US3578239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag structure
Assignee: Vac Pac Manufacturing Co Inc
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Filing: 1969-07-17
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Granted: 1971-05-11
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Expires: 1989-07-17
Abstract
Abstract An improved method of adhering the bottom of polyalkylene terephthalate film bags, such as those used to shrink package frozen turkeys, is disclosed. The bags are adhered on at least one side with two distinct adhesive bands. The inner band is a thermoplastic adhesive which allows a measure of ''''peelability and shock absorbability,'''' whereas the outer adhesive band is a high strength thermosetting adhesive. The contained product may even be cooked within the bag.
Inventors
- 👤 Sol J Perlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:05
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/34; B65D31/00; B65D33/00; B65D33/16; B65D33/18; B65D33/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A polyalkylene terephthalate film bag suitable for packaging, said bag comprising unoriented polyalkylene terephthalate film in the shape of an open-end bag, at least one edge of the bag being formed by adhering the polyalkylene terephthalate film to itself, the adhesive used to adhere said polyalkylene terephthalate film being the combination of (1) an inner band of thermoplastic polyalkylene terephthalate film adhesive and (2) an outer band of thermosetting polyalkylene terephthalate film adhesive.
Claim 2
Dependent Claim
73 words
A polyalkylene terephthalate film bag suitable for packaging, said bag comprising unoriented polyalkylene terephthalate film in the shape of an open-end bag, at least one edge of the bag being formed by adhering the polyalkylene terephthalate film to itself, the adhesive used to adhere said polyalkylene terephthalate film being the combination of (1) an inner band of thermoplastic polyalkylene terephthalate film adhesive and (2) an outer band of thermosetting polyalkylene terephthalate film adhesive.
Claim 3
Dependent Claim
27 words
The product claimed in claim 1, wherein said polyalkylene terephthalate film bag is polyethylene terephthalate film bag, and each adhesive band is at least one-eighth inch wide.
Claim 4
Dependent Claim
35 words
The product as claimed in claim 2, wherein said thermoplastic adhesive is a thermoplastic polyester or polyamide polyethylene terephthalate film adhesive, and said thermosetting adhesive is a thermosetting polyester or polyurethane polyethylene terephthalate film adhesive.
Claim 5
Dependent Claim
87 words
A polyalkylene terephthalate film bag suitable for shrink packaging, said bag comprising oriented heat shrinkable polyalkylene terephthalate film in the shape of an open-end bag, the bottom of said bag being formed by folding the polyalkylene terephthalate film, the sides of said bag being formed by adhering the polyalkylene terephthalate film to itself, the adhesive used to adhere said polyalkylene terephthalate film being the combination of (1) an inner band of thermoplastic polyalkylene terephthalate film adhesive and (2) an outer band of thermosetting polyalkylene terephthalate film adhesive.
Claim 6
Dependent Claim
87 words
A polyalkylene terephthalate film bag suitable for shrink packaging, said bag comprising oriented heat shrinkable polyalkylene terephthalate film in the shape of an open-end bag, the bottom of said bag being formed by folding the polyalkylene terephthalate film, the sides of said bag being formed by adhering the polyalkylene terephthalate film to itself, the adhesive used to adhere said polyalkylene terephthalate film being the combination of (1) an inner band of thermoplastic polyalkylene terephthalate film adhesive and (2) an outer band of thermosetting polyalkylene terephthalate film adhesive.
Claim 7
Dependent Claim
27 words
The product claimed in claim 4, wherein said polyalkylene terephthalate film bag is polyethylene terephthalate film bag, and each adhesive band is at least one-eighth inch wide.
Claim 8
Dependent Claim
35 words
The product as claimed in claim 5, wherein said thermoplastic adhesive is a thermoplastic polyester or polyamide polyethylene terephthalate film adhesive, and said thermosetting adhesive is a thermosetting polyester or polyurethane polyethylene terephthalate film adhesive.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |