Method for producing a trim component of a motor vehicle seat

Method for producing a component (1) for automobile vehicle seat padding, said method comprising the following steps: providing two fabric covering pieces (2), said pieces each comprising a right side face (3), a wrong side face (4) and a binding edge (5); providing a profiled finishing element (6) for a seam zone, said element comprising a decorative bead (8) and a radial protrusion forming a joining part (9) to said edges; providing a flexible foam sealing strip (10); bringing separately and simultaneously into alignment with a sewing needle (21) fed by sewing thread: said edges, said element inserted between said edges and said strip folded in half along its length, a single seam (7) being made so as to join together said edges, said element and said strip.