| Patents for D21F 1 - Wet end of machines for making continuous webs of paper (14,078) |
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| 12/27/1990 | CA1278207C Web forming apparatus |
| 12/25/1990 | US4980027 Vari-flow headbox with large and small flow inlet systems |
| 12/25/1990 | US4980026 Headbox with movable duct wall |
| 12/25/1990 | US4979543 Pin seamed planar press fabric |
| 12/24/1990 | WO1991000388A1 Improved dewatering system with vortex valve |
| 12/24/1990 | CA2033210A1 Dewatering system with vortex valve |
| 12/20/1990 | DE3919424A1 Curved tube section web spreading roller - has powered universal shaft connected to carrier sleeve at the axis end |
| 12/19/1990 | EP0402448A1 Seam construction for papermaking fabrics |
| 12/18/1990 | US4978428 Bearing blanket for an extended nip press having laminates of different hardnesses |
| 12/13/1990 | WO1990015185A1 A device for removing waste paper that falls under a paper machine |
| 12/12/1990 | EP0248007B1 Method and apparatus for dividing and uniting the flows of high-consistency fibre suspensions |
| 12/11/1990 | US4976293 Built up seam for papermakers fabric |
| 12/11/1990 | CA1277531C Dewatering apparatus |
| 12/09/1990 | WO1990015188A1 Pressure control forming section |
| 12/09/1990 | WO1990015187A1 Continuous controlled drainage |
| 12/09/1990 | WO1990015186A1 Pressurized forming board |
| 12/05/1990 | EP0400270A2 Installation for thickening fibre suspensions |
| 12/05/1990 | CN1047545A Flow regulating solute equalizer |
| 12/05/1990 | CN1010700B Pulp stock chest unit of cylinder paper machine |
| 12/04/1990 | US4975166 Feeding liquid through electrostatic field of variable intensity |
| 12/04/1990 | US4975151 Two-speed single lever stepper actuator |
| 12/04/1990 | US4974642 Connecting thread arrangement in dual fabric papermaking fabric |
| 12/04/1990 | CA1277209C Composite forming fabric |
| 12/04/1990 | CA1277165C Hydraulic pressing shoe, its use and a method for operating it |
| 12/04/1990 | CA1277110C Method for cooking control of lignocelluloses by ftir spectroscopy |
| 12/01/1990 | WO1990015184A1 Nozzle for spray tubes |
| 11/28/1990 | EP0399674A2 Jointing of fabric ends |
| 11/28/1990 | CN1010598B Recovering technique for fibre in cylinder machine without power |
| 11/27/1990 | WO1990014465A1 Forming fabric having a nonwoven surface coating |
| 11/27/1990 | US4973512 Press felt for use in papermaking machine |
| 11/27/1990 | US4973385 Vacuum water drawing cylinder for making paper |
| 11/27/1990 | US4972561 Method of producing an angled pin seam in a papermakers felt |
| 11/22/1990 | EP0269691B1 Fixation device |
| 11/20/1990 | US4971659 Head box with reducing stream gate |
| 11/15/1990 | WO1990013693A1 Dimensionally stable papermakers fabric |
| 11/14/1990 | EP0397430A1 Web forming method and apparatus |
| 11/13/1990 | US4970100 Fabric for papermaking machines |
| 11/06/1990 | US4968387 Papermachine deckle means |
| 11/06/1990 | US4967805 Multi-ply forming fabric providing varying widths of machine direction drainage channels |
| 11/01/1990 | WO1990012919A1 Dewatering device |
| 10/30/1990 | US4966653 Apparatus for controlling a moving band |
| 10/25/1990 | WO1990012918A1 Paper machine felts |
| 10/24/1990 | EP0394134A1 Process for marking a flexible structure, flexible structure obtained and its use in a process for marking a cellulose web |
| 10/24/1990 | EP0393656A1 Assembly in a paper machine for effecting upward dewatering |
| 10/24/1990 | EP0393241A2 Apparatus for introducing filler yarns in a spiral fabric |
| 10/23/1990 | US4964956 Improve detachment, prevent fluttering by abruptly changing direction of travel of one wire |
| 10/23/1990 | US4964950 Method and apparatus for dividing and uniting the flows of high-consistency fibre suspensions |
| 10/23/1990 | US4964733 Method of and means for hydrodynamic mixing |
| 10/19/1990 | CA2014790A1 Assembly in a paper machine for effecting upward dewatering |
| 10/18/1990 | WO1990012148A1 An apparatus for applying stock on wire |
