WO2021231351A1 - Ecology tab, can end, tooling and method - Google Patents

Ecology tab, can end, tooling and method Download PDF

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Publication number
WO2021231351A1
WO2021231351A1 PCT/US2021/031677 US2021031677W WO2021231351A1 WO 2021231351 A1 WO2021231351 A1 WO 2021231351A1 US 2021031677 W US2021031677 W US 2021031677W WO 2021231351 A1 WO2021231351 A1 WO 2021231351A1
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WO
WIPO (PCT)
Prior art keywords
tab
length
inch
die
bead
Prior art date
Application number
PCT/US2021/031677
Other languages
French (fr)
Inventor
Dennis C. Stammen
Robert J. Will
Christopher L. MACKE
Patrick K. MCCARTY
Robert H. Brussell
Greg S. Williams
Steven T. ALBRIGHT
Original Assignee
Stolle Machinery Company, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stolle Machinery Company, Llc filed Critical Stolle Machinery Company, Llc
Priority to JP2022568445A priority Critical patent/JP2023525310A/en
Priority to EP21803590.5A priority patent/EP4149852A1/en
Priority to CN202180028305.1A priority patent/CN115427309A/en
Publication of WO2021231351A1 publication Critical patent/WO2021231351A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/34Arrangement or construction of pull or lift tabs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00Making hollow objects
    • B21D51/16Making hollow objects characterised by the use of the objects
    • B21D51/38Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/44Making closures, e.g. caps
    • B21D51/443Making closures, e.g. caps easily removable closures, e.g. by means of tear strips
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00Making hollow objects
    • B21D51/16Making hollow objects characterised by the use of the objects
    • B21D51/38Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4012Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening partially by means of a tearing tab
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2517/00Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001Details
    • B65D2517/0058Other details of container end panel
    • B65D2517/0059General cross-sectional shape of container end panel
    • B65D2517/0061U-shaped
    • B65D2517/0062U-shaped and provided with an additional U-shaped peripheral channel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2517/00Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001Details
    • B65D2517/0058Other details of container end panel
    • B65D2517/0068Ribs or projections in container end panel
    • B65D2517/0071Ribs or projections in container end panel located externally of tear-out/push-in panel or preformed opening
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2517/00Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001Details
    • B65D2517/0058Other details of container end panel
    • B65D2517/0074Local recess in container end panel
    • B65D2517/0076Local recess in container end panel located beneath tab contact point
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2517/00Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001Details
    • B65D2517/0058Other details of container end panel
    • B65D2517/0074Local recess in container end panel
    • B65D2517/0079Local recess in container end panel located beneath tab hand grip to facilitate initial lifting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2517/00Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5072Details of hand grip, tear- or lift-tab
    • B65D2517/5075Hand grip with finger opening

Abstract

A reduced length ecology tab is provided for a can end. The can end includes an end panel and a rivet affixing the tab to the end panel. The tab includes a body having first and second opposing ends, and a length measured by the distance between the first end and the second end. A nose portion is disposed at or about the first end, and a lift portion is disposed at or about the second end. The length of the tab is less than 0.985 inch.

