspects of the embodiments, including at least some embodiments that are explicitly listed as "aspects" providing further descriptions of various example embodiments in accordance with the concepts described herein. These aspects are not intended to be mutually exclusive, exhaustive, or limiting; and this disclosure is not limited to these example aspects but covers all possible modifications and variations within the scope of the proposed claims and their equivalents. In some aspects, an apparatus, system, or method is provided according to one or more of the following illustrative aspects or according to a combination of their elements. In some aspects, features of the apparatus or system described in one or more of these aspects may be used within a method described in one of the other aspects, and vice versa.

[0127] Aspect 1. A can lid (and may individually or in combination include any features of any other subsequent aspects), comprising: a center plate; and an annular shaped portion defining an edge of the can lid, wherein the annular shaped portion includes an inner wall, a countersunk groove, a chuck wall, and a crown, wherein the center plate has a plate height of at least 2.000 mm, wherein the total height of the shaped portion is at least 5.524 mm, wherein the internal profile offset of the shaped portion is at least 5.302 mm, and wherein the countersunk groove has a countersunk groove radius of at least 0.290 mm.

[0128] Aspect 2. The can lid as described in any of the foregoing or subsequent aspects or combinations thereof, wherein the center plate has a plate radius of at least 20.300 mm.

[0129] Aspect 3. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the plate radius is 20.300 mm to 20.500 mm.

[0130] Aspect 4. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the plate radius is from 20.351 mm to 20.408 mm.

[0131] Aspect 5. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the countersunk groove radius is from 0.290 mm to 0.650 mm.

[0132] Aspect 6. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the countersunk groove radius is from 0.315 mm to 0.550 mm.

[0133] Aspect 7. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the plate height is 2.000 mm to 3.200 mm.

[0134] Aspect 8. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the plate height is from 2.459 mm to 2.670 mm.

[0135] Aspect 9. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the total height is from 5.524 mm to 8.286 mm.

[0136] Aspect 10. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the total height is 7.054 mm to 7.176 mm.

[0137] Aspect 11. The can lid as described in any of the preceding or following aspects or any combination of aspects 1 to 10, wherein the internal profile offset is from 5.302 mm to 8.231 mm.

[0138] Aspect 12. The can lid as described in any of the preceding or following aspects or any combination of aspects 1 to 11, wherein the internal profile offset is 5.891 mm to 7.483 mm.

[0139] Aspect 13. The can lid as described in any of the foregoing or hereinafter aspects or combinations thereof, wherein the plate radius is from 20.351 mm to 20.408 mm, the plate height is from 2.459 mm to 2.670 mm, the total height is from 7.054 mm to 7.176 mm, the internal profile offset is from 5.891 mm to 7.483 mm, and the countersunk groove radius is from 0.315 mm to 0.550 mm.

[0140] Aspect 14. The can lid as described in any of the preceding or following aspects or combinations thereof, wherein the plate height is the distance from the lower end of the can lid to the plate, wherein the total height is the distance from the lower end of the can lid to the upper end of the plate, wherein the internal profile offset is the distance between the countersunk groove transition point and the center of the arc segment of the inner wall of the crown, and wherein the countersunk groove radius is the radius of the arc segment present at the lower end or inflection point of the countersunk groove.

[0141] Aspect 15. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the plate radius is the distance between the center of the central plate and the edge of the plate.

[0142] Aspect 16. A can lid (and may individually or in combination include any features of any other subsequent aspects), comprising: a center plate; and an annular shaped portion defining an edge of the can lid, wherein the annular shaped portion includes an inner wall, a countersunk groove, a chuck wall, and a crown, wherein the countersunk groove radius is the radius of an arc segment present at the lower end or inflection point of the countersunk groove, and wherein the countersunk groove radius is from 0.290 mm to 0.650 mm.

[0143] Aspect 17. The can lid as described in any of the foregoing or subsequent aspects or combinations thereof, wherein the plate height of the can lid is the vertical distance from the lower end of the can lid to the center plate, and wherein the plate height of the center plate is 2.000 mm to 3.200 mm.

[0144] Aspect 18. The can lid as described in any of the foregoing or hereinafter aspects or combinations thereof, wherein the total height of the can lid is the vertical distance from the lower end of the can lid to the upper end of the can lid, and wherein the total height of the can lid is from 5.524 mm to 8.286 mm.

[0145] Aspect 19. The can lid as described in any of the preceding or following aspects or combinations thereof, wherein the internal profile offset is a distance between the countersunk groove transition point and the center of the arc segment of the inner wall of the crown, wherein the internal profile offset is from 5.302 mm to 8.231 mm.

[0146] Aspect 20. The can lid as described in any of the foregoing or hereinafter referred to aspects or combinations thereof, wherein the plate radius is the distance between the center of the central plate and the edge of the plate, and wherein the plate radius is 20.300 mm to 20.500 mm.

[0147] As used herein, the terms “invention” and “this invention” are intended to refer broadly to all subject matter of this patent application and the following claims. Statements containing these terms should not be construed as limiting the subject matter described herein or limiting the meaning or scope of the patent claims below.

[0148] In this specification, references are made to alloys identified by AA numbers and other relevant designations such as “Series” or “5xxx”. For information on the most commonly used numerical designation systems for naming and identifying aluminum and its alloys, see the Aluminum Association’s “International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys” or “Registration Record of Aluminum Association Alloy Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingots”.

[0149] As used herein, unless the context clearly indicates otherwise, “an,” “a,” and “the” refer to both singular and plural references.

[0150] Furthermore, unless otherwise expressly stated, references in the specification to can lids (or portions thereof) as arc segments and / or having radii or radii of curvature including straight segments are included. In other words, unless otherwise expressly stated, arc segments of can lids described herein may have a radius of curvature of zero (0).

