Abstract: Multiple groups of sensors are circumferentially spaced apart at each cross-directional position along a sensing roll of a nip press to measure and cancel or nearly cancel the effects of rotational variability which may be acting on the sensing roll. The strategically-placed sensors are designed to measure the pressure being placed against the web that is being advanced through the nip press. The average of the measurements of multiple sensors spaced circumferential apart provides a good cancellation of any rotational variability that might be found at a cross-directional position on the sensing roll. In this manner, a more true measurement of the nip pressure profile can be obtained and better adjustments made to reduce nip pressure profile variability. In addition, the nip variability profile may be used as a predictor of cover or bearing failures, resonant frequencies and other roll anomalies.

Abstract: A device for relieving pressure in hydraulic lines, in particular in connecting lines that have coupling points (6, 8), are located between attachments and include hydraulically actuated actuators and working implements supplying the attachments. A control block (2) is connected to the line to be relieved and includes an openable non-return valve (12) as a relief valve. A pressure accumulator (22) holds a relieving volume when the non-return valve is open. An actuating member (38) can be moved manually to open the non-return valve (12) and is arranged to be movable on the housing (24) of the pressure accumulator (22).

Abstract: A peristaltic pump dampener apparatus includes a first chamber and a second chamber separated by a flexible diaphragm. The first chamber of the peristaltic pulse dampener apparatus receives a first input flow tangent to the walls of the first chamber, and the second chamber of the peristaltic pulse dampener apparatus receives a second input flow tangent to the walls of the second chamber. The flexible diaphragm of the peristaltic pulse dampener apparatus acts to equalize the pressure between the first chamber and the second chamber so as to generate two substantially even, constant output flows.

Abstract: An absorber for use in a fluid delivery system is disclosed which includes a housing defining an interior chamber, a connective fitting extending from the housing in fluid communication with the interior chamber for connecting the housing to the fluid delivery system, and at least one gas-filled bladder or cell disposed within the interior chamber of the housing to accommodate changes in fluid characteristics, such as, for example, pressure and volume, within the fluid delivery system, the gas-filled bladder or cell having a predetermined pre-charge pressure and a multi-layered flexible polymeric shell including a plurality of successive relatively thin polymeric shell layers to inhibit the formation of leak paths through the shell in the event that a single shell layer fails.

Abstract: Disclosed is an absorber system for absorbing pressure shocks and fluid volume shocks in a fluid system. In particular, the absorber system includes a housing with a joint for insertion within a fluid system, wherein the housing interior is in fluid communication with fluid in the fluid system. As such, when a pressure and/or fluid volume shock is developed within the fluid system, fluid is forced into the housing via the joint. A membrane is disposed within the housing in such a way that the fluid impacts the membrane which, in response, flexes to absorb and control the pressure and/or fluid volume shock within the fluid system. The absorber system, thus, controls pressure and/or fluid volume shock within a system and can prevent water hammer and other problems which can result from the development of pressure and/or fluid volume shock.

Abstract: Method and apparatus for dehydration of veneer sheet having therein a knot are disclosed. Veneer dehydration apparatus includes a first stationary single dehydrating roller and a plurality of second movable sectional dehydrating rollers, which rollers are disposed one above the other so that a nip through which a veneer sheet for dehydration is moved is formed between the first and second rollers. A stop device determines the initial position of each second roller relative to the first roller where a predetermined spaced distance is formed between the first and the second rollers. An urging device yieldably urges each second roller to the initial position. The second roller is movable away from the initial position against the urging force of the urging device independently of the other second rollers by a knot present in the veneer sheet and just moving through the nip between the second roller and the first roller.

Abstract: A roll press for the compression or compacting of granular products. Two detachable rolls separated by a roll gap are driven in opposite directions and mounted on shafts to rotate in a machine frame. The shafts of the mobile rolls are received in bearing housings arranged in a mobile manner in the machine frame. Two respective bearing housings of different rolls, arranged on one side of the rolls, are interconnected by at least one pressure cylinder having at least two working chambers. A method for centering mobile rolls in such a roll press. The at least two working chambers have a force effect acting in opposite directions, and are interconnected in such a way that a pressure medium can circulate between the chambers. In this way, the hydraulic system is positioned in a fixed manner on the machine frame, the rolls nonetheless being mounted in the machine frame in a floating manner.

