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| Number | Title | Issue Date |
| 5762756 | Methods and apparatus for pulping and deinking Methods and apparatus for recycling office waste paper and the like of the type having ink and laser print particles coated thereon. The waste paper is simultaneously pulped and ink particles dispersed by kneading the waste paper in the form of a high sol... | 06/09/1998 |
| 5711153 | Precision hydraulic adjustable stop Repeatable no-backlash adjustable hydraulic stops are disclosed which have a rigid body which defines a cavity. One or more elastically deformable end plates are mounted in closing relation to the body cavity for enclosing and encapsulating an amount of l... | 01/27/1998 |
| 5599098 | Extruder screw with multiple flighting A plastic materials screw has a metering section defined by a series of axially extending discontinuous and partially overlapping flightings. The flightings overlap each other by about a half to one turn to define overlapping portions whereby the flow in ... | 02/04/1997 |
| 5599097 | Extruder screw for plastic extruders An extruder screw for use in the barrel of a plastic materials extruder is formed with a melt section which includes a melt flighting and a compaction channel and which also includes a barrier flight in which only smooth transitions are formed to prevent ... | 02/04/1997 |
| 5591336 | Apparatus for dewatering and or washing papermaking stock Improved apparatus for dewatering or washing a suspension of paper pulp in which first and second rolls are rotatably mounted with an endless loop of wire tensioned around the rolls, and in which a headbox delivers a pulp suspension to be thickened or was... | 01/07/1997 |
| 5582686 | High pressure water jet comminuting Broke handling and reducing apparatus and method for comminuting a moving continuous sheet or web material such as paper broke in the dryer or converter section of a papermaking machine, includes a plurality of high pressure water jet cutting nozzles moun... | 12/10/1996 |
| 5466335 | Paper pulp washing A wire-type pulp washing machine includes an endless moving foraminous wire which extends about a breast roll defining an on-running end and a couch roll defining an off-running end with a generally horizontal upper run of the wire extending between the r... | 11/14/1995 |
| 5385240 | Screening apparatus with adjustable hydrofoil portion Apparatus for screening a papermaking pulp or stock suspension through a stationary cylindrical screen includes a rotating hydrofoil member which has a curved outer or camber surface portion mounted for rotation with the camber surface in a close but spac... | 01/31/1995 |
| 5384014 | Apparatus and method for thickening pulp and paper stock Apparatus and method for thickening a suspension of solid particles in liquid employs three rolls ranged in spaced relation with their axes defining a triangle, and a single loop of wire is trained around and in wrapping relation with all three rolls. Wit... | 01/24/1995 |
| 5382327 | Apparatus for thickening pulp and paper stock Embodiments of apparatus for thickening a liquid suspension of solid particles, such as papermaking pulp in water, include a pair of spaced apart rolls and a woven wire or plastic wire belt trained around these rolls. The suspension is supplied to the app... | 01/17/1995 |
| 5367894 | Apparatus and method for washing cellulosic pulp A flat bed, Fourdrinier-type, countercurrent washer for cellulosic pulp incorporates a pressing section at the downstream end thereof which includes the couch roll and additional rolls that carry out multiple mechanical pressing operations on the pulp aft... | 11/29/1994 |
| 5356496 | Splice tail tape-down method and apparatus In the field of unwinding webs from an unwind stand in which a fresh web is prepared with a paste strip and is lapped spliced to a progressing expiring web, and the expiring web is then cut upstream of the splice to form a tail, the position of the tail i... | 10/18/1994 |
| 5330340 | Pelletizer with automatic knife adjustment A plastic resin pelletizer system for controlling the position of the pellet cutting knife blades in relation to a die plate face includes vibration detection pick-up in the form of a piezoelectric accelerometer mounted to the pelletizer die plate. Charac... | 07/19/1994 |
| 5324389 | Waste paper disintegration, classification and pulping system A method of pulping baled waste material includes breaking up the bale and applying the broken bale to a fluffer or shredder to form a fluffed waste paper product containing heavy and light contaminants. This product is applied to an air separator from wh... | 06/28/1994 |
| 5275024 | Paper pulp washing A wire-type pulp washing machine includes an endless moving foraminous wire which extends about a breast roll defining an on-running end and a couch roll defining an off-running end with a generally horizontal upper run of the wire extending between the r... | 01/04/1994 |
| 5266168 | Gravity type pulp washer or thickener with rotating disrupters A cylinder type paper pulp washer or thickener apparatus includes a rotatable cylinder mold with a forming wire surface. The mold rotates at least partially submerged in a vat of dilute paper pulp stock and a differential pressure across the wire surface ... | 11/30/1993 |
| 5262003 | Method and system for defibering paper making materials A process of preparing a suspension of paper making fibers in water for use in the making of paper includes the steps of treating a mass of fibrous materials, such as shredded waste paper materials, with steam under pressure in a closed vessel, and transf... | 11/16/1993 |
| 5234172 | High pressure water jet comminuting A cutter for comminuting a moving continuous sheet or web, such as paper broke, in the dryer or converter section of a papermaking machine, includes a plurality of high pressure water jet cutting nozzles positioned in a conduit section for receiving such ... | 08/10/1993 |
| 5221437 | Screening apparatus for paper making stock Screening apparatus for separately removing knots and heavy reject particles from paper making stock comprises a generally cylindrical vertical housing having the interior thereof separated by a cylindrical perforated screening member into an annular scre... | 06/22/1993 |
| 5189775 | Zone controlled deflection compensated roll A deflection controlled roll has a rotatable shell supported on a non-rotating central beam by a plurality of individual shoes which are positioned transversely of the beam between the beam and the shell. A curved semicylindrical surface of the shoe bears... | 03/02/1993 |
| 5186332 | Paper stock screening apparatus having heavy rejects trap Screening apparatus for paper making stock comprises a generally cylindrical vertical housing having the interior thereof separated by a cylindrical perforated screening member into a screening chamber and an annular accepts chamber on the inner and outer... | 02/16/1993 |
| 5186791 | Apparatus for thickening pulp and paper stock A method for thickening a liquid suspension of solid particles, such as papermaking pulp in water, uses a pair of spaced apart rolls and a woven wire or plastic wire belt trained around these rolls. The suspension is supplied at the first roll for centrif... | 02/16/1993 |
| 5133832 | Process and system for preparation of waste paper stock with short and long fiber fractionation In apparatus and methods for preparing deinked paper making stock, the initially pulped and cleaned stock is fractionated by filtering through a continuously moving mesh belt of a predetermined mesh size which will retain substantially all of the fibers o... | 07/28/1992 |
| 5122229 | Apparatus and method for washing cellulosic pulp In a flat bed, Fourdrinier-type, countercurrent washer for pulp, the opportunities for the development of foam are minimized by "wet" operation of the washer so that the pulp mat remains essentially full of liquid as it passes from each washing zone to th... | 06/16/1992 |
| 5078275 | Screening apparatus for paper making stock Apparatus for screening papermaking stock comprises two annular flat screening plates arranged in parallel spaced relation to form a screening chamber therebetween which is bounded on its outer periphery by a cylindrical wall, and wherein a rotor includes... | 01/07/1992 |
| 5072834 | Screening apparatus for paper making stock Pressure screening apparatus for paper making stock embodies a cylindrical perforated screening member which defines screening and accepts chambers on the inside and outside thereof respectively in a closed housing which is filled with liquid stock under ... | 12/17/1991 |
| 5064537 | Seamless screen cylinder with laser cut openings Screen cylinders, and methods of making the same for use in removing contaminant particles from papermaking stock, have a seamless cylinder body and the openings or slots therethrough are formed by directing a focused laser beam at an outer surface while ... | 11/12/1991 |
| 5051151 | Side extraction pulper with screw type rotor Apparatus for pulping a web of broke advancing downwardly thereto comprises an open tub having at least one generally vertical side wall wherein at least one pulping rotor is mounted for rotation on a substantially horizontal axis. A screw of an axial len... | 09/24/1991 |
| 5039412 | Wire with guide belts for a pulp thickener A high speed stock thickener has a foraminous endless wire. The stock thickener is of the type in which an open mesh endless wire is trained over a pair of rolls and paper stock to be thickened is applied between the wire and the rolls and is carried on a... | 08/13/1991 |
| 5028315 | Froth flotation apparatus and method In froth flotation apparatus for separating solid particle impurities from a liquid suspension stock in a flotation cell, provision is made for aerating the stock flowing through the inlet conduit leading to the cell by positioning a drum-shaped rotor hav... | 07/02/1991 |
| 5022984 | Froth flotation apparatus and method Apparatus for separating contaminant particles from liquid suspension stock, e.g. in the de-inking of used news print, is characterized by one or more of a plurality of features which contribute to increasing the capacity and effectiveness of the apparatu... | 06/11/1991 |
| 5021159 | Apparatus for thickening pulp and paper stock In apparatus for thickening a suspension of pulp material which includes an endless foraminous belt wrapping two spaced horizontally supported rolls, a special doctor mechanism is provided for transferring thickened pulp from the bare surface of the secon... | 06/04/1991 |
| 5014924 | Apparatus and method for roll changing on a continuous winder In a winder for continuously winding a web material into rolls on successive cores, roll changing apparatus for cutting and transferring the web material from a full roll to an empty core includes two sets of water jet nozzles mounted for reciprocating mo... | 05/14/1991 |
| 5006056 | Film extrusion apparatus including a quickly replaceable chill roll In extrusion apparatus for producing a continuous film of thermoplastic material, either as part of an extrusion coating or laminating process or to cast a continuous film, a chill roll which receives the film directly from the extruder is mounted on a wh... | 04/09/1991 |
| 4993652 | Continuous winder for web materials A continuous winder for web material includes two pairs of turret arms mounted for rotation with respect to each other on a common axis, and also includes a lay-on roll mounted for lateral movement toward and away from the axis of the turret arms. The lay... | 02/19/1991 |
| 4948467 | Extended nip press with induced repulsion An extended nip press for papermaking machine extracts water from a web of paper on a forming felt passing over a backing roll employing electromagnetic repulsion forces. In one embodiment, a belt is formed with permanent magnets which have thickness orie... | 08/14/1990 |
| 4919797 | Screening apparatus for paper making stock In screening apparatus for paper making stock comprising a cylindrical screening member dividing the interior of a pressure housing into a supply chamber and an accepts chamber, and also comprising a rotor mounted for rotation in the supply chamber and in... | 04/24/1990 |
| 4901417 | Method of finishing screen plates A screen plate and method of making a screen plate for the pressure screening of papermaking stock in pressure screening apparatus includes slots which have been cut therethrough by a machining laser beam focused at the inlet side of the plate, to provide... | 02/20/1990 |
| 4885090 | Screen plates A screen plate and method of making a screen plate for the pressure screening of papermaking stock in pressure screening apparatus includes slots which have been cut therethrough by a machining laser beam focused at the inlet side of the plate, to provide... | 12/05/1989 |
| 4875977 | Horizontal twin wire machine with vertically adjustable open roll and deflector blade All of the essential operating parts for adding a top former assembly to a new Fourdrinier paper machine or for converting an existing Fourdrinier paper machine into a top former are carried by a supplemental frame assembly which can be mounted on the mai... | 10/24/1989 |
