Roller and a device for guiding paper webs

Abstract

A roller and a device for guiding paper w bs to a unit of a rotary printing press includes paper web traction devices. These traction devices may be endless or of finite length. The roller that cooperates with these traction devices includes a passage that receives the traction devices. The axial width of the passage is adjustable.

What is claimed is:  
     
         1 . A device for conveying paper webs comprising: 
 a roller    a traction means for transporting paper webs, said roller including a passage for engagement by said traction means;    a rail-like guide for said traction means, said guide being located selectively upstream and downstream, in a direction of web transport, of said roller and providing a running path for said traction means; and    means in said rail-like guide located selectively directly upstream and downstream of said roller for releasing a partial element of said rail-like guide from said rail-like guide.    
     
     
         2 . The device of  claim 1  wherein said partial element of said rail-like guide is pivotable out of said running path of said traction means.  
     
     
         3 . The device of  claim 1  wherein said partial element of said rail-like guide is selectively movable in one of a left, right, up and down direction with respect to said running path of said traction means.  
     
     
         4 . The device of  claim 1  wherein said partial element of said rail-like guide is selectively movable into and diverging from said running path of said traction means.  
     
     
         5 . The device of  claim 1  wherein said partial element is telescope-like.  
     
     
         6 . The device of  claim 1  wherein said passage is ring-shaped.  
     
     
         7 . The device of  claim 1  wherein said traction means is of finite length.