Abstract: An apparatus for sorting a fibrous suspension for removing both heavy weight and light weight particulate impurities is disclosed. An antechamber is positioned above a main chamber. Fibrous stock suspension is inletted tangentially to the antechamber and moves down to the main chamber. An annular rotor in the main chamber creates a vortex of the fibrous stock suspension, which drives the heavier particulate impurities to the side wall of the main chamber and moves the lighter weight impurities toward the center of the vortex. The heavier weight impurities fall to the bottom of the main chamber from which they are removed. The lighter weight impurities are removed by a drainage line extending toward the center of the antechamber. Above the rotor is a strainer and the rotor cooperates with the strainer to drive purified fluid suspension to an annular outlet chamber surrounding the bottom of the antechamber and from there into an outlet line.

Abstract: The disclosure concerns a head box for use in a paper making machine, or the like. The open channel through the head box leading to the outlet opening has at least one and more usually a plurality of guide surfaces extending through the channel. The guide surfaces are supported between the side walls of the head box and are spaced from the top and bottom of the head box and, when a plurality of guide surfaces are provided, they are spaced vertically from each other. The guide surfaces are comprised of flexible foil-like material. The guide surfaces are anchored at pivots at their upstream ends and are supported intermediate their lengths toward the outlet openings by a respective tab projecting from each side edge thereof into a receiving slot in the respective side wall of the head box. A tension spring operates in opposition to the shifting of the tab and the guide surface under the influence of the flow through the head box.

Abstract: Water used in the treatment of waste paper is now commonly re-cycled. Hard water is required for such processes. For maintaining the hardness of the water, the re-cycled water is hardened by dissolving calcium carbonate and carbon dioxide in it, thereby forming calcium bicarbonate. An apparatus for hardening the water comprises a mixing container with inlets for waste water, carbon dioxide, and calcium carbonate, and with outlets for foam, hardened water and undissolved calcium carbonate.

Abstract: The disclosure concerns an apparatus for separating impurities from a fibrous suspension. The apparatus includes a tiltable housing having a screen basket supported coaxially therein. A rotor is supported inside the screen basket. The rotor has three zones. There is an upstream zone communicating with the fiber suspension inlet, and inlet in the upstream zone is into the interior of the rotor and then outward past sorting vanes formed at the exterior of the rotor in the first zone and inside of the basket. Downstream of the transport vanes is a second baffle zone defined by a closed drum having transport vanes on the outside thereof. The suspension and impurities are moved downstream by the transport vanes in the second zone. Downstream of the second zone is a third zone with further means for moving impurities downstream, comprising either a centrifugal impeller in the form of vanes or a helical ring.

Abstract: A roller for a paper machine, including: a tube passing axially through the shell of the roller; a respective holder for each of a plurality of counterbalancing weights; the holders being annularly spaced around the tube; a spring pushing each holder around the respective weight supported thereon toward the inside surface of the roller shell.

Abstract: A former for a paper machine: The paper machine includes a perforated forming cylinder and a suction device for drawing water inward through the perforations. An inner and an outer belt are wrapped around the forming cylinder. The outer belt meets the inner belt at the peripheral surface of the forming cylinder in a generally wedge-shaped inlet slot located at and upstream of the bottom of the forming cylinder. A pulp fiber suspension nozzle of a width that covers the axial length of the forming cylinder injects pulp into the inlet slot. A supporting device is provided at the inlet slot and includes a convexly curved surface, convexly curved around an axis generally parallel to the cylinder axis. The supporting device includes a concavely curved surface that follows the convexly curved surface downstream of the flow of pulp. A suction device communicates with the concavely curved surface beneath the outer belt. The outer belt rides over the convexly curved surface and down onto the concavely curved surface.

Abstract: An arrangement of pipes, as in a riser line for use as in the art of shelf drilling, is shown as having a plurality of pipes connected in end-to-end fashion with a joint operatively interconnecting a pair of adjacent pipes and allowing relative pivotal movement of one of such pair of pipes with respect to the next adjacent of such pair of pipes about an axis extending transversely of that pair of pipes, the axis of pivotal movement of each joint being substantially at right angles to the axis of pivotal movement of each adjacent or succeeding spaced joint.

Abstract: A process and plant for treating waste paper in which a beater is employed for rough-pulping the waste paper followed by a first sorting stage from which the separated-out foreign matter is processed further in a subsidiary circuit which includes a vibratory sorter for lightweight foreign matter and a hydrocyclone for heavy foreign matter, the fibers separated out during this further processing being returned again to the treatment process. In the first sorting stage, a sufficiently rigorous separation process is carried out to remove the greater part of the foreign matter, together with unpulped lumps of fibers, which is then passed to the subsidiary circuit in which it and half-stuffs still containing foreign matter, which have been sorted in the hydro-cyclone and in the vibratory sorter, are subjected together to a multi-stage further sorting and speck-removing process.

Abstract: A device for generating a thrust in a liquid utilizing rotating cylinders. The cylinders are mounted on a rotatable hub and rotate about their own axes relative to the hub. The relative rotation follows, preferably, a sinusoidal path for producing the thrust, and in particular, each cylinder undergoes a reversal in its direction of rotation after each half rotation of the hub. A common control bar is included which is connected to each cylinder and eccentrically with respect to the axis of rotation of the hub so that the points of reversal and the direction of thrust can be adjusted.

Abstract: The invention concerns a wood pulper of the kind in which wood is fed via a hopper having advancing elements arranged on two opposite sides by which wood is advanced to a grinding stone. The invention is characterized in that said advancing elements comprise a plurality of driven shafts which are arranged parallel to and adjacent each other substantially transverse to the feed direction, said shafts being equipped with a plurality of toothed discs lying adjacent to each other. This arrangement enables the driving force to be distributed over a plurality of feed shafts, so that a continuous compression can be obtained which increases as the wood feeds through the hopper.

Abstract: The invention relates to a paper machine of the kind having a continuous inner wire cloth and a continuous outer wire cloth which are passed together around a deflecting component, located within the inner wire cloth, for effecting extraction of water through the outer wire cloth, said machine also having a water extraction box located within the inner wire cloth in front of the deflecting component, and a breast (delivery) box, an upper lip of which lies adjacent the inner wire cloth in the vicinity of the water extraction box and defines, with a support surface provided by the water extraction box, a preliminary water extraction zone in which water can be extracted through the inner wire cloth into the water extraction box.

Abstract: A first pipe or shaft-like structure having a first end is shown operatively connected to a second pipe or shaft-like structure having a second end in a manner whereby the first and second ends spaced from each other and in fluid communication with each other; a coupling apparatus or joint structure operatively interconnects the first and second pipes; the joint structure employs liquid filled resiliently deflectable first and second force transmitting members as inner connections respectively functionally interconnecting a rigid portion of the joint structure to a rigid portion of the first pipe and to a rigid portion of the second pipe.

Abstract: A supporting device for a strainer belt in a paper making apparatus of the type including a plurality of wear strips which, in use, are disposed transversely to the strainer belt, each of the strips having a wear surface on which the belt is supported as it passes over them. Each of the wear strips is adapted to be clamped on a supporting element between a leaf spring and a retaining plate, which are secured to the supporting element, said strip having a bearing surface which rests on the bearing surface of the support element. The wear strip has a symmetrical shape so that the wear surface and bearing surface may be disposed interchangeably either to face the strainer belt or to face the bearing surface of the support element.

Abstract: Method and apparatus for separating ink from pulped inked paper: a suspension of pulped paper and chemicals enters a cylindrical container tangentially near the container bottom and rotates around the interior of the container; the ink and chemicals form a foam that floats off the suspension of paper fibers; the suspension exits from the container tangentially near the container top; a funnel at the top of the container; a foam outlet near the axis of the container from the funnel; a vortex generator at the bottom of the container, which blows upwardly creating a vortex in the suspension; means disperse air in the suspension in the container inlet before the suspension enters the container through the container inlet; the dispersing means either comprises a rotor cooperating with a stator, or comprises deflector plates in the container inlet; air is supplied to the inlet at the dispersion means rotor or deflector plates; the deflector plates may be washed clean.

Abstract: A papermaking machine is shown with an inner traveling screen and an outer traveling screen which are led towards each other to form a generally layered arrangement therebetween during a region of their joint travel and, in such region, the inner and outer screens are caused to pass over a portion of a water extracting or dewatering roller; a water collection apparatus situated outside of the roller serves to collect water centrifuged from the screens passing over the roller; and a preliminary water extraction zone preceeds the roller and such zone extends over a portion of, for example, a generally horizontal section of the inner screen.

Abstract: Apparatus for segregation of fibers from a suspension which contains relatively heavy contaminants has two elongated parallel but not coaxial horizontal vessels which are welded or strapped together and one of which is located below the other. One end of the lower vessel is connected with a pipe which admits the suspension and the other end of the upper vessel is connected with a pipe for evacuation of segregated fibers. The vessels have openings for portions of at least one row of discrete centrifugal separators each having a tangential inlet for suspension which communicates with the first vessel, an upwardly extending first outlet which discharges fibers into the upper vessel, and a downwardly extending second outlet for impurities. Each separator is detachable from and reattachable to both vessels.

Abstract: A Yankee clyinder whose internally heated shell consists of steel or cast iron and is provided with an external layer of pure or alloyed copper, molybdenum, tungsten or another metal whose thermal conductivity greatly exceeds (and preferably amounts to at least twice) the thermal conductivity of the material of the shell. The thickness of the layer is in the range of 0.4-2 millimeters, and the thermal expansion coefficient of its material is identical to or approximates that of the material of the shell. The layer can be applied to the periphery of the shell in molten state in the form of a finely atomized spray. The drying action of such cylinder upon a running paper web greatly exceeds the drying action of a cylinder whose shell consists exclusively of cast iron or steel.

Abstract: Waste paper is fed into a horizontal drum and therein treated with suitable liquids to form pulp. A magnetic device is disposed adjacent one side of the drum to produce a magnetic field along one arcuate section and extending from the upper portion toward the bottom thereof. Magnetic particles mixed with the paper are carried by said arcuate section of the drum by virtue of the influence of the magnetic field until they reach the top where they leave the field and then fall downwardly into an inclined trough from which they gravitate to the exterior of the drum. Pulp is concurrently discharged from the drum.

Abstract: The web drying section of a paper machine has a plurality of drying cylinders; an air permeable belt passes around one cylinder and the web to be dried passes outside the belt around the one cylinder; gussets defined in the region of initial engagement and final disengagement of the feeder belt with the one cylinder; the entrance side gusset includes an air lock to eliminate the boundary layers of air on the feeder belt and the drying cylinder and to minimize return of ambient air into the entrance side gusset, thereby to hold the web to the belt and drying cylinder; the exit side gusset includes an air lock adapted to permit the boundary layers of air to leave the exit side gusset and also to minimize return of ambient air into the exit side gusset; features of the air locks are disclosed; additional suction means improve the vacuum in the air lock gussets.

Abstract: Apparatus for removing impurities entrapped in a suspension of fibrous material includes a fluidized bed chamber having opposite ends, a top wall, and a perforated bottom wall. An inlet feeds the suspension to be purified to a diffusing chamber which imparts laminar flow thereto and, in turn, feeds the suspension to the fluidized bed chamber through one end thereof for flow across the bottom wall toward the other end. A pressure chamber is positioned below the fluidized bed chamber and communicates with the bottom wall thereof, the pressure chamber having a plurality of walls thereacross dividing the same into a plurality of sections. A manifold has branches communicating with each section of the pressure chamber for introducing a fluidizing agent under pressure thereto for upward flow through the perforations in the bottom wall and through the suspension therein thereby to separate impurities from the suspension by flotation.