Apparatus for Controlling the Lateral Displacement of at least One Material Web with a Lath Securing Device

Abstract

An apparatus for controlling the lateral displacement of at least one material web, comprising one roller pivoting about a shaft, which roller comprises laths that extend in the direction of the shaft and that are arranged in circumferential direction of the roller, whereas each lath is mounted in such a way that it can be moved in the direction of the shaft. Furthermore the roller comprises at least one lath guiding device on which the movable laths are guided, whereas the lath guiding device comprises for each lath a respective region for guiding each individual lath. According to the invention the roller comprises at least one lath securing device which is used to protect the laths from being detached from the apparatus when the region for guiding the respective lath is defective, whereas the lath securing device comprises for each lath a respective region for securing each individual lath.

1 . An apparatus for controlling the lateral displacement of at least one material web, the apparatus comprises at least one roller pivoting about a shaft, wherein the roller comprises:
 laths that extend in the direction of the shaft and that are arranged in circumferential direction of the roller, wherein each lath is mounted in such a way that it can be moved in the direction of the shaft,   at least one lath guiding device on which the movable laths are guided, wherein the lath guiding device comprises for each lath a respective region for guiding the laths, and   at least a lath securing device which can be used to protect the laths from being detached from the apparatus when the region for guiding the respective lath is defective, wherein the lath securing device comprises for each of the laths a respective region for securing the laths.   
     
     
         2 . An apparatus according to  claim 1 , wherein the respective region for securing the laths is arranged in the interior of the respective lath. 
     
     
         3 . An apparatus according to  claim 1 , wherein the region for securing the laths comprises a header area which is able to protect the lath from being detached from the apparatus when the region for guiding the respective lath is defective. 
     
     
         4 . An apparatus according to  claim 1 , wherein the lath securing device is attached to the lath guiding device. 
     
     
         5 . An apparatus according to  claim 1 , wherein the lath securing device is ring-shaped. 
     
     
         6 . An apparatus according to  claim 1 , wherein the lath guiding device consists of a first material, and wherein the lath securing device consists of a second material which has greater hardness, abrasion resistance, or both hardness and abrasion resistance than the first material. 
     
     
         7 . An apparatus according to  claim 1 , wherein the second material comprises metal, in particular steel. 
     
     
         8 . An apparatus according to  claim 1 , wherein the first material comprises plastic material. 
     
     
         9 . An apparatus according to  claim 1 , wherein the lath guiding device comprises at least a recess which is able to receive the lath in a gliding manner so that the lath can be guided on the lath guiding device. 
     
     
         10 . An apparatus according to  claim 1 , wherein the cross-section of a lath comprises:
 a central support region on which at least one material web can be placed,   a side region on each side of the central support region with respect to a perpendicular running in radial direction, and   a holding region adjacent to each of the side regions, wherein the holding region runs basically at right angles to the perpendicular.   
     
     
         11 . An apparatus according to  claim 10 , wherein the lath guiding device comprises a recess on each side with respect to the perpendicular, which basically run at right angles to the perpendicular, and wherein the recesses are able to receive in a gliding manner the holding regions of the lath in order to guide the lath on the lath guiding device. 
     
     
         12 . An apparatus according to  claim 9 , wherein the region for securing the laths comprises a recess that is larger than the recess of the region for guiding the laths. 
     
     
         13 . An apparatus according to  claim 1 , wherein the lath guiding device is ring-shaped. 
     
     
         14 . An apparatus according to  claim 1 , wherein the lath guiding device is firmly connected with a basic roller body of the roller which basic roller body is pivoting about the shaft. 
     
     
         15 . An apparatus according to  claim 1 , wherein damage to the region for guiding the laths involves that the region for guiding the laths is worn out or is breaking off of the lath guiding device.