Method and apparatus for forming an air bag deployment opening

B - Operations – Transporting – 60 – R

Patent

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280/222, 296/84

B60R 21/20 (2006.01) B60R 13/02 (2006.01)

Patent

CA 2008728

A method and apparatus are disclosed for instantly forming an air bag deployment opening in an auto interior trim panel structure such as an instrument penal or steering wheel cover just prior to inflation of the air bag. A delineated pattern of concentrated energy is instantaneously applied to the inside of the trim structure as by ignition of a segment of detonating cord to fracture a section of the trim panel in a required dear shape just before the air bag is inflated. Tha air bag, stared behind the trim panel, engages and pushes open the door so formed in the trim panel when activated, and is able to be deployed through the resulting opening. The trim panel may therefor be free from any exteriorly visible markings defining a deployment door until deployment actually occurs.

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