| Patents for D21B 1 - Fibrous raw materials or their mechanical treatment (6,805) |
|---|
| 08/02/1989 | CN2042087U High-efficiency straw-pulp machine |
| 07/27/1989 | WO1989006717A1 Method of making mechanical pulp |
| 07/27/1989 | WO1989006488A1 Process and installation for making a product for use as a cultivation support |
| 07/26/1989 | EP0325554A2 Automatic chip classifier and system |
| 07/19/1989 | EP0324689A1 Process, product and equipment for manufacturing said product serving as a culture substrate |
| 07/19/1989 | CN2041321U High-efficiency wood pulper |
| 07/18/1989 | US4849053 Peroxide bleaching, papermaking |
| 07/18/1989 | US4848674 Diverting fluid flow decreasing velocity, separation of particles |
| 07/13/1989 | WO1989006293A1 Method and device for crushing a fibrous material |
| 06/29/1989 | WO1989005692A1 An apparatus for shredding fibrous materials such as straw or paper |
| 06/28/1989 | EP0321665A1 Pulper with high pulping efficiency |
| 06/28/1989 | CN2040029U Documents processing appliance |
| 06/22/1989 | DE3741804A1 Method for controlling a wood grinder |
| 06/20/1989 | US4840317 Wood pulp grinder |
| 06/15/1989 | WO1989005374A1 Method and apparatus for manufacturing pulp |
| 06/13/1989 | US4838301 Draining valve for waste paper processing appliances |
| 06/13/1989 | CA1255816A1 Device at flotation of fibre suspensions |
| 06/13/1989 | CA1255530A1 Feeding device for feeding a wood batch into a pressure grinder |
| 06/07/1989 | EP0318495A1 Apparatus for treatment of fibre suspensions. |
| 05/24/1989 | EP0230422B1 Rotor/mixer for controlling mixing and refining of pulp material |
| 05/18/1989 | WO1989004394A1 Method and plant for producing high-grade pulp from chip material containing lignocellulose |
| 05/18/1989 | DE3837766A1 Apparatus for the comminution or grinding of fibre material, especially drum refiner |
| 05/18/1989 | DE3837757A1 Apparatus for comminuting or grinding fibrous material, in particular drum refiner |
| 05/05/1989 | WO1989003910A1 Interstage treatment of mechanical pulp |
| 04/25/1989 | CA1253119A1 Apparatus for the separation of edge trimmings |
| 04/19/1989 | EP0202237B1 A process for manufacturing a liquid absorbing pad, in particular for use in soft hygiene articles and sanitary products |
| 04/19/1989 | CN2036189U Waste paper decolouration and flotation machine |
| 04/18/1989 | CA1252665A1 Method and apparatus for the thermo-mechanical pulping of wood |
| 04/12/1989 | EP0310947A2 Device for crushing, washing, draining, separating and drying polluted material |
| 04/11/1989 | US4820980 Gap, wear and tram measurement system and method for grinding machines |
| 04/06/1989 | WO1989002951A1 Method of impregnating lignocellulose material |
| 04/06/1989 | WO1989002783A1 Method and device for indicating the contact position in a refiner |
| 04/04/1989 | US4818339 Discharging into large vat where it is stirred by an agitator equipped with spiral arms |
| 04/04/1989 | US4818338 Method for emptying suspension for a pulper |
| 03/29/1989 | CN2034870U Straw skin and pith separator |
| 03/28/1989 | US4816117 Impregnation, decomposition in storage tank, high consistency stock method |
| 03/14/1989 | US4812206 Process for bleaching lignocellulosic matter |
| 03/14/1989 | US4812205 For preparing papermaking pulp |
| 03/09/1989 | DE3733649A1 Method and apparatus for disintegrating, washing, dewatering, separating and drying soiled material |
| 03/08/1989 | EP0305782A2 Method of and plant for recovering useful products from a mixture of solid waste |
| 03/08/1989 | EP0305659A1 Process for regulating specific dispersion power |
| 02/28/1989 | US4808263 Method for fiberizing wastepaper using an inline control valve for make-up air |
| 02/15/1989 | CN1031121A Pulp material and its processing method |
| 02/14/1989 | US4804439 Means and method for removal of strings from waste paper |
| 02/09/1989 | WO1989000893A1 Split flow ''v'' screen |
| 02/09/1989 | DE3824569A1 Apparatus for the production of a fibre web |
| 02/08/1989 | EP0302075A1 Method of reducing the energy consumption at the refining of cellulose-containing material |
| 02/07/1989 | US4802591 Louvered chip screener |
| 02/01/1989 | EP0301996A2 Chip slicer improvement |
| 01/31/1989 | US4801099 Pulp refining apparatus |
