US4057667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oriented saran coextrudate
Assignee: Primerica Inc
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Filing: 1975-08-06
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Granted: 1977-11-08
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Expires: 1995-08-06
Abstract
Abstract An oriented two-layered laminate of vinylidene chloride-vinyl chloride copolymer as one layer and an ethylene-unsaturated ester type copolymer as the other layer. To this laminate may be adhered another polymer, also capable of being oriented, plastic sheet, paper sheet or board, metal or metal foil. Products such as pouches, chubs, formed troughs and the like can be made therefrom because the vinylidene chloride-vinyl chloride copolymer retains its orientation.
Inventors
- 👤 Glenn C. Wiggins
- 👤 Marvin J. Kreh
- 👤 Robert S. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:27
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/14; B29C48/147; B29C48/1472; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/336; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B65; B65D; B65D75/00; B65D75/52; B65D75/54; B29C2791/00; B29C2791/004; B29C2791/007; B29C2793/00; B29C2793/0063; B29C48/001; B29C48/0017; B29C48/0018; B29C48/0019; B29C48/0022; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2435/00; B32B2435/02; B32B2439/00; B32B2519/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1303; Y10T428/1307; Y10T428/1334; Y10T428/1338; Y10T428/1341; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
196 words
A pouch comprising two sheets of a bilaterally oriented plastic laminate comprised of a first layer of a vinylidene chloride-vinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethylene-unsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being non-separable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube, said layer of vinylidene chloride-vinyl chloride of one laminate being joined to said layer of vinylidene chloride-vinyl chloride of the other laminate to form said pouch.
Claim 2
Dependent Claim
196 words
A pouch comprising two sheets of a bilaterally oriented plastic laminate comprised of a first layer of a vinylidene chloride-vinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethylene-unsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being non-separable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube, said layer of vinylidene chloride-vinyl chloride of one laminate being joined to said layer of vinylidene chloride-vinyl chloride of the other laminate to form said pouch.
Claim 3
Dependent Claim
183 words
A plastic trough having wall and base portions formed of a bilaterally oriented plastic laminate comprised of a first layer of a vinylidene chloridevinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethylene-unsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being non-separable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube, said second layer forming the lining of said trough.
Claim 4
Dependent Claim
183 words
A plastic trough having wall and base portions formed of a bilaterally oriented plastic laminate comprised of a first layer of a vinylidene chloridevinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethylene-unsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being non-separable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube, said second layer forming the lining of said trough.
Claim 5
Dependent Claim
176 words
A wrapped cheese curing block comprising a block of cheese wrapped in a bilaterally oriented plastic laminate comprised of a first layer of a vinylidene chloridevinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethylene-unsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being nonseparable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube.
Claim 6
Dependent Claim
176 words
A wrapped cheese curing block comprising a block of cheese wrapped in a bilaterally oriented plastic laminate comprised of a first layer of a vinylidene chloridevinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethylene-unsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being nonseparable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube.
Claim 7
Dependent Claim
190 words
In a laminated structure: a bilaterally oriented plastic laminate comprised of a first layer of a vinylidene chloride-vinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethyleneunsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being non-separable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube; and a layer of material selected from the group consisting of paper, paperboard, metal and metal foil adherent to said plastic laminate.
Claim 8
Dependent Claim
190 words
In a laminated structure: a bilaterally oriented plastic laminate comprised of a first layer of a vinylidene chloride-vinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethyleneunsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being non-separable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube; and a layer of material selected from the group consisting of paper, paperboard, metal and metal foil adherent to said plastic laminate.
Claim 9
Dependent Claim
50 words
Bottle cap liners comprising appropriately shaped portions of the laminate of claim 4, wherein said layer is paper and said layer of ethylene-unsaturated ester type copolymers is between the paper and the layer of vinylidene chloride-vinyl chloride copolymers, and the latter faces the interior of the bottle when in use.
Claim 10
Dependent Claim
27 words
A wrapped cheese curing block comprising a block of cheese wrapped in the laminate of claim 4 wherein said layer is paper and is on the outside.
Claim 11
Dependent Claim
30 words
A protected ornamental flat surface comprising the surface of an object having adhered thereto the laminate of claim 4 wherein said layer is metal foil and is on the outside.
Claim 12
Dependent Claim
196 words
A trapped label laminate comprising two sheets of a bilaterally oriented plastic laminate and a printed label therebetween, each of said sheets being comprised of a first layer of a vinylidene chloride-vinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethyleneunsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being non-separable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube, said first layers of said sheets being on the outside of said label laminate.
Claim 13
Dependent Claim
196 words
A trapped label laminate comprising two sheets of a bilaterally oriented plastic laminate and a printed label therebetween, each of said sheets being comprised of a first layer of a vinylidene chloride-vinyl chloride copolymer containing a predominant amount of vinylidene chloride in the copolymer molecule, and a second layer of an ethyleneunsaturated ester type copolymer containing a predominant amount of ethylene in the copolymer molecule and wherein said unsaturated ester is selected from the group consisting of vinyl acetate and isobutyl acrylate, said first layer and said second layer being non-separable with tape and said laminate being prepared by coextruding said first layer and said second layer as a plural layered tube, chilling said tube at a temperature of about 5° C to about 25° C and then tempering said tube at a temperature of about 20° C to about 50° C immediately prior to blowing said tube into a bubble with a fluid whereby the molecules of said copolymer are bilaterally oriented and wherein the total area of said bubble is at least about 16 times the area of said tube, said first layers of said sheets being on the outside of said label laminate.
Claim 14
Dependent Claim
16 words
A package comprising the label laminate of claim 8 sealed longitudinally and clipped at both ends.
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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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |