Paired roller configuration

Abstract

A paired roller configuration is described and contains a first roller disposed rotatably in a first machine unit and a second roller disposed rotatably in a second machine unit and substantially parallel to the first roller. The first and second rollers guide a web that wraps partly around the first and second rollers. The first roller is disposed such that it can move in the first machine unit and, by at least one connecting unit, is connected to the second roller in such a way that in the event of movement and/or deformation of the first machine unit, the first roller and the second roller remain disposed substantially parallel to each other and at a substantially constant spacing.

I claim:  
     
         1 . A paired roller configuration, comprising: 
 a first machine unit;    a second machine unit;    a first roller disposed rotatably in said first machine unit;    a second roller disposed rotatably in said second machine unit and substantially parallel to said first roller, said first and second rollers guiding a web which wraps partly around said first and second rollers, said first roller disposed such that said first roller can move in said first machine unit; and    at least one connecting unit coupling said first roller to said second roller in such a way that in a event of one of a movement and a deformation of said first machine unit, said first roller and said second roller remain disposed substantially parallel to each other and at a substantially constant spacing.    
     
     
         2 . The paired roller configuration according to  claim 1 , wherein: 
 said first machine unit has a side wall with a surface selected from the group consisting of a rolling surface and a sliding surface; and    said first roller has bearing units, said bearing units each containing at least one element selected from the group consisting of a rolling element and a sliding element, mounted such that said element can roll or slide on said surface of said side wall of said first machine unit.    
     
     
         3 . The paired roller configuration according to  claim 1 , wherein said first roller in said first machine unit is disposed such that the web is fed to said first roller in a direction running substantially perpendicular to a direction of said first machine unit, the direction of said first machine unit defined as a given direction of movement or deformation of said first machine unit.  
     
     
         4 . The paired roller configuration according to  claim 1 , wherein said first roller in said first machine unit is disposed such that the web wraps around said first roller with a wrap angle in an angular range between 45° and 135°.  
     
     
         5 . The paired roller configuration according to  claim 1 , wherein said first roller in said first machine unit is disposed such that said first roller can move substantially horizontally.  
     
     
         6 . The paired roller configuration according to  claim 1 , wherein said first machine unit is disposed upstream of said second machine unit in a web running direction.  
     
     
         7 . The paired roller configuration according to  claim 1 , wherein said first roller is a last cooling roller in a web running direction of a cooling roller group.  
     
     
         8 . The paired roller configuration according to  claim 1 , wherein said second roller is a first roller in a web running direction of a folder.  
     
     
         9 . The paired roller configuration according to  claim 1 , wherein said second roller is a cylindrical web guide element acted on by blown air.  
     
     
         10 . The paired roller configuration according to  claim 1 , 
 wherein said first machine unit has side walls with recesses formed therein, said first machine unit functioning as a cooling roller stand for a web-fed rotary printing machine;    wherein said first roller has bearing units and is a cooling roller through which coolant flows and said first roller is rotatably mounted and displaceably mounted, by said bearing units, said bearing units having supporting rollers disposed in said recesses in said side walls;    wherein said connecting unit has rods with a given length that can be adjusted separately and are in each case attached by a first end to one of said bearing units of said cooling roller and by a second end to said second machine unit; and    said connecting unit has further rods with a length that can be adjusted separately and are in each case attached by a first end to one of said bearing units of said cooling roller and by a second end to said first machine unit.    
     
     
         11 . The paired roller configuration according to  claim 1 , 
 wherein connecting unit has transmitters disposed on said first machine unit and receivers disposed on said second machine unit and each of said transmitter is associated with a respective one of said receivers;    including at least one drive unit for displacing said first roller; data transmission lines; and    including a control unit connected to said transmitters, said receivers and said drive unit through said data transmission lines.    
     
     
         12 . The paired roller configuration according to  claim 4 , wherein said wrap angle is substantially 90°.  
     
     
         13 . The paired roller configuration according to  claim 1 , wherein said first machine unit is disposed downstream of said second machine unit in a web running direction.  
     
     
         14 . The paired roller configuration according to  claim 1 , wherein said second roller is an initial roller in a web running direction of a feed unit disposed upstream of a folder in the web running direction.  
     
     
         15 . The paired roller configuration according to  claim 11 , wherein said transmitters are selected from the group consisting of infrared transmitters, microwave transmitters and ultrasound transmitters.  
     
     
         16 . A web-processing machine, comprising: 
 a first machine unit;    a second machine unit;    a first roller disposed rotatably in said first machine unit;    a second roller disposed rotatably in said second machine unit and substantially parallel to said first roller, said first and second rollers guiding a web which wraps partly around said first and second rollers, said first roller disposed such that said first roller can move in said first machine unit; and    at least one connecting unit coupling said first roller to said second roller in such a way that in a event of one of a movement and a deformation of said first machine unit, said first roller and said second roller remain disposed substantially parallel to each other and at a substantially constant spacing.    
     
     
         17 . The web-processing machine according to  claim 16 , wherein said first machine unit contains at least one element selected from the group consisting of heating elements and cooling elements, said element able to move and deform said first machine unit as a result of material expansion on account of a change in temperature.  
     
     
         18 . The web-processing machine according to  claim 16 , wherein said first machine unit is a cooling roller stand.  
     
     
         19 . The web-processing machine according to  claim 16 , wherein said second machine unit is a folder.  
     
     
         20 . The web-processing machine according to  claim 16 , wherein said second machine unit is a feed unit disposed upstream of a folder in a web running direction.  
     
     
         21 . The web-processing machine according to  claim 16 , wherein said first machine unit is a cooling roller stand disposed one of directly downstream of a web drier, firmly connected to said web drier, and integrated into the web drier.  
     
     
         22 . A web-fed rotary printing machine, comprising: 
 a first machine unit;    a second machine unit;    a first roller disposed rotatably in said first machine unit;    a second roller disposed rotatably in said second machine unit and substantially parallel to said first roller, said first and second rollers guiding a web which wraps partly around said first and second rollers, said first roller disposed such that said first roller can move in said first machine unit; and    at least one connecting unit coupling said first roller to said second roller in such a way that in a event of one of a movement and a deformation of said first machine unit, said first roller and said second roller remain disposed substantially parallel to each other and at a substantially constant spacing.