The invention relates to an element (1) comprising a first wall (2) made of injected thermoplastic material and a second wall (3) made of porous acoustic absorption material shaped hot on the basis of fibers interconnected by a binder, said first - respect...

The curvature of a plastic lumbar support (22) can be adjusted by springs fitted to attachment points (20) on an internal wire reinforcement grid. The longitudinal (14) and transverse (16, 18) members of the grid are placed in the injection molding tool an...