Abstract: For bleaching cellulose pulp or a fraction thereof, e.g. reject pulp, the cellulose pulp or fraction, having a concentration of 0.5-10%, preferably 3-6%, is introduced into a screw press comprising at least a first (47) and a second (48) dewatering zone, is dewatered in the first zone to a concentration of 20-40%, whereupon a liquor of bleach chemicals is introduced centrally into the pulp which, during continued treatment, is dewatered in the second zone to a discharge pulp concentration of 15-50, preferably 15-30%, the liquid pressed out of the second zone, together with fresh bleach chemicals, being returned to the pulp in the screw press as liquor of bleach chemicals.

Abstract: A method and a device for simulating a larger width of felt/wire than the real one in a hot air plant for heat treatment of the felt/wire avoids a temperature drop towards the edges and of achieving a homogeneous temperature treatment all over the width of the felt/wire. Along the edges of the felt/wire adjustable sheetlike members or roller blinds are provided in the heating zone.

Abstract: An adjustable roller bearing for lateral guidance of travelling webs, e.g. a paper wire, comprises a bearing casing that is slidably mounted in a bearing foundation by the aid of members projecting diametrically from the bearing casing and bearing foundation and being in engagement with each other as well as encased by in hydraulic or pneumatic bellows which act to displace the bearing casing. The projecting members are provided with cooperating guide grooves and rollers respectively. The guide grooves are diametrically outside the contact faces of their associated roller, and have faces which in cross section follow a circular curve having the roller center as its center. Between each of these faces and the adjacent roller contact face there is a lining one end of which is adapted to the circular shape, whereas the other side, facing the roller contact face, is planar and forms a contact face for the corresponding roller.

Abstract: Apparatus for thickening, or de-watering, and refining fibre-pulpsuspensions include a screw-press thickener (1) and a refiner (2). In order to prevent air from entering the pulp and to provide a simpler arrangement, the outfeed end of the screw-press thickener (1) is connected directly to the infeed end of the refiner (2), therewith also to serve as an infeed screw to the refiner (2). In this respect the thickener (1) has a screening jacket (5) which embraces the screw (6). The screening jacket has at least one section which converges in the pulp feed direction, to achieve in the screw-press (1) a press effect required for de-watering the pulp while at the same time achieving the requisite reduction in diameter of the screening jacket (5) for connection to the refiner (2).

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: An assembly for heat treatment of a papermaking wire or felt comprises mutually opposing heating surfaces that are alternately offset in the direction of web travel and can be moved toward the felt/wire, thereby enabling one to obtain an ironing effect on both sides of the web simultaneously. The heating surfaces may constitute parts of respective box members whose interiors are formed for being heated by a heat medium, for example, hot oil.

Abstract: A roller having channels in the roller shell for a flow medium. The roller has an inner, tight, homogeneous shell, an outer shell, and intermediate ribs projecting out from the inner shell and sealed to both inner and outer shells to form the said channels.

Abstract: A cut squirt wherein a nozzle for a jet of cutting liquid is movably supported on a boom extending transversely of the direction of advancement for a web of paper and is connected to a supply hose for cutting liquid which is coiled in one layer on a driven drum and is connected at the drum to a feed conduit for said liquid, whereby the nozzle is driven back and forth along the boom when the hose is uncoiled from or coiled onto the drum. The drum end of the hose is attached to a carrier which rotates together with the drum and has cam engagement with a fixed guide member such that the carrier is displaced one hose width in the axial direction of the drum for each revolution of the drum, and in that a flexible, liquid-conduit connection is arranged between the drum end of the hose and the cutting liquid feed conduit to the drum.

Abstract: A stretching machine for treating removable belts supported on rollers, such as felts and wires in paper-making machines. The stretching machine comprises two rollers over which the belt is suspended, at least one of said rollers being adapted to be heated. A lifting device is inserted between the heatable roller and the belt, such that the belt can be held raised up from the roller.

Abstract: An apparatus for a wrapping machine in which a length of packing material is wound around a cylindrical object, especially a roll of paper, said apparatus comprising endless members, such as belts or cords, led over rollers, said endless members being in contact with the applied length of packing material in the circumferential direction of the roll during winding and serving to tighten the length of packing material around the cylindrical object.

Abstract: A submersible, hydraulically-driven pump rotating about a vertical axis, the pump having a short shaft between the hydraulic motor and the impeller of the pump. A cofferdam is placed around the hydraulic pipe and the hydraulic motor, extending from the pump housing to up above the cargo level, with a shaft sealing arrangement being provided between the motor and impeller. The cofferdam is formed as three consecutive chambers around the shaft, extending between the hydraulic motor and the impeller, whereby the upper, first chamber is a receptacle for oil leakage from the hydraulic motor, and the next, second chamber contains a sealing liquid under pressure and is sealed at the top and at the bottom by respective mechanical shaft seals against the upper, first chamber and the lower, third chamber, respectively.

Abstract: A lamella separator for sedimenting (gravity separating) comprises a lamella stack in which the lamellae are disposed horizontally. At least one sludge-removing device is arranged for cooperation with each lamella. A relative movement between each lamella and its associated sludge-removing device is effected.

Abstract: By pumping a liquid with a submerged rotary pump the distance from the submerged pump to the top of the riser pipe can be substantial and the liquid column left in the riser pipe from the pump constitutes a not insignificant residue. When the liquid level in the tank has sunk to the pump, the liquid in the riser pipe is caused to pass down into the pump and into and up through a relatively narrow pipe which leads from the pump housing at the pressure side of the pump impeller, the rotary impeller acting as check valve for the liquid.