Patents
Sitemap › D21 - Paper-making; Production of cellulose › D21D - Treatment of the materials before passing to the paper-making machine › D21D 5 - Purification of the pulp suspension by mechanical means; Apparatus therefor
Patents for D21D 5 - Purification of the pulp suspension by mechanical means; Apparatus therefor (4,157)
06/1982
06/15/1982CA1125666A1 Apparatus for separation of material suspended in liquids
06/15/1982CA1125665A1 Pulp screen device
06/08/1982US4333572 Separation of pulp flow
06/08/1982CA1125077A1 Procedure and apparatus for preparing groundwood mechanically from wood chips
05/1982
05/04/1982US4328096 Chevron-shaped rotor foils
04/1982
04/21/1982EP0049789A1 Screening apparatus
04/20/1982US4325642 Storage and homogenizing tank for kaolin suspensions
04/13/1982CA1121637A1 Method and apparatus for degassing paper stock
03/1982
03/30/1982CA1120895A1 Hydrocyclone with dilution liquid inlet in a compound heavies outlet chamber thereof
03/30/1982CA1120659A1 Degassing of pulp
03/23/1982CA1120435A1 Hydrocyclone with macro outlet ports
03/09/1982US4318805 Screening apparatus
03/03/1982EP0046687A1 Screening apparatus for paper making stock
03/02/1982CA1119107A1 Method and apparatus for outflowing liquids from chamber maintained under vacuum
02/1982
02/23/1982US4316768 Pulse free stock screen and combination pump
02/10/1982EP0045705A1 Method and apparatus for separating suspensions of solid particles in a liquid, particularly for treating fibrous suspensions in the paper-making industry
02/02/1982CA1117620A1 Cyclone monitoring apparatus and method
01/1982
01/12/1982CA1116126A1 Separation of abrasive-containing mixtures in a hydrocyclone separator
01/05/1982US4309284 Screen device for paper material
01/05/1982US4309283 For dividing a fiber suspension
12/1981
12/30/1981EP0042742A1 Apparatus for screening paper fiber stock
12/22/1981US4306975 Sieve apparatus containing a rotatable circular sieve
12/01/1981US4303508 Screening device
12/01/1981US4303207 Screening apparatus
11/1981
11/24/1981US4302327 Filtering liquids in papermaking
11/24/1981US4301930 Disk screen, modular disk assembly and method
11/03/1981CA1111784A1 Deaerator for pulp stock
10/1981
10/28/1981EP0038643A2 Filter with backwashing device
10/27/1981US4297209 High solids filter
10/07/1981EP0037278A2 Output header for hydrocyclones with concentric accept outlets
10/06/1981CA1110205A1 Sorting apparatus containing serial removal devices for a stock suspension obtained from waste paper
09/1981
09/29/1981US4292122 Bonding properties of mechanical pulps
09/23/1981EP0036329A2 Center flow screening apparatus
09/23/1981EP0036328A2 Dual flow screening apparatus
09/02/1981EP0034780A2 Rotating sorter
09/01/1981US4287055 Method of sorting fibre suspensions as well as a pressure sorter for performing the method
07/1981
07/28/1981US4280902 Particularly liquids used in the production of cellulosic pulp
07/28/1981CA1105890A1 Opposed vortex finder outlets in banked hydrocyclones
07/14/1981US4278534 Method for separation of material mixtures, containing abrasive particles, in a hydrocyclone separator
07/14/1981CA1104856A1 Pulp refining element
06/1981
06/30/1981US4276159 Apparatus for screening paper fiber stock
06/30/1981US4276059 Deaerator for pulp stock
06/30/1981CA1104094A1 Leak detecting and housing means for hydrocyclones
06/09/1981CA1102604A1 Method and an apparatus for treating fibre suspensions
05/1981
05/19/1981US4268382 Sieve and sieving apparatus for separating solids from a suspension
05/19/1981US4268381 Rotary pulp screening device of the vertical pressure type
05/12/1981US4267048 Equipment for separating foreign matter from liquid papermaking materials
05/12/1981US4267035 For screening pulps
05/05/1981US4265740 Centrifugal separator
04/1981
04/28/1981US4264438 Screen drum and a method for its manufacture
04/28/1981US4264437 Method and apparatus for pressure screening fibrous suspensions
04/08/1981EP0026661A2 Liquid treatment apparatus comprising rotatable drum with flexible edge seal
03/1981
03/31/1981US4259180 Hydrocyclone
03/18/1981EP0025310A1 Pressurized rotary screening apparatus
03/03/1981US4253945 High consistency pulp cleaning
02/1981
02/24/1981US4252641 Pressurized screen
02/24/1981US4252640 Apparatus for sorting fibrous stock suspensions
02/19/1981WO1981000359A1 Method and filter for separating filterable particles from a liquid suspension
02/11/1981EP0023839A1 Screen assembly
02/03/1981CA1094761A1 Cyclone separation in digester discharge
12/1980
12/16/1980CA1091623A1 Pressure drop device for fluid suspensions
12/16/1980CA1091597A1 Method and device in connection with a pressure cyclone
12/10/1980EP0020023A1 Method and apparatus for the de-aeration of pulp stock
12/09/1980US4238324 Apparatus for separating impurities from fiber suspensions
12/09/1980US4238208 Apparatus for degassing paper stock
12/02/1980US4236998 Process and apparatus for purifying a fibrous suspension
11/1980
11/18/1980US4234417 Fibrous stock screen
11/11/1980US4233160 Hydrocyclone separator arrangement
11/11/1980CA1089372A1 Method of and apparatus for flow spreading
11/04/1980US4231881 Pulp screen device
09/1980
09/30/1980US4225427 Sorting apparatus for a stock suspension obtained from waste paper
09/23/1980US4224145 Vortex cleaner
09/23/1980CA1086237A1 Screen with cantilevered reenforcement for foil stress
09/16/1980US4222863 Screening apparatus and method
09/09/1980CA1085348A1 Angularly disposed blades for a cylindrical suspension classifier
08/1980
08/26/1980US4219340 Method and apparatus for outflowing liquids from chamber maintained under vacuum
08/26/1980CA1084461A1 Mounting of cleaners in papermaking system
08/26/1980CA1084449A1 Vortex cleaner
08/19/1980CA1084001A1 Multi unit hydrocyclone bank with axial supplies
08/12/1980US4217220 Rotary filter
08/12/1980CA1083395A1 Stock pulper installation having a stock pulper for pulping and sorting waste paper
08/05/1980CA1083085A1 Hydrocyclone separator
07/1980
07/22/1980US4213823 Paper making machine screen with staggered foils
07/22/1980CA1082020A1 Method and apparatus for degassing paper stock
07/08/1980US4211643 Hydrocyclone separator
06/1980
06/24/1980US4209359 Process for removing residual oxygen from oxygen-bleached pulp
06/17/1980CA1079690A1 Semi-hydrofoil profile in a rotating screen clearer
06/10/1980US4207140 Method of producing groundwood pulp
06/10/1980US4207139 Grinding under superatmospheric pressure and heat
06/03/1980CA1078788A1 Undersurface feed nozzles and pressurized rejects chamber for a liquid-gas screen
06/03/1980CA1078644A1 Specific surface fractionator
05/1980
05/13/1980US4202761 Sorting apparatus for sorting fiber suspensions
04/1980
04/29/1980US4200537 Apparatus for the purification of paper pulp
04/29/1980US4200486 Sorting by cyclone separators and screens
04/22/1980CA1076067A1 Airfoil-shaped rotating stock screen cleaner with inner pumping rib
04/15/1980US4198302 Apparatus for relieving blockage of the pulp discharge passage in a cyclone in a pulping system
04/08/1980US4197193 Apparatus for classifying the constituents of dilute suspensions of fibers
04/01/1980CA1074733A1 Combined hydrocyclone and screen
04/01/1980CA1074608A1 Method of producing groundwood pulp
04/01/1980CA1074607A1 Method for producing groundwood pulp
1 ... 31 32 33 34 35 36 37 38 39 40 41 42