Calendering apparatus using inductive heating for hot-calenderin

Details Calendering apparatus using inductive heating for hot-calenderin Calendering apparatus using inductive heating for hot-calenderin

1987-08-10

1989-04-25

Falik, Andrew M.

Presses

With additional treatment of material

Cutting, breaking, piercing, or comminuting

100 38, 219 1061R, 162206, B30B 1534, B30B 304

Patent

active

048236888

ABSTRACT:
In a calendering apparatus for hot-calendering a paper web, the apparatus includes a rotatable calendering roll defining a smooth calendering surface. A backing roll rotatably cooperates with the calendering roll for defining therebetween a calendering nip for the passage therethrough of the web. An induction heater is disposed in close proximity to the calendering surface nip for inducing eddy currents within the calendering roll such that the calendering roll is heated. A blow box is disposed in close proximity to the calendering surface and between the heater and the nip. The blow box defines a plurality of compartments which are disposed in a cross-machine direction. Each of the compartments selectively blows a current of cooling air against the calendering surface for controlling the temperature of the calendering surface so that the temperature of the calendering surface adjacent to the nip is controlled in a cross-machine direction.

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