A displacement-free, flat sewing result and an accurately trimmed fabric edge are the conditions for an unproblematic further processing of padded upholstery parts. The sophisticated, bobbinless chainstitch sewing technique of class 195-671110 as well as the high sewing speed, the large stitch length and the spacious clearance under the arm guarantee an unhindered and continuous manufacturing process resulting in a high productivity. The alternating, differential feeding system and the solid egde trimmer with high knife stroke allow an excellent processing quality and a precise trimming of all filling materials usual in the trade, even in case of voluminous multi-ply workpieces.