The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 1991
Filed:
Dec. 27, 1989
Juha Honkala, Helsinki, FI;
Wilhelm Landin, Ohkola, FI;
Timo Hirvonen, Hyvinkaa, FI;
Seppo Pukkinen, Riihimaki, FI;
Ari Lassila, Espoo, FI;
Valmet Paper Machinery Inc., , FI;
Abstract
The invention concerns a calender, in particular a supercalender, on whose frame (1) a set of rolls (2) is mounted, which comprises an upper roll (3), a lower roll (4), and several intermediate rolls (5) placed between the upper roll and the lower roll. The rolls (3, 4, 5) are supported on the frame (1) by the intermediate structure of the base parts (34, 47, 54) being vertically displaceable along guides (7) provided in the frame. Of the base parts, at least the base parts (54) of the intermediate rolls can be positioned in the vertical direction by means of lifting spindles (6) provided in the frame (1) and by means of spindle nuts (56) provided on the spindle. The base parts (54) of the intermediate rolls are supported on the lifting spindles (6) being vertically displaceable by means of pressure-medium operated relief devices (57) arranged between the base parts (54) and the spindle nuts (56) to reduce the journal loads on the rolls (5). The bearing housings (51) of the intermediate rolls are attached to the base parts (54) being pivotable relative to an articulation shaft (53) parallel to the axes of the rolls (3, 4, 5) and supported on the base parts (54) by means of attenuation devices (10) to equalize the forces resulting from movements of the nips (N.sub.1, N.sub.2, N.sub.3, N.sub.4) between the rolls and to attenuate oscillations of the rolls (5).