Patent US3923237A successfully refreshed from Google Patents.
US3923237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package and method of forming same
Assignee: Ekco Products Inc
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Filing: 1974-08-06
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Granted: 1975-12-02
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Expires: 1994-08-06
Abstract
Abstract A package wherein a plastic dome cover is releasably secured to a container by distorting a depending skirt of the cover so that it curls around and interlocks with a flange on the container. The cover being a material with known shrink characteristics, distortion of the skirt is achieved by the application of heat thereto, and the skirt is segmented to provide selective distortion. The amount of distortion as well as the location of the distortion are factors which cooperate to produce a predetermined interlock between the cover skirt and the container flange.
Inventors
- 👤 Donald J Bostrom
- 👤 Stanley Moorad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:21
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/66; B29C65/02; B29C65/10; B29C65/56; B29C65/567; B29C65/568; B29C65/64; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/131; B29C66/1312; B29C66/50; B29C66/51; B29C66/54; B29C66/542; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B65; B65D; B65D43/00; B65D43/02; B65D43/0202; B65D43/0233; B29K; B29K2101/00; B29K2101/12; B29K2305/00; B29K2305/02; B29K2995/00; B29K2995/0037; B29K2995/0049; B29K2995/005; B29K2995/0053; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00259; B65D2543/00296; B65D2543/00342; B65D2543/00351; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/00527; B65D2543/00537; B65D2543/00574
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
171 words
A reclosable package comprising a circular pan having a bottom wall, a side wall extending upwardly and outwardly from said bottom wall, and a peripheral flange extending outwardly from the upper end of said side wall; a product in said pan; and a preformed circular dome cover of biaxially oriented thermoplastic material, said cover comprising a top wall, a side wall depending downwardly from said top wall, a peripheral shoulder extending outwardly from said side wall and a peripheral skirt depending downwardly from said shoulder, said shoulder overlying said pan flange, said skirt extending below said pan flange and having the periphery thereof curled beneath said flange, said skirt comprising long portions and short portions whereby said long portions curl under said flange a substantial portion of the lateral dimension of the flange and said short portions curl just slightly under the flange, said short portions comprising less than one-half the total circumferential length of said skirt, and at least one long portion being liftable from securement with the pan flange.
Claim 2
Dependent Claim
171 words
A reclosable package comprising a circular pan having a bottom wall, a side wall extending upwardly and outwardly from said bottom wall, and a peripheral flange extending outwardly from the upper end of said side wall; a product in said pan; and a preformed circular dome cover of biaxially oriented thermoplastic material, said cover comprising a top wall, a side wall depending downwardly from said top wall, a peripheral shoulder extending outwardly from said side wall and a peripheral skirt depending downwardly from said shoulder, said shoulder overlying said pan flange, said skirt extending below said pan flange and having the periphery thereof curled beneath said flange, said skirt comprising long portions and short portions whereby said long portions curl under said flange a substantial portion of the lateral dimension of the flange and said short portions curl just slightly under the flange, said short portions comprising less than one-half the total circumferential length of said skirt, and at least one long portion being liftable from securement with the pan flange.
Claim 3
Dependent Claim
36 words
The reclosable package of claim 1 wherein the skirt comprises two short portions which are disposed on either side of the liftable one long portion, and an other long portion disposed opposite said one long portion.
Claim 4
Dependent Claim
25 words
The reclosable package of claim 2 wherein the other long portion of the skirt comprises less than one-half the total circumferential length of said skirt.
References Cited (Backward Citations)
US3402874A
Cited
US2975931A
Cited
US3344912A
Cited
US3298505A
Cited
US3615707A
Cited
US3799389A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |