Abstract: A wet cyclone having a slender body with a truncated cone at an end thereof includes a heavy fraction outlet at an apex of the truncated cone and an immersion tube on the other end of the body. The immersion tube is cylindrical for withdrawal of a light non-gaseous fraction. A diffuser within the immersion tube deflects the flow within the tube for recovery of pressure head. The diffuser is disposed at a distance from the inlet end of the immersion tube of at least about half the inside diameter of the immersion tube.

Abstract: A winding device for paper or cardboard with at least two axis-parallel support elements for the sheet winding, which extend at least over the length of the sheet winding (T) and of which at least one is a carrier roll (2). The other support element has a rigid carrier (4), which guides the sheet winding over a sheath (7, 7') arranged in a rotating manner around the carrier or guided in a flexible tubing manner, and a carrying shoe (5, 5') combined with it and acting hydrodynamically with respect to sheath (7, 7'), which carrying shoe is provided with a concave pressure surface whose radius of curvature essentially corresponds to the maximum winding (T) including the sheath wall thickness, whereby carrying shoe (5, 5') can be adapted in its position to the size (position of the periphery) of the sheet winding (W') which is wound and present each time.

Abstract: A coating device having an applicator roll which forms an application slot with the backup roll which conducts the web of material. Adjoining the applicator slot is a pressure space which is formed at the outlet side of the application slot and between the applicator roll and the backup roll. A flexible guide wall having a shape which approximates or is adapted to the surface of the backup roll and/or can be adapted thereto by the Coanda effect itself, which wall forms a narrow slot along the web of material downstream from the pressure space. The wall is at such a slight distance away from the web that the formation of drips or streaks in the applied coating by the centrifugal force is excluded. The dosaging place for the final dosaging is formed by a dosaging doctor.

Abstract: A coating device includes a plurality of parallel coating blade lamellae made from highly wear-resistant material. The lamellae are disposed against one another in a housing and held thereby, forming a lamella packet wherein each lamella of the packet is disposed at the same inclination with respect to a plane perpendicular to a longitudinal axis of the packet. The inclination of the lamellae is adjustably controlled by at least one adjusting device acting on the packet. Thus, a change in lamellae inclination also changes a step-wise configuration of a surface contour formed by neighboring lamellae of the packet.

Abstract: A radial hydrostatic motor (radial piston machine) has a cylinder spider rotationally fixed and secured against axial displacement on a shaft and having a plurality of radial bores with pistons and sliding blocks that slide on the inner face of a hub ring or bushing. The bores communicate through control slots with high/low pressure delivery channels that open laterally into the cylinder spider in order to control the hydraulic media flow rate. Two mutually spaced rotors have bores with intercommunicating opposite control slots. Between both rotors is provided a housing intermediate partition having control disks opposite to the rotors and provided with channels which correspond to the control slots.

Abstract: An arrangement for dosing with a blade, in coating machines or similar, onto a running web of paper or cardboard carried by a roll in or with the arrangement. The blade is forced by means of a hold-down or several hold-down sections on the roll respectively the web. A transmitter transmits light, notably laser light. The blade features in the area between the contact line of the hold-down on it, and its contact line on the roll respectively the web, on its side away from the roll, at least one light-reflecting layer for reflection of the light ray directed by the transmitter at the layer. A receiver registers the position or angle of the ray reflected upon it by the light-reflecting layer of the blade. A controller is provided for controlling, dependent on the position signal of the receiver for the reflected light ray, the angular position of the blade, notably in its area between the contact line of the hold-down or the hold-down section and the roll.

Abstract: A dosing system with a doctor element fashioned as a doctor rod, for the coating of material webs which are passed over at least one roll coordinated with the doctor element. The doctor element is accommodated in a bed supported by a holder of integral design with the bed and held on the wall of a mounting which at the same time is a bounding wall of the mouth channel for the coating mixture. The holder features on its end on its side opposite the mounting wall a clamping or mounting surface. The holder possesses in the end area of the mounting wall bounding on the feed channel a jump in thickness. On its side opposite the said clamping or mounting surface, a protuberance is provided with a bevel which with the bounding wall of the holder contained on the side opposite the clamping or mounting surface forms an angle between 15.degree. and 55.degree., which bounding wall surface is flush with the surface of the mounting wall.

Abstract: A flotation device includes an injector having a flow channel with a variable cross sectional area with respect to the direction of fluid flow through the injector. The injector introduces a mixture of gas and liquid into the device. The injector flow channel has repeated narrowings and widenings in the direction of fluid flow through the injector.

Abstract: A roll press with two press rolls which together form a press gap and whose axes are situated in a press plane. A journal is disposed on the ends of each roll, with pillow blocks for receiving the journals, with a rack for supporting the pillow blocks, and with tie rods which are arranged on both sides of the press plane and at least approximately parallel to it. Cradles are provided which support the pillow blocks. Between the cradles and the pillow blocks is an articulated joint which enables the pillow blocks to pivot about an axis which extends perpendicularly to the press plane and essentially in the axial plane of the respective roll.

Abstract: The invention relates to a coating device for coating moving webs of material, more particularly webs of paper or board, comprising a belt or hose (7), which is trained about the curved guide surface of a beam- or rod-like support member (1) and a drive roll (6), a cooperating roll (C) carrying the web, a coating gap (9) being defined between the cooperating roll (C) and the hose (7) for the application of the coating material to the web or the roll, a support beam (3), which extends in parallelism to the roll and the drive roll (6), for supporting the support member (1), and between the same a pressure hose (4) for the transmission of the support forces.

