| Patents for D21C 7 - Digesters (1,988) |
|---|
| 02/08/1984 | EP0100293A1 Improvement in batch processes for digesting wood chips |
| 12/20/1983 | CA1158904A1 Method and means for use in the manufacture of fibre pulp |
| 12/13/1983 | CA1158624A1 High pressure valve assembly |
| 09/07/1983 | EP0087412A1 Method and apparatus for mixing pulp with gases. |
| 05/24/1983 | CA1146788A1 Chips bin steaming |
| 05/04/1983 | EP0078129A1 Method and apparatus for the continuous oxygen delignification of fibrous materials |
| 03/22/1983 | CA1143201A1 Vessel false bottoming |
| 03/17/1983 | WO1983000816A1 Method and apparatus for mixing pulp with oxygen |
| 02/08/1983 | US4372338 High pressure valve assembly |
| 01/25/1983 | US4370172 Controlled vortex pump feed for supplying cellulose-containing material to reaction vessel |
| 12/14/1982 | US4363697 Method for medium consistency oxygen delignification of pulp |
| 11/09/1982 | CA1135101A1 Method for secondary heat recovery in batchwise cellulose digesting |
| 08/24/1982 | CA1130061A1 Exothermic heat as a means of determining the degree of delignification |
| 07/13/1982 | CA1127357A1 Process for producing alkali pulp |
| 06/16/1982 | EP0054015A1 Process and apparatus for producing cellulose |
| 05/25/1982 | US4331509 Digester strainer locking assembly |
| 05/11/1982 | CA1123248A1 Method relating to discontinuous treatment of fibre material |
| 03/17/1982 | EP0047656A1 Process and apparatus for the oxygen delignification of pulp |
| 01/05/1982 | CA1115575A1 Continuous digester dimensioning |
| 10/28/1981 | EP0038373A1 Apparatus and method for discharge of pressure cooked particulate or fibrous material |
| 10/06/1981 | CA1110095A1 Rotary charger |
| 08/19/1981 | EP0034095A1 Process and installation for feeding vegetal material to processing enclosures before it is being cooked or reacted under pressure |
| 08/18/1981 | US4284120 Method and device for transfer of fiber materials transportable by liquids |
| 07/28/1981 | CA1105755A1 Digester cooking screens switching systems |
| 06/23/1981 | US4274918 Blade conveyer for a continuously operating digester of the Bauer M and D type |
| 06/23/1981 | US4274913 Process for producing alkali pulp |
| 06/10/1981 | EP0030158A1 Apparatus and process for medium consistency oxygen delignification of pulp |
| 05/05/1981 | CA1100268A2 Continuous pulp digesting method and a digester with associated devices for applying the method |
| 05/05/1981 | CA1100267A2 Continuous pulp digesting method and a digester with associated devices for applying the method |
| 03/31/1981 | US4259151 Pulping apparatus |
| 03/17/1981 | CA1097462A1 Continuous pulp digesting method and a digester with associated devices for applying the method |
| 02/17/1981 | CA1095764A1 Laboratory minidigesters |
| 02/03/1981 | US4248662 Delignification of wood using sodium tetraborate |
| 02/03/1981 | CA1094761A1 Cyclone separation in digester discharge |
| 02/03/1981 | CA1094760A1 Method and apparatus for control of gaseous and volatile combustibles in an oxygen reactor |
| 12/09/1980 | US4238285 Digester system for delivering wood chips in an even layer into a digester |
| 12/02/1980 | US4236961 Pulping lignocellulose in continuous pressurized batch digesters |
| 09/09/1980 | US4221632 Method and apparatus for determining the location of the chip level in a pulping digester |
| 09/09/1980 | CA1085210A1 Low chemical consumption closed mill |
| 09/03/1980 | EP0014706A1 Method for transfer of materials transportable by liquids such as fibre materials |
| 09/02/1980 | CA1084752A1 Method of fibre separation |
| 07/15/1980 | US4212705 Apparatus for recovering high pressure steam from a blow tank |
| 07/08/1980 | US4211163 Apparatus for discharge of pressure cooked particulate or fibrous material |
| 06/11/1980 | EP0011622A1 Method relating to discontinuous treatment of fibre material |
| 05/20/1980 | CA1077757A1 Chip steam distributor |
| 04/22/1980 | CA1075858A1 Method and device for impregnation of fiber material before cooking by means of pulsation of pressure between digester pressure and a lower pressure |
| 04/01/1980 | CA1074609A1 Displacement impregnation |
| 03/18/1980 | US4193840 Laboratory minidigesters and method of using the minidigesters |
| 03/18/1980 | US4193839 Flow control method and apparatus for continuous wood chip digester screenless liquor extractor |
| 01/29/1980 | CA1070646A1 Method and apparatus for conveying particulate material |
| 01/29/1980 | CA1070537A1 Method fo feeding fibrous material into a pressurized vessel |
| 12/25/1979 | CA1068526A Two-stage digestion with between vessel heating |
| 10/16/1979 | CA1064205A1 Method and device for treatment of fiber material |
| 09/20/1979 | WO1979000693A1 Method relating to discontinuous treatment of fibre material |
| 09/20/1979 | WO1979000692A1 Method for transfer of materials transportable by liquids such as fibre materials |
| 08/07/1979 | US4163687 Method and apparatus for explosively defibrating cellulosic fiber |
| 07/24/1979 | CA1058929A1 Method and apparatus for determining the location of the chip level in a pulping digester |
| 06/19/1979 | CA1056637A1 Continuous flow multistate dewatering apparatus for removing water from an aqueous suspension of pulp material while being conveyed to a steam pressurized reaction vessel |
| 06/19/1979 | CA1056636A1 Digester system and method |
| 06/05/1979 | CA1055756A1 Static discharge device and method for fiber discharge from a pressurized digester |
| 06/05/1979 | CA1055755A1 Process and apparatus for the manufacture of pulp |
| 05/22/1979 | US4155806 Method for continuous alkaline delignification of lignocellulose material in two or more steps, the final of which with oxygen |
| 05/22/1979 | US4155805 Countercurrent |
| 05/22/1979 | CA1054757A1 Method and device for continuous treatment of fiber material |
| 02/27/1979 | US4141784 Method and apparatus for controlling wood chip digester level |
| 02/27/1979 | CA1049310A1 Flow control method and apparatus for continuous wood chip digester "screenless" liquor extractor |
| 01/23/1979 | US4135966 Method and device for equalizing the moisture content of porous material |
| 01/09/1979 | US4133714 Reaction vessel with pulsating means for producing lignocellulose product from crushed vegetable raw materials |
| 12/12/1978 | CA1044060A1 Screenless digesting system and method |
| 11/07/1978 | US4124440 Chip bin steam distributor with a vibrating discharge |
| 10/17/1978 | US4120748 Digester system for delivering wood chips in an even layer into a digester |
| 10/17/1978 | CA1040470A1 Method and apparatus for filling a treatment vessel |
| 10/10/1978 | US4119025 Method and apparatus for conveying particulate material |
| 09/19/1978 | CA1038675A1 Method and device for selective impregnation of heterogenous fiber material before cooking |
| 08/01/1978 | US4104113 Cellulosic fiber |
| 05/30/1978 | US4092212 Selective impregnation of heterogenous fiber material before digestion |
| 05/09/1978 | US4088528 Method and apparatus for grinding chips into paper pulp |
| 03/14/1978 | US4078964 Method and apparatus for filling a pressure treatment vessel with a fiber material and liquid mixture |
| 01/31/1978 | US4071399 Apparatus and method for the displacement impregnation of cellulosic chips material |
| 12/13/1977 | US4062722 Device for treating deformable particles with the counterflowing liquids |
| 12/06/1977 | US4061193 Method and apparatus for digesting cellulose material without screening digesting liquid withdrawn through the digester top |
| 11/08/1977 | US4057461 Method and apparatus for impregnation of fiber material by pressure pulsation |
| 08/09/1977 | US4040901 Mounting for sectional screen |
| 08/09/1977 | US4040899 Production of high strength packaging papers from straw |
| 08/02/1977 | US4039373 Static discharge device and method for fiber discharge from a pressurized digester |
| 07/05/1977 | US4033811 Method and apparatus for filling of fiber material and liquid to steam phase in treatment vessel |
| 06/07/1977 | US4028171 Method for continuous treatment of fiber material in a vertical array |
| 03/02/1976 | US3941650 Continuous digester |