[0151] The subject matter of embodiments of this disclosure is specifically described herein to satisfy statutory requirements, but such description is not necessarily intended to limit the scope of the claims. The claimed subject matter may be embodied in other ways, may include different elements or steps, and may be used in conjunction with other existing or future technologies. This description should not be construed as implying any particular order or arrangement of the various steps or elements, except where the order of the arrangement of the various steps or elements is clearly described. Directional references such as “up,” “down,” “top,” “bottom,” “left,” “right,” “vertical,” “horizontal,” “lateral,” “longitudinal,” “front,” and “rear” are intended to refer to the orientation shown and described in one or more of the accompanying drawings to which the component and orientation are referenced.

[0152] The terms “comprising,” “having,” “including,” and “containing” should be interpreted as open-ended terms (i.e., meaning “including but not limited to”) unless otherwise indicated. All methods described herein may be performed in any suitable order unless otherwise specified herein or otherwise clearly contradicted by the context. The use of any and all example or exemplary language (e.g., “such as”) provided herein is intended only to better illustrate embodiments of the invention and, unless otherwise required, does not limit the scope of the invention. The language in this specification should not be construed as indicating any non-claimed element as necessary for practicing the invention.

[0153] The foregoing aspects are merely possible examples of embodiments, set forth only for the purpose of clearly understanding the principles of this disclosure. Many changes and modifications may be made to the embodiments described above without departing substantially from the spirit and principles of this disclosure. All such modifications and variations are intended to be included within the scope of this disclosure, and all possible claims relating to aspects or combinations of elements or steps are intended to be supported by this disclosure. Furthermore, although specific terminology is used herein and in the appended claims, such specific terminology is used in a general and descriptive sense only and is not intended to limit the described embodiments or the purpose of the appended claims.

Claims

1. A can lid comprising: Center plate; and An annular irregular portion, defining the edge of the can lid, wherein the annular irregular portion includes an inner wall, a countersunk groove, a chuck wall, and a crown. The height of the center plate is at least 2.000 mm. The total height of the irregularly shaped portion is at least 5.524 mm. The internal contour offset of the irregular portion is at least 5.302 mm, and The countersunk groove has a countersunk groove radius of at least 0.290 mm.

2. The can lid as claimed in claim 1, wherein the radius of the center plate is at least 20.300 mm.

3. The can lid as claimed in any one of claims 1 to 2, wherein the plate radius is 20.300 mm to 20.500 mm.

4. The can lid according to any one of claims 1 to 3, wherein the plate radius is 20.351 mm to 20.408 mm.

5. The can lid according to any one of claims 1 to 4, wherein the countersunk groove radius is 0.290 mm to 0.650 mm.

6. The can lid according to any one of claims 1 to 5, wherein the countersunk groove radius is from 0.315 mm to 0.550 mm.

7. The can lid as claimed in any one of claims 1 to 6, wherein the plate height is 2.000 mm to 3.200 mm.

8. The can lid as claimed in any one of claims 1 to 7, wherein the plate height is 2.459 mm to 2.670 mm.

9. The can lid as claimed in any one of claims 1 to 8, wherein the total height is from 5.524 mm to 8.286 mm.

10. The can lid as claimed in any one of claims 1 to 9, wherein the total height is 7.054 mm to 7.176 mm.

11. The can lid as claimed in any one of claims 1 to 10, wherein the internal profile offset is from 5.302 mm to 8.231 mm.

12. The can lid as claimed in any one of claims 1 to 11, wherein the internal profile offset is 5.891 mm to 7.483 mm.

13. The can lid according to any one of claims 1 to 12, wherein the plate radius is 20.351 mm to 20.408 mm, wherein the plate height is 2.459 mm to 2.670 mm, wherein the total height is 7.054 mm to 7.176 mm, wherein the internal profile offset is 5.891 mm to 7.483 mm, and wherein the countersunk groove radius is 0.315 mm to 0.550 mm.

14. The can lid as claimed in any one of claims 1 to 13, wherein the plate height is the distance from the lower end of the can lid to the plate, wherein the total height is the distance from the lower end of the can lid to the upper end of the plate, wherein the internal profile offset is the distance between the countersunk groove transition point and the center of the arc segment of the inner wall of the crown, and wherein the countersunk groove radius is the radius of the arc segment existing at the lower end or inflection point of the countersunk groove.

15. The can lid as claimed in any one of claims 1 to 15, wherein the plate radius is the distance between the center of the central plate and the edge of the plate.

16. A can lid comprising: Center plate; and An annular irregular portion, defining the edge of the can lid, wherein the annular irregular portion includes an inner wall, a countersunk groove, a chuck wall, and a crown. The countersunk groove radius is the radius of the arc segment existing at the lower end or inflection point of the countersunk groove, and The countersunk groove radius is 0.290 mm to 0.650 mm.

17. The can lid of claim 16, wherein the height of the can lid plate is the vertical distance from the lower end of the can lid to the center plate, and wherein the height of the center plate is 2.000 mm to 3.200 mm.

18. The can lid as claimed in any one of claims 16 to 17, wherein the total height of the can lid is the vertical distance from the lower end of the can lid to the upper end of the can lid, and wherein the total height of the can lid is 5.524 mm to 8.286 mm.

19. The can lid of any one of claims 16 to 18, wherein the internal profile offset is a distance between the transition point of the countersunk groove and the center of the arc segment of the inner wall of the crown, wherein the internal profile offset is 5.302 mm to 8.231 mm.

20. The can lid according to any one of claims 16 to 19, wherein the plate radius is the distance between the center of the central plate and the edge of the plate, and wherein the plate radius is 20.300 mm to 20.500 mm.

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