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| Number | Title | Issue Date |
| 7588663 | Multiple mode headbox A multiple mode headbox is provided including a support surface, two or more chambers, and an adjustable roof. Each chamber includes a plurality of nozzles adapted to optionally supply papermaking fibers to the support surface. The adjustable roof is operably config... | 09/15/2009 |
| 7578905 | Method and apparatus for transverse distribution of a flowing medium Methods for achieving even transverse distribution and propagation of a flowing medium are disclosed in which the flowing medium is supplied through a conduit and is deflected during diverging propagation in at least one distribution gap. The method includes ... | 08/25/2009 |
| 7332060 | Twin wire former Twin-wire former for producing a fibrous web. The former includes two endless wire belts arranged to form a twin-wire zone, a dewatering element, and a headbox positioned at an angle relative to an imaginary first horizontal plane. The twin-wire zone includes a firs... | 02/19/2008 |
| 7141139 | Multiple cleaning stages with various dilution points and accepts recirculated through a common pipe In a process and an arrangement for directing a papermaking pulp towards a regulated outlet (9), accept from successive cleaning stages (6, 14, 20) is totally or partly led towards the outlet (9) while excess accept is led in the opposite direct... | 11/28/2006 |
| 6821390 | Process and device to control quality parameters in paper, tissue and pulp dewatering plants Apparatus and process for controlling the basis weight cross-profile, the formation, the fiber direction and other quality parameters of a pulp sheet after the headbox in a dewatering plant. The apparatus including at least one suspension feed, at least one distribu... | 11/23/2004 |
| 6770171 | Method and system for controlling headbox in a paper/board machine A paper/board machine headbox (10) has a stock inlet header (J), a tube bank (11), a turbulence generator (13) and a slice opening (14) which is provided with a profile bar. The headbox (10) is provided with cross direction measuri... | 08/03/2004 |
| 6733627 | Method for manufacturing paper having variable characteristics A method for manufacturing paper having a variable characteristic in a crossmachine direction including the steps of feeding a slurry to a distributor and delivering the slurry from the distributor to a headbox through a plurality of delivery lines. The delivery lin... | 05/11/2004 |
| 6706151 | Pulp moulding process and related system A pulp moulding process including the steps of pulp stock, forming wet products by means of forming die (7), transferring the wet products from the forming die by means of a heated transferring die-and-heated pressing tool arrangement (13)(14) f... | 03/16/2004 |
| 6679974 | Procedure and means for generating turbulence in stock suspension flow In a paper machine headbox, a stock suspension flow passes through turbulence pipes (14an) and is distributed into superimposed layers. Stepped expansion spots (16) of the flow cross-section area of the turbulence pipes (14) or the positions of... | 01/20/2004 |
| 6669814 | Multi-ply paperboard prepared from recycled materials and methods of manufacturing same This invention, in one aspect, relates to a multi-ply paperboard having at least three inner plies and, in some aspects, a top liner and a back liner, wherein the multi-ply paperboard is derived from fiber sources comprising at least about 80% by weight r... | 12/30/2003 |
| 6491792 | Apparatus for controlling a headbox in a paper machine Method and apparatus for controlling the mixing proportions of feed streams being supplied to a headbox, using devices for sampling two or more of the feed streams upstream of the headbox and devices for measuring concentration of constituents in or other... | 12/10/2002 |
| 6461479 | Process and device for distributing a pulp suspension, particularly at medium consistency The invention relates to a process for distributing an especially medium-consistent fibrous suspension in front of a dewatering device. It is distinguished in that the fibrous suspension is taken to the dewatering device in fluidized form and evenly distr... | 10/08/2002 |
| 6451167 | Wetlay process for manufacture of highly-oriented fibrous mats A mat containing highly machine direction oriented (90% or greater), discontinuous reinforcement fibers, is produced on inclined wire or rotary paper making machinery. Fibers are first uniformly dispersed in an aqueous medium containing thickeners and wet... | 09/17/2002 |
| 6419793 | Paper making apparatus having pressurized chamber Method for forming a continuous web on a forming fabric includes providing a pressurized chamber, processing the forming fabric through the pressurized chamber, and distributing a pressurized flow of a slurry having a first composition in the pressurized ... | 07/16/2002 |
| 6406595 | Methods and apparatus to enhance paper and board forming qualities Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flo... | 06/18/2002 |
| 6342125 | Multi-ply web forming method and apparatus and a multi-ply paper or board product formed hereby A multi-ply web forming method and apparatus are disclosed for forming a top ply onto a base ply. A fiber suspension jet is by means of a secondary headbox (21; 21', 26) delivered into a twin-wire roll nip created by two tensioned wires (16, 22; 16', 22';... | 01/29/2002 |
| 6319363 | Sheet forming system and method for controlling the same A sheet forming system of a paper or cardboard machine. A headbox includes a headbox nozzle with to laterally extending side panels and first and second nozzle walls extending along a width of the machine. First and second screens converge in a region adj... | 11/20/2001 |
| 6284100 | Method and apparatus for controlling a headbox in a paper machine Method and apparatus for controlling the mixing proportions of feed streams being supplied to a headbox, using devices for sampling two or more of the feed streams upstream of the headbox and devices for measuring concentration of constituents in or other... | 09/04/2001 |
| 6221210 | Transfer paper for electrophotography and a method for producing thereof The present invention relates to transfer paper in electrophotography that shrinks by no more than 0.45% in a direction crossing a flow in making paper process and which has a two sideness shrinkage difference in a crossing direction ranging 0.02 to -0.02... | 04/24/2001 |
| 6214169 | Sheet formation system with deckle plates and method for reducing edge waves Sheet formation system and method for reducing wavy edges in a fourdrinier machine. The system includes a headbox having a nozzle bring adapted to produce a pulp suspension jet across a width of the machine, at least one rotating screen positioned to rece... | 04/10/2001 |
| 6176975 | Headbox A headbox in a paper machine, which headbox has a stock outlet for a jet of stock having a specific length, angle of impact and point of encounter in relation to a nip in the wet section of the paper machine, which headbox has two stand parts, lifting arm... | 01/23/2001 |
| 6146500 | Suction breast roll former and method, with flexible headbox roof A suction breast roll former has a support surface with a plurality of apertures formed therein that are operatively connected to a vacuum source. A headbox has a flexible roof extending downstream from a slice opening and disposed adjacent to a support s... | 11/14/2000 |
| 6139687 | Cross-machine direction stiffened dividers for a papermaking headbox Improvements in the internal dividers of a papermaking headbox are provided by stiffening the dividers only in the cross-machine direction. These cross-machine stiffened dividers provide for a smooth and thin divider that is flexible in the machine direct... | 10/31/2000 |
| 6117271 | Slice lip apparatus A slice lip apparatus is disclosed for guiding a flow of stock from a headbox so that the stock flows between a first and a second wire of a former. The apparatus includes a lip which is disposed adjacent to the first wire. A movable lip is spaced relativ... | 09/12/2000 |
| 6066235 | Wetlay process for manufacture of highly-oriented fibrous mats A mat containing highly machine direction oriented (90% or greater), discontinuous reinforcement fibers, is produced on inclined wire or rotary paper making machinery. Fibers are first uniformly dispersed in an aqueous medium containing thickeners and wet... | 05/23/2000 |
| 6019871 | Effective utilization of sap in producing non-woven webs using the foam process The foam process is used to make non-woven webs from cellulose or synthetic fibers, which webs have as a component super absorbent polymer (SAP). In order to minimize water absorbency by the SAP, it may have a protective coating that dissolves only after ... | 02/01/2000 |
| 5843281 | Headbox of a paper machine with edge feed arrangements A headbox of a paper machine which is provided with a dilution profiling system which uses a feedback-connected regulation system to control the cross-direction basis weight profile of the paper web produced by the paper machine. The dilution profiling sy... | 12/01/1998 |
| 5814191 | Arrangement and method for combining a dilution flow with a stock flow passed out of an inlet header in a paper/board machine A method and apparatus for combining a dilution flow with a stock flow passed out of an inlet header in a paper/board machine including dilution flow ducts through which the dilution flow is passed to selected locations across the width of the headbox of ... | 09/29/1998 |
| 5800678 | Method and device for regulating a flow of dilution liquid in connection with a headbox of a paper/board machine A system for combining a dilution flow with the stock flow passed from the inlet header of the headbox of a paper/board machine. The equipment comprises a valve which regulates the dilution flow and which consists of a valve housing, of a spindle, and of ... | 09/01/1998 |
| 5688372 | Method and device in the regulation of a headbox A method and device in the regulation of a headbox. The headbox includes a pulp inlet header, after the pulp inlet header, seen in the pulp flow direction, a distributor manifold whose pipes are opened into an intermediate chamber. The headbox comprises a... | 11/18/1997 |
| 5674363 | Method and device in the regulation of a headbox A method in the regulation of a pulp suspension flow through the headbox of a paper machine/board machine wherein an additional flow is introduced into the pulp suspension at different points across the width of the headbox. The concentration of the addit... | 10/07/1997 |
| 5578171 | Method and device for supplying pulp to a headbox of a paper machine A movement compensator apparatus and method for compensating for movements taking place during tilting of a headbox of a paper machine and preventing transfer of strains from a pulp supply pipe in the headbox to a stationary pulp supply pipe. The movement... | 11/26/1996 |
| 5565064 | Paper machine wet forming section and method of operation thereof In order to independently influence the dewatering performance of a wet forming section of a paper machine as well as the quality of a web produced by the machine, a paper machine head box is mounted on a swiveling device adapted to move a nozzle of the h... | 10/15/1996 |
| 5545293 | Method and device in the regulation of a headbox A method and device in the regulation of a headbox. The headbox includes a pulp inlet header, after the pulp inlet header, seen in the pulp flow direction, a distributor manifold whose pipes are opened into an intermediate chamber. The headbox comprises a... | 08/13/1996 |
| 5527433 | Device and method for choking a stock suspension flow in a paper machine A throttle device for stock suspensions in a paper machine including a feed line, a drain line and a spatially variable cavity connecting the feed line and drain line with each other. The cavities provided with a plurality of nestable walls in which the n... | 06/18/1996 |
| 5490905 | Method in the regulation of a multi-layer headbox and a multi-layer headbox A method and device for the regulation of a pulp suspension flow in a multi-layer headbox and a multi-layer headbox for a paper machine/board machine. For the formation of different layers in the web, at least two pulp suspensions having different pulp co... | 02/13/1996 |
| 5409575 | Two-wire web-forming section of a paper machine A two-wire web-forming section for a paper machine includes two wire loops, consisting of a first wire (1) and a second wire (2), water draining therethrough from a web (W) to be formed in two directions within a two-wire dewatering zone established by th... | 04/25/1995 |
| 5298125 | Fluid jet supported headbox A structure and method for the improved formation and dewatering of a papermaking web onto a porous forming surface wherein a layer of water is first formed by depositing water onto a traveling wire and a stock slurry is deposited from a headbox slice ont... | 03/29/1994 |
| 5279736 | Bend type separator for solid particle separation Sieve bend for separating particles of differing size in a liquid slurry. The bend structure defines a passage having an inlet end and a discharge end, with a throat of decreasing cross sectional area at the discharge end of the passage, and a sieve scree... | 01/18/1994 |
| 5277762 | Composite fiberboard and process of manufacture A novel composite board of mineral wool, perlite, and cellulosic newsprint fibers for use as an acoustical tile is disclosed. The board displays a high porosity, a fine pore structure, a low density gradient through its thickness and an acceptable strengt... | 01/11/1994 |
