US3910453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy opening can end with push-in tabs
Assignee: Crown Cork and Seal Co Inc
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Filing: 1974-10-10
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Granted: 1975-10-07
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Expires: 1994-10-10
Abstract
Abstract A can end of the easy opening type with a preformed dispensing opening and a preformed venting opening is double seamed to a can body. A unitary push-in tab member is affixed to the underside of the end panel between the dispensing opening and the venting opening along a support portion. Push-in plug portions are connected to the support portion by hinge portions.
Inventors
- 👤 Raymond H P Kneusel
- 👤 Vinson S Potts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:02
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/50; B65D17/506
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
144 words
A can end of the easy opening type comprising: an end panel having an opening therein including a downwardly extending curl having an edge substantially surrounding said opening; and a plastic push tab member comprising a support portion affixed to the underside of said end panel adjacent said opening, a hinge portion attached to said support portion and freely movable downwardly away from said underside of said end panel, a sealing portion attached to said hinge portion and spaced from said support portion, said sealing portion spaced radially outwardly from said curl and substantially surrounding said opening and in substantial sealing engagement on the underside of said end panel so as to substantially isolate said edge from the contents of a can closed by the can end and a plug portion extending upwardly into the opening centrally of said sealing portion and said curl.
Claim 2
Dependent Claim
144 words
A can end of the easy opening type comprising: an end panel having an opening therein including a downwardly extending curl having an edge substantially surrounding said opening; and a plastic push tab member comprising a support portion affixed to the underside of said end panel adjacent said opening, a hinge portion attached to said support portion and freely movable downwardly away from said underside of said end panel, a sealing portion attached to said hinge portion and spaced from said support portion, said sealing portion spaced radially outwardly from said curl and substantially surrounding said opening and in substantial sealing engagement on the underside of said end panel so as to substantially isolate said edge from the contents of a can closed by the can end and a plug portion extending upwardly into the opening centrally of said sealing portion and said curl.
Claim 3
Dependent Claim
19 words
The can of claim 1 wherein said sealing portion is also affixed to the underside of said end panel.
Claim 4
Dependent Claim
24 words
The can end of claim 2 wherein said sealing portion and said support portion are ultrasonically welded to the underside of said end panel.
Claim 5
Dependent Claim
19 words
The can end of claim 3 wherein said hinge portion is spaced from the underside of said end panel.
Claim 6
Dependent Claim
34 words
The can end of claim 4 wherein said hinge portion is thinner than said support portion so as to provide a hinge memory to maintain said plug portion in a pushed-in position after opening.
Claim 7
Dependent Claim
15 words
The can end of claim 5 wherein said hinge portion extends downwardly and radially inwardly.
Claim 8
Dependent Claim
50 words
The can end of claim 1 wherein said end panel includes a dispensing opening and a venting opening and a single said plastic push tab member closes each said opening, the support portion being affixed to said underside of said end panel between said dispensing opening and said venting opening.
Claim 9
Dependent Claim
95 words
A can end of the easy opening type comprising: an end panel having a dispensing opening and a venting opening, each said opening having a downwardly extending curl with an edge substantially surrounding said opening; and a unitary plastic push tab member comprising a support portion affixed to the underside of said end panel between said dispensing opening and said venting opening, said push tab member comprising a dispensing opening plug portion and a venting opening plug portion connected to said support portion by hinge portions freely movable away from the underside of end panel.
Claim 10
Dependent Claim
95 words
A can end of the easy opening type comprising: an end panel having a dispensing opening and a venting opening, each said opening having a downwardly extending curl with an edge substantially surrounding said opening; and a unitary plastic push tab member comprising a support portion affixed to the underside of said end panel between said dispensing opening and said venting opening, said push tab member comprising a dispensing opening plug portion and a venting opening plug portion connected to said support portion by hinge portions freely movable away from the underside of end panel.
Claim 11
Dependent Claim
70 words
The can end of claim 8 including a first sealing portion substantially surrounding said dispensing opening plug portion and connected to one of said hinge portions and a second sealing portion substantially surrounding said venting opening plug portion and connected to the other of said hinge portions, each said sealing portion being in substantial sealing engagement with said end panel so as to isolate said edge surrounding each said opening.
Claim 12
Dependent Claim
20 words
The can end of claim 9 wherein each said sealing portion is affixed to the underside of said end panel.
Claim 13
Dependent Claim
25 words
The can end of claim 10 wherein each said sealing portion and said support portion are ultrasonically welded to the underside of said end panel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |