A hydraulic control device in order to ensure the separation and the approach of a tension cylinder of the drive cylinders of the skins in a device for the treatment of the latter, when the reversing the direction of rotation of the rolls and of the opening of the machine.

摘要

P hydraulic control of the position of cylinders of an apparatus for the treatment of skins and the like. / p & & p & the device comprises a jack 38 comprising a piston 39, 40 with a double action and a piston rod 41, 42 having at its middle part, a thread taper maximum c. The advance of the piston makes it possible to slide a pin 32 in a sleeve 33 over a distance e which corresponds to the distance of the tension cylinder of the treated skin. / p & & p & drying of the skins and the voltage between the rolls without forming streaks and other undesirable markings on the two skins. / p