Description

ECOLOGY TAB, CAN END, TOOLING AND METHOD
CROSS REFERENCE TO RELATED APPLICATION
This application is a traditional application of and claims priority to U.S. Provisional Patent Application Serial No. 63/022,608, filed May 11, 2020 entitled, ECOLOGY TAB, CAN END, TOOLING AND METHOD, which is hereby incorporated herein by reference.
BACKGROUND Field
The disclosed concept relates generally to containers and more particularly, to ecology tabs and can ends for containers, such as beer and beverage cans. The disclosed concept also relates to tooling and associated methods for the manufacture of ecology tabs and can ends.
Background Information
Metallic containers (e.g., cans) for holding products such as, for example, liquids, beverages, or food products, are typically provided with an easy open can end on which an opening mechanism, such as a pull tab, is attached (e.g., without limitation, riveted) to a tear strip or severable panel. Typically, the tear strip is defined by a scoreline in the exterior surface (e.g., public side) of the can end. The pull tab, commonly referred to simply as the “tab,” is structured to be lifted, pulled, and/or rotated to sever the scoreline and deflect the tear strip, thereby creating an opening for dispensing the contents of the can.
When the can end is made, it originates as a can end shell, which is formed from a sheet metal product (e.g., without limitation, sheet aluminum; sheet steel). The shell is then conveyed to a conversion press, which has a number of successive tool stations. As the shell advances from one tool station to the next, conversion operations such as, for example and without limitation, rivet forming, paneling, scoring, embossing, tab forming, tab securing and tab staking, are performed until the shell is fully converted into the desired can end and is discharged from the press. Typically, tooling for each tool station of the conversion press includes an upper tool member, which is structured to be advanced towards a lower tool member upon actuation of a press ram. The upper and/or lower tool members cooperate to perform a number of the aforementioned conversion operations. Upon completion of a given operation, the press ram retracts the upper tool member and the partially converted shell or tab is moved to the next successive tool station, or the tooling is changed within the same station, to perform the next conversion operation.
In the canmaking industry, there is an ongoing desire to reduce the amount of metal required to be used in the manufacture of the container and components thereof (e.g., can end; tab; can body). In addition to reducing cost, minimizing the amount of metal required has an ecological impact that is good for the environment. Prior proposals for addressing these issues suffer from various disadvantages. Among them, are complexity of design of the tab and/or can end, and strength and operating mechanics considerations of the tab and/or can end. Consequently, some known designs, which have attempted to achieve metal savings, are too costly and/or impractical to produce, or fail to achieve the desired result. Many known designs also require substantial modification or complete redesign of the tab, the can end, or both, which undesirably necessitates completely new tooling and forming methods.
There is, therefore, room for improvement in tabs and can ends for containers, such as beer and beverage cans, and in associated tooling and methods.
BRIEF DESCRIPTION OF THE DRAWINGS
A full understanding of the disclosed concept can be gained from the following description of the preferred embodiments when read in conjunction with the accompanying drawings in which:
Figure 1 is a top perspective view of a tab in accordance with an embodiment of the disclosed concept;
Figure 2 is another top perspective view of the tab;
Figure 3 is a bottom perspective view of the tab;
Figure 4 is another bottom perspective view of the tab;
Figure 5 is a top plan view of the tab;
Figure 6 is a bottom plan view of the tab;
Figure 7 is a side elevation view of the tab;
Figure 8 is a section view taken in the direction of line 8-8 shown in Figure 5;
Figure 9 is a front end elevation view of the tab; Figure 10 is a back end elevation view of the tab;
Figure 11 A is a top perspective view of a can end and tab in accordance with an embodiment of the disclosed concept;
