| Patents for D21B 1 - Fibrous raw materials or their mechanical treatment (6,805) |
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| 03/02/1994 | EP0536171B1 Integrated pulp mill and method of constructing same |
| 03/02/1994 | CN1082948A Bagasse depither |
| 03/01/1994 | US5290401 Method and a device for separating plastic particles from supensions |
| 02/15/1994 | CA1326942C Ozone treatment of cellulose pulp |
| 02/09/1994 | EP0582042A1 Process for modifying the properties of deinked waste paper pulps, especially the fiber classification and installation for carrying out the process |
| 02/08/1994 | US5284251 Tension bar screen |
| 02/03/1994 | WO1994002680A1 Hydrocyclone photo-reactor |
| 02/03/1994 | WO1994002261A1 Tension bar screen |
| 02/02/1994 | EP0581631A1 Selective treatment of pulp with ozone |
| 02/02/1994 | CN1081484A Method for producing a delignified papermaking fiber from recycled, high lignin content, waste paper and product thereof |
| 02/01/1994 | CA2101188A1 Selective treatment of pulp with ozone |
| 01/26/1994 | EP0580087A1 Process for reusing waste paper |
| 01/26/1994 | EP0579601A1 Method and apparatus for removing ink from waste paper material |
| 01/26/1994 | CN2154282Y Coarse fibre grinder |
| 01/24/1994 | CA2101225A1 Wastepaper treatment method |
| 01/19/1994 | EP0579001A1 Waste paper processing |
| 01/18/1994 | US5279424 Floatation apparatus for removal of distrubing substances, especially printing ink from waste paper suspensions |
| 01/18/1994 | CA2100741A1 Method for waste paper treatment |
| 01/13/1994 | DE4236354C1 Used paper recycling - reduces swollen paper to a homogeneous mass for calendering within a cylindrical housing |
| 01/12/1994 | EP0577621A1 Refiner. |
| 01/12/1994 | EP0239583B2 Method of pretreating pulp with stabilizers and peroxide prior to mechanical refining |
| 01/11/1994 | US5277758 Method for recycling plastic coated paper product waste and polymeric film |
| 01/11/1994 | US5277371 Multi pin rotor fiber fluff generator |
| 01/11/1994 | CA1325868C Process for bleaching mechanical wood pulp |
| 01/06/1994 | WO1994000632A1 Waste paper disintegration, classification and pulping system |
| 01/06/1994 | WO1994000227A1 Device for admixing a processing agent to a pulp suspension |
| 01/06/1994 | CA2135900A1 Device for admixing a processing agent to a pulp suspension |
| 01/05/1994 | EP0576437A1 A roller screen for screening bulk material, especially wood chips. |
| 01/05/1994 | DE4317974A1 Paper shredder for commercial recycling - has shaft with toothed discs to grind paper, press arms at opposite sidewalls of shredder chamber, etc. |
| 01/05/1994 | DE4221028A1 Used paper recycling |
| 12/28/1993 | US5273624 Pressurized flotation module and method for pressurized foam separation |
| 12/23/1993 | WO1993025324A1 A method for manufacturing low bark content wood chips from whole-tree chips |
| 12/22/1993 | CN1079784A Fibre separating machine |
| 12/22/1993 | CN1079783A Fibre separating machine |
| 12/22/1993 | CN1079782A Fibre separating machine |
| 12/21/1993 | US5271805 Method and apparatus for waste paper treatment |
| 12/15/1993 | EP0573497A1 Recycling waste cellulosic material. |
| 12/15/1993 | EP0493422B1 Improved plug screw feeder |
| 12/15/1993 | EP0489066B1 Process for the re-treatment of mechanical wood pulp |
| 12/08/1993 | EP0572388A1 Ctmp-process. |
| 12/07/1993 | US5268074 Method for recycling polymeric film |
| 11/30/1993 | US5266161 Bagasse depither |
| 11/25/1993 | WO1993023166A1 Apparatus for refining fiber material |
| 11/25/1993 | CA2133201A1 Apparatus for refining fiber material |
| 11/24/1993 | EP0570757A1 Method and apparatus for separating paper fiber and plastics from mixed waste materials and products obtained thereby |
| 11/24/1993 | EP0570644A1 Screenless disk mill |
| 11/23/1993 | US5263774 Rotor for increasing mixing efficiency in a medium consistency mixer |
| 11/23/1993 | US5263651 Safety device for chip conditioning device |
| 11/18/1993 | EP0569452A1 Method and apparatus for grading fibrous material |
| 11/18/1993 | DE4321521A1 Waste paper processing removing large proportion of wax content - by decomposing waste paper in pulp dissolver, precleaning, opt. diluting with water and floating suspension to separate wax |
| 11/18/1993 | DE4215532A1 Used paper recycling |
| 11/16/1993 | US5262004 Method of extracting chemical preservatives from treated wood |
| 11/16/1993 | US5262003 Method and system for defibering paper making materials |
| 11/10/1993 | CN1078276A Method for prodn. of printing paper pulp made from all cotton stalk by hot mechanical grinding |
| 11/09/1993 | US5259969 For reuse of waste paper, solvents, nonionic and anionic surfactants, water |
| 11/09/1993 | CA2068243A1 Device for holding arcuate plate segments end-to-end in a circular configuration |
| 11/09/1993 | CA1324033C Method and apparatus for pumping high-consistency fiber suspension |
| 11/09/1993 | CA1324019C Control valve for fiberizing wastepaper |
| 11/07/1993 | CA2086355A1 Screenless disk mill |
| 11/03/1993 | EP0568404A1 Method of treating papermaking fibers for making tissue |
| 10/28/1993 | DE4318431A1 Processing used fluid cartons - involves drying followed by thermic treatment over specific period |
| 10/26/1993 | CA1323600C Grooved spacer for disc screen wood chip sorter |
| 10/20/1993 | EP0566284A2 Method for producing a delignified papermaking fiber from recycled, high lignin content, waste paper and product thereof |
| 10/19/1993 | US5253815 Fiberizing apparatus |
| 10/19/1993 | CA1323333C Method and apparatus for sorting wood chips |
| 10/19/1993 | CA1323332C Color sorting of lumber |
| 10/18/1993 | CA2076731A1 Method of treating papermaking fibers for throughdried tissue |
| 10/14/1993 | CA2065939A1 Steam explosion pulping process for annual plants papermaking |
| 10/13/1993 | EP0335916B1 Extruder and process for manufacture of easy-to-handle moulded parts made of paper waste |
| 10/13/1993 | CN1077239A Method for manufacture of furniture by mould pressing fiber |
| 10/13/1993 | CN1077119A Pharyngitis mouth-sucking tablet and preparation thereof |
| 10/12/1993 | CA1322838C Ductless webber |
| 10/07/1993 | CA2234143A1 Blade-coated paper and method of preparation thereof |
| 10/01/1993 | CA2090665A1 Delumper |
| 09/30/1993 | WO1993019244A1 Baled waste paper pre-recycling treatment |
| 09/30/1993 | DE4314505A1 Waste paper pulp dirt and debris extn. pig tail cutting assembly for wear redn. - comprises two clamps to hold and grip pig tail at separate points for cutting with clamp at end of pig tail contg. rotary holder to retain and twist pig tail |
| 09/30/1993 | CA2132322A1 Baled waste paper pre-recycling treatment |
| 09/29/1993 | CN1076743A Method for making pulp of newsprint and book paper by shattering cotton-rod, removing black bark and pith |
| 09/23/1993 | DE4306936A1 Waste paper processing - using container to breakdown material by heat and pressure followed by dilution and sorting in rotating drum with perforated mantle |
| 09/21/1993 | US5246116 Method and apparatus for separation and recovery of the components from foil-containing laminates |
| 09/21/1993 | CA1322304C Method and device for indicating the contact position in a refiner |
| 09/20/1993 | CA2063547A1 Steam explosion pulping process for papermaking |
| 09/16/1993 | WO1993018227A1 Process for making board |
| 09/16/1993 | WO1993017782A1 Varying annular fluidization zone for increased mixing efficiency in a medium consistency mixer |
| 09/16/1993 | CA2131525A1 Process for making board |
| 09/16/1993 | CA2131461A1 Varying annular fluidization zone for increased mixing efficiency in a medium consistency mixer |
| 09/15/1993 | EP0413736B1 Method of making mechanical and chemi-mechanical papermaking pulp |
| 09/09/1993 | DE4207060A1 Self-adhesive paper waste disposal - comprises treating adhesive side of paper to indicate the adhesive matrix or covering with material e.g. polyethylene@ film, eliminates special disposal requirements |
| 09/09/1993 | DE4206748A1 Used paper recycling |
| 09/08/1993 | EP0558908A1 Process and treatment of waste paper |
| 09/08/1993 | EP0558512A1 Treatment of absorbent sanitary paper products. |
| 09/07/1993 | US5242585 Apparatus and method for deinking waste paper pulp |
| 09/07/1993 | CA1321915C Cyclical impregnation during mechanical pulping |
| 09/05/1993 | CA2090987A1 Process for recycling waste paper |
| 09/02/1993 | DE4206206A1 Waste paper recycling - uses electrolyte and foaming to develop a flocculant to remove dirt as a scum from the surface of processing water |
| 08/31/1993 | US5240621 Centrifuging |
| 08/26/1993 | DE4204915A1 Reprocessing waste paper - in presence of peroxide(s) with mixts. of polyfunctional carboxylic acids and polymeric cpds. as flotation stabilisers |
| 08/24/1993 | US5238538 Slurrying fiber pulp in water, applying continuous direct current electric field, allowing ink to float to surface, removing ink |
| 08/19/1993 | DE4304128A1 Grinding wheel with replaceable ceramic abrasive elements - which are retained by concrete adhesive element and metal plate |
| 08/18/1993 | EP0555378A1 Fiberizing apparatus |