Abstract: A starch based adhesive for use in manufacturing corrugated paper and board is prepared in a single preparation tank 20 by admixing, under high shear vortex mixing, a first portion of aqueous medium, a first starch portion, an aqueous sodium hydroxide, a borating additive, a second portion of aqueous medium and a second starch portion to produce a finished starch adhesive. At least one of the first and second portions of aqueous medium comprises a mixture of fresh water and recycled wash water selected from the group consisting essentially of untreated flexographic printing press wash water, untreated corrugator wash water, and mixtures thereof.

Abstract: A pellet cooler (10) includes an endless traveling grate conveyor (30), drive apparatus (34,36,40) operatively associated with the conveyor (30) for moving the conveyor in continuous travel about a continuous path, and a plurality of non-perforated material support trays (32) mounted to the conveyor in juxtaposed overlapping relationship to form a substantially continuous surface about the continuous path defined by the conveyor. Each of the material support trays comprises an elongated, laterally extending bi-lobed plate (50) having a first laterally extending outwardly projecting arcuate larger radius lobe (60) along one lateral extend thereof, a second laterally extending outwardly projecting arcuate smaller radius lobe (70) along the other lateral extent thereof, and a substantially flat laterally extending mid-portion (56) interconnecting the first lobe and the second lobe.

Abstract: A refiner element (10) for the refining of fibrous material is provided with a comminuting surface of which at least a portion comprises an abrasive surface. The method of forming the refiner element (10) comprises casting a metal substrate (20) having a frontal surface (22), melting a relatively thin layer of the metal substrate on the frontal surface thereof to form a molten pool in the comminuting surface over the region thereof on which an abrasive surface is desired, depositing an abrasive material (38) into the molten pool formed in the metal comminuting surface (22) of the refiner element (10), and allowing the molten metal pool into which the abrasive material (38) has been deposited to solidify whereby the particles of abrasive material (38) are strongly bonded into the metal surface of the refining element to form the abrasive comminuting surface thereon.

Abstract: An elongated, imperforate housing (2) has a slurry inlet port (5) at one end and a pulp discharge port (6) at the other end. A pressing section (2b) within the housing is in direct fluid communication with the inlet port, and extracts liquid from the slurry by passing the slurry through a first compression restriction (108) to produce a pressed pulp. An annular washing section (2c) within the housing is positioned immediately downstream of, and in direct fluid communication with, the first compression restriction. The washing section has radially inner (109) and outer (14) cylindrical walls defining an annular washing chamber (110) for decompressing, diluting, and washing the pressed pulp. The washing is accomplished by injecting a washing liquid into the washing chamber through the inner wall, and simultaneously through the outer wall while the mixture is agitated. A repressing section (2d) within the housing is in direct fluid communication with the washing section, for receiving the conveyed mixture.

Abstract: A nozzle block (66) and a sieve screen unit (12), in which the outlet aperture (78) of the nozzle body (68) has a substantially oval shape to produce a fan-shaped flow pattern against the screen (24). Two nozzle blocks (66a), (66b) are mounted within the sieve screen housing (24), each block having a substantially solid, cuboid body including an outlet aperture that distributes slurry over the full width of the screen.

Abstract: A hammer mill (10) having a feeder section (14) connected vertically above a mill section (12) such that feed material from a feed supply containing tramp metal (46) is introduced into the feed section and is divided therein into discrete quantities which are poured at a predetermined rate into the mill section. A continuously rotating feeder member (28) is situated in the vertically upper portion of the feeder section, the feeder member including means (40) for transporting a discrete quantity of feed material from a first position where the quantity is separated from the feed supply to a second position where the quantity is poured toward the mill section. A continuously rotating drum magnet (44) is situated below the rotating feeder member such that the quantities of feed material fall toward the drum magnet as the quantities are poured. In this manner, the tramp metal in the feed material is magnetically captured by the drum magnet and the remainder of the feed material falls into the mill section.

Abstract: A feed screw housing support includes a support pedestal (46), a spring loaded tie rod assembly (76), and a bearing assembly including pedestal bearing blocks (62) cooperating with mating bearing blocks (66) connected directly or indirectly to the housing. The tie rod assembly provides a resilient hold down force between the housing (32) and the pedestal (46). The interfacing surfaces (74) of the blocks are angled in such a manner that, when viewed from the ends, a line extending from each planar interface of the blocks passes directly through the axis (54) of the feed screw rotor (28).

Abstract: A discharging apparatus for a large diameter, generally vertically walled reaction vessel in which a recessed dish or receiving structure having the same diameter as the reaction vessel is mounted beneath the lower discharge end of the reaction vessel. There is an aperture in the floor of this receiving structure and a rotating impeller urges material received from the reaction vessel through this aperture into a smaller diameter recessed receiving structure which is also equipped with a rotating impeller to remove material to a screw conveyor for removal from the system. This screw conveyor can be significantly smaller than would be required using a conventional screw conveyor reaction vessel discharge.

Abstract: A rotary cutter comprises a housing having a base portion, a cover portion, and a working chamber defined therebetween. The cover portion has laterally extending side flanges adapted to mate and bolt to the upper surface of the base portion. A generally cylindrical rotor having a plurality of knives mounted about its periphery is mounted to a shaft horizontally disposed within the working chamber and adapted for rotation about its longitudinal axis. An inlet feed tube is mounted to the cover portion of the housing for feeding a material to be shredded into the working chamber. Camrolls are mounted to the four corners cover of the housing along the lateral side flanges thereof for translating the cover portion of the housing parallel to the longitudinal axis of the rotor along track means associated with the base portion of the housing along which the top portion of the housing may be translated on the camroll means.

Abstract: An inlet device comprises an inlet chute, an inlet hopper pan and two agitator blades in counter rotation above the flights of a plug screw feeder. The blades are housed in a pan which sealingly connects to a cast plug screw liner which is a U-shaped trough for the plug screw. The agitator blades are driven by shafts supported in pillow block bearings fastened to a main housing. The main housing holds a gear train driven by a right angle gearmotor. The gearmotor is also mounted on the main housing and drives abutting geats in counter rotation above the flights of the plug screw. A storage bin, reservoir, worm conveyor or some type of pulsating feeding arrangement feeds directly into the instant inlet device. The inlet device then feeds into line operations, e.g., a pulp refiner line operation.