Figure 1 IB is a top perspective view of the can end of Figure 11 A, shown without the tab;
Figure 12A is another top perspective view of the can end and tab of Figure 11 A; Figure 12B is another top perspective view of the can end of Figure 1 IB;
Figure 13 is a bottom perspective view of the can end;
Figure 14 is another bottom perspective view of the can end of Figure 13;
Figure 15A is a top plan view of the can end and tab of Figure 11A;
Figure 15B is a top plan view of the can end of Figure 1 IB;
Figure 16 is a bottom plan view of the can end;
Figure 17 is a side elevation view of the can end;
Figure 18A is a section view taken in the direction of line 18 A- 18 A shown in Figure 15 A;
Figure 18B is a section view taken in the direction of line 18B-18B shown in
Figure 15B;
Figure 19 is a simplified section view of tooling in accordance with an embodiment of the disclosed concept;
Figure 20 is an enlarged section view of a portion of the tooling of Figure 19; Figures 21 and 22 are top plan views, respectively, showing differences of a new tab in accordance with an embodiment of the disclosed concept compared to a conventional tab;
Figure 23 is a top plan view showing the public side (i.e., outside or exterior) of a conventional can end and tab;
Figure 24 is a top plan view showing the public side of a new can end and tab in accordance with an embodiment of the disclosed concept;
Figure 25 is a bottom plan view showing the product side (i.e., inside or interior) of the conventional can end and tab of Figure 23;
Figure 26 is a bottom plan view of the new can end and tab of Figure 24;
Figure 27 is a top plan view of a portion of a conventional conversion press system forming the conventional can end and tab of Figures 23 and 25, with a portion of the conversion press shown in simplified form in phantom line drawing; and Figure 28 is a top plan view of a portion of a conversion press forming the new can end and tab of Figures 24 and 26, with a portion of the conversion press shown in simplified form in phantom line drawing.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
For purposes of illustration, embodiments of the disclosed concept will be described as applied to tabs and can ends for beverage/beer cans, although it will become apparent that they could also be employed to other contains such as, for example and without limitation, cans for liquids other than beer and beverages, and food cans.
It will be appreciated that the specific elements illustrated in the figures herein and described in the following specification are simply exemplary embodiments of the disclosed concept, which are provided as non-limiting examples solely for the purpose of illustration. Therefore, specific dimensions, orientations and other physical characteristics related to the embodiments disclosed herein are not to be considered limiting on the scope of the disclosed concept.
Directional phrases used herein, such as, for example, left, right, front, back, top, bottom, upper, lower and derivatives thereof, relate to the orientation of the elements shown in the drawings and are not limiting upon the claims unless expressly recited therein.
As employed herein, the terms “can” and “container” are used substantially interchangeably to refer to any known or suitable container, which is structured to contain a substance (e.g., without limitation, liquid; food; any other suitable substance), and expressly includes, but is not limited to, food cans, as well as beverage cans, such as beer and soda cans.
As employed herein, the term “can end” refers to the lid or closure that is structured to be coupled to a can, in order to seal the can.
As employed herein, the term “can end shell” is used substantially interchangeably with the term “can end.” The “can end shell” or simply the “shell” is the member that is acted upon (e.g., without limitation, formed) and is converted by the disclosed tooling to provide the desired can end.
As employed herein, the statement that two or more parts are “coupled” together shall mean that the parts are joined together either directly or joined through one or more intermediate parts. As employed herein, the term “number” shall mean one or an integer greater than one (i.e., a plurality).
