Patent US3940525A successfully refreshed from Google Patents.
US3940525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tufted carpet having a polyolefin film as the secondary backing
Assignee: EIDP Inc
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Filing: 1974-12-30
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Granted: 1976-02-24
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Expires: 1994-12-30
Abstract
Abstract Improved process for preparing ethylene/vinyl acetate copolymer based hot-melt adhesive backsized tufted carpet wherein polyethylene, polypropylene or ethylene/vinyl acetate copolymer film is used as the secondary backing. Such carpets have unexpectedly and significantly improved tuft pull strength.
Inventors
- 👤 Edward Cooper Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:21
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B27/30; B32B27/306; B32B27/32; B32B37/00; B32B37/12; B32B7/00; B32B7/04; B32B7/12; D; D06; D06N; D06N7/00; D06N7/0063; D06N7/0071; D06N7/0078; B32B2323/00; B32B2323/04; B32B2323/046; B32B2323/10; B32B2471/00; B32B2471/02; D06N2203/00; D06N2203/04; D06N2203/042; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986; Y10T428/23993
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
In a process for backsizing a tufted carpet having a primary textile backing and tufts of yarn protruding therefrom which comprises heating an ethylene/vinyl ester copolymer based hot melt adhesive backsizing composition to a temperature of about 160° F. to about 400° F., applying by a roll-coater a uniform coating of about 10-40 ounces per square yard of the composition in a molten state to the back side of the carpet while moving the carpet past the roll-coater, contacting the still molten adhesive coated back side of the carpet with a secondary backing, pressing the primary and secondary backings together and solidifying the adhesive, the improvement comprising the use of a polymer film, selected from the group consisting of polyethylene, polypropylene and ethylene/vinyl acetate copolymers having a vinyl acetate content of up to about 18% by weight as the secondary backing.
Claim 2
Dependent Claim
141 words
In a process for backsizing a tufted carpet having a primary textile backing and tufts of yarn protruding therefrom which comprises heating an ethylene/vinyl ester copolymer based hot melt adhesive backsizing composition to a temperature of about 160° F. to about 400° F., applying by a roll-coater a uniform coating of about 10-40 ounces per square yard of the composition in a molten state to the back side of the carpet while moving the carpet past the roll-coater, contacting the still molten adhesive coated back side of the carpet with a secondary backing, pressing the primary and secondary backings together and solidifying the adhesive, the improvement comprising the use of a polymer film, selected from the group consisting of polyethylene, polypropylene and ethylene/vinyl acetate copolymers having a vinyl acetate content of up to about 18% by weight as the secondary backing.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein the ethylene/vinyl ester copolymer of said adhesive composition is ethylene/vinyl acetate copolymer having a vinyl acetate content of from about 10 to 40% by weight.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein said secondary backing is a polyethylene film.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein said secondary backing is a low density polyethylene film.
Claim 6
Dependent Claim
13 words
The process of claim 2 wherein said secondary backing is a polypropylene film.
Claim 7
Dependent Claim
14 words
The process of claim 5 wherein said secondary backing is a tactic polypropylene film.
Claim 8
Dependent Claim
29 words
The process of claim 2 wherein said secondary backing is an ethylene/vinyl acetate copolymer film having a vinyl acetate content of from about 4 to about 12% by weight.
Claim 9
Dependent Claim
84 words
In a carpet comprising a primary backing stitched with closely spaced erect loops of yarn to form a tufted structure, an ethylene/vinyl ester copolymer based hot melt adhesive backsizing composition on the back side of said primary backing and a secondary backing adhered by said backsizing composition to said primary backing, the improvement comprising a secondary backing selected from the group consisting of polyethylene film, polypropylene film and ethylene/vinyl acetate copolymer film having a vinyl acetate content of up to about 18% by weight.
Claim 10
Dependent Claim
84 words
In a carpet comprising a primary backing stitched with closely spaced erect loops of yarn to form a tufted structure, an ethylene/vinyl ester copolymer based hot melt adhesive backsizing composition on the back side of said primary backing and a secondary backing adhered by said backsizing composition to said primary backing, the improvement comprising a secondary backing selected from the group consisting of polyethylene film, polypropylene film and ethylene/vinyl acetate copolymer film having a vinyl acetate content of up to about 18% by weight.
Claim 11
Dependent Claim
32 words
The carpet of claim 8 wherein the ethylene/vinyl ester copolymer of said adhesive composition is ethylene/vinyl acetate copolymer having a vinyl acetate content of from about 10 to about 40% by weight.
Claim 12
Dependent Claim
13 words
The carpet of claim 9 wherein said secondary backing is a polyethylene film.
Claim 13
Dependent Claim
15 words
The carpet of claim 10 wherein said secondary backing is a low density polyethylene film.
Claim 14
Dependent Claim
13 words
The carpet of claim 9 wherein said secondary backing is a polypropylene film.
Claim 15
Dependent Claim
14 words
The carpet of claim 12 wherein said secondary backing is a tactic polypropylene film.
Claim 16
Dependent Claim
28 words
The carpet of claim 9 wherein said secondary backing is an ethylene/vinyl acetate copolymer film having a vinyl acetate content of from about 4 to 12% by weight.
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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |