Method for the manufacture of a gas bag cover using laser scorin

Details Method for the manufacture of a gas bag cover using laser scorin Method for the manufacture of a gas bag cover using laser scorin

1998-07-15

1999-10-19

Mills, Gregory

Electric heating

Metal heating

By arc

21912185, B23K 2600

Patent

active

059683813

ABSTRACT:
The invention relates to a gas bag cover for a vehicle occupant restraining system wherein said cover has a tear line extending from the inner side thereof as far as a predetermined residual wall thickness and to a method for the production thereof. The cover is characterized in that as a main component thereof it comprises one or more layers in a composite structure of a material selected from the group consisting of elastomer alloys of a thermoplastic polymer with a non-cross linked, partly cross-linked or completely cross-linked EPDM terpolymer, of block copolymers of alternating polyester and polyether blocks and of block copolymers of polystyrene and polyolefines, in that the residual wall thickness amounts to between 0.3 and 1 mm along the major part of the course of the tear line, and in that the tear line, starting from an inner side of the cover, steadily tapers toward an outer side thereof. The tear line is produced with the aid of a laser from the inner side of the cover.

REFERENCES:
patent: 3626143 (1971-12-01), Fry
patent: 5013065 (1991-05-01), Kreuzer
patent: 5335935 (1994-08-01), Proos et al.
patent: 5632914 (1997-05-01), Hagenow et al.
patent: 5744776 (1998-04-01), Bauer
patent: 5882572 (1999-03-01), Lutze et al.
patent: 5883356 (1999-03-01), Bauer et al.
Anonymous, "Integrated Passenger Side Inflatable Restraint Door with Laser-Generated Tear Seam," Research Disclosure, 35603, Dec. 1993.
Hecht, J., "The Laser Guidebook 2nd Edition,"McGraw Hill, New York, pp. 159-183, 1992.

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