| Patents for D21B 1 - Fibrous raw materials or their mechanical treatment (6,805) |
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| 07/14/1988 | WO1988005095A1 Method for treating a cellulose pulp with ozone |
| 07/13/1988 | EP0273915A1 Method of making mechanical pulp |
| 07/12/1988 | US4756799 Controlled steaming of lignocellulose material, impregnating with alkali and peroxide |
| 07/05/1988 | US4755286 Split flow `V` screen |
| 07/05/1988 | US4754935 Method and apparatus for refining fibrous material |
| 06/22/1988 | EP0271502A1 Grinding block for a refiner. |
| 06/22/1988 | CN87107426A Pressurized flotation modules and method for pressurized foam separation |
| 06/21/1988 | US4752039 Sealing bar for centrifugal grinders |
| 06/21/1988 | CA1238222A1 Method and apparatus for pre-treating lignocellulosic material in the continuous digestion of lignocellulosic material to cellulose pulp |
| 06/21/1988 | CA1238221A1 Foil arrangement for centrifugal grinder |
| 06/21/1988 | CA1238220A1 Method and apparatus for making fibre pulp |
| 06/16/1988 | DE3641141A1 Rotor for pulper |
| 06/15/1988 | EP0271427A2 Pressurized flotation module and method for pressurized foam separation |
| 06/14/1988 | US4751034 Adding sugar, furfural, or glycoside cross-linking agents and catalysts; pressurization |
| 06/14/1988 | CA1237929A1 Flotation apparatus for flotation of fibrous stock suspension recovered from waste paper |
| 06/07/1988 | US4749473 Slurrying, air blowing, absorption, froth removal |
| 05/26/1988 | DE3639200A1 Installation with a pulper |
| 05/19/1988 | WO1988003581A1 Method of making mechanical pulp |
| 05/19/1988 | WO1988003444A1 Apparatus for grading fibrous material |
| 05/19/1988 | DE3638408A1 Process for separating interfering materials and reusable accepted stocks, in particular usable fibres, from liquids containing added solids, and apparatus for carrying out the process |
| 05/11/1988 | EP0266582A1 Wood grinder |
| 05/10/1988 | US4743338 Method of removing air from lignocellulosic material by passing the material through conduit paths of different diameters |
| 05/10/1988 | US4742919 Rotating separator |
| 05/05/1988 | WO1988003189A1 Refiner |
| 04/27/1988 | EP0139633B1 Reactor to perform chemical reactions with dimensional reduction of solid materials |
| 04/19/1988 | US4738402 Waste recovery system |
| 04/12/1988 | US4737274 Tramp material separator |
| 04/12/1988 | CA1235013A1 Process for dry deinking of secondary fiber sources |
| 04/06/1988 | EP0263040A1 Process for bleaching lignocellulosic materials |
| 04/06/1988 | EP0262124A1 Rotating separator. |
| 04/05/1988 | US4735682 Repulping by agitation in aqueous alkaline solution; defibering; reuse; papermaking |
| 03/23/1988 | EP0261025A1 Process and apparatus for treating printed waste paper |
| 03/22/1988 | US4732552 Fiber processing apparatus having slotted outlets |
| 03/22/1988 | US4732336 Apparatus for treating cellulose pulp with intermeshing disks and asymmetrically pulp moving means |
| 03/22/1988 | US4732335 Apparatus for treating cellulose pulp with intermeshing disks and assymetrical pulp moving means |
| 03/22/1988 | EP0239583A4 Method of pretreating pulp with stabilizers and peroxide prior to mechanical refining. |
| 03/22/1988 | CA1234310A1 Flexible disk refiner and method |
| 03/08/1988 | US4729516 Fluff mill |
| 03/08/1988 | CA1233685A1 Method and device for manufacturing cellulose pulp |
| 03/02/1988 | CN87105652A Method of and means for hydrodynamic mixing |
| 02/24/1988 | EP0256965A2 Method of and means for hydrodynamic mixing |
| 02/23/1988 | US4726880 Method and apparatus for improving the quality of paper manufactured from recycled paper with a hydrokinetic amplifier |
| 02/16/1988 | US4725007 Apparatus for pulping high consistency paper making stock |
| 02/11/1988 | WO1988000992A1 Apparatus for treatment of fibre suspensions |
| 02/09/1988 | US4723718 Chip crushing surfaces |
| 02/09/1988 | US4723715 By liquid jet action |
| 02/04/1988 | DE3625369A1 Stock dissolver |
