| Patents for D21D 5 - Purification of the pulp suspension by mechanical means; Apparatus therefor (4,157) |
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| 03/18/1980 | US4193865 Classifying apparatus for a suspension |
| 02/26/1980 | US4190522 Apparatus for purifying a suspension of fibrous material |
| 02/12/1980 | US4188286 Screening apparatus for fiber suspensions |
| 01/15/1980 | CA1069858A1 Vortex cleaner with skewed or zig-zag heavies outlet |
| 12/11/1979 | CA1067834A1 Separator apparatus |
| 12/04/1979 | CA1067417A1 Screen with air cushion for stock suspensions |
| 11/20/1979 | US4175036 Hydrocyclone separator |
| 10/16/1979 | CA1064428A1 Stationary cylindrical screen for liquid suspensions including a heavy impurities trap and dilution means |
| 10/16/1979 | CA1064427A1 Stationary screen for paper fiber stock having screen sweeping agitators |
| 10/09/1979 | US4170457 Air separator method and apparatus |
| 10/09/1979 | CA1063974A1 Hydrocyclone system including axial feed and tangential transition sections |
| 09/11/1979 | US4167438 Method and apparatus for preparing and cleaning fibrous material |
| 08/28/1979 | US4166028 Apparatus for screening paper fiber stock |
| 08/28/1979 | US4165841 Apparatus for separating contaminants from fibrous suspensions |
| 08/28/1979 | CA1061289A1 Dual inlet with axial components for a hydrocyclone |
| 08/14/1979 | CA1060246A1 Air dome attenuator |
| 08/07/1979 | US4163719 Hydrocyclone separator arrangement |
| 07/03/1979 | CA1057671A1 Apparatus for processing liquid-containing substance mixtures, particularly cellulose pulp |
| 05/29/1979 | US4156485 Vortex cleaner |
| 05/29/1979 | CA1055291A1 Method of treating ligno-cellulose containing material |
| 05/22/1979 | US4155841 Removing rejects from papermaking suspension |
| 05/22/1979 | US4155839 Reverse centrifugal cleaning of paper making stock |
| 05/15/1979 | CA1054416A1 Method and apparatus for liberating the latent properties of a mechanical pulp |
| 05/08/1979 | US4153543 Fractionating apparatus |
| 04/24/1979 | CA1053184A1 Apparatus for eleminating specks from fibrous suspensions, especially in the reprocessing of mixed waste paper |
| 04/10/1979 | US4148722 Multiple hydrocyclone arrangement |
| 04/10/1979 | US4148721 Centrifugal cleaner apparatus and canister type arrangements thereof |
| 03/27/1979 | US4146469 Mounting of cleaners in papermaking system |
| 02/06/1979 | US4138338 Filter for thickening suspensions of fibrous material |
| 01/16/1979 | US4134827 Hydrocyclone separator |
| 12/26/1978 | CA1045083A1 Hydrocyclone |
| 11/28/1978 | US4127479 Apparatus for straining suspensions |
| 11/21/1978 | US4126542 Pressure drop device for fluid suspensions |
| 11/21/1978 | US4126513 Paper making machine screen |
| 09/05/1978 | US4111799 Stock screen foil |
| 09/05/1978 | US4111373 Apparatus for defibering conglomerates of fiber in fibrous suspensions, especially in the processing of mixed waste paper |
| 08/15/1978 | US4107033 Apparatus for cleaning fibrous suspensions of low stock consistency |
| 06/27/1978 | US4097374 Screening apparatus hydrofoil |
| 06/13/1978 | US4094794 Hydrocyclone |
| 01/31/1978 | US4071193 Method of and apparatus for flow spreading |
| 01/10/1978 | US4067800 For fibers in liquid suspensions |
| 08/23/1977 | US4043919 Pressure screen with turbulence chamber means |
| 08/16/1977 | US4042503 Classifier and process for recycled fiber separation |
| 04/12/1977 | US4017387 Screening apparatus |
| 03/15/1977 | US4012323 Separator apparatus |
| 12/28/1976 | US4000063 Apparatus for separating knots from pulp |
| 10/12/1976 | US3985005 Apparatus for processing liquid-containing substance mixtures, particularly cellulose pulp |
| 07/20/1976 | US3970548 Apparatus for screening paper fiber stock |
| 06/22/1976 | US3964996 Classifying unit for fibrous suspensions |
| 05/25/1976 | US3959150 Cyclone separator assembly |
| 05/04/1976 | US3954557 Web treatment |
| 04/27/1976 | US3953325 Pulp screen with rotating cleaning foil |
| 03/30/1976 | US3947314 Method of treating paper fibers in a stationary screen |
| 02/17/1976 | US3939065 Screening device |
| 02/10/1976 | US3937273 Forming non-woven fibrous material |
| 01/27/1976 | US3935109 Straining apparatus |
| 01/20/1976 | US3933649 Apparatus for purifying and fractionating particle suspensions |