Abstract: Deflection controlled roll that includes a rotating roll jacket, a rotationally fixed yoke arranged to axially pass through the roll jacket, and a plurality of hydrostatic support elements arranged in series on the yoke in the direction of a roll axis which are chargeable with a pressure fluid to exert a supporting force on an inner side of the roll jacket. The plurality of hydrostatic support elements include hydrostatic pockets and at least one restrictor or capillary structured and arranged to supply pressure fluid to each of the hydrostatic pockets. A volume flow of at least some of the pressure fluid supplied to a respective hydrostatic pocket is variable depending upon a pressure on its respective hydrostatic support element.

Abstract: Deflection controlled roll that includes a rotating roll jacket, a rotationally fixed yoke arranged to axially pass through the roll jacket, and a plurality of hydrostatic support elements arranged on the yoke in a direction of a roll axis which are chargeable with a pressure fluid to exert a supporting force on an inner side of the roll jacket. A device for influencing a roll temperature via at least one fluid flow, which is separate from the pressure fluid is also included. The support elements are arranged into a plurality of controllable roll zones arranged along the roll axis. The temperature influencing device is structured and arranged to locally charge respective roll zones depending upon a pressure on the support elements in a respective roll zone.

Abstract: Deflection compensation roll and process for reducing vibrations in deflection roll. The roll includes antifriction bearings, a roll jacket supported in an area of its axial ends on the antifriction bearings, and hydraulic supports arranged to hydraulically support the roll jacket parallel to a working plane. A damping device, positioned next to each antifriction bearing, is structured and arranged to act essentially perpendicular to the working plane.

Abstract: Sag (deflection) compensation roll and process for operating sag compensation roll. The sag compensation roll includes a rotatable roll jacket, a non-rotating carrier being located inside the roll jacket, and a hydraulic support element arrangement being located between the carrier and the roll jacket. A bearing ring is located at each end of the roll jacket, the bearing rings are movable relative to the carrier in a press plane, and a bearing arrangement is located between the bearing rings and the roll jacket. The bearing arrangement includes at least three support elements distributed in a circumferential direction. At least one of the at least three support elements is movable with respect to the bearing ring. The process includes supplying the bearing pockets with a constant volume flow of hydraulic fluid, and driving at least one support element into the bearing ring under load up to the fixed position.

Abstract: Soft roll that may include a roll tube having an outside surface and a sealed interior space, and an elastic coating provided on the outside surface. The sealed interior space may include a vaporizable liquid and a heat exchanger for cooling heat generated in the roll during use. The sealed interior space may be gas-tight and the temperature of the heat exchanger may be set to condense vaporized liquid.

Abstract: Deflection controlled roll that includes a rotatable roll jacket, a rotationally fixed carrier arranged within the roll jacket, and a hydraulic support element arrangement positioned between the carrier and the roll jacket. A closed bearing ring is located in an end region of the roll jacket and is movable relative to the carrier in a press plane, and a bearing arrangement is positioned between the bearing ring and the roll jacket. The bearing arrangement includes at least two hydrostatic support elements which are mutually spaced in a peripheral direction and at least one of the at least two hydrostatic support elements is movable relative to the carrier. At least one force generating device is positioned between the carrier and the roll jacket and is arranged to act generally radially in the press plane.

Abstract: Deflection adjustment roll and process for supporting a roll jacket on a crosspiece of the deflection compensation roll. The deflection compensation roll includes a crosspiece, roller bearings composed of radial bearings and at least one hydrostatic bearing arrangement, and a roll jacket, which is rotatably supported on the crosspiece by the roller bearings. The at least one hydrostatic bearing arrangement acts in the axial direction. The process includes positioning radial roller bearings each bearing end of the deflection compensation roll and between the crosspiece and the roll jacket, wherein the radial roller bearings absorb radial forces, and positioning at least one hydrostatic bearing arrangement between the crosspiece and the roll jacket, wherein the at least one hydrostatic bearing arrangement absorbs axial forces.

Abstract: Deflection adjustment roll and process for supporting a roll jacket on a crosspiece of the deflection compensation roll. The deflection compensation roll includes a crosspiece, roll bearings composed of radial bearings and at least one hydrostatic bearing arrangement, and a roll jacket, which is rotatably supported on the crosspiece by the roll bearings. The at least one hydrostatic bearing arrangement acts in the axial direction. The process includes positioning radial roll bearings each bearing end of the deflection compensation roll and between the crosspiece and the roll jacket, wherein the radial roll bearings absorb radial forces, and positioning at least one hydrostatic bearing arrangement between the crosspiece and the roll jacket, wherein the at least one hydrostatic bearing arrangement absorbs axial forces.

Abstract: A process for operating a calender roll that cooperates rotatingly with at least one other calender roll of a roll stack, at least one calender roll of the roll stack being provided with an elastic cover. The process includes operating the calender roll; and changing a mass of the calender roll during operation. Furthermore, a calender roll is provided including a roll jacket having a first and second end; a supply connection arrangement; and a mass changing device connected to the supply connection.

Abstract: Deflection compensating roll and method of use thereof. The deflection compensating roll comprises a carrier that is nonrotatably held by an outer bearing and is disposed within a roll shell. The invention also includes a plurality of hydrostatic support devices arranged about the outer surface of the carrier and support the roll shell. Also included is a hydraulic piston/cylinder unit having an actuating element, the outer bearing supported on the actuating element, the actuating element forcing the outer bearing toward a mating roll. A bearing surface intermediate the outer bearing and the actuating element is present, and at least one pocket located opposite the bearing surface and having a surrounding rim is also present. The pocket is connected by a restrictor to a pocket pressurized fluid source, and a gap is present intermediate the bearing surface and the rim, the pocket being further connected by a gap to an outlet.

