Patent ID: 8156802

Claim:
A roller for deflection of a web of material ( 2 ), with the roller ( 1 ) being supported on a plate ( 7 ) which is operatively connected to a force sensor ( 10 ) for measurement of a bearing force ( 3 ) of the roller ( 1 ), which force sensor ( 10 ) has a base element ( 20 ) on which at least one sensor element ( 25 ) is provided which has at least one plate ( 40 ) which can be deformed elastically by the bearing force ( 3 ), and characterized in that the plate ( 7 ) which supports the roller ( 1 ) is held such that it can pivot about a pivoting bearing ( 8 ) which is supported on a stationary plate ( 9 ), with the force sensor ( 10 ) being provided between the plate ( 7 ) which can pivot and the stationary plate ( 8 ), and with the elastically deformable plate ( 40 ) being fitted with at least one force pickup ( 42 ), and with the sensor element ( 25 ) being loaded by a pressure piece ( 29 ), with the bearing force ( 3 ) being introduced into the pressure piece ( 29 ) via at least one spring ( 32 ) which—seen in the force direction—has a greater spring movement for the same load than the elastically deformable plate ( 40 ), and with the pressure piece ( 29 ) being able to be pressed flat against an annular stop ( 35 ) in order to limit the force acting on the sensor element ( 25 ), which annular stop ( 35 ) is provided around the sensor element ( 25 , wherein the bearing force ( 3 ) is introduced into the pressure piece ( 29 ) via at least one spring ( 32 ) which—seen in the force direction—has a greater spring movement for the same load than the elastically deformable plate ( 40 ), and at least one spring element ( 43 ) is provided between the force pickup ( 42 ) and the elastically deformable plate ( 40 ) in order to limit the force acting on the force pickup ( 42 ).