| 10/17/1990 | CN1046203A Glass face-plate of vacuum dewatering tank of paper machine |
| 10/16/1990 | US4963228 Headbox having Coanda nozzle for mixing slurry therein |
| 10/10/1990 | EP0391042A1 Method of controlling a flotation plant |
| 10/10/1990 | EP0391015A1 Headbox system |
| 10/09/1990 | CA1274997A1 Synthetic press roll and methods for its manufacture |
| 10/08/1990 | WO1990012149A1 Slice lip protector system |
| 10/08/1990 | CA2050489A1 Slice lip protector system |
| 10/07/1990 | CA2014216A1 Process for controlling a flotation device |
| 10/04/1990 | WO1990009696A3 Two-speed stepper actuator |
| 10/03/1990 | EP0390005A2 Multi-layer screen-cloth for paper machine |
| 10/03/1990 | CN1045828A Web forming method and device |
| 10/03/1990 | CN1045827A Apparatus for guiding wires of paper machine former |
| 10/02/1990 | US4960492 Common wire path of a wet end section of a twin wire paper making machine |
| 09/26/1990 | EP0388880A1 Separator for seaming machines |
| 09/26/1990 | EP0388601A2 Forming fabric for the wet end of a paper making machine |
| 09/25/1990 | CA1274566A1 Arrangement in an adjustable roller bearing for lateral guidance of running webs |
| 09/19/1990 | EP0387395A2 Stabilized polyurethane modified polyester forming fabric |
| 09/19/1990 | EP0250421B1 A flat structure permeable to liquid, and a method for manufacturing such a structure |
| 09/18/1990 | US4957598 Suction box cover with modular components |
| 09/13/1990 | CA2001538A1 Application of glucanase to control industrial slime |
| 09/12/1990 | EP0386065A1 A method of removing organic substances from effluents from pulp and paper manufacturing processes |
| 09/11/1990 | US4956050 Method for attenuation of the machine direction pressure pulsations in the headbox in paper and board machines |
| 09/05/1990 | WO1990010165A1 Improvements in or relating to papermakers and like fabrics |
| 09/03/1990 | WO1990010110A1 Method and apparatus for thickening fiber suspension |
| 09/03/1990 | CA2047749A1 Method and apparatus for thickening fiber suspension |
| 08/29/1990 | CN1044966A Recovery and reuse method of papermaking effuent |
| 08/28/1990 | US4952308 Pressurized flotation module and method for pressurized foam separation |
| 08/28/1990 | US4951879 Liquid distribution device |
| 08/28/1990 | US4951392 Synthetic press roll for paper machines and method for manufacturing the same |
| 08/28/1990 | CA1273197A1 Rotary joint for stationary siphon |
| 08/23/1990 | WO1990009696A2 Two-speed stepper actuator |
| 08/23/1990 | WO1990009481A1 A forming apparatus for forming a web from stock |
| 08/22/1990 | EP0383486A2 Improvements in and relating to paper making machines |
| 08/21/1990 | US4950403 Screen segment for filters for thickening fiber suspensions |
| 08/18/1990 | CA2048656A1 Two-speed stepper actuator |
| 08/16/1990 | DE3929561C1 Cleaning and spraying device for sieves in paper machines - has double wall tube with water inlet and hand-wheel operated dirt discharge |
| 08/16/1990 | DE3841018A1 Dewatering device |
| 08/15/1990 | CN1009213B Headbox trailing element |
| 08/15/1990 | CN1009212B Method of and means for hydrodynamic mixing |
| 08/14/1990 | US4948658 Strip of material and its manufacturing method |
| 08/14/1990 | CA1272631A1 Drainage belt for presses in the wet section of a paper machine |
| 08/09/1990 | DE3903198A1 Multilayer wire fabric of a paper machine |
| 08/08/1990 | CN1044505A Automatic pulp density control apparatus |
| 08/08/1990 | CN1009118B Headbox tratling element |
| 08/07/1990 | US4945952 Multiple layer paper making wire with zig zag directed connecting threads between layers |
| 08/07/1990 | US4945612 System and a method for joining the ends of a band-shaped elongate element |
| 07/31/1990 | US4944843 Foamed fiber dispersion |
| 07/31/1990 | US4944167 Pulp treating apparatus |
| 07/31/1990 | CA1272103A1 Forming fabric |
| 07/31/1990 | CA1272055A1 Air motor - harmonic drive slice lip automation system |