US4059465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming carpet tiles
Assignee: Sanquhar Tile Services Ltd
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Filing: 1973-01-09
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Granted: 1977-11-22
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Expires: 1993-01-09
Abstract
Abstract To form carpet tiles that lie flat, a layer of thermoplastic material is doctored onto a carrier sheet and a piece of carpeting to be coated is laid on the layer. The carpet piece has dimensions slightly larger than the desired carpet tile. Heat is applied to the layer to bond the layer of thermoplastic material to the carpet piece and the bonded layer and carpet piece are cooled so as to form a coated carpet piece. The carrier sheet is then stripped from the coated carpet piece and waste is trimmed from the periphery of the bonded carpet piece so as to form a carpet tile. The carrier sheet is supported on a substantially flat surface during the heating and cooling steps so that the carpet piece is maintained in a substantially flat and relaxed condition and the warps and wefts of the carpet piece do not support the weight of the carpet piece.
Inventors
- 👤 John B. Edgar
- 👤 Peter W. Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:44
CPC Classifications
D; D06; D06N; D06N7/00; D06N7/0063; D06N7/0071; D06N7/0081; D06N2201/00; D06N2201/08; D06N2201/082; D06N2203/00; D06N2203/04; D06N2203/045; D06N2203/048; D06N2203/06; D06N2203/061; D06N2203/066; D06N2205/00; D06N2205/20; D06N2209/00; D06N2209/16; D06N2209/1628; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T156/108
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
A method of forming carpet tiles comprising the steps of doctoring a layer of predetermined thickness of thermo-plastics material onto a carrier sheet, laying a piece of carpeting to be coated on said layer, the carpet piece being dimensionally only slightly larger than the desired carpet tile, applying heat to said layer so as to bond the layer of thermo-plastics material to said carpet piece, cooling the bonded layer and carpet piece so as to form a coated carpet piece, stripping the carrier sheet from the coated carpet piece and trimming waste from the periphery of the bonded carpet piece so as to form a carpet tile, and supporting the carrier sheet on a substantially flat surface during said heating and cooling steps whereby the carpet piece is maintained in a substantially flat and relaxed condition and the warps and wefts of the carpet piece do not support the weight of the carpet piece.
Claim 2
Independent Claim
154 words
A method of forming carpet tiles comprising the steps of doctoring a layer of predetermined thickness of thermo-plastics material onto a carrier sheet, laying a piece of carpeting to be coated on said layer, the carpet piece being dimensionally only slightly larger than the desired carpet tile, applying heat to said layer so as to bond the layer of thermo-plastics material to said carpet piece, cooling the bonded layer and carpet piece so as to form a coated carpet piece, stripping the carrier sheet from the coated carpet piece and trimming waste from the periphery of the bonded carpet piece so as to form a carpet tile, and supporting the carrier sheet on a substantially flat surface during said heating and cooling steps whereby the carpet piece is maintained in a substantially flat and relaxed condition and the warps and wefts of the carpet piece do not support the weight of the carpet piece.
Claim 3
Dependent Claim
25 words
The method according to claim 1, wherein said carrier sheet is heat resistant and the heat is applied to said layer through said carrier sheet.
Claim 4
Dependent Claim
27 words
The method according to claim 1, wherein said thermo-plastics material is in the form of a paste and sufficient heat is applied thereto to cause gellation thereof.
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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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |