Abstract: A controlled deflection roll is disclosed comprising a stationary support and a rotatable hydraulically supported roll shell. There is also provided heating of the hydraulic liquid which is infed to the controlled deflection roll by a pump device. The pressure line of the pump device is connected by means of a heat exchanger with a return flow line. Connected after the heat exchanger is a cooling device having a temperature regulator. In the pressure line there is arranged following the heat exchanger a heating device. The return flow line is connected by means of an overflow valve with a container for hydraulic medium which is fed to a heating device for the controlled deflection roll.

Abstract: A heated controlled deflection roll equipped with spraying devices arranged in the intermediate space or compartment between the stationary roll support and the roll shell. The spraying devices have walls confronting the inner surface of the roll shell and at which walls there are formed openings which, during operation, form liquid jets. Oil which is infed to the spraying devices can be heated in a collecting container and/or in a tubular conduit. Temperature regulation of the roll shell can also be accomplished by a throughflow or quantitative regulation by means of valves. If there are present a number of temperature zones in the lengthwise direction of the roll shell then different spray devices can be operatively associated with partition walls, from which the liquid is infed to separate collecting containers. From these collecting containers the liquid is again infed, by means of separate pressure lines, to the individual spray devices.

Abstract: A controlled deflection roll comprising a stationary support and a substantially tubular-shaped roll shell rotatable about the stationary support. Hydrostatic pressure or contact elements are provided for the controlled deflection roll and are supported at the stationary support. A pump for infeeding hydraulic pressurized fluid medium, together with its drive motor, is secured at one end of the stationary support. The drive motor can be a rotational speed-regulated motor and is equipped with a regulator to which there is infed the measured signal of a pressure feeler or sensor arranged at the outlet side of the pump. Preferably, a plurality of pumps together with their motors can be attached at a substantially flat end surface or flat side surfaces of the stationary support.

Abstract: An apparatus for determining the pressure forces effective in a rolling mill having at least one controlled deflection roll and at least one counter roll, there being provided beams for simulating the stiffness or rigidity of the counter roll and the shell of the controlled deflection roll. These are further provided pressure elements which simulate the effect of the hydrostatic pressure or support elements of the controlled deflection roll, and measuring elements serve to measure the pressure between the beams. External pressure elements can serve to simulate the effect of external contact or pressure cylinders. With a rolling mill having a number of controlled deflection rolls and a number of solid counter rolls, the beams, the pressure elements and the measuring elements can be appropriately grouped or assembled together. The measuring elements deliver signals which can be employed for controlling or regulating a corresponding rolling mill which is simulated.

Abstract: For use in drawing, straightening or stretching a strip of metallic material such as bars, wire, and coils, an apparatus having a pair of elastic ring-equipped roll assemblies which provide a high tensioning force for the strip material held therebetween. As the tensioning force increases, the elastic ring in each of the roll assemblies tends to deform elastically along the circumferential direction of the area which contacts the material, thus increasing the contact area over which the applied force is evenly distributed. By this means the force per unit area can be reduced. The elastic ring is mounted on a control driving shaft by at least three axially rotatable rollers, two of which are arranged to bridge the area of the material contacted by the ring.

Abstract: This invention relates to an improvement in dehydrating equipment, in particular double belt presses, in which an upper endless sieve belt is guided by means of parallelly supported rollers, with parallelly supported rollers being similarly arranged below and on which a lower endless sieve belt is guided, the suspension to be dehydrated being introduced between the sieve belts, the sets of rollers being divided into a wedge section, a registering section, a precompression section and a main compression section, the improvement comprising that the compression rollers in the pre-compression section are composed of several pieces extending across the equipment and, when viewed in the direction of motion of the sieve belts, are alternatingly offset backwardly or forwardly, the ends of the rollers penetrating the region of adjacent rollers in overlapping fashion.

Abstract: A rolling device or roller mill containing controlled deflection rolls is provided with a support arrangement possessing side portions having cutouts intended to receive bearing blocks for the rolls and closed by detachable closure elements. The side elements can be formed, as by cutting, from sheet plate and are only minimumly machined.

