Abstract: A process for the manufacture of a multi-material piece, or element of a piece, notably of thermoplastic material, by localized injection overmolding. The first involves injecting a first plastic material into the volume of a first impression of a completely closed mold. Thereafter, the mold is partially opened to form at least one localized volume of a second impression, which does not extend over the entire surface of the previously injected first part. A second plastic material, different from the first, is locally injected into the localized volume to form at an applied part over the first part.

Abstract: An air bag apparatus for a vehicle having an air bag, a panel with a trap formed therein, a support rib extending over a length of the trap, and a connecting member secured to the trap and to the support rib so as to retain the trap when the trap opens. The trap opens completely when the air bag expands in a direction of expansion. The support rib is oriented in the direction of expansion and is secured to the vehicle. The trap and the connecting member are separate pieces. The support rib has a rigid side adjacent an upper edge of the trap.

Abstract: An air bag apparatus for a vehicle having an air bag, a panel with a trap formed therein, a support rib extending over a length of the trap, and a connecting member secured to the trap and to the support rib so as to retain the trap when the trap opens. The trap opens completely when the air bag expands in a direction of expansion. The support rib is oriented in the direction of expansion and is secured to the vehicle. The trap and the connecting member are separate pieces. The support rib has a rigid side adjacent an upper edge of the trap.