Figures 1-10 and 21 show a tab 2 in accordance with one non-limiting embodiment of the disclosed concept. The tab 2 includes a body 4 having opposing first and second ends 6,8. A nose portion 10 is located at or about the first end 6 (i.e., front) of the tab 2, and a lift portion 12 is located at or about the second end 8 (i.e., back) of the tab 2. As shown in Figures 1-6 and 21, a rivet receiving portion 14 is disposed proximate the nose portion 10, and includes a rivet hole 16.
The tab 2 in the non-limiting example shown and described herein is a reduced length ecology tab for use on an easy open beer/beverage can end 200 (see, e.g., without limitation, Figures 11 A-l 8, 24; see also tab 200’ in Figure 26). By way of one nonlimiting example, it will be appreciated that a conventional tab 102 (see, for example, Figure 22) has a length 150 of about 0.985 inch, whereas a reduced length ecology tab 2 in accordance with the disclosed concept (see, for example, Figure 21) has a length 50 of between 0.810-0.950 inch, and preferably only about 0.860 inch. Continuing to refer to
Figures 21 and 22, it will be appreciated the width 52 of the reduced length ecology tab 2, measured at the widest portion of the tab 2 as shown in Figure 21, is generally similar to the width 152 of the conventional tab 150, also measured at the widest portion of the tab 102 as shown in Figure 22. By way of one non-limiting example embodiment, the conventional tab 150 may have a width 152 of about 0.620 inch, and the reduced length ecology tab 2 may have a width 52 of about 0.616 inch. It will be appreciated, however, that in other embodiments (not shown), the tabs (e.g., 2, 102) could have the same width (e.g., 52, 152), without departing from the scope of the invention. The thickness of the reduced length ecology tab 2 is also preferably substantially the same as the thickness of conventional tabs (e.g., without limitation, tab 102 of Figure 22).
The aspect ratio (i.e., length divided by width) of the tab 2 is also unique. That is, the aspect ratio is preferably between 1.5:1 to 1.30:1 and, more preferably, is about 1.396: 1. By comparison, the aspect ratio of the conventional tab 102 of Figure 22 is 1.589: 1. It will therefore be appreciated that the length 50 of tab 2 is preferably between 0.035-0.175 inch shorter than a conventional tab, and more preferably is about 0.125 inch shorter than a conventional tab (see and compare, for example, new reduced length ecology tab 2 compared to conventional tab 102, shown side-by-side in Figures 27 and 28). In accordance with one aspect of the disclosed concept, the tab 2 was strategically designed around a progression length 702, which would allow relatively easy retrofit into an existing machine 700 (e.g., without limitation, a 1.1500 inch tab progression Tetrad machine (partially shown in simplified form in Figure 28)). More specifically, it is generally well known in the art of progressive die stamping that the “progression length” refers to the distance or pitch between die stations. Accordingly, it is generally understood that any change in progression length would necessarily require extensive and costly modification to the associated tooling. Among other unique improvements, the reduced length ecology tab 2 is significantly shorter in length 50 (Figures 7, 8 and 21) compared to the length 150 (Figure 22) of a conventional tab 102 (Figure 22), and through extensive research and design efforts a unique progression length 702 (Figure 28) has been discovered and implemented that is different from the progression length 602 (Figure 27) of the prior art tooling 600 (Figure 27), yet the new tab 2 can be incorporated or retrofitted into existing machinery (e.g., without limitation, prior art conversion press 600 of Figure 27). In the example shown and described with respect to Figures 27 and
28, the existing tab die progression length 602 of the prior art conversion press 600 is preferably reduced from 1.1500 inch to a tab die progression length 702 of between 1.0857 inch and 0.8857 inch and, more preferably, to a tab die progression length 702 of about 0.9857 inch.
Referring to Figures 1-5, for example, in accordance with another aspect of the disclosed concept, the reduced length ecology tab 2 utilizes the same geometry and known technology on the front half or front portion (see segment 60 of tab 2 in Figure 5) of the tab 2 (i.e., the aforementioned “nose” 10). The aforementioned reduced tab length 50 is therefore achieved exclusively from the back half or back portion (see segment 70 of tab 2 in Figure 5) of the tab 2 (i.e., the aforementioned “lift portion” 12 or finger hole area 18). That is, a major distinctive feature of the disclosed tab 2 is a smaller finger hole 18 and, thus, a shorter overall tab length 50. It will be appreciated that such a reduction in tab length 50 results in increased opening forces, which provides the largest technical challenge and largest obstacle for customer acceptance.
