Rotatable roller

Abstract

A rotatable roller has a roller body with channels for guiding a medium through the roller body for controlling the temperature of the roller body. At least one of the channels has a separating member separating the at least one channel into separate channel portions such that media having different properties are separately guided through the at least one channel. At least one deflecting member is arranged in the channels and acts on the medium for imparting an additional flow direction onto the medium flow.

What is claimed is:  
     
         1 . A rotatable roller comprising a roller body having channels configured to guide a medium through the roller body for controlling the temperature of the roller body, wherein at least one of the channels has a separating member separating the at least one channel into separate channel portions such that media having different properties are separately guided through the at least one channel.  
     
     
         2 . The rotatable roller according to  claim 1 , wherein the media differ from one another by at least one of the different properties selected from the group consisting of consistency, temperature, flow direction, and flow speed.  
     
     
         3 . The rotatable roller according to  claim 1 , wherein the separating member is a flat strip.  
     
     
         4 . The rotatable roller according to  claim 1 , wherein the separating member has a triangular shape.  
     
     
         5 . The rotatable roller according to  claim 1 , wherein the separating member is cross-shaped.  
     
     
         6 . The rotatable roller according to  claim 1 , wherein said separating member has a coil shape comprising several turns.  
     
     
         7 . A rotatable roller comprising a roller body having channels configured to guide a medium through the roller body for controlling the temperature of the roller body, further comprising at least one deflecting member arranged in at least one portion of the channels and configured to act on the medium for imparting onto the medium flow, having a substantially axial direction of flow in an axial direction of the rotatable roller, an additional flow direction.  
     
     
         8 . The rotatable roller according to  claim 7 , wherein the deflecting member when mounted has at least over portions thereof a deflecting area positioned at an acute angle to a wall of the channel.  
     
     
         9 . The rotatable roller according to  claim 7 , wherein the deflecting member when mounted has a longitudinal axis in a direction of extension of the channel and wherein the deflecting area at least surrounds the longitudinal axis of the deflecting member.  
     
     
         10 . The rotatable roller according to  claim 9 , wherein the deflecting area comprises the entire deflecting member.  
     
     
         11 . The rotatable roller according to  claim 9 , wherein the longitudinal axis is a rigid center axle.  
     
     
         12 . The rotatable roller according to  claim 9 , wherein the deflecting area forces the medium to rotate.  
     
     
         13 . The rotatable roller according to  claim 9 , wherein the deflecting area has a spiral shape ascending in a longitudinal direction of the deflecting member.  
     
     
         14 . The rotatable roller according to  claim 9 , wherein the deflecting area is formed as a screw.  
     
     
         15 . The rotatable roller according to  claim 8 , wherein the deflecting member is formed as a coil spring.  
     
     
         16 . The rotatable roller according to  claim 8 , wherein at least one of the channels is comprised of parallel channel sections connected by a  180 ° bend.  
     
     
         17 . The rotatable roller according to  claim 16 , wherein at least one of the channels comprises several parallel channel sections and several  180 ° bends.  
     
     
         18 . The rotatable roller according to  claim 8 , wherein the channels have inlets and outlets, wherein at least one of the channels has a number of inlets that differs from a number of outlets.  
     
     
         19 . The rotatable roller according to  claim 8 , comprising a central axial hollow space, wherein at least one of the deflecting members is arranged in the central axial hollow space.  
     
     
         20 . The rotatable roller according to  claim 8 , wherein the deflecting member has deflecting areas with different ascending gradients.  
     
     
         21 . The rotatable roller according to  claim 9 , wherein the deflecting member has a longitudinal axle having a varying diameter over the length of the longitudinal axle.  
     
     
         22 . The rotatable roller according to  claim 8 , wherein the deflecting member is helically shaped and has central cutouts of varying diameter along a length of the deflecting member.  
     
     
         23 . The rotatable roller according to  claim 7 , wherein the deflecting member has several deflecting areas and wherein the deflecting areas are spaced at different spacings to one another.  
     
     
         24 . The rotatable roller according to  claim 7 , wherein the deflecting members have deflecting areas that are arranged randomly for generating chaotic flows.  
     
     
         25 . A deflecting member for use in a channel through which a medium flows for controlling a temperature of a rotatable roller, the deflecting member having a longitudinal axis and comprising at least one deflecting area positioned at an incline relative to the longitudinal axis.  
     
     
         26 . The deflecting member according to  claim 25 , wherein the deflecting area has a spiral shape or a helix shape surrounding the longitudinal axis.