Abstract: A leveling machine for rolled-up tablets has a base, a mounting frame and a wheel-leveling device. The base has two sideboards faced each other and each sideboard has a spindle hole. The mounting frame is rotatably mounted in the base between the sideboards and has a spindle, an adjusting motor, two mounting boards and a bottom cylinder. The spindle is rotatably mounted in the spindle holes of the sideboards. The adjusting motor is mounted securely on the corresponding sideboard to drive the spindle. The mounting boards are respectively, obliquely and securely mounted around the spindle near the sideboards. The bottom cylinder is rotatably mounted around the spindle between the mounting boards. The wheel-leveling device is connected to the mounting frame and has two top cylinder mounts, a cylinder, a top cylinder, two pushing mounts and two telescopic drivers.

Abstract: A roller press for the pressure treatment or compaction of granular material, having at least two rolls formed as freely rotating rolls, in each case rotatably mounted in a machine frame by a shaft, driven in opposite directions and separated from one another by a roll gap. The shafts of the rolls are accommodated in bearing housings movably mounted in the machine frame and in each case two bearing housings arranged on one side of the rolls and belonging to different rolls are connected to each other via at least one pressure cylinder. The connection between the bearing housings in each case has at least one torque balance. In this way, the structure of a roller press having roller centering is simplified and can be produced more cost-effectively.

Abstract: An auxiliary device for harvesting pasture prevents clogging at a roll baler to increase speed of harvesting pasture and decrease occurrence of troubles and enhance density of roll package. The auxiliary device for harvesting pasture includes tires having a predetermined width and weight as a rolling body, a holding portion to rotatably hold the tires, and an attaching portion to attach the holding portion to the front of a tractor which tows a roll baler. In the constitution of the auxiliary device for harvesting pasture, the attaching portion is attached to the front portion of the tractor and a line of collected grass is subject to rolling pressure by rolling of tires in accordance with movement of the tractor. Instead of the tires, a cylindrical body or a columnar body, or either one which is made in the form of metal cylindrical body or columnar body can be mounted.

Abstract: The aim of the invention is to simplify and to improve mounting of roller bearings in double roller machines, for example, roller presses for interparticle comminution of granular goods. The rollers and the bearing housing thereof are formed by means of slanting rollers and/or thermal roller longitudinal changes. The rollers are guided in a secure manner on the slide guides thereof. The invention is characterized in that the fixed bearing housing and the moveable bearing housing are connected together via a guide rod in each roller.

Abstract: A through-air dryer is disclosed. The through-air dryer includes a cylindrical deck made from a plurality of deck plates that support a throughdrying fabric. The deck plates are supported by opposing hubs. Each of the hubs is in communication with a bearing that is mounted to a stationary shaft for allowing the cylindrical deck and the hubs to rotate. The bearings are positioned so as to create a through-air dryer structure that remains stable during operation and allows for easy calculation of loads on the dryer.

Abstract: A regulating unit for accomplishing a linear movement includes a cylindrical frame part (1) having a cylinder part (11) and cylinder head (12), which define a piston space (131, 132), and a piston unit (2) to be moved by a pressurized medium in the piston space. The height of a first space (131), in which a piston part (22) is moveable, is bigger than the height of a piston part, the cross section area is bigger than a cross section area of a piston rod. A cross section area of a second space (132) is smaller that the cross section area of the piston part. Pressurized medium may be fed into a cavity space (15), which is between the facing surfaces of the piston part and the piston space, for moving the piston unit towards the cylinder head (12) or vice versa.

Abstract: The invention relates to a casting roller (1), for a double-roller continuous casting machine, in particular for the casting of a steel strip, comprising a cylinder sleeve (2) which may rotate about a fixed axle (5). Intermediate rings (7b, 7c, 7d) rotating with the cylinder sleeve (2) are arranged between the cylinder sleeve (2) and the axle (5), which are provided with radial pressure means (9), acting on the cylinder sleeve (2). The above comprise a pressure chamber (10), pressurized with a fluid pressure medium and acting on a pressure ring (24) fixed to the inner wall of the cylinder sleeve (2), which may be deformed in the radial direction by inductive heating or radiated heat. The external profile of the casting roller (1) may be globally altered or local fine adjustments made by pressurizing the pressure chamber (10) with the pressure medium, or by heating the pressure ring (24).

Abstract: A regulating unit for accomplishing a linear movement includes a cylindrical frame part (1) having a cylinder part (11) and cylinder head (12), which define a piston space (131, 132), and a piston unit (2) to be moved by a pressurized medium in the piston space. The height of a first space (131), in which a piston part (22) is moveable, is bigger than the height of a piston part, the cross section area is bigger than a cross section area of a piston rod. A cross section area of a second space (132) is smaller that the cross section area of the piston part. Pressurized medium may be fed into a cavity space (15), which is between the facing surfaces of the piston part and the piston space, for moving the piston unit towards the cylinder head (12) or vice versa.

Abstract: A relief cylinder structure for guiding a roll in a multinip calender has a frame and an arm that is arranged to move linearly in relation to the frame. A quick-opening cylinder is placed inside the arm. In a fault situation, the relief cylinder causes the cylinder rolls to move rapidly further away from each other. An auxiliary coupling (8) opens in a fault situation, wherein the pressure produced in the quick-opening cylinder (6) is discharged to a hydraulic system in a substantially non-pressurized state. The pressure of the quick-opening cylinder (6) is thus reduced below the pressure of the main cylinder (4), wherein the auxiliary piston (7) moves towards the end of the arm (3). Because the volume of the main cylinder (4) grows in accordance with the cylindrical space formed inside the arm (3), the volume restricted by the frame (2) of the relief cylinder (1) is reduced.

Abstract: A cordless blind includes a headrail, a bottom rail suspended from the headrail by a first cord and a second cord, a wall covering disposed between the headrail and the bottom rail, and a drive actuator. The drive actuator includes a spring motor, a spool coupled to the spring motor, a first tensioning mechanism, and a second tensioning mechanism. The first and second tensioning mechanisms are configured to impact a resistant force on movement of the first and second cords. The drive actuator may include a spool, a spring motor, a biasing element configured to provide a force biased against movement of the bottom rail, and a bias relief mechanism that is configured to provide for selective application and relief of the biasing force by the biasing element.

Abstract: A refrigerant gas is collected and a compressor is removed from a discarded refrigerator, a heat-insulating housing including a heat insulator is cut/processed and separated into a plurality of pieces, and the pieces are compressed/processed by compression rollers opposing each other so as to collect a gas contained in the heat insulator. In accordance with this method, substantially no gas contained in the heat insulator is diffused at the time of cutting the heat-insulating housing, and the gas can be collected at a high concentration because it is collected by being allowed to leak out at the time of compressing. Furthermore, by using the compression rollers, closed-cells in the heat insulator can be crushed easily, thereby collecting the gas completely and reliably. Thus, it is possible to collect a foaming gas contained in the heat insulator efficiently and disassemble a refrigerator at low cost without increasing the size of equipment and an installation space.

Abstract: To present invention relates to a calender for calendering a moving web of paper or board, the calender comprising a top roll (1) and a bottom roll (1) and a bottom roll (2), both of the rolls being of the variable-crown type, at least one intermediate roll (3) of an intermediate roll stack adapted between the top roll (1) and the bottom roll (2) in a disposition allowing the superimposed rolls (1, 2, 3) of the stack to be brought into a nip contact with each other during calendering, and support means (4, 5) for mounting the rolls (1, 2, 3) to the frame (6) of the calender or, alternatively, to guides (7) mounted on the frame (6). Actuator means (9, 19) are adapted between the mounts (5) of the superimposed rolls (1, 2, 3) forming the nips and/or between the bearing blocks (4) of the rolls so as to accomplish the relief of nip loading imposed by the weight of the intermediate rolls (3) and the auxiliary means connected thereto.

Abstract: A vibration-minimizing suspension mechanism for a press roll is provided. The press roll and an opposing roll each having a rotational axis and cooperate to form a press nip for imparting a linear load on a web passing therethrough. The linear load is oriented through the rotational axes of the press and opposing rolls. The suspension mechanism comprises a suspension arm having opposed ends and a medially-disposed pivot, wherein the rotational axis of the press roll is rotatably engaged with one of the opposed ends. The suspension arm is pivotably and adjustably mounted at the pivot to allow the pivot to be adjusted in substantially parallel relation to the linear load. The adjustable pivot thereby allowing a mounting line, defined by the pivot and the rotational axis of the press roll, to be maintained in substantially perpendicular orientation to the linear load to thereby minimize vibration in the press roll.

Abstract: A vibration-minimizing suspension mechanism for a press roll is provided. The press roll and an opposing roll each having a rotational axis and cooperate to form a press nip adapted to impart a linear load on a fiber web passing therethrough. The linear load is oriented through the rotational axes of the press roll and the opposing roll. As such, the suspension mechanism comprises a suspension arm having opposed ends and a medially-disposed pivot, wherein the press roll is rotatably engaged at the rotational axis thereof with one of the opposed ends of the suspension arm. The suspension arm is further pivotably and adjustably mounted at the pivot so as to allow the pivot to be adjusted in substantially parallel relation to the linear load.

Abstract: Calender and process of calendering a web in calender. The calender includes a frame, an upper roll, a lower roll, an intermediate roll arrangement that includes an intermediate roll that is fixed in the frame, and a load limiting device coupled to the intermediate roll. The process includes loading the intermediate roll in two directions in a pressing plane direction via the upper and lower rolls, monitoring pressures exerted in the two directions on the intermediate roll in the pressing plane direction, and releasing the load on the intermediate roll when a difference between the pressures exerted in the two directions on the intermediate roll is greater than a predefined amount.

Abstract: The invention concerns a method and a device for changing the natural frequency of a nip roll construction in a paper or board machine so that the rigidity of one or several loading elements, for example loading cylinder or loading beam, in the nip roll construction is varied. The loading cylinder with adjustable rigidity in accordance with the invention comprises a cylinder (11), into which two pistons (12, 13) have been fitted. The pistons (12, 13) have been attached each of them to a piston rod (14, 15) of its own, which piston rods have been passed through the end walls (11a, 11b) of the cylinder (11). Thus, in the cylinder (11), between the pistons (12, 13), a work pressure space (16) is formed, and at the opposite sides of the pistons (12, 13) counter-pressure spaces (18, 20) are formed.

Abstract: In a roll nip (5) formed between a shoe press roll (1) having a concave, plane or slightly convex press shoe (11), a flexible jacket (15) and a hot counter roll (3), the jacket (15) may be damaged by the heat from the counter roll (3) upon a web break. To avoid this, the roll nip (5) is opened by removing one of the press shoe (11) and the hot counter roll (3) from the other, so that the jacket (15) resumes a generally cylindrical shape having an arched portion located across the shoe (11). Then, a force is applied inside the roll jacket (15), directed away from the roll nip (5), to tension the roll jacket (15) over the leading edge and the trailing edge of the press shoe (11), so as to reduce the height of arch of the arched portion over the shoe (11) sufficiently to ensure removal of the jacket (15) from contact with the hot counter roll (3). Preferably, the force against the inside of the jacket is applied by means of a tensioning shoe (61).

Abstract: A method for changing the natural frequency of a nip roll construction in a paper or board machine. In the method, the bearing elasticity of a hydrostatic bearing element (10, 20, 30, 40) of at least one roll (1) in the nip roll construction is changed, in which connect the natural frequency of the roll (1) is also changed. The device that carries out the method comprises a pressure medium accumulator (39), which has been connected to the pressure side of a loading element (13, 23, 33) of at least one hydrostatic bearing element (10, 20, 30).

Abstract: A die apparatus for supporting and retaining rotary dies in operation having a base, a cover supported by a plurality of columns, a cross member moveable along the columns and modular die supports rollingly engaged with the rotary dies. A method of installing and removing the rotary dies from the apparatus includes moving the dies along a first axis of movement within the apparatus through use of a support strap and moving the dies to and from the apparatus through use of a conveyor.

Abstract: A press assembly for use in a paper-making machine includes a roll, a first air press backing assembly and a second air press backing assembly. The first air press backing assembly and the second air press backing assembly each include an inner wall, an outer support structure and a plurality of inflatable hoses interposed between the inner wall and the outer support structure. The inner wall is positioned adjacent to and defines an air chamber with the roll.