A significant advantage of the disclosed reduced length ecology tab 2 is metal- savings. That is, there is a significant reduction in the amount of metal (e.g., without limitation, aluminum) required per tab 2. This results in significant tab cost savings over time. Another advantage of the disclosed reduced length ecology tab 2 is the enhanced finger access that is gained on smaller diameter can ends 200 (Figures 11A-18B; see also can end 200’ of Figures 24 and 26). For example and without limitation, diameter 200 and smaller can ends 200 do not allow enough finger access when employing a conventional tab of standard length (e.g., tab 102 of Figure 22). As shown in Figure 15 A, for example, this is because there is relatively little available space available on the center panel 202 of the can end 200. That is, the diameter 204 of the center panel 202 of a conventional 200 diameter can end 200 is typically in the range of between about 1.780 inches to about 1.650 inches leaving relatively little remaining space for the tab 2, tear panel 206 and other features.
Accordingly, among other distinct features and benefits, the reduced length (e.g., without limitation, 0.9857 inch) ecology tab 2 has the following distinctive features:
1. Same nose portion 10 (e.g., segment 60 in Figure 5) and, therefore, same performance advantages as known tabs;
2. Smaller finger hole 18 (Figures 1-5) and increased finger access;
3. Reduced overall length 50;
4. Substantially similar tab thickness as previous standard tabs; and/or
5. Improved metal efficiency and economy (e.g., less metal).
It will be appreciated that a reduced length ecology tab 2 in accordance with alternative embodiments (not shown) of the disclosed concept could have different measurements and features (not shown), as well as a different size, shape or geometry (not shown), without departing from the scope of the disclosed concept. For example and without limitation, the tab 2 could be made from material (e.g., without limitation, aluminum) having a reduced gauge (i.e., thinner). Additionally, or alternatively, by way of example and without limitation, the reduced length concept could be employed with a tab that has a solid lift portion (i.e., no finger thru hole), commonly known as a “promotional” or “promo” tab.
As best shown in the section view of Figure 18A, the rivet hole 16 is structured to receive a rivet 214, which is staked to fasten the rivet receiving portion 14 of the tab 2 to a can end 200, see also, Figure 15 A.
Figures 11 A, 12 A, 15A and 18A show an example of a can end 200 employing the tab 2, in accordance with one non-limiting example embodiment of the disclosed concept. It will be appreciated, however, that a tab 2 in accordance with the disclosed concept could alternatively be employed with can ends having any other known or suitable alternative size (not shown), geometry (not shown), and/or configuration of features (e.g., without limitation, shell type, size and shape; score line and/or tear panel size and/or shape; panel size and/or shape)(not shown), without departing from the scope of the disclosed concept. For example and without limitation, Figures 24 and 26 show one non-limiting alternative embodiment of a different type of can end 200’ employing a tab 2 in accordance with the disclosed concept.
Figures 1 IB, 12B, 15B and 18B show the aforementioned example can end 200, without the tab, to better show unique features of the can end 200, in accordance with aspects of one non-limiting example embodiment of the disclosed concept. It will be appreciated with reference to Figures 13, 14, 16 and 17, that the product side (i.e., inside, interior or bottom) and side elevation views of the can end 200 appear the same whether or not the tab 2 (Figures 1-10, 11A, 12 A, 15 A, 18 A, 21, 24 and 26) is affixed to the can end 200.
Referring to Figure 15 A, for example, among other features, the can end 200 includes an end panel or center panel 202 and a scoreline 205, which defines a tear panel 206. Accordingly, when the tab 2 is actuated (e.g., without limitation, lifted and pivoted or rotated) it will sever the scoreline 205 about the tear panel 206, and depress the tear panel 206 downward, thereby providing an opening in the can end 200 for dispensing the contents of the container or can to which the can end 200 is affixed.
In the example shown and described herein, the can end 200 has several additional distinctive features. As best shown in Figures 1 IB, 12B and 15B, the end panel 202 includes arc-shaped beads 216, 218, see also, arc-shaped beads 216’, 218’ on panel 202’ of can end 200’ in Figure 26, designed to fit under the reduced length ecology tab 2 to provide stiffness behind the rivet thereby enhancing opening performance. The end panel 202 of the example can end 200 further includes locating beads 220, 222 (see also locating beads 220’, 222’ of can end 200’ of Figure 26), which function to locate the part as it is being formed by tooling (see tooling 500 in Figures 19, 20 and 28) and methods (e.g., without limitation, a progressive die tooling process as best shown in Figures 27 and 28) in accordance with aspects of the disclosed concept. Linear beads 224, 226 may also be optionally included, as shown for example and without limitation in the alternative example embodiment of Figures 24 and 26. Such linear beads 224, 226 function to further stiffen the end panel 202’ of the can end 200’. It will be appreciated that this unique combination of features is significantly different from the prior art end panel 302, shown in Figure 25 and, in particular, the bead 304 commonly referred to in the art as a “cent bead.”
Many of the foregoing features can also be seen from the product side (e.g., interior or inside) of the can end 200, 200’, as shown for example in Figures 13, 14, 16 and 26.
As noted above, another unique feature and advantage of the disclosed concept is enhanced finger access to facilitate easier access for the finger of a user to lift the tab 2 and thereby open the associated container or can (not shown). More specifically, as best shown with reference to Figures 23-26, the reduced length ecology tab 2 results in the second end 8 of the tab body 4, and thus the lift portion 12 and figure hole 18, being disposed a greater distance 208’ (Figure 24) from the outer edge or perimeter 210’
(Figure 24) of can end 200’ (Figure 24) than prior art designs (see and compare the prior art can end 300 and smaller distance 308 between tab 102 and outer edge 310 shown in Figures 23 and 25, to the new can end 200’ shown in Figures 24 and 26; see also, distance 208 between tab 2 and the outer edger 210 of can end 200 of Figure 15A). In the nonlimiting example embodiments of Figures 15A and 24, the improvement in finger access is directly attributed to the distance 208 (Figure 15 A), 208’ (Figure 24) preferably being between 0.325-0.500 inch and, more preferably being about 0.414 inch compared to the distance 308 (Figure 23), which is less than 0.300 inch. The embodiments of Figures 15A and 24 also include an optional finger well or recess 212 (Figure 15 A) 212’ (Figure 24) in the end panel 202 (Figure 15 A), 202’ (Figure 24), which still further improves finger access by a user by allowing the user’s finger to reach under the lift portion 12 of the tab 2 to further facilitate operation thereof. The magnitude of this difference will be even further appreciated when recognizing that the prior art can end 300 of Figures 23 and 25 is a larger diameter can end (e.g., a 202 diameter can end 300) compared to the smaller 200 diameter can end 200, 200’ (Figures 24 and 26) shown and described herein with respect to the reduced length ecology tab 2 of the disclosed concept. Thus, it will be appreciated that a conventional tab 102 having a standard length 150 (Figure 22) disposed on the smaller diameter can end 200, 200’ would result in even less finger access space than the distance 308, shown in Figure 23. As shown, it will be appreciated, that the reduced tab length 50 also allows for the overall size (e.g., diameter 204 (Figure 15 A)) of the associated can end 200 to be reduced, if desired, which would advantageous 1 y result in even further metal savings.
Figures 19 and 20 show a non-limiting example of tooling 500 for forming a reduced length ecology tab 2 in accordance with aspects of the disclosed concept. The tooling 500 includes an upper tooling assembly 502 and a lower tooling assembly 504 each having a plurality of opposing tools that cooperate in order to form features of the tab 2. In the non-limiting example of Figures 19 and 20, the tooling 500 shown is structured to form the tongue wipe down, finger hole precurl, panel and coin pre-curl operations associated with forming the tab 2. It will be appreciated, however, that additional tooling (e.g., without limitation, one or more additional forming stations (not shown)) could be employed to form the reduced length ecology tab 2 in accordance with the disclosed concept.
As previously discussed, Figure 21 shows a reduced length tab 2 in accordance with a non-limiting example embodiment of the disclosed concept compared to the standard length of a convention tab 102, shown in Figure 22. The dimensions provided are not intended to restrict the scope of the disclosed concept, but rather are provided merely for purposes of illustration to show a non-limiting example of reduced tab length 50 and other features that can be achieved by the disclosed concept.
Similarly, Figures 23-26 provide another non-limiting example, for purposes of comparing a convention can end 300 employing a convention tab 102 to a reduced size can end 200’ employing a reduced length tab 2 in accordance with aspects of one non- limiting embodiment of the disclosed concept. Specifically, Figures 23 (prior art) and 24 show the public sides (e.g., outsides or exteriors) of the can ends 200’, 300, and Figures 25 (prior art) and 26 show the product sides (e.g., insides or interiors) of the can ends
200’, 300.
Figure 27 shows a portion of a conversion press system 600 forming the conventional can end 300 and tab 102 of Figures 23 and 25, with a portion of the conversion press 600 shown in simplified form in phantom line drawing. Similarly, Figure 28 shows a portion of a conversion press 700 forming the new can end 200’ and tab 2 of Figures 24 and 26, with a portion of the conversion press 700 shown in simplified form in phantom line drawing. It will be appreciated with reference to, and comparison of, Figures 27 and 28 that certain dimensions between and among components of the prior art conversion press 600 (Figure 27) and the conversion press 700 (Figure 28) for forming the new tab 2 in accordance with the disclosed concept are similar enough to avoid requiring completely new lane dies and feed equipment In more detail, the aforementioned unique tab die progression length 702 of the disclosed concept was researched and developed extensively to achieve a dimension that permits the transfer belt centerline dimension 704 (Figure 28) to remain substantially unchanged from the transfer belt centerline dimension 604 (Figure 27). Preferably, the lane die progression length 706 (Figure 28) also remains substantially unchanged from the prior art lane die progression length 606 (Figure 27). Accordingly, as previously discussed hereinabove, an additional significant advantage of the disclosed concept is that the reduced length ecology tab 2 can be implemented or retrofitted within existing conversion systems (e.g., 600).
It will be appreciated that features of the disclosed concept can be employed independently, without certain other aspects for features, in accordance with some embodiments of the disclosed concept, whereas in other embodiments all of the aforementioned features can be employed in combination. It will further be appreciated with reference to for example and without limitation, Figures 23-26, that the new tab 2 and can end 200’ designs in some instances may remove or eliminate the requirement of features required in prior art designs.
Accordingly, the disclosed concept provides a reduce length tab 2, providing a number of advantages, and further provides for an improved can end 200, 200’, tooling
500, 700 and associated methods, which individually and collectively achieve significant metal savings and ecological benefit.
While specific embodiments of the invention have been described in detail, it will be appreciated by those skilled in the art that various modifications and alternatives to those details could be developed in light of the overall teachings of the disclosure.
Accordingly, the particular arrangements disclosed are meant to be illustrative only and not limiting as to the scope of disclosed concept which is to be given the full breadth of the claims appended and any and all equivalents thereof.

Claims

What is claimed is:
1. A tab for a can end, the tab comprising: a body including a first end, a second end disposed opposite and distal from the first end, and a length measured by the distance between the first end and the second end; a nose portion disposed at or about the first end; and a lift portion disposed at or about the second end, wherein the length of the tab is less than 0.985 inch.
2. The tab of claim 1 wherein the length is between 0.810 inch and 0.950 inch.
3. The tab of claim 2 wherein the length is about 0.860 inch.
4. The tab of claim 1 wherein the body of the tab further includes a width; and wherein the width is about 0.616 inch.
5. The tab of claim 1 wherein the tab has an aspect ratio of between 1.5:1 to
1.30:1.
6. The tab of claim 5 wherein the tab has an aspect ratio of 1.396:1.
7. The tab of claim 1 wherein the nose portion includes a rivet receiving portion; wherein the body further includes an intermediate portion disposed approximately half way between the nose portion and the lift portion to define a first segment of the tab body and a second segment of the tab body; wherein the first segment extends from the intermediate portion to the first end; and wherein the second segment extends from the intermediate portion to the second end.
8. The tab of claim 1 wherein the lift portion includes a finger hole; and wherein the finger hole comprises a symmetrical oblong opening having two opposing parallel segments extending laterally across the width of the lift portion.
9. A can end comprising: an end panel; a rivet; and a tab affixed to the end panel by the rivet, wherein the tab comprises: a body including a first end, a second end disposed opposite and distal from the first end, and a length measured by the distance between the first end and the second end; a nose portion disposed at or about the first end; and a lift portion disposed at or about the second end, wherein the length of the tab is less than 0.985 inch.
10. The can end of claim 9 wherein the length of the tab is between 0.810 inch and 0.950 inch.
11. The can end of claim 9 wherein the tab has an aspect ratio of between
1.5:1 to 1.30:1.
12. The can end of claim 9 wherein the lift portion of the tab includes a finger hole, and wherein the finger hole comprises a symmetrical oblong opening having two opposing parallel segments extending laterally across the width of the lift portion.
13. The can end of claim 9 wherein the end panel comprises a score line defining a tear panel, a first arc-shaped bead, and a second arc-shaped bead; and wherein the first arc- shaped bead and the second arc-shaped bead are disposed beneath the tab.
14. The can end of claim 14 wherein the first arc-shaped bead is disposed opposite the second arc-shaped bead; wherein the end panel further comprises a first locating bead and a second locating bead; wherein the first locating bead is disposed adjacent the first arc -shaped bead; and wherein the second locating bead is disposed adjacent the second arc-shaped bead.
15. The can end of claim 9 wherein the end panel further comprises a first linear bead and a second linear bead; and wherein the tab body is disposed between the first linear bead and the second linear bead.
16. The can end of 9 wherein the end panel further comprises a diameter and an outer perimeter; wherein the second end of the tab is disposed a distance from the outer perimeter of the end panel in order to provide finger access to the lift portion of the tab; and wherein the distance is between 0.325 inch and 0.500 inch.
17. The can end of claim 9 wherein the end panel further comprises a finger well; and wherein the second end of the tab body is disposed adjacent to the finger well to provide access to lift portion of the tab.
18. A method of forming a can end including a reduced length tab, the method comprising: providing a conversion press including at least one tab die and at least one lane die, forming a plurality of can ends from shells fed through the at least one lane die, forming a plurality of tabs from tab stock fed through the at least one tab die, and riveting the tabs to the can ends, wherein the step of forming the tabs comprises forming each tab to have a body including a first end, a second end disposed opposite and distal from the first end, and a length measured by the distance between the first end and the second end, wherein the length of the tab is less than 0.985 inch.
19. The method of claim 18, further comprising: providing the at least one tab die with a tab die progression length, providing a first lane die having a first transfer belt, a first centerline, and a first lane die progression length, providing a second lane die having a second transfer belt, a second centerline, and a second lane die progression length that is the same as the first lane die progression length, and modifying the conversion press to change from a first configuration in which tabs are formed to have a first length to a second configuration in which tabs are formed to have a second length that is shorter than the first length, wherein the step of modifying the conversion press comprises changing the tab die progression length while maintaining substantially the same measurement between the first centerline of the first transfer belt and the second centerline of the second transfer belt, and maintaining substantially the same first lane die progression length and second lane die progression length.
20. The method of claim 19, further comprising providing the at least one tab die with a tab die progression length of about 0.9857 inch.
PCT/US2021/031677 2020-05-11 2021-05-11 Ecology tab, can end, tooling and method WO2021231351A1 (en)

Priority Applications (3)

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JP2022568445A JP2023525310A (en) 2020-05-11 2021-05-11 Ecology tabs, can ends, tooling and methods
EP21803590.5A EP4149852A1 (en) 2020-05-11 2021-05-11 Ecology tab, can end, tooling and method
CN202180028305.1A CN115427309A (en) 2020-05-11 2021-05-11 Ecological tab, can end, tool and method

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US202063022608P 2020-05-11 2020-05-11
US63/022,608 2020-05-11

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EP (1) EP4149852A1 (en)
JP (1) JP2023525310A (en)
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USD976704S1 (en) * 2020-05-11 2023-01-31 Stolle Machinery Company, Llc Can end
USD959980S1 (en) * 2020-05-11 2022-08-09 Stolle Machinery Company, Llc Ecology tab
USD999631S1 (en) * 2021-07-23 2023-09-26 Stolle Machinery Company, Llc Ring pull tab

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US20120273492A1 (en) * 2011-04-26 2012-11-01 Jeffrey J. Meinerz Ergonomic Stay-On Tab
US20150239607A1 (en) * 2012-10-01 2015-08-27 Crown Packaging Technology, Inc. Beverage can ends suitable for small diameters
US20140271044A1 (en) * 2013-03-15 2014-09-18 Stolle Machinery Company, Llc Conversion press

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JP2023525310A (en) 2023-06-15
CN115427309A (en) 2022-12-02
US20210347526A1 (en) 2021-11-11
EP4149852A1 (en) 2023-03-22

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