Abstract: A loading arrangement for obtaining an equally distributed pressure load in a cylinder stack included in a printing unit of an offset printing press, comprising a plurality of cylinders each having a cylindrical body portion and stub shafts at both ends, journalled in bearings. The arrangement includes axially short load rollers for producing a pressure load to the outermost cylinders of the stack. The rollers are located to act on portions between the bearings of the cylinders, and hence, the pressure load is transmitted directly to the body portions of the outermost cylinders. This minimizes the deflection of the cylinders.

Abstract: A calender for processing pulverulent and doughy materials, composed of hydrostatic controlled deflection rolls. Each of the controlled deflection rolls comprises a roll shell rotatable about a stationary support member and hydrostatic support elements which can be activated by a pressurized fluid medium. The hydrostatic support elements of the rolls which coact at a pressure gap or nip, with the same elevational arrangement of such rolls, receive pressurized medium at the same pressure. If the rolls are located at an elevational difference then there is provided a differential pressure regulator for taking into account the effect of the inherent weight of the roll shells. The width over which the rolls can be impinged with the pressurized fluid medium can be adjusted, and equally the temperature of the pressurized fluid medium. The calender can be equipped with four rolls arranged in a substantially Z-shaped configuration.

Abstract: A roll, such as a filled calender roll of the type used in supercalenders of paper machines, includes an inner shaft and an outer shell which coaxially surrounds the inner shaft and is rotatable with respect thereto. A pair of deflection-compensating structures are provided to act between the shaft and the shell so as to urge the latter outwardly from the shaft at a pair of locations which are situated at different angular positions with respect to the common axis of the shell and shaft. The two deflection-compensating structures provide for compensation for the weight of the entire roll as well as for compensation for pressure acting on the roll at a nip which is defined in part by the roll.

Abstract: Apparatus for fixing toner image on a toner image supporting member in electrophotographic copying machine is disclosed. The fixing apparatus includes three rotary rollers which are in contact with each other under the action of pressing means. One of the three rollers has a smaller diameter than the other two rollers. Two rollers with which the toner image supporting member comes into contact are disposed in such a manner that the axes of the two rollers intersect each other and the portion at which the two rollers contact each other or are closest to each other forms a straight line relative to the direction of roller axis. According to one embodiment of the invention, the remaining one roller with which the supporting member does not contact, is formed as a crown roller, that is, a roller which has its largest diameter at the middle portion of the roller.

Abstract: Press having a stand in which two pressure rollers are mounted and form between them a press gap for the pressure treatment of a web of material; the stand is open on one side of the pressure rollers and at least one of the pressure rollers is a pressure equalization roller having mounted non-rotatably in the stand an axial bracket about which a roller shell is rotatable, which is braced against the bracket by hydrostatic supporting elements in a bracing plane determined by the axes of the pressure rollers.

Abstract: A pressure control device for processing machines having at least one roll which has a stationary core around which a hollow roll which forms the roll proper revolves with radial spacing from the core, the hollow roll supported at its ends on the core and supported on the core in between in the radial direction by a fluid pressure medium disposed in a chamber formed at the core, the fluid pressure medium generating a force acting on the inside of the hollow roll to provide the operating pressure of the roll, with a loading device operated by a fluid pressure medium also applied either to the roll or a counter-roll, either the loading device or roll forming a controlling element, with a control pressure which is derived from the pressure prevailing therein used to adjust a pressure in the other controlled element which has a definite predetermined pressure ratio to the pressure in the controlling element, which pressure control device includes a pressure ratio monitoring device having as inputs the control pre

Abstract: A pressure-roller apparatus comprising two compression rollers providing a pressure nip therebetween for the introduction of sheets or other thin members to be compressed and fed. The degree of pressure in the nip is variable by means of one or more adjustment roller assemblies comprising adjustment rollers which are substantially shorter in length than said compression rollers and which engage one of said compression rollers at one or more points intermediate its ends to provide an intermediate and balanced pressure adjustment which avoids bowing of said compression roller.

