US4488924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sealing laminar thermoplastic films and bags
Assignee: Mobil Oil AS
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Filing: 1983-03-24
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Granted: 1984-12-18
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Expires: 2003-03-24
Abstract
Abstract A heat sealable film laminate having a first layer of a major amount of a high density polyolefin, a minor proportion of an adhesion promoting ionomer and a heat seal promoting proportion of a metal salt of a fatty acid; and a second layer adhering to the first layer, said layer comprising a polyamide. A food storage and heating bag formed from said laminate and a method of heat sealing said laminate.
Inventors
- 👤 Donald J. Krieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:33
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B65; B65D; B65D31/00; B65D31/02; B65D81/00; B65D81/34; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31942; Y10T428/31946
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
90 words
A method of sealing a film laminate comprising: (a) forming a laminate comprising a first layer comprising a major amount of a high density polyolefin, a minor amount of an adhesion promoting ionomer and a heat seal promoting proportion of a metal salt of a fatty acid; and a second layer adhering to said first layer, said second layer comprising a polyamide; (b) placing one or more regions of said first layer in face to face contact; and (c) applying sufficient temperature to said regions to fuse said regions together.
Claim 2
Independent Claim
90 words
A method of sealing a film laminate comprising: (a) forming a laminate comprising a first layer comprising a major amount of a high density polyolefin, a minor amount of an adhesion promoting ionomer and a heat seal promoting proportion of a metal salt of a fatty acid; and a second layer adhering to said first layer, said second layer comprising a polyamide; (b) placing one or more regions of said first layer in face to face contact; and (c) applying sufficient temperature to said regions to fuse said regions together.
Claim 3
Dependent Claim
18 words
The method of claim 1 including heat-severing through said layers to simultaneously seal and cut through said layers.
Claim 4
Dependent Claim
30 words
The method of claim 1 wherein said laminate is in the form of a partially constructed bag and said heat-severing constitutes the severing and simultaneous side sealing of the bag.
References Cited (Backward Citations)
US3819792A
Cited
US3836620A
Cited
US3791915A
Cited
US4340558A
Cited
US4169910A
Cited
US4220684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |