Press nip formed by a deflection-controlled roll in conjunction

Details Press nip formed by a deflection-controlled roll in conjunction Press nip formed by a deflection-controlled roll in conjunction

1986-07-21

1989-01-10

Falik, Andrew M.

Presses

With additional treatment of material

Cutting, breaking, piercing, or comminuting

100160, 100162B, 100170, 100176, 291161, 291162, 165 89, 34124, B30B 304

Patent

active

047965258

ABSTRACT:
A roll arrangement for calendars or super-calendars is provided by the combination of two rolls which together form a press nip wherein one of the rolls is solely deflection-controllable and the other roll is solely temperature-controllable zone by zone. The temperature-controllable roll has a tubular rotatable roll shell and a stationary core extending through the roll shell. The space between the roll shell and the core is divided by means of several peripheral seals into numerous annular chambers. A flow of fluid is guided through each of the annular chambers. The fluid temperature in each annular chamber is independently controllable. Consequently the temperature-controlled roll shell can be heated by the fluid to different degrees along the axis thereof to control its external diameter along each zone. The peripheral seals are sized to have free play in a direction transverse to the roll axis and are constructed as endless, metallic rings. The external diameter of the rings is a trifle smaller than the internal diameter of the roll shell.

REFERENCES:
patent: Re32586 (1988-02-01), Schiel et al.
patent: 3182587 (1965-05-01), Woodhall
patent: 3362055 (1968-01-01), Bryce
patent: 3643344 (1972-04-01), Strube
patent: 4282638 (1981-08-01), Christ et al.
patent: 4414889 (1983-11-01), Guttinger
patent: 4506421 (1985-03-01), Appenzeller et al.
patent: 4639990 (1987-02-01), Schiel et al.
European Patent Application, 43119; 6-1982.

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