Abstract: Disclosed is an apparatus for controlling the caliper of a web, such as a continuous paper sheet issuing from a nip of a plural-roll device, such as a calender. One or more rolls of the device is subjected to a multiplicity of air jets issuing substantially at constant flow rates but at temperatures which may vary as desired from nozzles spaced lengthwise of the roll.

Abstract: A rolling device or roller mill having a controlled-deflection roll possessing a stationary roll support or carrier mounted in a frame of the rolling mill. A tubular roll shell is rotatable about the roll support and bears thereon by means of at least one bearing or support element. The roll shell is provided at its ends with guide members which are rotatably mounted in the roll shell and which are guided on the roll support in the direction of the pressing or disengaging movement of the roll shell. The controlled-deflection roll is equipped with a scraper device having a scraper blade which, during operation, is in contact with the outer surface of the roll shell, the scraper device being rotatably mounted on the frame. At least one of the guide members has a disengaging or lift-off element which, when the roll shell performs a disengaging or lift-off movement from the operative position, abuts a part of the blade support or carrier and raises the blade off the surface of the roll shell.

Abstract: A controlled deflection roll comprising a fixed support and a hollow shell rotatable about the support and displaceable relative to the support in the direction of a pressure plane. Between the support and the shell there is located at least one hydrostatic pressure or contact element which is effective in the pressure plane and serves for oppressing the roll shell against a counter roll and thus for forming the pressure force of the roll. Additionally, there is provided at least one hydrostatic lift-off element which is effective in the opposite direction with respect to the contact or pressure element and serves for lifting-off the roll shell from the counter roll. The contact element and the lift-off element can be connected by hydraulic lines or conduits to a source of hydraulic pressurized fluid medium.

Abstract: A controlled-deflection roll having a stationary roll support or carrier and a tubular roll shell rotatable about the stationary roll support. The tubular roll shell bears upon the roll support or carrier through the intermediary of at least one bearing or support element. The roll shell is provided at its ends with guide members which are rotatably mounted in the roll shell and which are guided on the roll support in the direction of the pressing or contact movement or the disengaging or lift-off movement of the roll shell. The controlled-deflection roll is provided with a scraper device equipped with a scraper blade which, during operation, is in contact with the surface of the roll shell, and the scraper device is secured to the guide members.

Abstract: Rolls of a rolling mill have hydraulic pressure exerted on the exterior surfaces thereof by hydrostatic pressure devices which produce hydraulic pressure in the gaps between bearing surfaces of the devices and the roll, and a flow of the hydraulic fluid in the gaps to cool the rolls. The pressure may be applied to press the rolls together, and also to provide lateral support. Different pressures may be applied to devices spaced parallel to the roll axis. Quadrilateral and overlapping rhomboidal bearing surfaces may be employed. A pair of small diameter working rolls may be pressed together by larger diameter pressure rolls and lateral support provided for the working rolls.

Abstract: An apparatus for controlling a deflection compensating press roll of a rolling mill having a pair of press rolls at least one of which is a deflection compensating roll having a support core, a roll shell rotatably mounted about the core, bearing means disposed between the core and the roll shell adjacent the shell ends, a plurality of support devices engaged between the core and the roll shell to exert forces therebetween and pressure means for pressing the rolls against each other, the control apparatus comprises a frame, a movable member mounted in the frame, means coupled with the support devices and the pressure means and responsive to the forces exerted thereby for exerting a force on the movable member which simulates the forces exerted by the support devices and the pressure means so that the movable member is maintained in an equilibrium position when the forces exerted by the support devices and the pressure means are substantially in equilibrium, means for sensing displacement of the movable member

Abstract: A calender press with improved uniformity of nip pressure comprising a conventional axially located and relatively rigid roll co-operating with a hollow and relatively compliant roll, and means to support the compliant roll along its length and urge it into contact with the rigid roll.

Abstract: To prevent center sag, or bowing of printing cylinders, and thus uneven printing throughout the axial length thereof, extension struts are connected to stub shafts at the ends of the cylinders, the struts being connected together to form a closed, rectangular or square frame in which the individual lengths of the struts are adjustable to thereby provide individually adjusted forces to the ends of the stub shafts and counteract sag or bow of the cylinders.