Method for transferring signatures and gripper assembly for a matched velocity transfer device

摘要

A method for transferring signatures is described. A gripper assembly contains a gripper bar having a gripper and a pivot arm having a gripper seat. The gripper assembly is moved such that the gripper projects through a space in front of a leading edge of a signature being delivered on a transport system. The gripper assembly is moved such that the gripper seat is directly aligned with the leading edge of the signature and the gripper seat is travelling at the same velocity as the signature. The gripper is driven in a direction of the gripper seat such that the signature is held between the gripper and the gripper seat. In this manner the velocity of the signature is not changed during the handoff. In addition, a gripper assembly for performing the handoff is described.