Abstract: Roll for a paper calender. The roll includes a core having opposed end faces and a barrel intermediate the opposed end faces, the barrel having a barrel region. Also included is an elastic cover extending over a working width of the core and a plurality of roller pins, each roller pin engaging a respective end face and having a pin region. Also provided is a temperature control device adapted to supply heat to and/or dissipate heat from the pin regions to a first temperature, and further adapted supply heat to and/or dissipate heat from the barrel region to a second temperature, wherein the first and the second temperatures are different. The present invention also provides a calender that employs such a roll having an elastic cover. Additionally provided is a process for operating such a roll having an elastic cover.

Abstract: Pressure processing roll with a roll jacket, the roll jacket rotatably mounted on a carrier by a bearing arrangement. The bearing arrangement has at least one hydrostatically supported bearing surface, which forms a gap with an opposing surface. A normal to the hydrostatically supported bearing surface, and therefore a normal force, has at least one axially oriented component. The bearing arrangement is acted upon by a predefined axially oriented force which substantially completely closes the gap in the absence of hydrostatic pressure in the hydrostatically supported bearing.

Abstract: A method and device for a paper calender that includes at least one first roll, an elastic cover comprised of plastic, and at least one heatable roll. The at least one heatable roll is heatable by means of a heating device. The at least one heatable roll supports the elastic cover. In addition, the at least one first roll can likewise be made to be heatable so that the paper web can be supplied with heat from both sides.

Abstract: A roll arrangement that includes a roll with a hollow space arrangement and a heating device that acts on the exterior of the roll. A vaporizable fluid and a heat exchanger are positioned in the hollow space arrangement of the roll to cool the roll more rapidly after the heating device has been shut down and, thus, facilitate handling the roll. A method for cooling a roll for use in a machine for producing a fibrous material web. The roll has been heated on an exterior by an exterior heat source by and includes a hollow space that is at least partially filled with a vaporizable fluid. The roll is, moreover, coupled with a heat exchanger. The method includes vaporizing the vaporizable fluid in the hollow space, condensing the vapor on the heat exchanger by a coolant flow through the heat exchanger, and rotating the heat exchanger within the hollow space to fling the condensed liquid within the hollow space.

Abstract: Roll machine and process for forming a roll machine. The roll machine includes a roll having a roll body and an elastic layer located on a periphery of the roll body, and a mating roll. At least one roll nip is formed between the roll and the mating roll, and the elastic layer has a radial thickness less than approximately 8 mm. The process includes covering the roll body with an elastic layer having a radial thickness less than approximately 8 mm and pressing the roll and the mating roll together to form a press nip.

Abstract: A calender for a sheet material, e.g., paper, having at least two treatment stations through which the sheet material passes in succession. To regulate a desired parameter of the sheet material, each treatment station may include a plurality of adjacently arranged adjustment zones positioned in a row extending across a width of the sheet material. The adjustment zones of one of the treatment stations are positioned to be offset relative to the adjustment zones of the other treatment station by a fraction of a width of the adjustment zones, e.g., one-half the width. The particular arrangement enabling improved correction potential without increasing structural expenditure.

Abstract: An adjustable deflection roll including a roll sleeve or jacket supported by a plurality of support devices positioned partially within a support beam. Pressure chambers may be located between the support devices and the support beam and each pressure chamber may be coupled to a supply line. As the length of the roll increases, and as the need for increasingly more precise pressure distributions also increases, more support devices may be utilized. The adjustable deflection roll may also include a drain channel to facilitate quick relief of the pressure chambers when necessary. To accomplish this, each pressure chamber may be coupled to the drain channel furnished with the supply line such that the drain channel may be closed with a drain valve.

Abstract: A deflection controllable roller has as an on-off valve disposed in each of a plurality of discharge lines. The on-off valve opens only toward the discharge side. The discharge side of the on-off valve is alternately pressurized with an opening pressure that is less than an internal chamber pressure or with a cut-off pressure that is greater than the internal chamber pressure. The on-off valves are located directly in the bearing device and are, therefore, relatively easily controlled.

Abstract: A calender for treating both sides of a paper web includes hard rollers and soft rollers. Working nips are formed between the juncture of each hard roller and soft roller. The roller stack can be loaded from one end, and preferably includes six to eight rollers. A changeover nip is formed by the juncture of two soft rollers or at the transition between two stacks. When using two stacks, each stack preferably has three to five rollers. At least one working nip has a dwell time of at least 0.1 ms. A heatable roller adjacent to the working nip is heated to a surface temperature of at least 100.degree. C. The roller stack is loaded such that an average compressive stress in the working nip is greater than or equal to 42 N/mm.sup.2.

Abstract: A calender roller for treating paper includes at least one roller having flanges disposed at both axial ends of the roller. Each of the flanges is formed in conjunction with a bearing journal. An exterior axial surface of the flanges include a plurality of axially projecting deflection bodies. A jacket includes a thin-walled tube and a layer of fiber-reinforced plastic, which covers the exterior surface of the flanges and a circumference of the tube. The fiber-reinforced plastic has fiber rovings which are wound onto the circumference of the tube and which, as a result of being deflected by the deflection bodies, also extend across the exterior axial surfaces of the flanges.