US5287961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-compartment package having improved partition strip
Assignee: Cryovac LLC
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Filing: 1992-10-23
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Granted: 1994-02-22
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Expires: 2012-10-23
Abstract
Abstract A multi-compartment flexible package is provided for filling with products which are to be stored separately from each other. A multi-compartment package made from flexible thermoplastic material heat sealed at the peripheral edges is provided. The compartments are formed by rupturable partition strips heat sealed in place between the sheets of thermoplastic material forming the package. The partition strips are comprised of at least one layer of heat sealable material which is different from the thermoplastic material and which can be ruptured under pressure allowing the products in the compartments to mix.
Inventors
- 👤 Vincent W. Herran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:58
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/32; B65D81/3261; B65D81/3266
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
A multi-compartment package formed of flexible thermoplastic material, suitable for filling with materials which are to be stored in isolation from each other, comprising: a pouch formed of thermoplastic film material positioned in overlying relationship and permanently heat sealed on all but one edge thereof, at least one partition strip positioned between the sheets of thermoplastic film in such manner as to form at least two separate compartments, the open side being sealed after filling said compartments, whereby a rupturable seal between the resulting compartments is formed, said partition strip comprising at least one layer of heat sealable material being rupturable under nominal pressure allowing the products in each compartment to mix, said heat sealable layer of said partition strip comprising a blend of polypropylene, polybutylene and linear low density polyethylene.
Claim 2
Dependent Claim
131 words
A multi-compartment package formed of flexible thermoplastic material, suitable for filling with materials which are to be stored in isolation from each other, comprising: a pouch formed of thermoplastic film material positioned in overlying relationship and permanently heat sealed on all but one edge thereof, at least one partition strip positioned between the sheets of thermoplastic film in such manner as to form at least two separate compartments, the open side being sealed after filling said compartments, whereby a rupturable seal between the resulting compartments is formed, said partition strip comprising at least one layer of heat sealable material being rupturable under nominal pressure allowing the products in each compartment to mix, said heat sealable layer of said partition strip comprising a blend of polypropylene, polybutylene and linear low density polyethylene.
Claim 3
Dependent Claim
43 words
The multi-compartment package according to claim 1 wherein said partition strip comprises from about 2% to about 10% by weight polypropylene, from about 5% to about 30% polybutylene by weight, and from about 60% to about 93% by weight linear low density polyethylene.
Claim 4
Dependent Claim
23 words
The multi-compartment package according to claim 2 wherein said partition strip has a thickness of from about 1.0 mils. to about 2.0 mils.
Claim 5
Dependent Claim
22 words
The multi-compartmented package according to claim 3 wherein said flexible thermoplastic film is from about 0.75 mils to about 5.0 mils thick.
Claim 6
Dependent Claim
22 words
The multi-compartmented package according to claim 4 wherein said flexible thermoplastic film is from about 1.25 mils to about 4.0 mils thick.
Claim 7
Dependent Claim
21 words
The multi-compartmented package according to claim 1 wherein said partition strip further comprises a second layer of linear low density polyethylene.
Claim 8
Dependent Claim
39 words
The multi-compartment package according to claim 6 wherein said partition strip first layer has a thickness of from about 0.75 mils to about 4.0 mils, and said second layer has a thickness of from 0.2 mils to 0.6 mils.
Claim 9
Dependent Claim
30 words
The multi-compartment package according to claim 1 wherein said flexible thermoplastic material is a multi-layered structure having layers selected from the group comprising polyolefin, EVOH, PVDC, ionomer, and polyamide polymers.
References Cited (Backward Citations)
US2932385A
Cited
US2885104A
Cited
US2971850A
Cited
US3074544A
Cited
US3294227A
Cited
US3608709A
Cited
US3809224A
Cited
CH581058A5
Cited
US4145449A
Cited
US4402402A
Cited
US4458811A
Cited
US4462224A
Cited
US4496046A
Cited
US4519499A
Cited
US4806371A
Cited
US4851246A
Cited
US4961495A
Cited
US5069773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |