Controlled deflection roll

Claim 1

A controlled deflection roll comprising: a stationary roll support; a roll shell; means for mounting said roll shell to be rotatable about said stationary roll support; pressure elements arranged between said roll support and said roll shell; said roll shell having opposed end regions; guide elements for rotatably mounting said opposed end regions of said roll shell; said roll support having guide surface means; each guide element having a guide opening bounded by two substantially parallel guide surfaces guided at said guide surface means of said roll support; each of said guide elements having an inner surface; each opposed end region of the roll shell having an outer surface spaced from said inner surface of the related guide element to define therebetween a gap; a respective piston arranged in the roll support at the region of each guide element and actuatable by a pressurized fluid medium for axial movement in said gap in the direction of said inner surface of the related guide element; said piston having a pressure-exerting direction essentially in a pressure plane of the controlled deflection roll and effective in a direction opposite to the direction of pressure exertion by the pressure elements; and each said piston, when actuated, serving to contact said inner surface of the related guide element.