Patent ID: 6152441
Filing Date: 2000-11-28
Classification: B65H

Abstract:
A method of moving gripper bars for the advance of sheet material in a sheet-processing machine with processing stations each having an upper portion and a lower portion, in whichthe gripper bars are cyclically advanced in an advance plane which extends between the upper and lower portions of the processing stations,in the same cycle the gripper bars are then returned in the opposite direction to the advance direction in a return plane which is displaced in respect of height with respect to the advance plane, the gripper bars being returned between the upper portions and the lower portions of the processing stations,wherein the advance plane is not connected to the return plane, and after termination of the advance movement the gripper bars are set from the advance plane to the return plane and after termination of the return movement the gripper bars are set from the return plane to the advance plane.