Abstract: A punching device for automatic punching machines for the punching of paper, cardboard and the like, comprising: a driving mechanism for a top shoe; such as a rocking lever drive, elliptical cam drive, or wedge-form transmission; a stationary bottom shoe supporting a counter-punch; a movable top shoe supporting punch knives; and a gripper bar arrangement for intermittent forwarding through the punching device of sheets to be punched wherein the drive mechanism for the top shoe is located between the top shoe and a yoke which is connected with the bottom shoe through prestressed tie rods.

Abstract: A punching device for automatic punching machines for the punching of paper, cardboard and the like, comprising: a driving mechanism for a top shoe; such as a rocking lever drive, elliptical cam drive, or wedge-form transmission; a stationary bottom shoe supporting a counter-punch; a movable top shoe supporting punch knives; and a gripper bar arrangement for intermittent forwarding through the punching device of sheets to be punched wherein the drive mechanism for the top shoe is located between the top shoe and a yoke which is connected with the bottom shoe through prestressed tie rods.

Abstract: A punching device for automatic punching machines for the punching of paper, cardboard and the like, comprising: impulsion means for a top shoe; such as an eccentric cam drive; a stationary bottom shoe supporting a counterpunch; a movable top shoe supporting punch knives; and a gripper bar arrangement for intermittent forwarding through the punching device of sheets to be punched wherein the impulsion means for the top shoe is located between the top shoe and a yoke which is connected with the bottom shoe through prestressed tie rods.

Abstract: In a gripping equipment for sheet-processing machines wherein sheets are engaged by grippers moved along by driven chains and are forwarded intermittently from one station to the next, wherein the grippers are carried by a gripper shaft and are supported at their ends for swivelling movement about an axis parallel to the longitudinal axis of the gripping equipment, the improvement wherein the gripping equipment comprises a carriage having fixedly-supported rollers at the one end and resiliently-supported rollers at the other end for rolling on guideways at the stations to effect guidance transverse to the course direction of the carriage. Each of the leading ends of the gripper carriage is supported on one chain link for rotation about an axis parallel to the gripper shaft and counter to spring resilience. The carriage is guided by a roller and a roller guideway independent of the chain track.