Patent ES-8602175-A1 (ES)
Title: Supercalender nip relieving arrangement.
IPC: D21G1/00
Filed: 1985-01-22
Abstract: The method is for operating a calender having a vertical stack of rotary rolls, each having at each end a bearing structure with slide block. The slide blocks, and thus the bearing structures, are guided for vertical movement. The rolls are shiftable between a spaced apart independent suspension mode and a nipping mode. - The method comprises in the nipping mode of the rolls, relieving the overhung weight of the bearing structures by imposing such weight onto a load transfer device extending upwardly from a load-supporting base and along the slide blocks. The weight is thus thrust through the load transfer device downwardly against the load-supporting base, maintaining the rolls in straight and parallel nip relation in the nipping mode. (3/8) EPAB- EP-149959 B A calendering apparatus having a vertical stack (10) of a plurality of rotary rolls (12,13,14,15) comprising a top roll (15), a king roll (12) at the bottom of the stack (10) and intermediate rolls (13,14), said king roll (12) having bearing structures (17) at opposite ends, said intermediate rolls (13,14) having respective bearing structures (25) at opposite ends including slide blocks (29) vertical rails (24), said slide blocks (29) having tracking means (32) slidably engaging the rails (24) and comprising piston rod columns (40) extending through said slide blocks (29) hydraulic cylinder and piston assemblies (41,42) in said slide blocks (29) associated with said piston rod columns (40) lower ends of said columns (40) thrusting against a load supporting base (17) and means (50,51,52,53) for hydraulically activity said cylinder and piston assemblies (41,42) for relieving the dead weight of the bearing structure by raising said slide blocks (29) in a nipping mode of said rolls (12,13,14,15), said columns (40) comprising separable rod sections which are in end-to-end abutment in said nipping mode of said rolls (12,13,14,15) characterized in that said king roll bearing structures (17) include slide blocks (27) having tracking means (32) slidably engaging and rails (24), said king roll (12) controlling vertical movement of said intermediate rolls (13,14) between a spaced apart independent suspension mode and said nipping mode, vertical spindles (37) extending along said intermediate roll slide blocks (29 and carrying at spaced selected intervals therealong should means (38) engage by shoulder means (35) on said intermediate roll slide blocks (29) for supporting said rolls (12,13,14,15) in said spaced apart independent suspension mode, said rod sections assuming endwise spacing in said spaced apart independent suspension mode equal to the spacing between the rolls (12,13,14,15) in such mode, and said king roll bearing structure slide blocks \(27) provide said load - EP-149959 B A calendering apparatus having a vertical stack (10) of a plurality of rotary rolls (12,13,14,15) comprising a top roll (15), a king roll (12) at the bottom of the stack (10) and intermediate rolls (13,14), said king roll (12) having bearing structures (17) at opposite ends, said intermediate rolls (13,14) having respective bearing structures (25) at opposite ends including slide blocks (29) vertical rails (24), said slide blocks (29) having tracking means (32) slidably engaging the rails (24) and comprising piston rod columns (40) extending through said slide blocks (29) hydraulic cylinder and piston assemblies (41,42) in said slide blocks (29) associated with said piston rod columns (40) lower ends of said columns (40) thrusting against a load supporting base (17) and means (50,51,52,53) for hydraulically activity said cylinder and piston assemblies (41,42) for relieving the dead weight of the bearing structure by raising said slide blocks (29) in a nipping mode of said rolls (12,13,14,15), said columns (40) comprising separable rod sections which are in end-to-end abutment in said nipping mode of said rolls (12,13,14,15) characterized in that said king roll bearing structures (17) include slide blocks (27) having tracking means (32) slidably engaging and rails (24), said king roll (12) controlling vertical movement of said intermediate rolls (13,14) between a spaced apart independent suspension mode and said nipping mode, vertical spindles (37) extending along said intermediate roll slide blocks (29 and carrying at spaced selected intervals therealong should means (38) engage by shoulder means (35) on said intermediate roll slide blocks (29) for supporting said rolls (12,13,14,15) in said spaced apart independent suspension mode, said rod sections assuming endwise spacing in said spaced apart independent suspension mode equal to the spacing between the rolls (12,13,14,15) in such mode, and said king roll bearing structure slide blocks \(27) provide said load