Abstract: An apparatus especially suited for cleaning impurities from plastic screen belts of paper making machines is shown as having a first drum type brush operatively engaging, through its bristles, the screen belt. The bristles are made of material having a high affinity to such impurities. A second drum type brush, of which its bristles are made of material having a low affinity for such impurities, spaced from the screen belt, is in operative engagement with the first drum type brush as to remove the impurities, which the first drum type brush carries because of removal thereof from the screen belt, from the first drum type brush and deposit such impurities into a receiving area.

Abstract: An assembly for treatment of an endless wire or felt which passes around a support roll comprises a transversely elongated support frame, rails, means at each end of the frame for movable support of the frame on the rails into and out of a surrounding position in relation to the support roll, and a roll which is transversely disposed within the frame, as well as means for holding the roll in the frame in such a position within the frame that at a first surrounding position of the frame in relation to the support roll the frame roll obtains contact with the felt on the support roll and at a second surrounding position of the frame in relation to the support roll the frame roll obtains contact with a free section of the felt adjacent the support roll. The roll on the frame can be heated and has a drive motor for rotary movement of the roll about its longitudinal axis.

Abstract: Apparatus for processing paper wherein a pair of endless curved wire devices operate to pass therebetween a sheet material to be treated for a dewatering operation or the like. A support structure in the form of individual support segments made from sintered oxide ceramics are arranged to extend over the width of the apparatus and are in contact with one another, with a plurality of the segments being arranged consecutively in the direction of the course of the wire devices, the segments having a maximum linear expanse of 700 mm per segment and having junction areas between consecutively arranged segments defining a gap for feeding cooling water to the guide wire devices.

Abstract: An extended press mechanism for removing liquid from a traveling fibrous web including a press nip formed between first and second members with one of the members being a traveling flexible impervious belt and force means engaging the inner surface of the belt including a sliding shoe facing the belt with the shoe extending transversely across the belt usually of a width less than the belt and also extending in the direction of the belt travel to form an elongated press nip with means for pressing the shoe toward the belt with a predetermined force, means for providing a film of lubricating fluid between the shoe and the belt and means for removing the excess of lubricating fluid downstream from the shoe including a wiper blade extending toward the belt flexed against the belt to wipe off the lubricant with means to remove the lubricant which is wiped off and means at the side of the shoe to wipe lubricant off the uncompressed portion of the belt and means such as ribs and grooves at the edge of the belt to p

Abstract: An extended press mechanism for removing liquid from a traveling fibrous web including a press nip formed between first and second members with one of the members being a traveling flexible impervious belt and force means engaging the inner surface of the belt including a sliding shoe facing the belt with the shoe extending transversely across the belt usually of a width less than the belt and also extending in the direction of the belt travel to form an elongated press nip with means for pressing the shoe toward the belt with a predetermined force, means for providing a film of lubricating fluid between the shoe and the belt and means for removing the excess of lubricating fluid downstream from the shoe including a wiper blade extending toward the belt flexed against the belt to wipe off the lubricant with means to remove the lubricant which is wiped off and means at the side of the shoe to wipe lubricant off the uncompressed portion of the belt and means such as ribs and grooves at the edge of the belt to p

Abstract: Apparatus and method for dewatering papermaker's felt utilizing positive pressure, the felt being deflected in an arc of at least about 90.degree. but less than about 180.degree. by means of a dewatering shoe with a rounded nose having a radius of from about 2" to about 4", the nose of the shoe having an elongated orifice with an effective width of from about 1" to 4" through which air under pressure is directed into the felt. Low pressure flooding means or high pressure shower means may be mounted in the rounded nose of the shoe in advance of the dewatering orifice to direct a cleaning fluid into the felt in advance of dewatering.

Abstract: A method and apparatus for forming a fibrous web between a pair of forming wires. The apparatus includes an imperforate rotatable roll and a pair of liquid permeable forming wires which meet about a portion of the surface of the rotatable roll. Means are provided for delivering a liquid suspension of fibers between the forming wires as the wires are being received about a portion of the rotatable roll. The specific improvement of the present invention is centered around an arcuate imperforate roof conforming to the periphery of the rotatable roll along a limited part of the portion in which the twin wires are forming the sheet, with injection means for injecting pressurized air along the surface of the roof to form an air film therealong. Collector means are provided at the end of the forming portion for collecting liquid expelled from the forming wires during their travel along the portion of the roll.

