Patent ID: 8819953

Claim:
An apparatus for revealing a geometry of operative cylinders, in particular during a grinding operation of the cylinders, comprising: a pair of clamps ( 13 , 14 ) configured to be moved away from and towards each other with respect to a fixed intermediate structure ( 15 ), said clamps ( 13 , 14 ) having tilted surfaces ( 19 , 20 ) in opposite diverging directions from each other with respect to a cylinder ( 11 ) to be measured, said clamps being configured to have the cylinder positioned therebetween and between a surface ( 21 ) of said fixed intermediate structure ( 15 ), wherein said surfaces ( 19 , 20 ) of said clamps ( 13 , 14 ) and said surface ( 21 ) of said fixed intermediate structure ( 15 ) are always kept in contact with said cylinder ( 11 ) regardless of whether said cylinder is still or rotating, wherein said fixed structure ( 15 ) has, in its interior, parts of a group which interact with each other ( 32 , 33 ; 29 , 43 ; 28 , 35 , 36 , 37 , 38 ) to correlate a movement of said clamps ( 13 , 14 ), wherein said group comprises upper movable arms or parts ( 32 ) and lower movable arms or parts ( 33 ) carrying said clamps ( 13 , 14 ) and connected in synchronous movement in opposite directions with a cable or wire system ( 43 ) and pulley ( 29 ), and wherein said upper and lower movable arms or parts have different weights, said upper movable arm or part ( 32 ) having a greater weight than said lower movable arm or part ( 33 ), wherein a difference in weight between the said upper and lower movable parts or arms lifts the lower movable arm or part ( 33 ).