| 01/26/1989 | WO1989000624A1 Method and apparatus for controlling the production of refined stock |
| 01/18/1989 | CN1030451A 改进的聚乙烯浆粕 Improved polyethylene pulp |
| 01/17/1989 | US4798651 Process for preparing pulp for paper making |
| 01/10/1989 | US4796818 Chip slicer improvement |
| 01/04/1989 | EP0297464A2 Method and apparatus for pumping high consistency fiber suspension |
| 01/03/1989 | CA1247909A1 Apparatus for dissolving and sorting waste paper |
| 12/28/1988 | EP0211834B1 Aeration installation |
| 12/28/1988 | CA1247584A Method and apparatus for fiberizing fibrous sheet |
| 12/21/1988 | EP0295239A1 Disk screen improvement for chip screening efficiency. |
| 12/13/1988 | CA1246375A1 Disintegration of wood |
| 12/13/1988 | CA1246374A1 Two stage high consistency refiner |
| 12/06/1988 | US4789429 Method of making mechanical pulp |
| 12/06/1988 | US4789068 Wood chip classifying system |
| 12/06/1988 | CA1246012A1 Vertically spaced eccentric weight agitators in a multi-deck classifier |
| 11/29/1988 | CA1245498A1 Rotor/mixer for controlling mixing and refining of pulp material |
| 11/23/1988 | EP0292285A1 Polyethylene pulp |
| 11/17/1988 | WO1988008957A1 Gap, wear and tram measurement system and method for grinding machines |
| 11/17/1988 | EP0291142A1 A method of obtaining usable fibrous material with the aid of micro-organisms from paper and particularly laminated paper |
| 11/17/1988 | DE3714624A1 Schneckenpresse sowie verfahren zur herstellung von handhabbaren presslingen aus abfallpapier Screw press and process for production of manageable press lingen from waste paper |
| 11/15/1988 | US4784764 Arrangement for the flocculation of flocculatable substances in suspensions, particularly for the purification of the backwater of deinking installations for waste paper processing |
| 11/15/1988 | US4784761 Drum screen |
| 11/15/1988 | CA1244698A1 Apparatus for dry defibration of sheets of fibrous cellulose material and like materials |
| 11/10/1988 | DE3813371A1 Method and arrangement for the elimination of latency |
| 11/03/1988 | WO1988008466A1 Extruder and process for manufacture of easy-to-handle moulded parts made of paper waste |
| 11/02/1988 | EP0289015A1 Screw press and method for transforming waste paper into manageable objects |
| 10/26/1988 | EP0190130B1 Device at flotation of fibre suspensions |
| 10/25/1988 | US4780179 Method for producing pulp from printed unselected waste paper |
| 10/20/1988 | WO1988008050A1 Method and device at manufacture of fibre pulp |
| 10/20/1988 | WO1988007988A1 Porphyrins, their syntheses and uses thereof |
| 10/19/1988 | CN87101324A Pulpifying technology and its fabricative equipments for making high strength corrugated raw paper with cotton fagot by means of imine method |
| 10/11/1988 | US4776926 Thinning, agitation, separation into fine and long fiber fractions of varying freeness |
| 10/05/1988 | EP0285011A2 Crushing apparatus |
| 09/28/1988 | EP0284585A2 Improved process for preparing pulp for paper making |
| 09/28/1988 | EP0284526A1 Process and plant for recycling waste printed papers |
| 09/27/1988 | US4773965 Strong and clean sulfite pulp and method of making same |
| 09/27/1988 | US4773602 Comminuting device |
| 09/27/1988 | CA1242346A1 Apparatus for pulping paper |
| 08/30/1988 | US4767499 Method for the production of fiber pulp by impregnating lignocellulosic material with a sulphonating agent prior to refining |
| 08/24/1988 | EP0279022A1 Process and installation for pulping paper stock |
| 08/16/1988 | US4764022 Kneader for paper products and/or similar waste products |
| 08/16/1988 | CA1240456A1 Mechanical pulping |
| 08/10/1988 | EP0277866A1 Discharge valve for old paper treatment apparatuses |
| 08/10/1988 | CN87212791U A hydraulic pulper |
| 08/09/1988 | CA1240191A1 Composite flexible pulp refiner disk and method of making the same |
| 08/03/1988 | EP0276608A1 Process for treating a paper slurry with ozone |
| 08/02/1988 | US4760717 Washing machine for washing off or separating plastic film from paper or cellulose fibers or other pollutants and method relating thereto |
| 08/02/1988 | CA1239904A1 Solid waste processing |
| 08/02/1988 | CA1239824A1 Pressure-assisted centrifugal grinding |
| 07/27/1988 | EP0275849A1 Means for dispersing paper, cardboard and pulp |
| 07/27/1988 | EP0275848A1 Means for dispersing paper, cardboard and pulp |