Abstract: An apparatus for cleaning an endless paper making felt continuously during the paper making process, and wherein the moving felt is passed through a cleaning bath, and ultrasonic vibrations are applied substantially uniformly across the entire width of the felt while the felt is immersed in the bath, to thereby achieve uniform cleaning of the felt and thus uniformity in the paper produced on the machine. The apparatus comprises an open, rectangular tank having a removable end wall, and a guide roll and ultrasonic transducers movably mounted in the tank, whereby the endless felt may be readily removed and/or replaced by removing the end wall, and lifting the guide roll and transducers, so that the felt may be slipped into the tank beneath the guide roll and transducers.

Abstract: A method for the separation of the paper web from the forming fabric in a paper-making machine comprising dividing the web into lengthwise strips to lessen the web adherence to the wire by utilization of a spray means incorporating a plurality of nozzles and then effecting web knock-down and separation from the wire by use of a slotted spray through which pressurized air jets are directed.Through this method very low pressures are required to achieve web separation and the risks of re-contact between web and wire are positively prevented.

Abstract: A web spreading and guiding device to maintain a running paper sheet making foraminous web comprising a wire or pick-up felt transversely taut and straight running in a papermaking machine, has a pair of free running pneumatic tires having their treads in nipping relation to one another to engage a margin of the web in the nip, the tires being carried by an arm which is pivotally biased to effect transverse web stretching bias of the tires on the web margin running through the nip. Generally one of the devices will be mounted to act on one margin of the web and another of the devices on the opposite margin of the web and the devices being cooperatively biased to stretch the web in opposite directions. Means are provided to control the tire bias for correcting any deviations of the web from a straight running path.

Abstract: A felt conditioning system is disclosed for use in connection with paper-making apparatus wherein an endless belt of absorbent felt is pressed at a station along the path of belt motion, into contact with a paper sheet in order to de-water the latter. In accordance with the invention, the felt is purged of water and other foeign matter transferred thereto from the paper, by passing the belt around a hollow, foraminous conditioning roll at high speed. Air pressure controlled within selected limits is applied to a portion of the inside surface of the belt in contact with the roll. The combined action of centrifugal force, air pressure and gravity expels the water and foreign matter carried by the belt.

Abstract: A suction box cover for a Fourdrinier papermaking machine includes a leading portion having a top surface which supports a travelling Fourdinier fabric. The leading portion has a channel across its length which includes a lower manifold region and an upwardly projecting throat region that opens upon the fabric supporting surface. A lubricating fluid is fed to the manifold region and flows upwardly through a series of orifices in a metering member retained within the channel to the fabric supporting surface to lubricate the fabric.

Abstract: A web-forming method and apparatus to be used in the manufacture of paper. A web is formed at one side of a travelling wire while at the opposite side thereof, from a location in close proximity thereto, jets of steam are directed toward the wire to produce an implosion at the opposite side of the wire, as well as directly in the wire and in the web. The jets of steam issue from openings in the wall of an enclosure which is situated in close proximity to the said opposite side of the wire, this enclosure having in its interior steam which issues through the openings to form the jets. A plurality of these enclosures may form part of a forming board, and also one or more of the enclosures may be situated along the wire at a part thereof which has travelled beyond the forming board.

Abstract: This invention relates to a method and apparatus for guiding endless woven fabric belts such as are used on paper making machines. Specifically, the instant application teaches the use of a guide shower, which is disposed across the width of the endless belt, to provide the guiding action. The shower comprises a series of nozzles which are adapted to be directed at one edge or the other of the endless belt. Three separate embodiments are disclosed. In one of the embodiments, the shower pipe connecting the nozzles is divided into a left side and a right side. The nozzles on the left side are all directed at the left edge of the endless belt whereas the nozzles on the right side are directed at the right edge of the endless belt. In a second embodiment, two parallel shower pipes are disclosed, the nozzles of one of the shower pipes all being directed at the left edge of the endless belt, the nozzles of the other pipe all being directed at the right edge of the endless belt.

Abstract: An elongated shower pipe, extending across a paper stock treatment machine, such as a Fourdrinier, instead of being a uniformly simply supported span, is supported on brackets at each end designed to significantly reduce the deflection of the shower pipe. The brackets include fixed supports inboard of the ends and deflection means, outboard of the supports, which apply a moment of force in a direction opposite to the forces exerted by the gravity on the central span of the pipe. Threaded means adjusts the amount of anti-sag force.