| 02/02/1988 | US4722784 Fiber suspensions; contaminants in froth on surface carried off |
| 01/27/1988 | CN87208909U Groove lines crumbling press |
| 01/26/1988 | US4721562 Aerating apparatus |
| 01/26/1988 | US4721231 Vessel for holding/discharging loose bulk material |
| 01/20/1988 | EP0252915A1 Method at the manufacture of mechanical pulp. |
| 01/19/1988 | US4719772 Apparatus for removing ink particles from paper products |
| 01/13/1988 | EP0252204A1 Machine for the dry defibering of fibrous cellulosic material and the like, particularly for preparing absorbent masses for disposable diapers and the like |
| 01/12/1988 | US4718980 Interstage treatment of mechanical pulp |
| 01/12/1988 | US4718611 Device for production of mechanical pulp |
| 01/05/1988 | CA1230996A1 Method and apparatus for manufacturing fibre pulp |
| 12/30/1987 | CN87102561A 旋转式分离器 Rotary separator |
| 12/29/1987 | US4715950 Vibratory separation apparatus |
| 12/29/1987 | CA1230709A1 Procedure for producing refined groundwood pulp |
| 12/22/1987 | CA1230512A1 Blocking slab for pulp grinder |
| 12/16/1987 | CN87102975A Disc screen improvement for chip screen efficiency |
| 12/15/1987 | CA1230208A1 Process for preparing pulp for paper making |
| 12/01/1987 | CA1229702A1 Methods of decontaminating secondary fiber |
| 11/24/1987 | US4708829 Apparatus for the removal of impurities from fiber suspensions |
| 11/24/1987 | US4708295 System for waste paper conditioning |
| 11/19/1987 | WO1987006963A1 Grinding block for a refiner |
| 11/19/1987 | WO1987006961A1 Method and device for slushing papermaking pulp |
| 11/11/1987 | EP0172818B1 Method and apparatus for making fibre pulp |
| 11/11/1987 | CN87103159A High density separator |
| 11/05/1987 | WO1987006506A1 High density separator |
| 11/05/1987 | WO1987006505A1 Disk screen improvement for chip screening efficiency |
| 11/03/1987 | US4704201 Waste paper processing system |
| 11/03/1987 | US4703860 Disk screen with decreasing size of slot openings, and method |
| 11/03/1987 | CA1228762A1 Pulping apparatus and method |
| 10/22/1987 | WO1987006280A1 Method of reducing the energy consumption at the refining of cellulose-containing material |
| 10/22/1987 | WO1987006279A1 Rotating separator |
| 10/22/1987 | DE3710967A1 Disintegrating apparatus |
| 10/21/1987 | CN86106458A Cotton stalk crusher |
| 10/20/1987 | US4700900 Two stage refiner |
| 10/20/1987 | CA1228256A1 Process for preparing groundwood pulp as short fiber and long fiber fractions |
| 10/13/1987 | US4699691 Pulping; papermaking |
| 10/08/1987 | WO1987005954A1 Method of processing mechanical pulp |
| 10/08/1987 | DE3701400A1 Sorting device for fibre suspensions |
| 10/07/1987 | EP0239583A1 Method of pretreating pulp with stabilizers and peroxide prior to mechanical refining. |
| 10/06/1987 | US4698257 Wet-end molded product |
| 10/06/1987 | US4698077 Separating apparatus |
| 10/06/1987 | CA1227680A1 Apparatus for treating a fibrous material |
| 09/29/1987 | CA1227366A1 Frame construction for a pressure grinding machine of press type |
| 09/15/1987 | CA1226754A1 Breaker |
| 09/15/1987 | CA1226705A1 Chemithermomechanical pulping process employing separate alkali and sulfite treatments |
| 09/11/1987 | WO1987005346A1 High temperature, high consistency bleaching |
| 09/09/1987 | EP0235605A2 Screening apparatus for paper pulp |
| 08/26/1987 | EP0233517A2 Process and apparatus for deinking paper pulp obtained from waste paper |
| 08/25/1987 | US4689143 Fibers from fines in an air flow |
| 08/25/1987 | US4689117 Thermomechanical digestion process for enhancing the brightness of cellulose pulp using bleachants |
| 08/25/1987 | US4688725 Method for regulation of grinding process in a pocket grinder |
| 08/18/1987 | US4687146 Apparatus for fiberizing and screening of fibrous materials |
| 08/11/1987 | CA1225369A1 Rotor with separate clearing and propelling blades in a turbulence relieved pulp screen |
| 08/05/1987 | EP0230422A1 Rotor/mixer for controlling mixing and refining of pulp material. |