Roll for treatment of paper webs or the like

Details Roll for treatment of paper webs or the like Roll for treatment of paper webs or the like

1981-03-18

1984-09-25

Footland, Lenard A.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

384117, B21B 1302

Patent

active

044728654

ABSTRACT:
A roll for pressure treatment of paper webs has a stationary shaft which is spacedly surrounded by the concave cylindrical internal surface of a rotary sleeve. The shaft carries a row of pressure shoes which define therewith plenum chambers for a hydraulic fluid serving to urge the convex cylindrical external surfaces of the shoes toward the internal surface of the sleeve. Each external surface has a centrally located primary hydrostatic bearing pocket which communicates with the respective plenum chamber and a set of four auxiliary hydrostatic bearing pockets which surround the respective primary pocket and receive only that hydraulic fluid which overflows the lands between the primary pocket and the auxiliary pockets. The pockets in each external surface are surrounded by a marginal portion of such surface and the primary pocket has arms which extend to the marginal portion and each of which is flanked by a pair of auxiliary pockets. The arms of the primary pocket are parallel to the longitudinal axis of the sleeve and/or to an axis which is normal to the longitudinal axis. The auxiliary pockets form groups which make oblique angles with the two axes. If the external surfaces of the shoes are rectangular, the groups of auxiliary pockets extend substantially diagonally of the respective external surfaces.

REFERENCES:
patent: 3802044 (1974-04-01), Spillman et al.
patent: 3846883 (1974-11-01), Biondetti
patent: 4064607 (1977-12-01), Wolf
patent: 4325585 (1982-04-01), Sugita

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