Abstract: Two press units have axes which lie in a pressing plane which is inclined to the vertical direction and they form a press nip with each other. The two press units are supported by bearing brackets which are coupled in pairs to each other by detachable tension bars which transmit the pressing force. The bearing brackets of the one press unit are supported rigidly (i.e. directly on a machine frame, foundation, or the like) and bear at least a part of the weight of the other press unit. A support device on the machine frame, foundation, or the like at least temporarily takes up a component of the weight of the other press unit which is directed transverse to the pressing plane.

Abstract: A method of manufacturing a web of fibers, especially a web of paper. The pulp is uniformly distributed through an outlet over the width of the machine and along a wire or between two wires. Most of the moisture is subsequently extracted from the pulp accommodated on or between the wires at a draining point. Various amounts of retaining agents are added to the pulp at sections across the headbox and the web in order to control the level of retention sectionally.

Abstract: The invention is directed to a sickleless internal gear pump including an internal ring gear and a pinion meshing with the ring gear. The internal ring gear and pinion having a common width and a plurality of teeth extending across the width. Each tooth has a tooth head with an involute profile. Each ring gear tooth includes a tooth head having a slot therein. The ring gear has a plurality of radial ports. A housing rotatably carries the internal ring gear and the pinion, and includes a suction port, a pressure port and an axial expanse corresponding to the teeth width. A plurality of sealing elements are respectively disposed in the ring gear tooth head slots. The sealing elements are radially movably disposed in the slots, and each sealing element defines an end face of the tooth head. The end face has an exterior profile corresponding to the involute profile. Each sealing element comprises a stop surface and a fixed stop.

Abstract: A hydrostatic displacement machine has in a revolving cylinder block several displacement elements movable in a guideway and having a radial position during the rotation of the cylinder block determined by a nonrotating displacement ring. The displacement elements, viewed axially, are retained on the displacement ring by two retaining rings. The retaining rings feature relative to the displacement ring a radial seal. The axial seal of the retaining rings is effected in standstill, relative to the housing or housing lid, by way of spring elements, and during the pumping operation, by a contact force which is indirectly dependent on the operating pressure.

Abstract: The invention concerns a support beam of a coating system for coating a web of paper or cardboard carried in or at the coating system by a roll, the support beam having a length about the same as the roll. Tie rods or thrust rods are distributed around the periphery of the support beam and are spaced at least 50 mm from the center of gravity line of the cross sectional surfaces of the beam. The cross sectional surfaces are disposed perpendicular to the longitudinal axis of the support beam. Traction or thrust devices apply a tension or compression force to at least one of the tie rods or thrust rods.

Abstract: The invention is directed to a paper machine for the production of a fiber web, including a headbox for forming the fiber web. Disposed adjacent the headbox is either a dewatering unit, e.g., a dewatering cylinder, a double wire former or a four-drinier wire section. Also provided are at least one press unit for dewatering the fiber web, a tissue drying cylinder for finish drying the fiber web, a device for fiber web pickup from the tissue drying cylinder (Yankee cylinder), e.g., a creping doctor or a Clupak device, and a carrier belt for carrying the fiber web. At least one of the press units is configured as a shoe press for drying the fiber web, and includes a device for immediately separating the fiber web from a press felt after at least one press pass. The belt is preferably water impermeable, and an adhesion force between the water impermeable belt and the fiber web is greater than an adhesion force between the press felt and the fiber web.

Abstract: In a twin-wire former for the production of a paper web, two wire belts (11 and 12) together form a twin-wire zone which is divided into three sections (I, II and III). In the first section (I) the two wires (11, 12) travel over a curved forming shoe (16). They form there a wedge-shaped inlet slot (15) with which a headbox (10) is directly associated. In the second section (II), several resiliently supported strips (27) rest against the lower wire (11) and between each of said strips (27) a rigidly mounted strip (28) rests against the upper wire (12). In the third section (III) both wire belts (11, 12) pass over another curved forming shoe (23).

Abstract: The device has two mutually parallel slats extending crosswise to the running direction of the wire, namely an approach slat and a departure slat which with a wire guide surface each touch the revolving wire. Contained between the two slats is a blowing slot connected to a compressed air supply. Forming between the approach slat and the wire is a wedge-shaped gore tapering in the wire running direction, into which gore empties a water spray system. The departure slat has a step type clearance at the point where the wire leaves the wire guide surface.

Abstract: A drying section of a paper making machine has a series of single tier drying groups, all with their respective felt belts arranged so that the drying cylinders are in contact with and dry one side of the web. The single tier groups are followed by one double tier drying group wherein the web passes such that the top side, then the bottom side, then the top side, then the bottom side, etc. of the web is in contact with successive drying cylinders arranged in two rows. Steam under pressure is supplied to all the drying cylinders. In the double tier group of drying cylinders, the steam pressure supplied to a first set of drying cylinders in sequence is higher than the steam pressure supplied to a second set of drying cylinders.

Abstract: A pump with axial thrust compensation having an external housing, a main shaft within the housing to which are axially fixed two spaced apart rotors. The main shaft supports the rotors apart at respective collars against which the rotors are clamped. Each rotor including a series of radially displaceable elements within respective bores. The stroke rings for the rotors are rigidly attached to each other by a respective bearing shaft. A respective stroke ring around each rotor for moving the displaceable elements into and out of the bores. A respective control slot into each of the bores in the rotor and the control slots of each rotor extending laterally toward the other rotor.