Patent US4357740A successfully refreshed from Google Patents.
US4357740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag closure device
Assignee: Individual
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Filing: 1981-05-18
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Granted: 1982-11-09
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Expires: 2001-05-18
Abstract
Abstract A device of integral construction having resilient prongs in a symmetrically concave shell is capable of gripping thin film material of which plastic bags are fabricated. The device can thereby effect closure of such bags. The gripping characteristics of the device can be transiently modified to cause release of a gripped film, thereby permitting re-opening of such bags. The transient modification of the gripping characteristics is achieved by manually applying compressional force to levers associated with the prongs adjacent the base of the shell.
Inventors
- 👤 Theodore G. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:20
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/1616; B65D33/1625; Y; Y10; Y10T; Y10T24/00; Y10T24/15; Y10T24/155; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44872; Y10T24/44906; Y10T24/44915
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
A closure device of integral construction fabricated of resilient material comprising a concave shell symmetrically shaped about a center line axis and having a circular base, a plurality of elongated slots in said shell equiangularly spaced about said axis and oriented within planes containing said axis, said slots cooperatively defining closely spaced prongs of substantially triangular configuration capable of gripping a plastic film positioned therebetween, and levers emanating outwardly from said base, said levers being positioned adjacent the perpendicular bisectors of said triangular prongs, whereby when said levers are grasped by hand and squeezed inwardly toward the interior of said circular base, said prongs are caused to move apart and thereby release a gripped plastic film.
Claim 2
Dependent Claim
116 words
A closure device of integral construction fabricated of resilient material comprising a concave shell symmetrically shaped about a center line axis and having a circular base, a plurality of elongated slots in said shell equiangularly spaced about said axis and oriented within planes containing said axis, said slots cooperatively defining closely spaced prongs of substantially triangular configuration capable of gripping a plastic film positioned therebetween, and levers emanating outwardly from said base, said levers being positioned adjacent the perpendicular bisectors of said triangular prongs, whereby when said levers are grasped by hand and squeezed inwardly toward the interior of said circular base, said prongs are caused to move apart and thereby release a gripped plastic film.
Claim 3
Dependent Claim
32 words
The device of claim 1 wherein said concave shell has the configuration of a surface of revolution about a straight line axis and includes a cone shape, parabolical shape and hemispherical shape.
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) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |