Patent ID: 6679819
Filing Date: 2004-01-20
Classification: D21G,F16C

Abstract:
A roll in a paper/board machine or a finishing machine, said roll comprising:a stationary axle; a cylindrical roll shell rotatable mounted on said stationary axle, said cylindrical roll shell being structured and arranged such that clearance space is defined between said stationary axle and an inner surface of the roll shell; a loading element operated by hydraulic fluid, said loading element including a slide shoe structured and arranged to place a load against said inner surface of the roll shell to thereby control the distribution of a nip pressure at a nip defined between said roll shell and a counter roll in said paper/board machine or finishing machine; wherein said loading element comprises first and second stabilizing chambers, each one of said stabilizing chambers being located on either side of said nip, and means for eliminating at least one of a nip-load induced deflection of the roll shell and a deflection of the roll shell caused by said hydraulic fluid; wherein said means for eliminating at least one of a nip-load induced deflection of the roll shell and a deflection of the roll shell caused by said hydraulic fluid comprises: an unpressurized space defined by the slide shoe, said unpressurized space being arranged in line with said nip, said unpressurized space permitting a free inward deflection of the roll shell.