US4906520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Woven fabric from splittable ribbons
Assignee: Invista North America LLC
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Filing: 1988-05-02
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Granted: 1990-03-06
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Expires: 2008-05-02
Abstract
Abstract A fabric, useful as a primary carpet backing, woven in both the warp and weft directions from filmy elements in the form of longitudinally-oriented, splittable ribbons formed from a blend of a major amount of polyester and a minor amount of a polyolefin. The ribbons split longitudinally when punctured by a tufting needle, thus providing for a more secure grip on the tufted carpet yarn than that given by conventional polyester backings. The use of polyester as a principal component overcomes certain drawbacks of polypropylene backings. Alternative processes for making these fabrics, each involving a heat-treating step at a temperature of at least 150° F. (66° C.) for a sufficient period of time to render the ribbons splittable, are also disclosed.
Inventors
- 👤 Vijayendra Kumar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:38
CPC Classifications
D; D03; D03D; D03D15/00; D03D15/40; D03D15/44; D03D15/46; D03D15/20; D03D15/283; D03D15/50; D03D15/573; D10; D10B; D10B2321/00; D10B2321/02; D10B2331/00; D10B2331/04; D10B2503/00; D10B2503/04; D10B2503/041; D10B2503/042; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T442/00; Y10T442/30; Y10T442/3033; Y10T442/3041; Y10T442/3146
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
45 words
A woven fabric, useful as a primary carpet backing, composed in both the warp and the weft directions of filmy elements in the form of longitudinally-oriented, splittable ribbons formed from a blend of a major amount of polyester and a minor amount of a polyolefin.
Claim 2
Dependent Claim
45 words
A woven fabric, useful as a primary carpet backing, composed in both the warp and the weft directions of filmy elements in the form of longitudinally-oriented, splittable ribbons formed from a blend of a major amount of polyester and a minor amount of a polyolefin.
Claim 3
Dependent Claim
11 words
The fabric of claim 1 where the polyester is polyethylene terephthalate.
Claim 4
Dependent Claim
10 words
The fabric of claim 1 where the polyolefin is polyethylene.
Claim 5
Dependent Claim
10 words
The fabric of claim 2 where the polyolefin is polyethylene.
Claim 6
Dependent Claim
23 words
The fabric of either claim 3 or claim 4 where the amount of polyolefin is from 10-25% by weight of the splittable film.
Claim 7
Dependent Claim
42 words
The fabric of claim 1 where the warp ribbons have an average width of about 1.3 mm, the weft ribbons have an average width of about 2.5 mm, and both have a thickness of from about 0.06 mm to about 0.075 mm.
Claim 8
Dependent Claim
89 words
A process for making a woven fabric comprising the steps of: (a) forming a film by extruding a blend comprised of a major amount of polyester and a minor amount of a polyolefin; (b) drawing the film to give it a longitudinal orientation; (c) heat-treating the film at a temperature of at least 150° F. (66° C.) for a sufficient time to render it splittable; (d) slitting the drawn and heat-treated film to form ribbons; (e) weaving a fabric using the ribbons in both the warp and weft directions.
Claim 9
Dependent Claim
89 words
A process for making a woven fabric comprising the steps of: (a) forming a film by extruding a blend comprised of a major amount of polyester and a minor amount of a polyolefin; (b) drawing the film to give it a longitudinal orientation; (c) heat-treating the film at a temperature of at least 150° F. (66° C.) for a sufficient time to render it splittable; (d) slitting the drawn and heat-treated film to form ribbons; (e) weaving a fabric using the ribbons in both the warp and weft directions.
Claim 10
Dependent Claim
87 words
A process for making a woven fabric comprising the steps of: (a) forming a film by extruding a blend comprised of a major amount of polyester and a minor amount of a polyolefin; (b) drawing the film to give it a longitudinal orientation; (c) slitting the drawn film to form ribbons; (d) heat-treating the ribbons at a temperature of at least 150° F. (66° C.) for a sufficient time to render them splittable; (e) weaving a fabric using the ribbons in both the warp and weft directions.
Claim 11
Dependent Claim
87 words
A process for making a woven fabric comprising the steps of: (a) forming a film by extruding a blend comprised of a major amount of polyester and a minor amount of a polyolefin; (b) drawing the film to give it a longitudinal orientation; (c) slitting the drawn film to form ribbons; (d) heat-treating the ribbons at a temperature of at least 150° F. (66° C.) for a sufficient time to render them splittable; (e) weaving a fabric using the ribbons in both the warp and weft directions.
Claim 12
Dependent Claim
87 words
A process for making a woven fabric comprising the steps of: (a) forming a film by extruding a blend comprised of a major amount of polyester and a minor amount of a polyolefin; (b) drawing the film to give it a longitudinal orientation; (c) slitting the drawn film to form ribbons; (d) weaving a fabric using the ribbons in both the warp and weft directions; (e) heat-treating the fabric at a temperature of at least 150° F. (66° C.) for a sufficient time to render it splittable;
Claim 13
Dependent Claim
87 words
A process for making a woven fabric comprising the steps of: (a) forming a film by extruding a blend comprised of a major amount of polyester and a minor amount of a polyolefin; (b) drawing the film to give it a longitudinal orientation; (c) slitting the drawn film to form ribbons; (d) weaving a fabric using the ribbons in both the warp and weft directions; (e) heat-treating the fabric at a temperature of at least 150° F. (66° C.) for a sufficient time to render it splittable;
Claim 14
Dependent Claim
16 words
The process of any of claims 7, 8, or 9 where the polyester is polyethylene terephthalate.
Claim 15
Dependent Claim
10 words
The process of claim 10 where the polyolefin is polyethylene.
Claim 16
Dependent Claim
15 words
The process of any of claims 7, 8, or 9 where the polyolefin is polyethylene.
Claim 17
Dependent Claim
18 words
The process of claim 12 where the amount of polyolefin is from 10-25% by weight of the splittable
Claim 18
Dependent Claim
26 words
The process of claim 12 where the heat treatment is effected at a temperature of about 150° F. (66° C.) to about 350° F. (177° C.).
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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) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |