Abstract: A suction roll assembly for sealing at least one negative or positive pressure zone which adjoins a surface of the roll which is perforated and moves in a movement direction in a machine for making paper, tissue or cardboard, has at least one sealing element which lies opposite the moving surface and is arranged in a receptacle which can be moved to change the format of the negative or positive pressure zone. In order to simplify the adjustability of the receptacle in order to position the sealing element, there is a signal transmitter which is connected directly or indirectly to the sealing element and the signal of which can be received on that side of the moving surface which faces away from the sealing element.

Abstract: A paper machine for continuous production of paper in a paper web (4) is described. The paper machine comprises a plurality of drivable rolls (5) for control of the paper web (4) and a translation device for moving a means essentially perpendicular to the paper web (4), which translation device comprises a motor, a holder for the means (16), and an attachment device (17), a first arm (18), being arranged on the attachment device (17) turnable around a first axis (23) of rotation and arranged to be turned by the motor (15), and a second arm (19), being arranged turnable around a second axis (28) of rotation, at a distance from the first axis (23) of rotation, mechanically coupled to the first arm (18). The holder (16) and the mechanical couplings are arranged in such a way that the rotation of the first arm (18) by the motor (15) results in an essentially linear movement of the holder (16).

Abstract: A process and apparatus for cleaning a transport belt of a machine for the production or processing a web. The apparatus includes at least one nozzle device composed of a rotatable nozzle head having at least one cleaning nozzle, a transport device including a crosspiece extending substantially crosswise to a transport belt travel direction, in which the at least one nozzle device is coupled to the transport device and adapted for displacement along the crosspiece. A traversing speed of the nozzle device is very low and falls within a range of between approximately 1 mm/min and 10 mm/min. Alternatively, the at least one nozzle is positionable in a plurality of cleaning positions that are successively arranged crosswise to the transport belt, and the at least one nozzle is held stationary in each respective cleaning position for a predefined time period.

Abstract: The invention provides a novel impact angle changing shower for spraying a fluid upon a moving belt surface while the belt travels at a selected belt velocity. The shower includes nozzles journaled to rotation about an axis in a plane normal to the belt surface and transverse to the belt direction. The nozzles are continuously supplied with pressurized fluid and direct a fluid stream at a selected nozzle velocity and nozzle angle relative to the plane. The orientation of the nozzles is selected to optimize the desired function namely, to clean the belt surface without damaging the belt fabric or felt, or to penetrate the belt to increase fluid absorption by the belt. The fluid stream nozzle velocity can be decomposed using vector mathematics into two vector components: a belt velocity vector component parallel to the belt direction; and a belt impact velocity vector oriented at an impact angle defined relative to the normal transverse plane.

Abstract: A high pressure shower system for cleaning perforations in a suction roll of a paper-making machine is disclosed. An elongated header pipe is mounted to the outside of the suction box and is fitted with a plurality of spaced high pressure nozzles directed at and in close proximity to the inside surface of the suction roll. The header pipe is driven in a longitudinal reciprocating manner providing complete spray coverage of the suction roll perforations. The water supply conduit to the header passes through the inside of the suction box which has a sealed slot opening to accommodate the reciprocal movement of the header.

Abstract: A shower for conditioning a press felt or dryer fabric in a paper making machine, including a fixed housing extending laterally of the felt or fabric, and an oscillating conduit assembly in the housing including a plurality of nozzles spaced apart in series on the conduit assembly with each nozzle having a solenoid valve associated therewith and each solenoid valve being independently controlled to selectively open or shut the solenoid valves such that selective spraying of the press felt or fabric can be provided for.

Abstract: A shower system comprising a header having a fluid inlet port, a plurality of substantially vertically aligned spray nozzles attached consecutively to said header and arranged in a substantially arcuate formation, and a drive system for laterally reciprocating said header.

Abstract: A shower system for a screening machine or unit. The shower system includes a spray nozzle connected to a movement arm, a driver for longitudinally moving the movement arm in a reciprocal path, and an indexing system adapted to allow limited axial rotation of the movement arm at predetermined longitudinal positions of the movement arm.

Abstract: Papermachine felts and wires are cleaned and maintained by pressurized fluid jets or showers which are oscillated transversely across the felt running direction over a fixed oscillation stroke distance. Superimposed on the fixed stroke distance is a periodic shift of the stroke reference point so that successive oscillations are not terminated at the same point. The oscillation drive mechanism is enclosed within a low pressure, gas-tight housing serviced by a pressure regulated gas supply. A reversible A-C motor is used to drive the mechanism.

Abstract: A motorized shower head mechanism is disclosed in which a housing is provided with a track and a trolley, and a motor mounted on the trolley. The trolley is moved along the track by the motor and a shower head which extends through the housing is carried along by the trolley.

Abstract: A support and driving member comprises an open framework comprising a helical strip (38) supported by a series of support members (39) extending longitudinally of the helical strip and internally thereof. The member may be incorporated in a shower unit that comprises a tubular housing (1) with a longitudinal slot (6), the driving member (16) being located coaxially within the housing and mounted for rotation about its longitudinal axis. A driving motor (15) housed in an end cap (8) has an output shaft (24) that rotates the member (16). Mounted on the member (16) for movement along the latter is a nozzle carrier (5) carrying an air nozzle (41) and a water nozzle that discharge through the slot (6). The nozzles are connected via flexible supply lines (SL) within the housing (1) to inlets (34) for treatment fluids.

Abstract: A cleaner drive assembly used for driving a belt cleaning device such as a shower pipe unit provided in a papermaking apparatus having a sheet forming station including an endless belt to forwardly carry a wet web of paper thereon, the belt cleaning device being used to clean the endless belt by applying streams of liquid to the belt and being movable in opposite directions substantially parallel with the direction of width of the belt. The cleaner drive assembly is adapted to drive the belt cleaning device alternately in the aforesaid opposite directions and comprises a drive unit to produce rotary motions in alternately opposite directions, a rotary-to-axial motion converting unit to convert the rotary motions into reciprocating axial motions, the directions of the reciprocating axial motions being aligned with the opposite directions in which the belt cleaning device is movable.

Abstract: A method of cleaning a drying wire of a paper making machine using at least one pressurized water jet directed against the surface of the wire by a nozzle. The nozzle is supplied with water under a pressure higher than normal water pipe pressure, preferably a pressure of 430-1300 psi. The increased pressure of the water jet reduces the amount of water remaining in the wire due to increased water flow passing through the wire. Consequently the increased pressure of the water jet makes it possible to clean the drying wire during production and web formation.

Abstract: A spray cleaning apparatus for foraminous elements of papermaking machines and the like such as wires and felts and the like in which an elongate spray manifold for spraying liquid is mounted in an elongate carrier which is supported for movement longitudinally and relative to a machine element to be cleaned. A drive is provided for reciprocating the carrier longitudinally, and the spray manifold is arranged to be easily detachable from the carrier so as to move with the carrier while being removable therefrom as necessitated by maintenance service and the like.

Abstract: An endless belt comprising a signal element affixed thereto for identifying one complete revolution of such belt and an apparatus for cleaning such belt. Advantageously, such belt and cleaning apparatus may be used in combination with an apparatus such as, for example, a papermaking machine.