Abstract: In a method and an apparatus for disposing of thin, flexible material, which is in the form of a material web moved in the web direction and supplied to the disposal apparatus, a front web section at the front in the movement direction is held fast in areal manner by first holding means and a second web section spaced behind the same is held fast in areal manner by second holding means. The web material is separated by a separating device in an exposed and optionally taut intermediate section located between the retained web sections. Even tear-sensitive material can be reliably held by the flat-engaging holding means. The separation of web material held on both sides under the action of a knife or the like can take place in troublefree manner, particularly without drawing in the material. The apparatus can be used with particular advantage for the continuous disposal of used stamping film in hot stamping devices.

Abstract: In a method and apparatus for damping contact oscillations of rotating rolls in a paper machine, but notably in a coater, the rolls are held endways in bearings. At least two rolls form a nip with each other. The damping is carried out actively and the active stimulation (phase-shifted counteroscillation) acts from outside directly and/or indirectly on at least one bearing point of one of the rolls.

Abstract: Calender that includes a stand, an upper roll, a lower roll, and at least two center rolls arranged between the upper and the lower rolls. The calender also includes at least two cylinders, where the at least two center rolls are supported on the stand by the at least two cylinders. Each of the at least two cylinders include a discharge path that is controlled over more than ¾ of a piston stroke for lowering the at least two center rolls.

Abstract: The invention relates to a method for operating a calender, comprising a cylindrical heated roll and a flexible belt surrounding a stationary support beam which supports at least one actuator which may urge a concave load shoe against the heated roll by means of said flexible belt to form an extended and heated nip through which a fiber web passes to be calendered and a separating mechanism for having at least one of the rolls movable into and away from the nip characterized in that said flexible belt is a flexible tubular jacket which forms a part of an enclosed shoe roll such that the ends of said jacket have end walls mounted thereto, which end walls are rotatably mounted in relation to said support beam, and in that at least one of said end walls is driven by means of a drive arrangement which drive arrangement may be activated to drive the end walls and thereby also the jacket independently of its position in relation to the fiber web or the heated roll.

Abstract: A method for safeguarding against the entry of foreign bodies into a nip between two cylinders, which includes applying a deflection movement to one of the cylinders counter to a spring force applied thereto so as to overcome the spring force and, in accordance with a prescribed deflection distance, alternatively keeping the spring force to be overcome constant or reducing the spring force; and a device for performing the method.

Abstract: A material web is processed in a contact zone between a stationary roller and a driven working roller. The working roller diameter is smaller than the diameter of the stationary roller. The working roller is displaceable in all directions transverse to the length of the movement of the web. The working roller is pressed against the stationary roller by a presser that presses on a peripheral area of the working roller opposite the contact zone. The pressing operation is continuous over the working width of the working roller and the material web is permitted to pass through the contact zone between the working roller and the stationary roller.

Abstract: An apparatus for joining dough blocks to form a continuous dough sheet. The dough blocks are cut from a dough mass and drop into a space between first and second groups of rollers. The first and second groups of rollers include horizontally-paired rollers arranged in tiers and forming a substantially V-shaped space for receiving the dough blocks, with the uppermost pair of rollers being separated by a first horizontal gap which is wider than a second horizontal gap separating the lowermost pair of rollers. The first group of rollers are rotated in a direction (e.g., clockwise) which is opposite to that of the second group of rollers. In addition, the first group of rollers is alternately moved toward and away from the second group of rollers, thereby applying vibrations to the dough blocks.

Abstract: The invention relates to a method for operating a calender, comprising a cylindrical heated roll and a flexible belt surrounding a stationary support beam which supports at least one actuator which may urge a concave load shoe against the heated roll by means of said flexible belt to form an extended and heated nip through which a fiber web passes to be calendered and a separating mechanism for having at least one of the rolls movable into and away from the nip characterized in that said flexible belt is a flexible tubular jacket which forms a part of an enclosed shoe roll such that the ends of said jacket have end walls mounted thereto, which end walls are rotatably mounted in relation to said support beam, and in that at least one of said end walls is driven by means of a drive arrangement which drive arrangement may be activated to drive the end walls in and thereby also the jacket independently of its position in relation to the fiber web or the heated roll.

