US 4,235,002 AGranted

Rotary unit for use in calendars or the like

AssigneeKleinewefers GmbH

InventorsJosef Pav, Michael Jakel, Dieter Junk

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Abstract

A rotary cylinder for use in a calender has a roller with a hollow cylindrical sleeve and two trunnions secured to the end portions of the sleeve. The roller contains a coaxial displacing component which defines with the sleeve an annular clearance for the flow of a cooling or heating fluid, such fluid being admitted through one of the trunnions and being evacuated through the one or the other trunnion. One or more prestressed elastic cushions are interposed between the displacing component and the roller to compensate for and to counteract eventual radial and or axial movements of a portion of or the entire displacing component as a result or unequal heating or cooling of the roller and displacing component. A single cushion may constitute a hollow conical frustum or a hollow cylinder. If the roller contains several cushions, such cushions may constitute discrete disks or ribs which are integral with the displacing component and contact the internal surface of the sleeve.

Claims33

Dependent claims

In a rotary unit, such as a cylinder for use in calenders, the combination of a first component which constitutes a hollow roller including an elongated sleeve having first and second end portions, and first and second trunnions at the respective end portions;

an elongated displacing component coaxially mounted in said roller and defining with said sleeve a clearance for the flow of a fluid heat exchange medium, at least one of said trunnions having channel means for admission of said medium into and for evacuation of said medium from said clearance, at least a portion of said displacing component being movable with respect to said first component in at least one of two directions including a first direction axially and a second direction radially of said sleeve;
and compensating means including at least one prestressed elastic cushion interposed between said first component and said portion of said displacing component, said first component having a surface coaxial with said sleeve and in permanent contact with said cushion and said cushion being deformable in response to movement of said portion of said displacing component in said one direction.

Dependencies are inferred from the claim text.