Sewing – Products – Sewn web or sheet
Patent
1978-03-10
1980-02-26
Cannon, J. C.
Sewing
Products
Sewn web or sheet
2275, 156 735, 428104, 428121, 428122, 428192, 428193, A41D 2724, B29C 2704, B32B 306, B32B 708, C09J 510
Patent
active
041900103
ABSTRACT:
A method is disclosed of forming a seam joining together two edges of a piece of fabric coated on one face with a water-impervious high frequency weldable plastics material, so as to form a water-impervious seam. In the method, the two edges are located together with the said coated faces facing outwardly, a binding strip is located over the said coated faces, the face of the binding strip in contact with the coated faces itself being coated with a high frequency activated material, and a radiofrequency field is applied to the seam to weld together adjacent said coated faces of the binding strip and the fabric. Certain forms of polyurethane and poly(vinyl chloride) are given as examples of high frequency activated materials. A novel seam is also disclosed.
REFERENCES:
patent: 2153352 (1939-04-01), Steinberger
patent: 2372632 (1945-03-01), Webb
patent: 2403756 (1946-07-01), Read
patent: 2406830 (1946-09-01), Haman et al.
patent: 2465374 (1949-03-01), Haman et al.
patent: 2941577 (1960-06-01), Roseman
patent: 2994631 (1961-08-01), Ottinger
patent: 3026225 (1962-03-01), Ostby
patent: 3996082 (1976-12-01), Leatherman
patent: 4010300 (1977-03-01), Wallin
Cannon J. C.
Noel Bibby Limited
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