Abstract: The invention relates to a method and an apparatus calendering a fiber web, wherein the fiber web passes through an extended and heated nip, said nip being formed on one side by a cylindrical heated roll and on the other side by a flexible tubular jacket which is pressed against the heated roll by means of a concave load shoe, said tubular jacket surrounding a stationary support beam which supports at least one actuator which may urge said load shoe and said flexible tubular jacket against said heated roll, and wherein the extension of the load shoe in the axial extension is less than the axial extension of the jacket and the heated roll such that when the load shoe is urged against the heated roll there will be formed tapered sections at each side end of the jacket within the nip characterised in that said tapered section are substantially covered by said fiber web such that a small strips of the fiber web at each edge is not calendered in said extended nip.

Abstract: In a method and apparatus for damping contact oscillations of rotating rolls in a paper machine, but notably in a coater, the rolls being held endways in bearings and at least two rolls forming with each other a nip, the damping is carried out actively, the active stimulation (phase-shifted counteroscillation) acting from outside directly and/or indirectly on at least one bearing point of one of the rolls.

Abstract: An apparatus for processing web-shaped material (90) comprises a working roller (5), a counter support (6), a pressure bearing structure (3) for exerting driving force to said working roller (5), a supporting carrier (1) and a pressing device which comprises a pressure hose arranged between the pressure bearing structure (3) and a supporting wall (12). The pressure hose is formed by a pressure hose element (2.1) which, when the apparatus is viewed in longitudinal section, has a L-, U- or oval-shaped cross section and at least one bent portion (22) extending away from a counter support surface (31) for the hose rearwardly towards the rear side of the apparatus and a support portion (21) for making planar contact with the counter support surface (31) for the hose, a hose-free space (150) being formed at each filling state of the hose by each bent portion (22) in a flat cavity (15) between the counter support surface (31) for the hose and the support wall (12).

Abstract: A four nip calender apparatus mounted on a single frame. The apparatus includes a first vertical calender mounted on the frame wherein the web passes through a first nip formed by a first calender roll and a second calender roll. The apparatus also includes a horizontal calender configuration providing two nips. The horizontal, three-roll arrangement is mounted on the frame and has a center roll and a pair of rolls positioned on opposite sides of the center roll which, with the center roll, provide the second and third nips. The apparatus also includes a fourth nip provided by a second vertical calender mounted on the frame.

Abstract: In a process and apparatus for producing long plastic sheets by pressing molten plastic materials between the forming roller and the forming drum unit, the forming drum unit comprising a thin cylindrical sleeve supported from inside by a drum support unit and pressed against the outer surface of the forming roller to deform elastically in a curve along the outer surface of the forming roller as it rotates, thus maintaining a relatively long contact length.

Abstract: A bearing control system for a roll with hydrostatic bearings which is mounted by its axle on a bearing block or other equivalent frame member by hydraulically loaded hydrostatic bearing elements. A principal bearing element acts in a principal loading direction and another bearing element is a backup bearing element which acts in a direction opposite to the principal loading direction. The bearing elements include bearing shoes positioned freely around the axle in order to support the axle so that the roll revolves freely in relation to the bearing block or other frame member. The control system feeds a hydraulic pressure medium to the hydrostatic bearing elements so that the roll is displaceable in the principal loading direction, e.g., in the direction of the nip plane, by displacing the axle via the bearing elements.

Abstract: A method for safeguarding against the entry of foreign bodies into a nip between two cylinders, which includes applying a deflection movement to one of the cylinders counter to a spring force applied thereto so as to overcome the spring force and, in accordance with a prescribed deflection distance, alternatively keeping the spring force to be overcome constant or reducing the spring force; and a device for performing the method.

Abstract: Calender for a material web that includes a roll stack having at least four rolls that includes an upper and a lower roll, a frame, and bearing blocks associated with the at least four rolls. The bearing blocks are movably coupled to the frame. The calender also includes a load device coupled to at least one of upper bearing blocks associated with the upper roll and lower bearing blocks associated with the lower roll, and tensile rods extending along and positioned on opposite ends of the roll stack. The tensile rods include upper and lower ends, the upper ends being coupled to one of the upper bearing blocks and the load device, and the lower ends being coupled to one of the lower bearing blocks and the load device.

