Method of retaining a token in a ring pull or lever

• US 5,191,695 A
• Filed: 10/23/1991
• Issued: 03/09/1993
• Est. Priority Date: 10/25/1990
• Status: Expired due to Fees

• Current Assignee: Carnaud Metalbox Plc (Crown Holdings Incorporated)
• Original Assignee: Carnaud Metalbox Plc (Crown Holdings Incorporated)
• Inventors: White, David M., Pavely, Andrew P., Foskett, Peter S., Marr, Roy J.
• Primary Examiner(s): Eley, Timothy V.
• Application Number:
  US07/781,693
• Time in Patent Office: 503 Days
• Field of Search: 29/411, 29/413, 29/414, 29/417, 29/418, 29/451, 29/506, 29/521, 29/525, 29/509, 40/27.5, 40/306, 40/307, 220/269, 220/270, 220/273
• US Class Current: 29/451
• CPC Class Codes: B65D 17/4012 for opening partially by means of a tearing tab
• CPC Class Codes: B65D 2517/0014 pivot tab and push-down tear panel
• CPC Class Codes: B65D 2517/0053 forming part of, or connected to, the tab
• CPC Class Codes: B65D 2517/0062 and provided with an additional U-shaped peripheral channel
• CPC Class Codes: B65D 77/24 Inserts or accessories added or incorporated during filling of containers opening devices B65D77/30
• CPC Class Codes: G09F 23/02 the advertising matter being displayed by the operation of the article
• CPC Class Codes: Y10T 29/49872 Confining elastic part in socket
• CPC Class Codes: Y10T 29/49936 Surface interlocking
• CPC Class Codes: Y10T 29/5142 and means to sever work from supply
• CPC Class Codes: Y10T 29/53387 by deforming
• CPC Class Codes: Y10T 29/53422 by deforming

Abstract

A can end (1) having an openable portion (14) defined by a score line (13), has a ring pull defining an aperture in which is retained a token (16) which may be removed as proof of purchase to qualify the purchaser for a prize or other premium offer. The token (16) is preferably made from a plastics material which is retained by clinching of peripheral material of the ring pull, and may be marked with indicia.

Claims

1. A method of retaining a token in a ring pull or lever, said method being characterised by the steps of feeding a strip of material including token portions to a parting station, applying pressure to the strip to part a token from the strip and apply the parted token to the lever or ring pull, and clinching a peripheral portion of the material of the lever or ring pull into engagement with the token.

2. A method according to claim 1, wherein the strip of material including the token portion is formed by casting or moulding a pair of elongate members as feeders joined by a plurality of moulded tokens.

3. A method according to claim 2 wherein each token of the strip is decorated, before parting from the strip, by a process selected from a group consisting of surface relief formed during moulding, or embossing after moulding, or hot die stamping.

4. A method according to claim 1 wherein the strip of material including token portions is in a form selected from a group consisting of an extrusion of a single thermoplastic polymer, a co-extruded tow-layer strip of said thermoplastics polymer and a second polymer, an extrusion coated metal strip, and a laminate of a polymer and a metal strip.

5. A method according to claim 4 wherein indicia are marked on the strip before each token is parted from the strip.

6. A method according to claim 4 wherein the strip is formed to comprise a central web and an offset flange margin extending laterally from each side of the central web.

7. A method according to claim 4, wherein the strip to a first cut to part said to taken and then said token is applied to said lever or ring pull which is part-formed.

8. A method according to claim 7 when dependent on claim 6 which the punch and die cooperate to cut out a token having a body cut from the central web and at least one lug extending laterally from the token body in a plane offset from the plane of the body.

9. A method according to claim 1, wherein a peripheral portion of the lever or ring pull is curled to clinch against a peripheral portion or lug of the token.

10. A method according to claim 1, wherein said lever or ring pull with said token attached, is passed to a rivetting station at which the lever or pull ring is retained on the can end by staking of a rivet.

11. A method of retaining a token in a ring pull or lever, said method being characterised by the steps of providing a strip of material including a token portion, applying pressure to the strip to part a token from the strip and apply the parted token to the lever or ring pull, and clenching a peripheral portion of the material or ring pull into engagement with the token.