Calender for pressure and thermal treatment of material webs
AssigneeSulzer-Escher Wyss GmbH
InventorsRolf Lehmann, Alfred Christ
Life of this patent
Estimating the term…
Abstract
At least one roll of the calender is heated and provided with heat insulating shields pivotably mounted on the sides of the calender and heat insulating end covers disposed at the ends of the rolls. A counter roll (controlled deflection roll) cooperates with the heated roll in the direction of its pressure or pressing action. The counter roll is provided with a cooling device (blower device) which is capable of being regulated in zones for cooling the surface of the counter roll.
Claims11
A calender for the pressure and thermal treatment of sheet material of plastic or textile or both, comprising:
- at least one heated roll having two end faces and a circumferential region;
- at least one counter roll cooperating with said at least one heated roll at a contact pressure region;
- thermal insulating protective shields pivotally mounted at said circumferential region of said at least one heated roll to pivot away therefrom;
- thermal insulating end seals disposed in proximity to said end faces of said at least one heated roll;
- said at least one counter roll being a controlled deflection roll;
- said controlled deflection roll comprising:
- means for locally regulating a contact pressure force between the controlled deflection roll and said at least one heated roll;
- and
- a substantially cylindrical roll shell of highly elastic material and of low thermal conductivity;
- locally regulatable cooling means for cooling the surface of the controlled deflection roll;
- and
- said cooling means being disposed on an outbound side of said controlled deflection roll in the vicinity of said contact pressure region.
A roll device, comprising:
- at least one heated roll having two end faces and a circumferential region;
- at least one counter roll cooperating with said heated roll at a contact pressure region;
- at least one thermal insulating protective shield pivotally mounted adjacent said circumferential region of said at least one heated roll to pivot away therefrom and form a gap in relation thereto;
- at least one thermal insulating end seal disposed in proximity to a related end face of said at least one heated roll;
- said counter roll being a controlled deflection roll;
- said controlled deflection roll comprising:
- means for regulating a contact pressure force between the controlled deflection roll and said at least one heated roll;
- and
- a substantially cylindrical roll shell of highly elastic material and of low thermal conductivity;
- cooling means cooperating with said controlled deflection roll;
- and
- said cooling means being disposed on an outbound side of said controlled deflection roll in the vicinity of said contact pressure region.
Dependencies are inferred from the claim text.