Abstract: A vibration control apparatus (20) and method for a calender (18) for controlling vibration between two or more rolls (ex. 22, 24) which controls vibration induced thickness variations in a medium (27) exiting from the nip. The apparatus (20) includes a frame (19), a first and second rolls (22, 24) mounted relative to the frame (19), and a force generator (32), such as an electromechanical active actuator, servo-hydraulic actuator, controllable semi-active damper, Active Vibration Absorber (AVA), or Adaptive Tuned Vibration Absorber (ATVA), provides cancelling forces to control vibration between the first and second roll (22, 24) thereby, controlling such vibration induced thickness variations in the medium (27). Preferably, the apparatus (20) includes at least one sensor (ex.

Abstract: A calender includes a roll stack that has two end rolls and at least one intermediary roll, wherein the end rolls each have a deflection compensation device that acts in the direction of the intermediary roll. At least one end roll has an additional deflection compensation device that acts in the direction away from the intermediary roll. On the side of the at least one end roll which is remote from the intermediary roll is disposed a supplementary roll. This calender is able to carry out a matte satination operation without being fixed as to roll-specific pressures, which pressures must be of a precise magnitude so as to compensate for the deflection of the intermediary rolls.

Abstract: A coupling construction between an extended-nip roll including a non-revolving central axle supported by bearings which permit angular deflection of the non-revolving axle and a backup roll. Loading members are mounted on the non-revolving axle for pressing a loading shoe toward the backup roll. The extended-nip roll includes a flexible glide-belt mantle whereby a paper web or board web passes through the nip between the glide-belt mantle and the backup roll. The belt mantle revolves on support of separate bearings. The extended-nip roll and backup roll are interconnected from the bearing housings at the ends of the rolls by tie bolts which include a nut at one end which is threaded onto the threading at the end of the tie bolt. The tie bolt is associated with pre-tightening equipment at the other end of the tie bolt and is passed through bolt holes provided in the bearing housings to be coupled together. The other end of the tie bolt has the threading with which the pre-tightening equipment is coupled.

Abstract: A precision roll stand includes a roll housing absorbing the rolling forces. In the roll housing rolls constituting a roll pair with their roll chocks are mounted so as to be rotatable and mutually adjustable by an adjustment device which changes the axial distance between the pair of rolls. A drive housing including a roll drive is connectable with the roll housing while establishing a drive connection of the roll drive with the rolls and being removable from the same while undoing the drive connection. In order to produce rolled products exhibiting extremely high measuring accuracies and to be able to exchange the rolls quickly and without difficulty, the roll housing has a frame which is open in the direction of adjustment of the rolls and contains and guides the chocks of the rolls. A crosshead for closing the frame carries the adjustment device designed as a pressure medium cylinder and is rigidly connectable with the frame. The drive housing is supported on the crosshead.

Abstract: A roller has a rotary hollow cylinder through which extends a non-rotary crosshead. The hollow cylinder is supported on the crosshead by two opposite rows of hydrostatic supporting elements. When the roller is operated at particularly low linear pressures in the roll gap, a uniform linear force over the whole width of the paper web is exerted in the row of supporting elements opposite to the roll gap, causing an increase in the hydraulic pressures required in the row of supporting elements that faces the roll gap, until said pressures reach a range in which perfect operation of the supporting elements is ensured.

Abstract: A roller bearing apparatus for supporting a compensation roller that is disposed adjacent to a roller of a roller stack. The compensation roller has an axis. The roller stack has an axis. A plane is defined by the compensation roller axis and the roller stack roller axis. A bearing support is disposed in a frame. The bearing support receives a ball joint. The bearing support is movable relative to the frame to act as a lever. The bearing support pivots about a pivot point. A pressure transducer is disposed between the frame and the bearing support. The pressure transducer acts in a direction that is disposed exterior to the ball joint. The pressure transducer extends on both sides of the plane and acts perpendicularly to the plane.

Abstract: An equalizer assembly that integrates into the die cutting station of a press and comprises two hydraulic actuators, each of which interacts with one of the jackscrews of the press to create an internal hydraulic pressure. The internal pressure of a first of the hydraulic actuators corresponds to a loading force that is imparted upon the rotary cutting die proximate to a first end of the rotary cutting die, and the internal pressure of a second of the hydraulic actuators corresponds to a loading force that is imparted upon the rotary cutting die proximate to a second end of the rotary cutting die. The hydraulic actuators are in fluid communication with one another such that the hydraulic pressures therein are maintained substantially equal to define an overall system hydraulic pressure, and the hydraulic actuators are designed and arranged so that the loading forces generated thereby are substantially equal.