Device for aligning sheets deposited on a sheet stack

Abstract

A device for aligning sheets in the delivery of a sheet processing machine has leading edge stops that are pivotable about two mutually parallel axes of rotation. The leading edge stops are disposed on a common crossmember, and they can be selectively pivoted downward about one pivot axis or upward about the other pivot axis as desired.

1 . A device for aligning sheets on a sheet stack, comprising: 
 a plurality of leading edge stops mounted for selectively pivoting about an upper pivot axis and about a lower pivot axis, wherein said upper pivot axis and said lower pivot axis are parallel to one another.    
   
   
       2 . The device according to  claim 1 , which comprises a crossmember and levers mounted to said crossmember, and wherein said leading edge stops are commonly disposed on said crossmember and pivoted about said upper pivot axis by way of said levers.  
   
   
       3 . The device according to  claim 2 , which comprises couplers configured to enable said leading edge stops to be pivoted about said lower pivot axis.  
   
   
       4 . The device according to  claim 1 , which comprises a drive device disposed at said lower pivot axis for cyclically pivoting said leading edge stops.  
   
   
       5 . The device according to  claim 1 , configured for aligning sheets in a delivery of a sheet processing machine.  
   
   
       6 . In combination with a printing press, the device according to  claim 1  configured for aligning sheets in a delivery of the press.