Method for welding at least one region of an overlay sheet to a

Details Method for welding at least one region of an overlay sheet to a Method for welding at least one region of an overlay sheet to a

1991-05-29

1993-02-16

Evans, Geoffrey S.

Electric heating

Metal heating

Of cylinders

219 1063, 219 1081, 219 7801, 219 7802, 1563802, 1563806, 1562722, B23K 1302

Patent

active

051873400

ABSTRACT:
A method for welding at least one region of an overlay sheet (16) to a receiving surface of a carrier layer (14) by means of high frequency energy. In the method, on the surface remote from the receiving surface of the carrier layer (14) a foil (12) of electrically conductive material is disposed. The overlay sheet (16) is placed at least on a part of the receiving surface of the carrier layer (14). A high frequency electrode (18, 20) is placed onto the overlay sheet (16) in the region to be welded to the carrier layer (14) and a ground electrode (22) is placed onto a region of the overlay sheet (16) not to be welded to the carrier layer (14) or onto a part of the receiving surface not covered by the overlay sheet (16), said ground electrode (22) having an area which is greater than that of the high frequency electrode (18, 20). The high frequency energy is then switched on while the high frequency electrode ( 18, 20) is held with pressure against the overlay sheet (16).

REFERENCES:
patent: 2903543 (1959-09-01), Rueggeberg
patent: 3897593 (1975-07-01), Becker
patent: 4124430 (1978-11-01), Peterson
patent: 4352709 (1982-10-01), Urai et al.
patent: 4451721 (1984-05-01), Nemeskeri
patent: 4452943 (1984-06-01), Goldman
patent: 4829152 (1989-05-01), Rostoker et al.
patent: 4950347 (1990-08-01), Futagawa
Patent Abstracts of Japan, vol. 9, No. 111, May 1985 (Japanese Patent Application 59-232820--Yoshino published Dec. 1984).

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