US3623653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food package construction
Assignee: Primerica Inc
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Filing: 1970-09-04
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Granted: 1971-11-30
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Expires: 1990-09-04
Abstract
Abstract A construction for a food package consisting of two laminate members. Each laminate member consists of an inner layer, disposed adjacent to the food product, and an outer layer bonded to the inner layer. The inner layers are heat sealed together to enclose the food product in the laminate members. The bonds and tensile strengths of the layers are such that pulling the laminate members apart to open the package results in a delamination of one of the laminate members and the tearing of its inner layer to provide access to the food product.
Inventors
- 👤 William Anthony Work
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:42
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/26; B65D75/52; B65D75/58; B65D75/5855; B65D85/00; B65D85/70; B65D85/72; B65D85/76; B65D75/04; B65D75/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
243 words
In a package, for a product comprising a first laminate member having a first outer layer, intimately bonded to a first inner layer; a second laminate member having a second outer layer, intimately bonded to a second inner layer; said first and second inner layers being heat sealed together along the confronting peripheral margin portions of said laminate members to enclose said product within said laminate members; and means for pulling said laminate members apart to open said package by delamination of said first laminate member, the improvement comprising: the bond between said inner layers being stronger than the bond between said first outer layer and said first inner layer; the bond between said first, outer layer and Said first inner layer being stronger than the tensile strength of said first inner layer; and the tensile strength of said first outer layer being stronger than the bond between said first outer layer and said first inner layer so that as said laminate members are pulled apart, said first outer and said first inner layers will initially unbond in the confronting peripheral margin portions of said first outer layer with said second outer layer where said inner layers are bonded and so that said first inner layer will tear to open the package as the pulling apart of said laminate members continues beyond the unbonding of said first outer and said first inner layers in said confronting peripheral margin portions of said outer layers.
Claim 2
Dependent Claim
243 words
In a package, for a product comprising a first laminate member having a first outer layer, intimately bonded to a first inner layer; a second laminate member having a second outer layer, intimately bonded to a second inner layer; said first and second inner layers being heat sealed together along the confronting peripheral margin portions of said laminate members to enclose said product within said laminate members; and means for pulling said laminate members apart to open said package by delamination of said first laminate member, the improvement comprising: the bond between said inner layers being stronger than the bond between said first outer layer and said first inner layer; the bond between said first, outer layer and Said first inner layer being stronger than the tensile strength of said first inner layer; and the tensile strength of said first outer layer being stronger than the bond between said first outer layer and said first inner layer so that as said laminate members are pulled apart, said first outer and said first inner layers will initially unbond in the confronting peripheral margin portions of said first outer layer with said second outer layer where said inner layers are bonded and so that said first inner layer will tear to open the package as the pulling apart of said laminate members continues beyond the unbonding of said first outer and said first inner layers in said confronting peripheral margin portions of said outer layers.
Claim 3
Dependent Claim
21 words
The package of claim A wherein said first outer layer and said first inner layer are coextruded as a laminate web.
Claim 4
Dependent Claim
36 words
The package of claim A wherein said first outer layer is polypropylene; said first inner layer is polyethylene; and said first outer layer is from one to six times as thick as said first inner layer.
References Cited (Backward Citations)
US2954116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |