Abstract: A cover for covering a vehicle seat back is designed to be put into place on the seat back by being turned progressively the rightway out. The cover includes vertical fixing strips designed to penetrate into vertical slots formed in the front face of the foam padding of the seat back to be fixed to fastening members disposed inside the vertical slots. Each fixing strip is a sheet of flexible material having a longitudinal edge sewn to the inside of the cover and a free longitudinal edge that penetrates into the slot to be fixed to the fastening members therein. The free edge is reinforced by an inextensible cord sewn along the free edge and extending without folds along the edge.

Abstract: A seat base framework for vehicle seats includes a frame made of section pieces which includes two lateral longitudinal members and a front cross member. This frame consists of two rigid section pieces which have an overall U-shape, the bases of the two section pieces being arranged parallel to one another toward the front to form the cross member of the frame and the lateral branches of the two section pieces forming the two lateral longitudinal members of the frame in association with two vertical rigid plates, the rear ends of the lateral branches of the same longitudinal member being separated from one another vertically and fastened to one of the rigid plates, and the two section pieces being fastened rigidly to one another at two front fastening points.