Patent US4376146A successfully refreshed from Google Patents.
US4376146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weft insertion knitted secondary carpet backing
Assignee: LINQ INDUSTRIAL FABRICS Inc A CORP OF
•
Filing: 1981-02-11
•
Granted: 1983-03-08
•
Expires: 2001-02-11
Abstract
Abstract A secondary carpet backing for adherence to the underside of a carpet material via an adhesive. The secondary carpet backing comprises a weft inserted knit material having a series of warp yarns forming spaced rows of warp-wise extending chain stitches, and a series of weft yarns forming spaced rows extending transversely of the series of warp yarns. The weft yarns are laid in the chain stitches and serve to interconnect adjacent rows of the warp yarns. The warp yarns have a denier in the range of 300-700 and the weft yarns have a denier in the range of 1300-2300. Such a secondary carpet backing exhibits improved adhesion characteristics when adhered to the underside of a carpet material with a conventional adhesive.
Inventors
- 👤 Tibor Juhasz
- 👤 Hans E. Heyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:23
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/14; D04B21/16; D10; D10B; D10B2503/00; D10B2503/04; D10B2503/041; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
107 words
A carpet structure comprising: a primary carpet backing having a first surface having pile fibers extending therefrom and secured to said primary carpet backing, and a second surface; and a secondary carpet backing adhesively secured to said second surface of said primary carpet backing, said secondary carpet backing comprising a weft inserted knit material having a series of warp yarns forming spaced or interconnected rows of warp-wise extending knitted stitches and a series of weft yarns forming a series of spaced rows extending transversely of said series of warp yarns, said weft yarns being laid in said knitted stitches and interconnecting adjacent rows of said warp yarns.
Claim 2
Dependent Claim
107 words
A carpet structure comprising: a primary carpet backing having a first surface having pile fibers extending therefrom and secured to said primary carpet backing, and a second surface; and a secondary carpet backing adhesively secured to said second surface of said primary carpet backing, said secondary carpet backing comprising a weft inserted knit material having a series of warp yarns forming spaced or interconnected rows of warp-wise extending knitted stitches and a series of weft yarns forming a series of spaced rows extending transversely of said series of warp yarns, said weft yarns being laid in said knitted stitches and interconnecting adjacent rows of said warp yarns.
Claim 3
Dependent Claim
17 words
The carpet structure of claim 1 wherein said warp yarns are made of an oriented polyolefin material.
Claim 4
Dependent Claim
16 words
The carpet structure of claim 2 wherein said warp yarns comprise flat filaments of polyolefin material.
Claim 5
Dependent Claim
17 words
The carpet structure of claim 3 wherein said weft yarns are made of an oriented polyolefin material.
Claim 6
Dependent Claim
17 words
The carpet structure of claim 4 wherein said weft yarns are made from a monofilament polyolefin material.
Claim 7
Dependent Claim
16 words
The carpet structure of claim 5 wherein said weft yarns comprise flat ribbons of polyolefin material.
Claim 8
Dependent Claim
30 words
The carpet structure of claim 4 wherein said flat filaments comprising said warp yarns are twisted to provide a complex curvature for the surface of said weft inserted knit material.
Claim 9
Dependent Claim
20 words
The carpet structure of claim 1 wherein said warp yarns and said weft yarns are made from a polypropylene material.
Claim 10
Dependent Claim
16 words
The carpet structure of claim 1 wherein said warp yarns have a denier of approximately 500.
Claim 11
Dependent Claim
22 words
The carpet structure of claim 1 wherein the spacing of said warp yarns is in the range of 10-20 yarns per inch.
Claim 12
Dependent Claim
22 words
The carpet structure of claim 10 wherein the spacing of said warp yarns is in the range of 5-15 yarns per inch.
Claim 13
Dependent Claim
16 words
The carpet structure of claim 1 wherein said warp-wise extending knitted stitches comprise ladder chain stitches.
Claim 14
Dependent Claim
25 words
The carpet structure of claim 1 wherein the knitted stitches are chain stitches and the warp yarns form spaced rows of warp-wise extending chain stitches.
Claim 15
Dependent Claim
30 words
The carpet structure of claim 1 wherein said warp yarns have a denier in the range of 300-700 and said weft yarns have a denier in the range of 1300-2300.
Claim 16
Dependent Claim
13 words
The carpet structure of claim 1 wherein said knitted stitches are tricot stitches.
References Cited (Backward Citations)
US3853680A
Cited
US4145467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-07 | 1986-09-06 | 1987-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-07 | 1990-09-06 | 1991-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-07 | 1994-09-06 | 1995-03-08 | $7700.00 | Window Closed / Lapsed |