US4848931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging sheet and containers and pouches using the sheet
Assignee: Toyo Aluminum KK
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Filing: 1988-03-09
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Granted: 1989-07-18
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Expires: 2008-03-09
Abstract
Abstract A packaging sheet for containing foodstuff is proposed which comprises a substrate of synthetic resin and a metallic film layer laminated to the substrate through an adhesive layer and a resin layer having a lower bond strength than the adhesive layer. Food packaging containers using the packaging sheet as a lid and self-standing pouches using the packaging sheet as their side sheets are also proposed. Before such a container or pouch containing food is put into a microwave oven for cooking, the metallic film layer or layers can be removed easily from the substrate.
Inventors
- 👤 Mamoru Kamada
- 👤 Fumiaki Nagase
- 👤 Eiichi Takeuchi
- 👤 Toshihiko Nakano
- 👤 Shoichi Makimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:08
CPC Classifications
B; B65; B65D; B65D77/00; B65D77/10; B65D77/20; B65D77/2024; B65D77/2028; B65D77/2032; B65D77/2044; B65D77/2048; B65D77/2056; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B65D75/00; B65D75/28; B65D81/00; B65D81/34; B65D81/3446; B65D81/3453; B65D81/3461; B65D2207/00; B65D2577/00; B65D2577/10; B65D2577/20; B65D2577/2041; B65D2577/205; B65D2577/2066; B65D2577/2075; B65D2577/2091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A self-standing packaging pouch comprising (A) a pair of side sheets, and (B) a bottom sheet being folded and having its outer surface heat-fused to the inner surfaces of said side sheets, said side sheets comprising the following elements: (1) a substrate of a synthetic resin, (2) a metallic film layer laminated to one side of the substrate, (3) an adhesive layer disposed between the substrate and the metallic film layer, and (4) a plurality of resin segments each intermittently interposed between the synthetic substrate resin and the adhesive layer, wherein the plurality of resin segments has a lower bond strength with respect to the synthetic substrate resin than does the adhesive layer with respect to the synthetic substrate resin.
Claim 2
Dependent Claim
120 words
A self-standing packaging pouch comprising (A) a pair of side sheets, and (B) a bottom sheet being folded and having its outer surface heat-fused to the inner surfaces of said side sheets, said side sheets comprising the following elements: (1) a substrate of a synthetic resin, (2) a metallic film layer laminated to one side of the substrate, (3) an adhesive layer disposed between the substrate and the metallic film layer, and (4) a plurality of resin segments each intermittently interposed between the synthetic substrate resin and the adhesive layer, wherein the plurality of resin segments has a lower bond strength with respect to the synthetic substrate resin than does the adhesive layer with respect to the synthetic substrate resin.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |