| Patents for D21B 1 - Fibrous raw materials or their mechanical treatment (6,805) |
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| 11/18/1997 | US5688369 Dispersion of fiber pulp |
| 11/18/1997 | US5687923 Gradual pressure applying type de-inking device for paper material |
| 11/13/1997 | DE19618529A1 Flotation process and devices for de-inking pulped waste paper |
| 11/12/1997 | EP0806649A2 Procedure for determining the diffusion coefficient prevailing in the fibre wall in a suspension containing primary and secondary fibre and for determining the proportion and papermaking properties of secondary fibre |
| 11/12/1997 | EP0806518A1 Device for kneading high consistency pulp |
| 11/11/1997 | US5685952 Deinking of paper using magnetic forces |
| 11/05/1997 | EP0805232A2 A method for preparing a blade-coated paper and a blade-coated paper product |
| 11/05/1997 | EP0805231A2 A method for preparing paper and a paper product |
| 11/04/1997 | US5683650 Bubble apparatus for removing and diluting dross in a steel treating bath |
| 11/04/1997 | US5683590 Treatment of waste paper |
| 10/29/1997 | CN2265993Y Differential speed roll pulp grinder |
| 10/28/1997 | US5681429 Mixing device in pulping |
| 10/22/1997 | EP0802275A1 Process to improve the whiteness of paper pulp |
| 10/21/1997 | US5679221 Pulping recyclable paper material, removing contaminants, pressing, adding polymeric flocculant to fluid to agglomerate soluble aluminum-based material, transferring to clarifier, removing and disposing of aluminum, reclaiming fluid |
| 10/16/1997 | DE19714000A1 Washing system for wood chips |
| 10/15/1997 | EP0801168A1 Method and apparatus for recycling laminated film |
| 10/14/1997 | CA2009586C Method and apparatus for fiberizing and cellulosic product thereof |
| 10/09/1997 | CA2187604A1 Method and apparatus for recycling laminated film |
| 10/08/1997 | EP0799346A1 Separation of cellulosic and non-cellulosic fractions from paper products |
| 10/07/1997 | CA2095150C Treatment of absorbent sanitary paper products |
| 10/05/1997 | CA2200368A1 Mixer rotor |
| 10/01/1997 | EP0798416A1 Flotation process and device for separating solid particles of a paper fibre suspension |
| 10/01/1997 | CN1160474A Plant fibre liquid covering for weed seeding and its production process |
| 09/24/1997 | EP0796153A2 An elastomeric joint for a blade tensioning mechanism |
| 09/24/1997 | EP0742741A4 Blade tensioning mechanism |
| 09/24/1997 | CN2263125Y Roller pulp flow type hydraulic pulp breaking screening machine |
| 09/23/1997 | US5669560 Non-pulpables collection chamber with removable basket for solid waste pulpers |
| 09/16/1997 | US5667079 Automated multi-grade wastepaper recycle center sorting system |
| 09/12/1997 | WO1997033036A1 Magnetic deinking of waste papers |
| 09/12/1997 | CA2248131A1 Magnetic deinking of waste papers |
| 09/10/1997 | EP0793747A1 Methods for pulping and deinking |
| 09/09/1997 | US5665207 Strainer for paper making |
| 09/04/1997 | WO1997032073A1 Production method |
| 09/03/1997 | EP0792689A1 A refiner and a method for attaching or detaching discs thereof |
| 09/02/1997 | US5662790 Air contactor with foam separation vessel system |
| 08/27/1997 | EP0791395A1 A refiner and a method for attaching discs thereof |
| 08/27/1997 | EP0791103A1 Method of papermaking having zero liquid discharge |
| 08/27/1997 | EP0791098A1 Apparatus for fluffing pulp |
| 08/27/1997 | EP0694096B1 Apparatus and method for treating a pulp slurry of waste paper |
| 08/26/1997 | US5660718 Method and apparatus for separation by flotation |
| 08/26/1997 | US5660687 Pressing fibrous web against drying surface coated with plasticized polyamine/epihalohydrin resin adhesive, releasing; papermaking |
| 08/21/1997 | WO1997030206A1 Method for recovering fiber from printed wastepaper |
| 08/21/1997 | CA2246507A1 Method for recovering fiber from printed wastepaper |
| 08/13/1997 | EP0788567A1 Wood chip strand splitter |
| 08/13/1997 | CN2259429Y Straw screw extruding machine |
| 08/13/1997 | CN1157016A Low-resident high-temp high-speed chip refining |
| 08/13/1997 | CN1035599C Device for admixing medium and pulp suspension |
| 08/12/1997 | US5656129 Method of producing fibers from a straw and board products made therefrom |
| 08/12/1997 | US5655718 Apparatus, system and method for treating process material such as waste material |
| 08/07/1997 | WO1997028305A1 Process and apparatus for treatment of fibrous raw material |
| 08/07/1997 | CA2244933A1 Process and apparatus for treatment of fibrous raw material |
| 08/05/1997 | USH1672 Tissue products made from low-coarseness fibers |
| 07/30/1997 | CN1155916A Kneader for paper stuff |
| 07/30/1997 | CN1155915A Process and plant for crushing a cellulose material |
| 07/29/1997 | US5651879 Cell for treating a liquid medium by means of flotation |
| 07/24/1997 | WO1997026408A1 Method for marking paper and apparatus for detected marked paper |
| 07/24/1997 | WO1997026401A1 Process for producing pulp from lignocellulosic plants, and pulp obtained |
| 07/24/1997 | DE19701129A1 Breaking-up paper pulp, useful for paper or cardboard manufacture |
| 07/24/1997 | CA2242232A1 Process for producing pulp from lignocellulosic plants, and pulp obtained |
| 07/22/1997 | US5650120 Bubble-operated recirculating pump for metal bath |
| 07/22/1997 | US5650111 Process of making cellulose products from straw |
| 07/22/1997 | US5650044 Paper-pulp deinking method and equipment to implement this method |
| 07/16/1997 | EP0783380A1 Low velocity air density separator |
| 07/10/1997 | WO1997024186A1 Industrial utilisation of garbage with effective recycling and with 0ptimisation in energy production |
| 07/08/1997 | US5645229 Beating by shafts which having finger arms attached to split ring fasteners |
| 07/03/1997 | WO1997023291A1 Refining element |
| 07/02/1997 | EP0781171A1 Open air density separator |
| 07/02/1997 | CN1153240A Pollution-free paper making method |
| 06/26/1997 | WO1997022749A1 Process for treating refiner pulp |
| 06/19/1997 | DE19618887A1 Paper fibre pulp is worked economically in compact accessible machine |
| 06/18/1997 | EP0779109A1 Low velocity air density separator |
| 06/18/1997 | CN1035203C Bagasse depither |
| 06/17/1997 | US5639419 Bubble operated dross diluting pump for a steel treating bath |
| 06/17/1997 | US5639346 Magnetic removal of "stickies" from waste papers |
| 06/14/1997 | CA2192629A1 Low velocity air density separator |
| 06/12/1997 | DE19649764A1 Waste paper pulping comminuter with easily exchangeable sieve parts |
| 06/11/1997 | CN2255997Y Grass pre-immensing and pulping apparatus |
| 06/05/1997 | WO1997020102A1 Method and apparatus for continuously preparing cellulose pulp |
| 06/04/1997 | EP0711369B1 Method and apparatus for treating filler-containing material, such as recycled fibers |
| 06/03/1997 | US5635123 Biocomposite material and method of making |
| 06/03/1997 | US5635005 Method of recycling support material for image-bearing support |
| 05/28/1997 | EP0775233A1 Kneader for paper stuff |
| 05/28/1997 | EP0775232A1 Low-resident, high-temperature, high-speed chip refining |
| 05/27/1997 | US5632859 Intergral pulp mill and method of constructing an integral mill |
| 05/27/1997 | US5632856 Heating to reduce adhesion of plastic ink; pressing against adhesive to remove and fuse; peeling |
| 05/22/1997 | WO1997018037A1 A pair of co-operating refining elements intended for a disc refiner |
| 05/21/1997 | EP0774021A1 Machine for destructuring wood chips |
| 05/20/1997 | US5630909 Guide vane in a pin-rotor fluffer to aid in wood pulp mat retention by providing a cyclic lift; uniform bleaching |
| 05/14/1997 | EP0773317A1 Device and machine for the mechanical treatment of high consistency pulp |
| 05/13/1997 | CA2105176C Roller screen for screening bulk material, especially wood chips |
| 05/11/1997 | CA2189902A1 Device and treatment machine for the mechanical treatment of high-consistency fibrous material |
| 05/09/1997 | WO1997016590A1 A method and equipment for manufacturing predetermined low bark content wood chips and a high bark content fuel fraction from wood chips with bark attached |
| 05/07/1997 | EP0771237A1 Apparatus, system and method for treating process material such as waste material |
| 05/07/1997 | CN1149262A Process and apparatus for recycling disposable diapers |
| 05/06/1997 | US5626300 Disc refiner with conical ribbon feeder |
| 05/06/1997 | US5626297 Wood pulp ozone bleaching contactor |
| 05/02/1997 | EP0770151A1 The process for mechanical treatment of woody products, the product thus obtained and its use |
| 05/02/1997 | EP0683830B1 Method of preparing chemi-mechanical pulp |
| 05/02/1997 | EP0606250B1 A method and device for treating fibre material |
| 04/29/1997 | US5624616 Heating waste chips under steam and pressure to soften lignin, comminuting, drying |