Patent US4305986A successfully refreshed from Google Patents.
US4305986A
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Tufted carpeting
Assignee: Carl Freudenberg KG
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Filing: 1980-06-27
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Granted: 1981-12-15
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Expires: 2000-06-27
Abstract
Abstract Tufted carpeting having a prime, fabric backing, pile yarn on the front face of and anchored in said prime backing by a latex, a secondary backing covering the rear face of said prime backing and bonded thereto by the latex layer between said backings, said secondary backing being a non-woven fabric made of several, superposed layers of polyester and/or copolyester endless filaments or threads which are deposited in the layers in a tangled arrangement of individual filaments or threads and groups of two or more filaments or threads which lay in part parallel with each other, said filaments or threads being at least partly interbonded and laid in a crossed, parallel texture in the layers by heat and pressure or by a binder applied at spaced intervals, and the spacing between filaments and the applications of binder providing the secondary backing with an air permeability, measured at 0.5 mbar excess air pressure, of at least 120, preferably at least 500, dm 3 m 2 ·s and a weight per unit area in the range of 4 to 150 grams per square meter.
Inventors
- 👤 Ludwig Hartmann
- 👤 Ivo Ruzek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:40
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/005; D04H3/009; D04H3/011; D04H13/00; D04H3/02; D04H3/03; D04H3/08; D04H3/12; D05; D05C; D05C17/00; D05C17/02; D06; D06N; D06N7/00; D06N7/0063; D06N7/0071; D06N7/0081; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/24; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
Tufted carpeting comprising a prime, fabric backing, pile yarn on the front face of and anchored in said prime backing, a secondary backing covering the rear face of said prime backing and a latex layer between said backings, said secondary backing being a non-woven fabric made of several, superposed layers of endless filaments or threads which are deposited in the layers in a tangled arrangement, said filaments or threads in each layer being composed of individual filaments or threads and groups of two or more filaments which lay in part parallel with each other, said filaments or threads being at least partly interbonded and laid in a crossed, parallel texture in the layers, and said filaments being separated in said crossed, parallel texture to the degree providing a variation coefficient of filament separation of more than 100%.
Claim 2
Dependent Claim
137 words
Tufted carpeting comprising a prime, fabric backing, pile yarn on the front face of and anchored in said prime backing, a secondary backing covering the rear face of said prime backing and a latex layer between said backings, said secondary backing being a non-woven fabric made of several, superposed layers of endless filaments or threads which are deposited in the layers in a tangled arrangement, said filaments or threads in each layer being composed of individual filaments or threads and groups of two or more filaments which lay in part parallel with each other, said filaments or threads being at least partly interbonded and laid in a crossed, parallel texture in the layers, and said filaments being separated in said crossed, parallel texture to the degree providing a variation coefficient of filament separation of more than 100%.
Claim 3
Dependent Claim
40 words
Tufted carpeting as claimed in claim 1, wherein said filaments are interbonded by a secondary binder, and the filaments being separated in the crossed, parallel texture to the degree providing a variation coefficient of filament separation of more than 120%.
Claim 4
Dependent Claim
34 words
Tufted carpeting as claimed in claims 1 or 2, characterized by said secondary backing having an air permeability, measured at 0.5 mbar excess air pressure, of at least 120 dm 3 /m 2 ·s.
Claim 5
Dependent Claim
34 words
Tufted carpeting as claimed in claims 1 or 2, characterized by said secondary backing having an air permeability, measured at 0.5 mbar excess air pressure, of at least 500 dm 3 /m 2 ·s.
Claim 6
Dependent Claim
18 words
Tufted carpeting as claimed in claims 1 or 2, wherein said filaments are polyester filaments and/or copolyester filaments.
Claim 7
Dependent Claim
63 words
Tufted carpeting as claimed in claims 1 or 2, wherein said filaments are both (a) polyethylene terephthalate filaments and (b) copolyester filaments consisting of ethylene glycol, terephthalic acid and adipic acid, of butylene glycol, terephthalic acid and adipic acid and/or of butylene glycol, terephthalic acid and isophthalic acid, in a ratio of (a) to (b) in the range of about 85:15 to 75:25.
Claim 8
Dependent Claim
44 words
Tufted carpeting as claimed in claims 1 or 2, wherein said filaments in the crossed, parallel texture of said secondary binder are imprinted in spaced areas with a secondary binder and/or a dye pigment-binder in amounts providing variations in thickness of the secondary backing.
Claim 9
Dependent Claim
30 words
Tufted carpeting as claimed in claims 1 or 2, wherein said secondary backing has a weight per unit area in the range of 4 to 150 grams per square meter.
References Cited (Backward Citations)
US3554854A
Cited
US4107374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |