| Patents for D21D 5 - Purification of the pulp suspension by mechanical means; Apparatus therefor (4,157) |
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| 07/08/1992 | EP0493715A1 Process for treating waste paper |
| 07/07/1992 | US5128028 Sieve for paper pulp strainer and classifier |
| 06/30/1992 | US5126039 Device for the fractionation of pulp |
| 06/24/1992 | EP0491111A1 Atmospheric diffuser improved lower screens backflushing |
| 06/24/1992 | CN1017170B Wave screen plate and manufacturing method |
| 06/23/1992 | US5124029 Method of and device for fractionating suspensions |
| 06/18/1992 | CA2045005A1 Atmospheric diffuser improved lower screens backflushing |
| 06/17/1992 | CN2107484U Profile sieve plate |
| 06/16/1992 | CA1303400C Apparatus for treatment of fibre suspensions |
| 06/11/1992 | WO1992009372A1 Hydrocyclone plant |
| 06/11/1992 | WO1992009371A1 Hydrocyclone plant |
| 06/10/1992 | CN2106850U Compound paper pulp dregs remover |
| 06/09/1992 | US5119953 Pulp suspension screening and fractionation apparatus |
| 06/09/1992 | CA1302764C Method of preparing a pumpable slurry |
| 05/27/1992 | EP0487224A1 Screening apparatus for paper making stock |
| 05/27/1992 | EP0486905A1 Sorter |
| 05/27/1992 | EP0486631A1 A method and a device for separating plastic particles from suspensions |
| 05/26/1992 | US5116488 Gas sparged centrifugal device |
| 05/26/1992 | US5116476 Atmospheric diffuser improved lower screens backflushing |
| 05/23/1992 | CA2056050A1 Sorter |
| 05/20/1992 | EP0486209A1 Screening apparatus for paper making stock |
| 05/20/1992 | CA2055025A1 Screening apparatus for paper making stock |
| 05/19/1992 | US5114536 Cleaning fibers of recycled paper |
| 05/13/1992 | EP0485153A1 Apparatus for screening to remove knots from a fluid borne slurry of fibres and knots |
| 05/13/1992 | CN2104239U Reciprocating starch mill |
| 05/12/1992 | US5112444 Method for treating pulp |
| 05/05/1992 | US5110456 High consistency pressure screen and method of separating accepts and rejects |
| 04/30/1992 | WO1992007137A1 Method of pulping waste pressure-sensitive adhesive paper |
| 04/21/1992 | US5106456 Rotor arranged in high consistency pulp-containiung space for homogenizing and facilitating flow |
| 04/14/1992 | US5104522 Spray fractionation disks and method of using the same |
| 04/08/1992 | EP0479203A1 Pulper for paper making |
| 04/08/1992 | EP0478762A1 Method and device for separating a fibre suspension. |
| 04/07/1992 | US5102532 Method for controlling pressurized screening devices and pressurized screening device |
| 04/01/1992 | EP0478228A1 Method and apparatus for the discharge of gas from a liquid solids mixture |
| 03/25/1992 | EP0475985A1 Method of and apparatus for separating heavy impurities from fiber suspensions in connection with pumping. |
| 03/17/1992 | US5096587 Hydrocyclone conduit |
| 03/17/1992 | US5096127 Apparatus for pressurized screening of a fibrous material liquid suspension |
| 03/10/1992 | US5094674 Device for separation of air from flotation slush |
| 03/10/1992 | US5094360 Screen basket |
| 03/05/1992 | WO1992003611A1 Method and apparatus for decreasing problems caused by residual or reaction gases or gases harmful to a process |
| 03/05/1992 | WO1992003610A1 Method and apparatus for treating a gas containing aqueous fiber suspension |
| 03/05/1992 | WO1992003229A1 Method and apparatus for improving flotation separation |
| 03/04/1992 | EP0473566A2 Gas sparged hydrocyclone |
| 03/04/1992 | EP0473354A1 Apparatus for pressurised screening of a fibrous material liquid suspension |
| 03/03/1992 | CA1296674C Tramp material separator |
| 03/01/1992 | CA2042631A1 Gas sparged centrifugal device |
| 02/25/1992 | US5090721 Process for manufacturing a screen basket and screen basket made by this process |
| 02/19/1992 | EP0471195A1 Screen plates and methods of manufacture |
| 02/19/1992 | CN2096578U Paper machine and equipment for reclaimed waste paper |
| 02/15/1992 | WO1992003613A1 Method and apparatus for stabilizing and simplifying an approach flow system for a paper-making machine |
| 02/15/1992 | WO1992003612A1 A method and apparatus for improving the treatment of a gas containing fiber suspension |
| 02/15/1992 | CA2089076A1 Method and apparatus for improving the treatment of a gas containing fiber suspension |
| 02/12/1992 | EP0470946A1 Hydrocyclone deinking and removal of sticky contaminants during paper recycling |
| 02/11/1992 | US5087171 Paper pulp centrifugal pump with gas separation |
| 02/10/1992 | CA2044383A1 Hydrocyclone deinking and removal of sticky contaminants during paper recycling |
| 02/01/1992 | CA2048126A1 Hydrocyclone conduit |
| 01/29/1992 | CN2094571U Screen net |
| 01/28/1992 | WO1992002676A1 A device for separating suspensions, preferably containing fibre pulp |
| 01/28/1992 | US5084161 Method and apparatus for the removal of light material from a fiber suspension |
| 01/28/1992 | CA2086938A1 Device for separating suspensions, preferably containing fibre pulp |
| 01/22/1992 | EP0466798A1 Device for separating fibres and gas |
| 01/22/1992 | EP0466755A1 Sectional screen cylinder. |
| 01/08/1992 | EP0465312A1 Screening apparatus for a mixture of paper pulp and contaminants |
| 01/07/1992 | US5078878 Pressure knotter screening apparatus |
| 01/07/1992 | US5078859 Stock screening apparatus |
| 01/07/1992 | US5078549 Hydrocyclone |
| 01/07/1992 | US5078275 Screening apparatus for paper making stock |
| 12/26/1991 | WO1991019852A1 Screening unit for the screening of pulp, especially paper pulp |
| 12/24/1991 | US5075001 Method and apparatus for recovering fibrous material from a paper/pulp process water stream |
| 12/24/1991 | US5074995 Apparatus for separating particles from a pulp flow and dividing the flow into fractions |
| 12/24/1991 | CA1293403C2 Pressure pulp washer |
| 12/24/1991 | CA1293402C Pressure pulp washer |
| 12/18/1991 | EP0461138A1 Method and apparatus for thickening fiber suspension |
| 12/17/1991 | US5073264 Apparatus for treating fiber suspension |
| 12/17/1991 | US5073254 Cylindrical screening basket |
| 12/17/1991 | US5072834 Screening apparatus for paper making stock |
| 12/10/1991 | US5071543 Method of screening pulp and a screening apparatus |
| 12/03/1991 | US5069751 Froth flotation |
| 11/27/1991 | EP0457821A1 Method and apparatus for cleaning of a pulp suspension |
| 11/26/1991 | WO1991019043A1 Screening device |
| 11/26/1991 | CA2080599A1 Screening device |
| 11/21/1991 | EP0457507A1 Spray fractionation disks and method of using the same |
| 11/21/1991 | EP0456788A1 Sieve for a pressure sorting device for fibre suspensions. |
| 11/12/1991 | US5064537 Seamless screen cylinder with laser cut openings |
| 11/12/1991 | US5064125 Pulper |
| 11/12/1991 | CA2042345A1 Suspension deaerating process and apparatus |
| 11/11/1991 | WO1991017304A1 A method and a device for separating plastic particles from suspensions |
| 11/11/1991 | CA2063602A1 Method and a device for separating plastic particles from suspensions |
| 11/08/1991 | WO1991016988A1 Hydrocyclone plant |
| 11/08/1991 | WO1991016987A1 Hydrocyclone assembly |
| 11/07/1991 | DE4028772A1 Suspension sorting rotor - has projecting components inserted in openings in rotor body for lightweight and low cost |
| 11/06/1991 | EP0455312A2 Screen plates |
| 11/06/1991 | EP0454887A1 Procedure for separating plastic particles electrically from solutions, in particular from cellulose and paper fibre solutions |
| 11/05/1991 | US5062932 Procedure and means for separating plastic particles electrically from solutions, in particular from cellulose and paper fibre solutions |
| 10/30/1991 | CN1014536B Disk screen shaft assemblies and method of means for manufacturing the same |
| 10/29/1991 | US5061370 Screening device for slurries with improved rotor and hub design |
| 10/23/1991 | EP0453348A1 Screen for straining a classification of paper pulp |
| 10/23/1991 | CN2087206U Adjustable dregs discharging valve |
| 10/22/1991 | US5059324 Centrifugal pulp screen |
| 10/12/1991 | WO1991015629A1 Method and device for separating a fibre suspension |