Abstract: A sheet punching and embossing machine has a gripper carriage and a positioning device for the gripper carriage. The gripper carriage has grippers for clamping sheets, being fixed with limited springing to a transport chain and, by the transport chain, being movable intermittently between the processing stations. The machine further has at least one stop face on its leading side in the running direction. The positioning device contains at least one stop that can be pivoted into the movement path of the gripper carriage and is fixed to a driven pivoting shaft. A pivoting drive of the stop used being at least one electrically operated, controllable servomotor, which is connected directly to the pivoting shaft.

Abstract: A sheet punching and embossing machine includes a stationary table provided with a counter plate, a movable table provided with a punching knife, and a stroke drive for reciprocatingly moving the movable table vertically relative to the counter plate. The reciprocating stroke drive has at least one eccentric shaft mounted in a machine frame and pressure rollers eccentrically mounted on the eccentric shaft. The reciprocating stroke drive further includes a non-uniformly acting mechanism for imparting a non-uniform movement to the movable table.

Abstract: A sheet punching and embossing machine has a gripper carriage and a positioning device for the gripper carriage. The gripper carriage has grippers for clamping sheets, being fixed with limited springing to a transport chain and, by the transport chain, being movable intermittently between the processing stations. The machine further has at least one stop face on its leading side in the running direction. The positioning device contains at least one stop that can be pivoted into the movement path of the gripper carriage and is fixed to a driven pivoting shaft. A pivoting drive of the stop used being at least one electrically operated, controllable servomotor, which is connected directly to the pivoting shaft.

Abstract: A box tube blank having first, second, third, and fourth panels joined together at first, second, third, and forth creases is broken in starting with the blank oriented in a starting plane with the first and third creases superposed and the second and fourth creases outermost. First the second and fourth creases are pressed toward each other parallel to the starting plane to spread the first and third creases away from each other until the second and fourth creases are juxtaposed and the first and third creases lie outermost and the blank lies generally perpendicular to the starting plane. Then the tube blank passes between an upstream pair of parallel rollers extending perpendicular to the starting plane to compress it parallel to the starting plane.