Gas bag cover for a vehicle occupant restraining system and method for the manufacture therof
First Claim
1. A gas bag cover for a vehicle occupant restraining system comprising an inner side and an outer side, and a tear line inwardly extending from said inner side of the cover as far as a predetermined residual wall thickness and taking a course on said inner side of the cover, wherein the cover has as a major constituent one or more layers in a composite structure, each of said one or more layers being formed 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 ethylene-propylene-diene terpolymer, of block copolymers of alternating polyester and polyether blocks and of block copolymers of polystyrene and polyolefines, wherein said residual wall thickness amounts to between 0.3 and 1 mm along a major part of said course of said tear line, and wherein said tear line, starting from said inner side of the cover, steadily tapers toward said outer side thereof, and wherein said tear line as measured at said inner side of the cover has a width between approximately 120 and 190 μ
- m.
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Accused Products
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.
45 Citations
17 Claims
- 1. A gas bag cover for a vehicle occupant restraining system comprising an inner side and an outer side, and a tear line inwardly extending from said inner side of the cover as far as a predetermined residual wall thickness and taking a course on said inner side of the cover, wherein the cover has as a major constituent one or more layers in a composite structure, each of said one or more layers being formed 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 ethylene-propylene-diene terpolymer, of block copolymers of alternating polyester and polyether blocks and of block copolymers of polystyrene and polyolefines, wherein said residual wall thickness amounts to between 0.3 and 1 mm along a major part of said course of said tear line, and wherein said tear line, starting from said inner side of the cover, steadily tapers toward said outer side thereof, and wherein said tear line as measured at said inner side of the cover has a width between approximately 120 and 190 μ
Specification