| Patents for D21D 5 - Purification of the pulp suspension by mechanical means; Apparatus therefor (4,157) |
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| 08/03/1993 | US5232552 Screening device |
| 07/14/1993 | CN1021549C Taper deslagging unit and mfg. method |
| 07/06/1993 | US5224603 Apparatus for treating fiber suspension |
| 07/06/1993 | CA1319847C Means and method for removal of strings from wastepaper pulp |
| 06/24/1993 | DE4141865A1 Paper machine mfg. appts. - is a vertical cylinder container with vertical stirring shaft moved forwards and back by a motor |
| 06/22/1993 | US5221476 Hydrocyclone conduits |
| 06/22/1993 | US5221437 Screening apparatus for paper making stock |
| 06/15/1993 | US5219472 Method of treating a fiber suspension |
| 06/15/1993 | US5219076 Rapidly rotating disk; radial ejection of energetic particles; retention of less energetic on surface of rim |
| 06/10/1993 | WO1993010908A1 Hydrocyclone with turbulence creating means |
| 06/08/1993 | CA1318865C Stabilizing pressure and flow conditions in a screening apparatus |
| 06/02/1993 | EP0543866A1 Method and apparatus for stabilizing and simplifying an approach flow system for a paper-making machine. |
| 06/02/1993 | EP0543852A1 A method and apparatus for improving the treatment of a gas containing fiber suspension |
| 06/01/1993 | US5215559 Device for separating fibres and gas |
| 05/27/1993 | CA2066462A1 Paper material screening/refining apparatus |
| 05/26/1993 | EP0542835A1 Method and apparatus for improving flotation separation |
| 05/25/1993 | CA1318283C Method and apparatus for treating fiber suspension |
| 05/25/1993 | CA1318282C Method and apparatus for grading fiber suspension |
| 05/19/1993 | EP0541979A1 Screening apparatus |
| 05/19/1993 | EP0541655A1 A device for separating suspensions, preferably containing fibre pulp. |
| 05/19/1993 | DE4237151A1 Paper suspension sieve assembly - has drum rotors within sieve bodies contained in a cylindrical housing |
| 05/13/1993 | WO1993009059A1 Liquid reservoir |
| 05/13/1993 | DE4136765A1 Separator centrifuge - has large filter design to avoid pulsation |
| 05/11/1993 | US5209641 Apparatus for fluidizing, degassing and pumping a suspension of fibrous cellulose material |
| 04/20/1993 | CA1316397C Centrifugal pump |
| 04/20/1993 | CA1316386C High-consistency pulp tower and method of discharging pulp from the tower |
| 04/15/1993 | WO1993007334A1 Method of manufacturing a screen product and a screen product manufactured by the method |
| 04/15/1993 | CA2120250A1 Method of manufacturing a screen product and a screen product manufactured by the method |
| 04/14/1993 | CN1070837A Screen with surface having projections or depressions |
| 04/13/1993 | US5201423 Fiber suspensions sorter having a plurality of screen baskets |
| 04/13/1993 | CA1316145C Two stage rotary pulp screening device |
| 04/06/1993 | US5200072 Screen plates and methods of manufacture |
| 03/24/1993 | EP0533349A1 Separator screen |
| 03/18/1993 | WO1993004757A1 Process for separating gaseous components from pourable media and device and installation therefor |
| 03/17/1993 | EP0531392A1 Screening device. |
| 03/15/1993 | WO1993004797A1 A method of manufacturing a screening drum |
| 03/15/1993 | CA2117077A1 A method of manufacturing a screening drum |
| 03/09/1993 | US5192454 Disc-type pulp treatment |
| 03/09/1993 | US5192438 Rotating element for screening apparatus with a contour surface produced by a plurality of protrusions in the direction of the axial length of the rotor |
| 03/09/1993 | US5192397 Cyclone separators for cleaning pulp suspensions |
| 03/03/1993 | EP0529548A1 Screen apparatus for paper making |
| 03/02/1993 | US5190160 Method and apparatus for enhancing transport of knots in a knot drainer |
| 03/02/1993 | CA1313967C Double diffuser with backflush pistons |
| 03/02/1993 | CA1313966C Method for fractionating mixed pulp according to the fiber properties |
| 02/24/1993 | EP0527893A1 Hydrocyclone assembly. |
| 02/24/1993 | EP0527884A1 Hydrocyclone plant. |
| 02/23/1993 | US5187956 Preventing clogging in pressure diffusers |
| 02/18/1993 | WO1993003220A1 Method and apparatus for an improved knot drainer |
| 02/16/1993 | US5186823 Hydrocylone apparatus for separating dense particles from a flowing liquid |
| 02/16/1993 | US5186726 Low pressure expansion removes air, then condensing cooled vapor and absorbing it in heat exchanging liquid |
| 02/16/1993 | US5186332 Paper stock screening apparatus having heavy rejects trap |
| 02/16/1993 | CA1313600C Paper material refining apparatus |
| 02/04/1993 | WO1993001875A1 Method and apparatus for separating gas from a gaseous material |
| 02/02/1993 | US5183536 Cellulose |
| 02/02/1993 | CA1313324C Method and apparatus for thickening fiber suspension |
| 01/26/1993 | US5182031 Process and device for deaeration of liquids |
| 01/20/1993 | EP0523313A1 Element for screen |
| 01/13/1993 | EP0522378A1 Pressure sorter |
| 01/07/1993 | EP0521192A1 Element for screen |
| 01/05/1993 | US5176261 Rotor for pressure sorters for sorting fibrous suspensions |
| 01/05/1993 | CA1312292C Filtering bag and filter |
| 01/03/1993 | CA2072776A1 Screen element |
| 12/30/1992 | CN1067462A Ammonium sulfite process for production of cotton pulp |
| 12/22/1992 | US5173177 Anti-plugging adjustable orifice for gas sparged hydrocyclone |
| 12/22/1992 | US5172813 Method and an apparatus for treating fiber suspension |
| 12/02/1992 | EP0515530A1 Apparatus for filtering liquids. |
| 12/02/1992 | EP0515502A1 Apparatus for filtering liquids. |
| 12/02/1992 | EP0515492A1 An apparatus for filtering suspensions and a method of operating the apparatus. |
| 11/17/1992 | CA1310216C Dual inlet impregnation for mechanical pulping |
| 11/11/1992 | EP0512873A1 End ring for a cylindrical screen for straining and classifying paper pulp and method for making the same |
| 11/10/1992 | CA1309978C Sorting apparatus for fiber suspensions |
| 10/21/1992 | EP0509909A1 Screen for hydrodynamically straining or classifying paper pulp |
| 10/21/1992 | EP0509873A1 Slotted screen drum for straining paper pulp and method for making the same |
| 10/21/1992 | EP0509561A2 Method and apparatus for treating fiber suspension |
| 10/21/1992 | EP0509004A1 Screen plate for screening pulp. |
| 10/14/1992 | CN2118747U Taper type trash remover of glass fibre reinforced plastic |
| 10/08/1992 | DE4111120A1 Granular mixture separation machine - supplies water to sifting drum casing on inside after mixture feed system |
| 10/07/1992 | CN1065110A Sieve plate machining method |
| 10/06/1992 | CA1308290C Backflushing pressure diffuser screens |
| 09/28/1992 | CA2057409A1 Anti-plugging adjustable orifice for gas sparged hydrocyclone |
| 09/23/1992 | EP0504161A1 Basket profile for screens. |
| 09/17/1992 | DE4107905A1 Cylindrical sieve mfg. - applies ribs to flat material with slits outside the ribs before bending into cylinder |
| 09/15/1992 | US5147543 Rotating element for a screening apparatus with a contour surface produced by a plurality of protrusions in the direction of the axial length of the cylindrical rotor |
| 09/15/1992 | US5147504 Screening and defibering pulp, paper industry |
| 09/08/1992 | US5145072 Method for screening and treating pulp |
| 09/02/1992 | EP0501144A1 Equipment to ventilate a paper stock suspension and its application |
| 09/02/1992 | EP0501134A1 Cleaner for stock suspensions |
| 09/01/1992 | US5143220 Apparatus for screening to remove knots from a fluid borne slurry of fibers and knots |
| 08/25/1992 | US5141535 Apparatus for separating gas from a suspension |
| 08/19/1992 | EP0499154A1 Screen drum |
| 08/19/1992 | EP0498822A1 Pulseless screen. |
| 08/18/1992 | US5139652 Centrifugal cleaner |
| 08/18/1992 | US5139154 Wear screen plate and method of manufacture thereof |
| 08/05/1992 | CN2111794U Rubber plastic ceramic slag remover |
| 07/28/1992 | US5133832 Process and system for preparation of waste paper stock with short and long fiber fractionation |
| 07/21/1992 | US5131980 Hydrocyclone removal of sticky contaminants during paper recycling |
| 07/21/1992 | US5131544 Device for selectively separating particles in a liquid, in particular for cleaning fibrous paper suspensing |
| 07/14/1992 | US5129119 Diffuser efficiency |
| 07/09/1992 | WO1992011410A1 High consistency foil |
| 07/08/1992 | EP0493950A2 Centrifugal cleaner |