Patent US4412877A successfully refreshed from Google Patents.
US4412877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Embossing secondary backings of carpets
Assignee: EIDP Inc
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Filing: 1982-04-21
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Granted: 1983-11-01
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Expires: 2002-04-21
Abstract
Abstract An improved process is provided for making tufted carpets having bonded nonwoven fabric secondary backings. After the secondary backing has been laminated to a back-sized and tufted primary backing to form a carpet composite, the composite is passed through a nip to emboss the secondary backing and provide a less stiff, easier to install carpet.
Inventors
- 👤 William G. Vosburgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:39
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/022; D; D06; D06N; D06N7/00; D06N7/0063; D06N7/0071; D06N7/0073; D06N7/0081; B32B2323/00; B32B2323/10; B32B2471/00; B32B2471/02; D06N2201/00; D06N2201/02; D06N2201/0254; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023; Y10T156/1039; Y10T156/1041; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1737; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/23986; Y10T428/24; Y10T428/24479; Y10T428/24612
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
In a tufted-carpet process wherein a primary backing is tufted, back-sized and then laminated to a bonded, nonwoven fabric, secondary backing to form a carpet composite, the improvement comprising embossing the secondary backing after it has become an integral part of the carpet composite at a temperature and under a load such that an embossed pattern is formed in the secondary backing and the force required to stretch the carpet composite one-half percent is decreased to less than 70 percent of the force required prior to the embossing step.
Claim 2
Dependent Claim
89 words
In a tufted-carpet process wherein a primary backing is tufted, back-sized and then laminated to a bonded, nonwoven fabric, secondary backing to form a carpet composite, the improvement comprising embossing the secondary backing after it has become an integral part of the carpet composite at a temperature and under a load such that an embossed pattern is formed in the secondary backing and the force required to stretch the carpet composite one-half percent is decreased to less than 70 percent of the force required prior to the embossing step.
Claim 3
Dependent Claim
38 words
A process of claim 1 wherein the secondary backing is embossed by passing the carpet composite through a nip formed by an embossing roll and a back-up roll, the secondary backing contacting the embossing roll in the nip.
Claim 4
Dependent Claim
52 words
A process of claim 2 wherein the temperature is in the range of 90° to 200° C., the nip load is in the range of 90 to 1800 newtons per centimeter and the composite is passed through the nip at a speed in the range of 0.5 to 40 meters per minute.
Claim 5
Dependent Claim
58 words
A process of claim 1 wherein the secondary backing is embossed by passing the composite through two nips formed by an embossing roll and two back-up rolls located about 180 degrees apart with respect to the embossing roll surface, the secondary backing contacting the embossing roll in each of the nips and each of the nips being unheated.
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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) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |