Calender press roll feed

摘要

The calender has a vertical stack of rotary rolls, each having bearings at each opposite end provided with a thrust shoulder cooperative with a stop shoulder on a respective suspension spindle at each end of the rolls. There are guideways for the bearing structures. - The rolls can move between a lowered mode for spaced independent suspension by stop shoulders and a raised nipping mode relation with one another. The weight of the bearing structures of the rolls in the raised nipping mode relation is relieved as by a cooperating pawl and rack. (4/7) EPAB- EP-138738 B A method of operating a calender having a vertical stack (10) of a plurality of rotary rolls (13,14,15), each of said rolls (13,14,15) having a bearing structure (20,24) at each opposite end provided with a thrust shoulder (32) cooperative with a stop shoulder (34) on a respective suspension spindle (33) at each end of the rolls (13,14,15), means (23) for guiding said bearing structures (20,24) for vertical movement, and means (12) for vertically shifting said rolls (13,14,15) between a lowered mode for spaced apart independent suspension by engagment of said thrust shoulders (32) with said stop shoulders (34) and a raised nipping mode relation with one another wherein said thrust shoulders (32) are raised from said stop shoulders (34), and comprising relieving the weight of said bearing structures (20,24) of said rolls (13,14,15) in said raised nipping mode relation of said rolls (13,14,15), characterised in that said relieving comprises engaging lifting pawls (38) with associated racks (37) and subsequently hydraulically imparting a component of bearing structure lifting force to said pawls (38) are engaged with said racks (37). (10pp) - EP-138738 B A method of operating a calender having a vertical stack (10) of a plurality of rotary rolls (13,14,15), each of said rolls (13,14,15) having a bearing structure (20,24) at each opposite end provided with a thrust shoulder (32) cooperative with a stop shoulder (34) on a respective suspension spindle (33) at each end of the rolls (13,14,15), means (23) for guiding said bearing structures (20,24) for vertical movement, and means (12) for vertically shifting said rolls (13,14,15) between a lowered mode for spaced apart independent suspension by engagement of said thrust shoulders (32) with said stop shoulders (34) and a raised nipping mode relation with one another wherein said thrust shoulders (32) are raised from said stop shoulders (34), and comprising relieving the weight of said bearing structures (20,24) of said rolls (13,14,15) in said raised nipping mode relation of said rolls (13,14,15), characterised in that said relieving comprises engaging lifting pawls (38) with associated racks (37) and subsequently hydraulically imparting a component of bearing structure lifting force to said pawls (38) are engaged with said racks (37).