US3963141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure cap with self-opening means
Assignee: Individual
•
Filing: 1975-05-21
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Granted: 1976-06-15
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Expires: 1995-05-21
Abstract
Abstract A self-opening closure cap for containers. The cap has a hole at its central portion and a self-opening means integrally formed with a seal placed under the cap and protruding therefrom through the hole. In one embodiment the self-opening means and seal are injection molded of polyethylene or polypropylene. When a pulling force is exerted on the self-opening means by a finger, the core of the seal will be punctured so that the contents are removable through the hole without using any mechanical opener and without removing the whole cap.
Inventors
- 👤 Ming-Jen Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:20
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/40; B65D41/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A self-opening closure cap for a container comprising: a metal crown cap body having a hole at the central portion thereof; a seal placed under said cap body for creating a fluid-tight seal between said cap body and said container, and having a core portion in coincidence with said hole of said cap body; and a ring shaped portion integral with said seal placed above said cap body and connected to said core portion of said seal through said hole of said cap body, said core portion being severable from said seal upon the application of a pulling force on said ring-shaped portion to thereby expose the contents of said container through said hole.
Claim 2
Dependent Claim
114 words
A self-opening closure cap for a container comprising: a metal crown cap body having a hole at the central portion thereof; a seal placed under said cap body for creating a fluid-tight seal between said cap body and said container, and having a core portion in coincidence with said hole of said cap body; and a ring shaped portion integral with said seal placed above said cap body and connected to said core portion of said seal through said hole of said cap body, said core portion being severable from said seal upon the application of a pulling force on said ring-shaped portion to thereby expose the contents of said container through said hole.
Claim 3
Dependent Claim
26 words
The closure cap as defined in claim 1, including a groove at the boundary between said core portion and the outer annular portion of said seal.
Claim 4
Dependent Claim
18 words
The closure cap as defined in claim 2, wherein said groove is intermittent at least at one location.
References Cited (Backward Citations)
US1612927A
Cited
US2135386A
Cited
US2974815A
Cited
US3278063A
Cited
US3379326A
Cited
US3587897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |