US4347939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoformed closure of composite material
Assignee: KLM COMPANY A CORP OF CT
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Filing: 1976-09-24
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Granted: 1982-09-07
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Expires: 1996-09-24
Abstract
Abstract An improved container closure which is thermoformed from a sheet of two thermoplastic materials, where one of the materials, which constitutes the inner liner of the closure, is an expanded cellular plastic foam.
Inventors
- 👤 John D. Upton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:33
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0435; B65D41/045; B65D41/0457; B65D55/00; B65D55/02; B65D55/022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
A container closure comprising a thermoformed unitary composite material structure having an outer shell of thermoformed thermoplastic material of substantially uniform thickness throughout except in the areas where deformed during thermoforming and having a top wall and a skirt wall depending therefrom, and a liner of compressible cellular foam thermoplastic material located within and being coextensive with the entire inner surface of said outer shell, said liner being of substantially uniform thickness throughout except in the areas where deformed during thermoforming and bonded to the inner surface of said shell and formed to the desired shape during the thermoforming of the closure, and at least one tab cut through the shell and liner of said closure skirt wall and extending inwardly therefrom, said tab adapted for engaging a member on the container as the closure is unfastened therefrom.
Claim 2
Dependent Claim
138 words
A container closure comprising a thermoformed unitary composite material structure having an outer shell of thermoformed thermoplastic material of substantially uniform thickness throughout except in the areas where deformed during thermoforming and having a top wall and a skirt wall depending therefrom, and a liner of compressible cellular foam thermoplastic material located within and being coextensive with the entire inner surface of said outer shell, said liner being of substantially uniform thickness throughout except in the areas where deformed during thermoforming and bonded to the inner surface of said shell and formed to the desired shape during the thermoforming of the closure, and at least one tab cut through the shell and liner of said closure skirt wall and extending inwardly therefrom, said tab adapted for engaging a member on the container as the closure is unfastened therefrom.
Claim 3
Dependent Claim
138 words
A container closure comprising a thermoformed unitary composite material structure having an outer shell of thermoformed thermoplastic material of substantially uniform thickness throughout except in the areas where deformed during thermoforming and having a top wall and a skirt wall depending therefrom, and a liner of compressible cellular foam thermoplastic material located within said outer shell, said liner being of substantially uniform thickness throughout except in the areas where deformed during thermoforming and bonded to the inner surface of said shell and formed to the desired shape during the thermoforming of the closure over said top wall and at least a portion of the skirt wall, and an outwardly extending portion formed on the bottom of said skirt wall and at least one tab partially cut in said outwardly extending portion of the skirt wall and extending downwardly.
Claim 4
Dependent Claim
138 words
A container closure comprising a thermoformed unitary composite material structure having an outer shell of thermoformed thermoplastic material of substantially uniform thickness throughout except in the areas where deformed during thermoforming and having a top wall and a skirt wall depending therefrom, and a liner of compressible cellular foam thermoplastic material located within said outer shell, said liner being of substantially uniform thickness throughout except in the areas where deformed during thermoforming and bonded to the inner surface of said shell and formed to the desired shape during the thermoforming of the closure over said top wall and at least a portion of the skirt wall, and an outwardly extending portion formed on the bottom of said skirt wall and at least one tab partially cut in said outwardly extending portion of the skirt wall and extending downwardly.
Claim 5
Dependent Claim
157 words
A container closure comprising a thermoformed unitary composite material structure having an outer shell of thermoformed thermoplastic material of substantially uniform thickness throughout except in the areas where deformed during thermoforming and having a top wall and a skirt wall depending therefrom, and a liner of compressible cellular foam thermoplastic material located within said outer shell, said liner being of substantially uniform thickness throughout except in the areas where deformed during thermoforming and bonded to the inner surface of said shell and formed to the desired shape during the thermoforming of the closure over said top wall and a portion of the skirt wall, said liner material as formed only partly covering the interior of the skirt wall of the shell, and at least one tab cut through the skirt wall in the area without the liner and extending inwardly therefrom, said tab adapted for engaging a member on the container as the closure is unfastened therefrom.
Claim 6
Dependent Claim
157 words
A container closure comprising a thermoformed unitary composite material structure having an outer shell of thermoformed thermoplastic material of substantially uniform thickness throughout except in the areas where deformed during thermoforming and having a top wall and a skirt wall depending therefrom, and a liner of compressible cellular foam thermoplastic material located within said outer shell, said liner being of substantially uniform thickness throughout except in the areas where deformed during thermoforming and bonded to the inner surface of said shell and formed to the desired shape during the thermoforming of the closure over said top wall and a portion of the skirt wall, said liner material as formed only partly covering the interior of the skirt wall of the shell, and at least one tab cut through the skirt wall in the area without the liner and extending inwardly therefrom, said tab adapted for engaging a member on the container as the closure is unfastened therefrom.
References Cited (Backward Citations)
US2423582A
Cited
US2990078A
Cited
US3262625A
Cited
US3270904A
Cited
US3310191A
Cited
US3866845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |