US4257536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminate structure for collapsible dispensing container
Assignee: Rexam Beverage Can Co
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Filing: 1979-10-15
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Granted: 1981-03-24
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Expires: 1999-10-15
Abstract
Abstract A collapsible dispensing container for packaging preparations containing hard-to-hold ingredients such as acetic acid. The container comprises a deformable tubular body and a thermoplastic head fused thereto. The wall of the tubular body is made of a plurality of laminations, including a sealant core film which prevents product migration and delamination. The wall of the tubular body comprises, from the inside of the tubular body toward the outside thereof, overlying layers of ethylene-acrylic acid copolymer, the sealant core film and an outer thermoplastic (e.g., polyethylene) layer bonded to the outer layer of the sealant core film by another layer of ethylene-acrylic acid copolymer. The sealant core film comprises a metallic foil (e.g., aluminum) layer bonded to said inner ethylene-acrylic acid layer, an intermediate biaxially oriented corona treated polyester barrier layer bonded to said metal foil layer by a polyester adhesive layer or other suitable adhesive and an outer layer of ethylene-vinyl acetate or narrow molecular weight distribution (MWD) polyethylene bonded to the outer surface of said barrier layer by another polyester adhesive layer or other suitable adhesive. All layers are coextensively bonded to each other along their entire respective surfaces to insure against product migration and delamination at the metal foil interface.
Inventors
- 👤 Shaun K. Hilmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:04
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B1/00; B32B1/08; B32B15/20; B32B27/00; B32B27/30; B32B27/306; B32B27/32; B32B7/00; B32B7/04; B32B7/12; B65; B65D; B65D35/00; B65D35/02; B32B2307/00; B32B2307/30; B32B2307/31; B32B2310/00; B32B2310/14; B32B2439/00; B32B2439/40; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
128 words
A collapsible dispensing container having a tubular body and a thermoplastic head fused thereto, said tubular body having a plurality of laminations, including a sealant core film, a first overlying layer of ethylene-acrylic acid copolymer on the product side of said sealant core film, an outer overlying thermoplastic polymer layer and a second layer of ethylene-acrylic acid copolymer for adhesively bonding the outer side of said sealant core film to said outer thermoplastic polymer layer; said sealant core film comprising a metallic foil layer secured to said second ethylene-acrylic acid copolymer layer, an intermediate polyester barrier layer bonded to said metal foil layer by a first adhesive layer and a heat sealable polymer layer bonded to the other surface of said barrier layer by a second adhesive layer.
Claim 2
Dependent Claim
128 words
A collapsible dispensing container having a tubular body and a thermoplastic head fused thereto, said tubular body having a plurality of laminations, including a sealant core film, a first overlying layer of ethylene-acrylic acid copolymer on the product side of said sealant core film, an outer overlying thermoplastic polymer layer and a second layer of ethylene-acrylic acid copolymer for adhesively bonding the outer side of said sealant core film to said outer thermoplastic polymer layer; said sealant core film comprising a metallic foil layer secured to said second ethylene-acrylic acid copolymer layer, an intermediate polyester barrier layer bonded to said metal foil layer by a first adhesive layer and a heat sealable polymer layer bonded to the other surface of said barrier layer by a second adhesive layer.
Claim 3
Dependent Claim
18 words
A dispensing container as in claim 1 wherein said outer thermoplastic layer of the tubular body is polyethylene.
Claim 4
Dependent Claim
13 words
A dispensing container as in claim 1 wherein said metal foil is aluminum.
Claim 5
Dependent Claim
16 words
A dispensing container as in claim 3 wherein said heat sealable layer is ethylene-vinyl acetate copolymer.
Claim 6
Dependent Claim
15 words
A collapsible container as in claim 3 wherein said polyester barrier layer is biaxially oriented.
Claim 7
Dependent Claim
13 words
A dispensing container as in claim 2 wherein said metal foil is aluminum.
Claim 8
Dependent Claim
16 words
A dispensing container as in claim 6 wherein said heat sealable layer is ethylene-vinyl acetate copolymer.
Claim 9
Dependent Claim
15 words
A collapsible container as in claim 6 wherein said polyester barrier layer is biaxially oriented.
Claim 10
Dependent Claim
16 words
A dispensing container as in claim 2 wherein said heat sealable layer is ethylene-vinyl acetate copolymer.
Claim 11
Dependent Claim
15 words
A collapsible container as in claim 2 wherein said polyester barrier layer is biaxially oriented.
Claim 12
Dependent Claim
16 words
A dispensing container as in claim 1 wherein said heat sealable layer is ethylene-vinyl acetate copolymer.
Claim 13
Dependent Claim
15 words
A collapsible container as in claim 1 wherein said polyester barrier layer is biaxially oriented.
Claim 14
Dependent Claim
116 words
A multiply laminate for making tubular walls for collapsible dispensing containers, said laminate comprising a sealant core film, a first layer of ethylene-acrylic acid copolymer overlying the product side of said sealant core film, a second layer of ethylene-acrylic acid overlying the other side of said sealant core film and an outer layer of a thermoplastic polymer layer overlying said second ethylene-acrylic acid copolymer layer; said sealant core film comprising a metallic foil layer bonded to said second ethylene-acrylic acid layer, an intermediate polyester barrier layer bonded to said metal foil layer by a first adhesive layer, a heat sealable layer bonded by a second adhesive layer to the other side of said polyester barrier layer.
Claim 15
Dependent Claim
116 words
A multiply laminate for making tubular walls for collapsible dispensing containers, said laminate comprising a sealant core film, a first layer of ethylene-acrylic acid copolymer overlying the product side of said sealant core film, a second layer of ethylene-acrylic acid overlying the other side of said sealant core film and an outer layer of a thermoplastic polymer layer overlying said second ethylene-acrylic acid copolymer layer; said sealant core film comprising a metallic foil layer bonded to said second ethylene-acrylic acid layer, an intermediate polyester barrier layer bonded to said metal foil layer by a first adhesive layer, a heat sealable layer bonded by a second adhesive layer to the other side of said polyester barrier layer.
Claim 16
Dependent Claim
17 words
A multiply laminate as in claim 12 wherein said outer thermoplastic layer of the laminate is polyethylene.
Claim 17
Dependent Claim
13 words
A multiply laminate as in claim 14 wherein said metal foil is aluminum.
Claim 18
Dependent Claim
16 words
A multiply laminate as in claim 15 wherein said heat sealable layer is ethylene-vinyl acetate copolymer.
Claim 19
Dependent Claim
15 words
A multiply laminate as in claim 15 wherein said polyester barrier layer is biaxially oriented.
Claim 20
Dependent Claim
16 words
A multiply laminate as in claim 14 wherein said heat sealable layer is ethylene-vinyl acetate copolymer.
Claim 21
Dependent Claim
15 words
A multiply laminate as in claim 14 wherein said polyester barrier layer is biaxially oriented.
Claim 22
Dependent Claim
13 words
A multiply laminate as in claim 13 wherein said metal foil is aluminum.
Claim 23
Dependent Claim
16 words
A multiply laminate as in claim 20 wherein said heat sealable layer is ethylene-vinyl acetate copolymer.
Claim 24
Dependent Claim
15 words
A multiply laminate as in claim 20 wherein said polyester barrier layer is biaxially oriented.
Claim 25
Dependent Claim
16 words
A multiply laminate as in claim 13 wherein said heat sealable layer is ethylene-vinyl acetate copolymer.
Claim 26
Dependent Claim
15 words
A multiply laminate as in claim 13 wherein said polyester barrier layer is biaxially oriented.
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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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |