Abstract: Calender (1) for calendering a paper or board web (2), having at least one nip (3), which is formed between a heatable roll (4) and a mating element (5), a device (6) for producing a predetermined pressure in the nip (3), and a web treatment device (7) arranged upstream of the nip (3) and having two contact surfaces (9, 10) forming a treatment nip (8), one of which is a circulating contact surface (9) which is formed by a belt (14) circulating on guide rolls (11, 12, 13), the other contact surface (10) is formed by the circulating surface of the heatable roll (4), and the treatment nip (8) extends along an angle (15) of the wrap of the heatable roll (4), wherein, in order to increase the thermal efficiency of the transfer of heat, the circulating belt (14) uses a resilient surface to press the paper or board web (2) onto the heatable roll (4), and the guide rolls (11, 12, 13) control sectional forces of the circulating belt (14) in the treatment nip (8).

Abstract: A calender (1) for calendering a paper web (2), in particular made from paper suitable for gravure printing, having at least one roll stack which in each case has an upper and a lower end roll (4.1, 4.2) and intermediate rolls (5.1, 5.2, 5.3, 5.4), one of the two end rolls (4.1) delimits a first working nip (3) of the roll stack depending on the guidance of the paper web (2), and the rolls (4.1, 4.2, 5.1, 5.2, 5.3, 5.4) are hard rolls (4.1, 5.2, 5.4) and soft rolls (5.1, 5.3, 4.2) in order to form loadable working nips in the form of soft nips, the end roll (4.1) which delimits the first working nip (3) being a hard, heated roll, the diameter of which is greater than that of a hard, heated intermediate roll (5.2, 5.4) and the outer wall (9) of which forms one of two contact faces (9, 10) of a web treatment nip (8) which is arranged upstream of the first working nip (3), and the other contact face (10) being formed by a belt (14) which circulates on guide rolls (11, 12, 13).

Abstract: A calender (1) for calendering a paper web (2), in particular made from paper suitable for gravure printing, having at least one roll stack which in each case has an upper and a lower end roll (4.1, 4.2) and intermediate rolls (5.1, 5.2, 5.3, 5.4), one of the two end rolls (4.1) delimits a first working nip (3) of the roll stack depending on the guidance of the paper web (2), and the rolls (4.1, 4.2, 5.1, 5.2, 5.3, 5.4) are hard rolls (4.1, 5.2, 5.4) and soft rolls (5.1, 5.3, 4.2) in order to form loadable working nips in the form of soft nips, the end roll (4.1) which delimits the first working nip (3) being a hard, heated roll, the diameter of which is greater than that of a hard, heated intermediate roll (5.2, 5.4) and the outer wall (9) of which forms one of two contact faces (9, 10) of a web treatment nip (8) which is arranged upstream of the first working nip (3), and the other contact face (10) being formed by a belt (14) which circulates on guide rolls (11, 12, 13).

Abstract: Calender (1) for calendering a paper or board web (2), having at least one nip (3), which is formed between a heatable roll (4) and a mating element (5), a device (6) for producing a predetermined pressure in the nip (3), and a web treatment device (7) arranged upstream of the nip (3) and having two contact surfaces (9, 10) forming a treatment nip (8), one of which is a circulating contact surface (9) which is formed by a belt (14) circulating on guide rolls (11, 12, 13), the other contact surface (10) is formed by the circulating surface of the heatable roll (4), and the treatment nip (8) extends along an angle (15) of the wrap of the heatable roll (4), wherein, in order to increase the thermal efficiency of the transfer of heat, the circulating belt (14) uses a resilient surface to press the paper or board web (2) onto the heatable roll (4), and the guide rolls (11, 12, 13) control sectional forces of the circulating belt (14) in the treatment nip (8).

Abstract: The invention concerns a calender which comprises a vertical stack of interlinked rollers driven individually by regulated electric motors. The regulation process acts on the distribution of the delivered power to the individual rollers such that the forces acting on the rollers in the horizontal direction and measured in the roller bearings are minimized, so enabling slimmer rollers to be used.

Abstract: The invention concerns a calender which comprises a vertical stack of interlinked rollers driven individually by regulated electric motors. The regulation process acts on the distribution of the delivered power to the individual rollers such that the forces acting on the rollers in the horizontal direction and measured in the roller bearings are minimized, so enabling slimmer rollers to be used.

Abstract: A calender comprises a vertical stack of interlinked rollers driven individually by regulated electric motors. The regulation process acts on the distribution of the delivered power to the individual rollers such that the forces acting on the rollers in the horizontal direction and measured in the roller bearings are minimized allowing slimmer rollers to be used.

Abstract: A vertical calender arrangement comprises a controllable-deflection top roll, a controllable-deflection bottom roll and intermediate rolls arranged between top and bottom rolls. The top roll and the bottom roll are each provided with a power drive.

Abstract: The invention concerns a calender which comprises a vertical stack of interlinked rollers driven individually by regulated electric motors. The regulation process acts on the distribution of the delivered power to the individual rollers such that the forces acting on the rollers in the horizontal direction and measured in the roller bearings are minimized, so enabling slimmer rollers to be used.

Abstract: A controlled deflection roll having a rotatable roll shell which is penetrated by a stationary shaft, a hydraulic bearing arrangement between shaft and roll shell, which is formed by individual hydrostatic bearing elements arranged axially beside one another, which each comprise a radially movable force element having an outer bearing pocket element, the outer bearing pocket element having a cylindrical outer bearing surface supporting the cylindrical roll shell hydrostatically on an inner shell circumferential line, and having an edge bearing unit provided at each end of the roll shell, the outer bearing pocket element (9) in each case being mounted hydrostatically on a spherical inner bearing surface (13) running concentrically with respect to the inner circumferential line of the roll shell (2).

Abstract: A vertical calender arrangement comprises a controllable-deflection top roll, a controllable-deflection bottom roll and intermediate rolls arranged between top and bottom rolls. The top roll and the bottom roll are each provided with a power drive.

Abstract: Calender for the treatment of a paper web, which comprises at least one roll stack that can be loaded from the end, has a stack plane and comprises end rolls and at least one intermediate roll, which comprise hard and soft rolls for forming working nips between a hard and a soft roll in each case, and some of the rolls being heatable, the roll stack having at least one intermediate roll, on whose periphery, on one roll stack side, two rolls that can in each case be displaced with respect to the stack plane bifurcate the roll stack.

Abstract: The invention concerns a calender which comprises a vertical stack of interlinked rollers driven individually by regulated electric motors. The regulation process acts on the distribution of the delivered power to the individual rollers such that the forces acting on the rollers in the horizontal direction and measured in the roller bearings are minimized, so enabling slimmer rollers to be used.

Abstract: A calender for treating a paper web, having at least one roll stack capable of being loaded from the end and in each case comprising a top and bottom end roll and a plurality of intermediate rolls, which are jointly arranged in a roll stack plane, and the rolls including hard and soft rolls in order to form operating nips in the form of soft nips, wherein each soft roll which forms an intermediate roll has a greater diameter than a soft roll which forms an end roll.

Abstract: The invention concerns a calender which comprises a vertical stack of interlinked rollers driven individually by regulated electric motors. The regulation process acts on the distribution of the delivered power to the individual rollers such that the forces acting on the rollers in the horizontal direction and measured in the roller bearings are minimized, so enabling slimmer rollers to be used.

Abstract: A vertical calender arrangement comprises a controllable-deflection top roll, a controllable-deflection bottom roll and intermediate rolls arranged between top and bottom rolls. The top roll and the bottom roll are each provided with a power drive.

Abstract: A calender arrangement includes end rolls that are in the form of deflection controlled rolls having an internal stroke. One of the end rolls comprises at least one stop element that is in the form of a hydraulic positioned hydrostatic element which, together with the internal wall of the roll sleeve, defines a gap. When a constant throughput of hydraulic medium is fed in, an equilibrium of forces is produced, at which equilibrium the roll sleeve is positioned. The pressure built up in the process is a measure of the positioning forces. Small departures from the target position are permitted without control intervention.

Abstract: A calender for treating a paper web, having at least one roll stack capable of being loaded from the end and in each case comprising a top and bottom end roll and a plurality of intermediate rolls, which are jointly arranged in a roll stack plane, and the rolls including hard and soft rolls in order to form operating nips in the form of soft nips, wherein each soft roll which forms an intermediate roll has a greater diameter than a soft roll which forms an end roll.

Abstract: A calender arrangement includes end rolls that are in the form of deflection controlled rolls having an internal stroke. One of the end rolls comprises at least one stop element that is in the form of a hydraulic positioned hydrostatic element which, together with the internal wall of the roll sleeve, defines a gap. When a constant throughput of hydraulic medium is fed in, an equilibrium of forces is produced, at which equilibrium the roll sleeve is positioned. The pressure built up in the process is a measure of the positioning forces. Small departures from the target position are permitted without control intervention.

Abstract: The invention relates to a calender for treatment of a product web, having at least one roll stack comprising rolls arranged in a calender frame, the ends of which rolls are guided in roll mountings, which can be fastened to the calender frame by means of brackets, and having guiding means associated with the rolls for guiding a product web through nips formed between the individual rolls. For a rapid change-over with respect to the nature and intensity of the treatment of a product web in a calender, the brackets are in the form of modules, which support the rolls and are capable of being fastened individually to the calender frame and which have identical connecting devices for grouping, as desired, on the calender frame.