MACHINES AUTOMATIQUE DE FORMATION DE ROULEAUX DE TISSU A LA PIECE, DOTEE D'UN SYSTEME DE MISE EN RETOUR

摘要

A machine for the automatic formation of rolls of piece-fabrics having a pre-established length is provided with a winding up device, a plane on which the fabric is fed, a cutting device actuated by sensor means responsive to signals applied to the fabric or to a counting device, gripper means adapted to seize therebetween the fabric after the cutting operation and carry it to the winding up device, a feeder of cardboard tubes which are the core of the rolls, said feeder comprising means adapted to unwind a sheet of paper from each tube and means for positioning thereafter the tube on the winding up device so that the end of fabric drawn by said gripper means, held between the tube and the unwound sheet of paper, is the origin of a new roll of fabric. An automatic device for discarding the defective fabric is also provided, when the beginning and the end of each defective length of fabric is indicated by previously applied signals. The above mentioned cutting device carries out two cutting operations and the two fabric edges are then joined together by overlapping and the winding up of the roll continued. A device for counting the length of defective fabric is also preferably provided.