Rotary pre-gripper for feeding sheets has first gripper system associated by staybolts with shaft whose axis is coaxial with hollow shaft carrying second gripper system and provided with radial slots on line of staybolts

摘要

The rotary pre-gripper has first and second non-uniformly circulating gripper systems (2,3) that are driven by means of non-uniform ratio transmission. The first gripper system is associated by staybolts (24) with a shaft (21) whose axis is coaxial with a hollow shaft (31) carrying the second gripper system and provided with radial slots on the line of the staybolts.