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| Number | Title | Issue Date |
| 4830709 | Multi-ply web forming apparatus and method A multi-ply paper web forming apparatus utilizes first and second forming wires which travel in a co-running path for a portion of their length and which form a throat into which an aqueous slurry of paper pulp fibers is introduced. The slurry is dewatere... | 05/16/1989 |
| 4818338 | Method for emptying suspension for a pulper In a pulping apparatus including a pulper with a rotor near the bottom therein, the pulper has a sluice outlet at the bottom for acceptable pulp suspension. Above the rotor at a corner of the pulper is a second outlet for suspension and dirt. A conduit le... | 04/04/1989 |
| 4816117 | Method for the preparation of waste paper A method and apparatus for decomposing waste paper in a storage tank (tower) under the effect of chemicals with a high stock concentration (high-consistency stock method), including the rotation of the paper pulp together with dilution and a vigorous exte... | 03/28/1989 |
| 4812204 | Process for obtaining boric acid treated asbestos fiber The invention relates to novel borated asbestos fibers which possess improved filtration properties.... | 03/14/1989 |
| 4812208 | Headbox for paper machine with parallel twisted plates A plurality of stages of parallel twisted plates extend in a slurry passage adjacent to a slice outlet of a head box in the direction of papermaking slurry flow therethrough and are spaced apart from each other by a predetermined distance. The twisted pla... | 03/14/1989 |
| 4808310 | Apparatus for liquid treatment of pulp with vapor separation An apparatus having a liquid-permeable belt for receiving cellulose pulp, a liquid supply device for discharging treatment liquid on the cellulose pulp, and a container extending across the entire width of the belt for collecting treatment liquid penetrat... | 02/28/1989 |
| 4808263 | Method for fiberizing wastepaper using an inline control valve for make-up air Fiberizer efficiency is improved by providing an inline control valve at the fiberizer feed inlet which automatically provides the fiberizer with make-up air proportional to the pressure differential between the fiberizer outlet and inlet. The make-up air... | 02/28/1989 |
| 4806208 | Method of seaming a seamed felt on a papermaking machine with oppositely tapered pintle elements A pintle unit and method of closing a seam in a papermakers felt which provides a tight closure along the full length of the seam. The seam is closed with a pintle unit made up of a plurality of pintle elements which are tapered and pulled into the seam t... | 02/21/1989 |
| 4804439 | Means and method for removal of strings from waste paper A method and apparatus for removing stringy contaminants from a pulp in a wastepaper recovery system having a pulping vat with an elongate helically shaped rod in the vat with means for causing a relative rotation between the stock and the helical rod so ... | 02/14/1989 |
| 4804441 | Paper machine headbox and approach flow system Method and apparatus in the headbox of a paper machine and in its approach pipe system. In the headbox, pulp suspension is fed through the approach pipe system and a pressure screen arrangement, if any, to a distributing header part, from which the pulp s... | 02/14/1989 |
| 4802955 | Dewatering band press side seals The invention concerns a dewatering band press. The wires (2) in the press are wider than the rolls (1), and in view of sealing the edge of the pulp web (3), two rails (4) are placed outside the ends of the rolls, the wires running between the said rails,... | 02/07/1989 |
| 4792380 | Fastening of a profile bar to an adjustment spindle in a head box Fastening of a profile bar to adjustment spindles at a discharge opening of a head box of a paper machine. A series of fastening holes or recesses are made into one edge of the profile bar and provided with chamferings. In the end of the adjustment spindl... | 12/20/1988 |
| 4792381 | Closed and compact press section of a paper machine with double S shaped path or mirror image thereof A closed press section of a paper machine for removing water from the paper web passing therethrough. A compact press roll combination is provided with several press nips being formed in association with various rolls, and between which the web runs suppo... | 12/20/1988 |
| 4790909 | Two-wire paper forming apparatus A two-wire paper forming apparatus wherein the co-running forming wires converge over a forming roll and diverge over a couch roll downstream of the forming roll. A curved forming zone begins where the forming wires converge over the forming roll to recei... | 12/13/1988 |
| 4790908 | Extended nip press belt guide and method An extended nip press has a looped belt mounted over a shoe having a concave surface which presses the belt against a mating surface on a roll to provide an extended nip. The shoe has a support which is movable in a skewing sense relative to the longitudi... | 12/13/1988 |
| 4789429 | Method of making mechanical pulp A method for producing mechanical pulps which are useful for producing coated light weight paper, magazine paper and the like, is disclosed, which includes preheating lignocellulose-containing material in the presence of impregnation chemicals, refining t... | 12/06/1988 |
| 4789433 | Skimming blade with wave shaped troughs for a papermaking machine Skimming blades in papermaking machines have a dewatering surface 4 adjoining the supporting surface 3 supporting the wire 1. To sustain the desired microturbulence of the fiber suspension 2 on the wire 1, the dewatering surface 4 is provided with troughs... | 12/06/1988 |
| 4786364 | DMDAAC/AM copolymers as deinkers The instant invention is directed to a method for deinking cellulosic fibrous material impregnated with ink wherein a mixture of said material and water is stirred in the presence of a deinking agent, the improvement wherein the deinking agent is a hydrol... | 11/22/1988 |
| 4784726 | Paper machine head box with adjustable perforated plate flow ducts A paper machine head box includes perforated plates being used as a distributor and a turbulence generator and having flow ducts, of which the ones at the edges are of different size than the remaining flow ducts. According to a preferred embodiment, slid... | 11/15/1988 |
| 4783241 | Head box for a paper machine A head box has a preferably fixed flow-carrying wall (11) and a movable flow-carrying wall (13) defining a nozzle-like stock conduit (14) and an outlet slot (15). The movable wall is provided with an adjustable profile bar (35) at the stock outlet slot. F... | 11/08/1988 |
| 4781794 | Detackification of adhesive materials contained in secondary fiber The present invention involves the use of a methyl cellulose derivative to control the depositing tendency of adhesive materials contained in waste paper and paper products which are being utilized to produce finished paper products.... | 11/01/1988 |
| 4780967 | Apparatus for the recovery of waste heat contained in the exhaust from dryers of paper machines Method and apparatus for drying paper webs continuously manufactured in paper machines, by the use of process steam produced by a two-substance compression heat pump with a solution-circuit. A portion of the thermal energy needed for the drying process is obta... | 11/01/1988 |
| 4781793 | Method for improving paper properties in multiply paper using long and short fiber layers Method in a paper manufacturing process for improving the properties of the paper, in particular its retention. In the method, the fibre material is passed through a refining and screening system to the head-box arrangement of a paper machine, which compr... | 11/01/1988 |
| 4781795 | Heated drum having high thermal flux and belt press using same The invention is a fluid heated drum especially well adapted for use with a drum press in which high press roll nip loading and high heat flux to a pressed web are both encountered. A press of this type is disclosed in detail. However, the drum is more br... | 11/01/1988 |
| 4780199 | Bar screen cleaner A bar screen cleaner utilizes a reciprocal carriage mounted downstream of a vertical bar screen to move a cleaning rake vertically to clean accumulation from the screen. The cleaning rake is pivotally mounted to the carriage such that the rake is positive... | 10/25/1988 |
| 4780183 | Method of using a dual compartment vacufoil unit to eliminate secondary headbox chatter A dual compartment vacufoil unit for making linerboard grade or other multi-layer paper comprising a dual compartment vacufoil and a forming blade and a method of using same. The dual compartment vacufoil unit is positioned beneath the forming blade, with... | 10/25/1988 |
| 4780179 | Method for producing pulp from printed unselected waste paper A waste paper recycling process relates to the treatment of a mixture of waste paper containing non-cellulosic contraries and printing inks, in order to release the contraries from the fibers and further to separate them from the stock in order to produce... | 10/25/1988 |
| 4780184 | Method for the adjustment of the dewatering in the wire section of a paper machine A method and apparatus are provided for the adjustment of the dewatering in the wire section of a paper machine. A fiber web is fed on to a forming wire, and the forming wire is passed over the surface of at least one dewatering means and a partial vacuum... | 10/25/1988 |
| 4775446 | Seam for a papermaking machine screen or felt A joinable paper machine felt assembly includes a plurality of spaced first and second cross-threads, the cross-threads being longitudinally spaced and each first cross-thread being laterally spaced from a second cross-thread for thereby defining a plural... | 10/04/1988 |
| 4772358 | Method for making pulp Method and appparatus for making pulp of grinding goods, such as fibre material, in the grinding zone of a grinding apparatus by pressing it against a grinding surface provided with a pattern extending in the direction of movement of the grinding goods ov... | 09/20/1988 |
| 4771814 | Seam for multilayer papermaking fabric and method of making same A technique of forming a seam in a woven multilayer papermaking fabric provides a machine side join for the ends of each machine direction filament with a machine side knuckle formed in such machine direction filament and spaced from the closest exit poin... | 09/20/1988 |
| 4770742 | Method for increasing the efficiency of a causticizing process A method for increasing the efficiency of the caustizing process which comprises: (a) adding to a green liquor between 78 and 82% of the stoichiometric amount of lime necessary to react with the amount of Na2 CO3 present in the green... | 09/13/1988 |
| 4770745 | Front wall and support arrangement at the headbox of a papermaking machine The front wall and support arrangement is shaped as a stiff support structure extending across the entire machine width above a slice chamber. The support structure is deformed due to its inherent weight and because of the pressures and temperatures preva... | 09/13/1988 |
| 4769111 | Support apparatus for a dewatering unit in the web forming section of a paper machine The present invention relates to a support apparatus of a dewatering unit (30) below a bottom wire of the twin wire forming section of a paper or board machine. The problem in known, corresponding arrangements has been insufficient crosswise stiffness of ... | 09/06/1988 |
| 4767501 | Method for equalizing compression pressure in a press nip of a paper machine An arrangement for equalizing the compression pressure acting on a web passing through a paper machine press nip formed by two opposed press rolls and through which of at least one press fabric passes. At least one resilient loop component passes through ... | 08/30/1988 |
| 4764256 | Removal of polychlorinated biphenyls by solvent extraction A method is provided for continuous removal of polychlorinated biphenyl compounds (PCB) from oil contaminated therewith, comprising the steps of continuously extracting PCB compounds from contaminated oil with a PCB-selective solvent in the stripping sect... | 08/16/1988 |
| 4759391 | Two layer papermachine embossing fabric with depressions in the upper fabric layer for the production of tissue paper A papermachine fabric for the production of tissue paper or porous batts has a two layer fabric comprised of a fine upper fabric layer and a coarser lower fabric layer. Both fabric layers have a large open area. The two fabric layers are firmly interconne... | 07/26/1988 |
| 4758310 | Belt and drum-type pressing apparatus A press belt arrangement in which none of the compressive forces on the central drum are transmitted to the supporting frame. It provides a method in which a greater compressive force in relationship to belt tension is applied to the drum. The invention m... | 07/19/1988 |
| 4755286 | Split flow `V` screen A paper pulp processing mechanism and method for screening large flows of wood chips including a screening bed for receiving a delivery of a quantity of wood chips at a screening receiving station, the flow of chips dividing to flow laterally in one direc... | 07/05/1988 |
| 4753712 | Papermachine felt shower oscillator Papermachine felts and wires are cleaned and maintained by pressurized fluid jets or showers which are oscillated transversely across the felt running direction over a fixed oscillation stroke distance. Superimposed on the fixed stroke distance is a perio... | 06/28/1988 |
