| Patents for D21F 1 - Wet end of machines for making continuous webs of paper (14,078) |
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| 09/24/1991 | US5051195 Filters |
| 09/24/1991 | US5050646 Papermakers fabric for corrugation machines |
| 09/24/1991 | CA1289398C Dewatering press |
| 09/24/1991 | CA1289354C Arrangement in the drying section of a paper machine |
| 09/19/1991 | WO1991014037A1 Device for finishing travelling screens |
| 09/18/1991 | EP0446755A1 Shaker |
| 09/17/1991 | US5049425 Porous yarn for OMS pintles |
| 09/17/1991 | US5048200 Process and apparatus for dehumidifying wet air |
| 09/11/1991 | EP0445564A1 Method for regulating flow directions of a headbox in a paper machine |
| 09/11/1991 | CN1054457A Single-layer or multi-layer headbox for wide flow range |
| 09/10/1991 | CA1288625C Turbulence generator for the head box of a paper machine |
| 09/10/1991 | CA1288588C Web transfer apparatus |
| 09/04/1991 | EP0444587A1 Hook and separator containing such hook to pick up and isolate threads |
| 09/04/1991 | EP0301024B1 Dewatering press |
| 09/03/1991 | US5045181 Apparatus for removing ash from repulped wastepaper |
| 09/03/1991 | US5045154 Conveyor edge product containing device for paper making machinery |
| 09/03/1991 | US5045153 Double screen former with flexible laths spaced greater than opposite rigid laths |
| 09/03/1991 | US5044179 Stabilizing pressure and flow conditions in a screening apparatus |
| 08/29/1991 | DE4005147A1 Paper making stock inlet jet - delivers fibre suspension in a stream which opens out without micro-turbulence |
| 08/27/1991 | CA2036980A1 Plate and separator containing such a plate for seizing and separating threads |
| 08/22/1991 | WO1991012441A1 Multifilament helical seaming element |
| 08/22/1991 | WO1991012065A1 Apparatus for filtering liquids |
| 08/22/1991 | DE4005281A1 Paper-making stock inlet - has diluting water for suspension by segments, to control paper weight profile without altering stock inlet lips |
| 08/22/1991 | CA2069883A1 Apparatus for filtering liquids |
| 08/21/1991 | EP0442183A1 Conversion of pulp and paper mill waste solids to papermaking pulp |
| 08/21/1991 | CN1013598B Method and apparatus for drying paper web |
| 08/21/1991 | CN1013597B Automatic pulp density control apparatus |
| 08/21/1991 | CN1013596B Method and device of active attenuator for attenuation of pressure pulsation in headbox in paper and board machine |
| 08/21/1991 | CN1013595B Method and apparatus for controlling consistency of pulp suspension |
| 08/18/1991 | CA2036446A1 Forming a fiber web using a widened jet of suspension |
| 08/17/1991 | WO1991012066A1 Apparatus for filtering liquids |
| 08/17/1991 | WO1991012064A1 Apparatus for filtering liquids |
| 08/17/1991 | WO1991012063A1 An apparatus for filtering suspensions and a method of operating the apparatus |
| 08/17/1991 | CA2069882A1 Apparatus for filtering liquids |
| 08/15/1991 | CA2036316A1 Multifilament helical seaming element |
| 08/14/1991 | EP0441412A2 Dryer fabric seaming |
| 08/14/1991 | DE4002304A1 Paper forming stretch |
| 08/13/1991 | US5039412 Wire with guide belts for a pulp thickener |
| 08/07/1991 | EP0440595A2 Apparatus for selectively releasing yarns from a fringe |
| 08/07/1991 | EP0439571A1 Improved system and method for forming and dewatering a web on a fourdrinier fabric. |
| 08/01/1991 | DE4002305A1 Paper machinery |
| 08/01/1991 | CA2206731A1 Apparatus for capturing and stabilizing yarns prior to interweaving |
| 08/01/1991 | CA2206577A1 Apparatus for selectively releasing yarns from a fringe |
| 07/31/1991 | EP0438685A1 Former in a paper machine |
| 07/31/1991 | EP0438681A1 De-watering apparatus for a twin-wire former |
| 07/30/1991 | US5035773 Headbox with concave auxiliary blade |
| 07/30/1991 | CA1286892C Method for measuring the properties of a composition consisting of a liquid and solid particles and apparatus used in the method |
| 07/25/1991 | WO1991010775A1 Device for guiding the screen of a double-screen part of a paper- or cardboard-making machine |
| 07/24/1991 | EP0438092A1 An apparatus for thickening fibre suspension |
| 07/23/1991 | US5034101 Headbox with support beam on movable duct wall |
| 07/23/1991 | US5034100 Stationary drainage device with pressure roll |
| 07/23/1991 | US5033618 Installation cable unwinder |
| 07/23/1991 | CA1286633C Disc screen improvement for chip screen efficiency |
| 07/23/1991 | CA1286498C Direct fired cylinder dryer |
| 07/18/1991 | CA2033920A1 Apparatus for thickening fibre suspension |
| 07/16/1991 | US5031283 Multifilament helical seaming element |
| 07/09/1991 | US5030326 Paste-like mixture feed device |
| 07/03/1991 | CN1052714A Method and device in headbox of paper, board or pulp drying |
| 07/02/1991 | US5028315 Froth flotation apparatus and method |
| 07/02/1991 | US5027483 Apparatus for selectively releasing yarns from a fringe |
| 07/02/1991 | CA1285411C Stationary couch device for a papermaking machine |
| 06/27/1991 | WO1991009172A1 Method of making watermarked paper |
| 06/26/1991 | EP0434305A2 Method and device in headbox of paper, board or pulp drying machine |
| 06/26/1991 | EP0434304A1 Single-layer or multi-layer headbox for wide flow range |
| 06/26/1991 | EP0433434A1 Improved dewatering system with vortex valve |
| 06/25/1991 | US5025839 Two-ply papermakers forming fabric with zig-zagging MD yarns |
| 06/25/1991 | CA1285163C Roll for the pressure treatment of webs of material |
| 06/25/1991 | CA1285131C Equipment for unraveling threads from a fabric |
| 06/23/1991 | CA2032292A1 Method and device in headbox of paper, board or pulp drying machine |
| 06/23/1991 | CA2032291A1 Single-layer or multi-layer headbox for wide flow range |
| 06/19/1991 | EP0432928A2 Froth flotation apparatus and method |
| 06/19/1991 | EP0432413A1 Compound tissue for paper-making machine fabrics |
| 06/12/1991 | EP0431750A2 Multi-layered papermakers fabric for thru-dryer application |
| 06/12/1991 | CA2030420A1 Froth flotation apparatus and method |
| 06/11/1991 | US5023132 Polyamide or nylon filaments |
| 06/11/1991 | US5022984 Froth flotation apparatus and method |
| 06/11/1991 | US5022965 Method and device in a head box of a paper machine for controlling distribution of fiber orientation in a paper web |
| 06/11/1991 | US5022441 Papermaker's double layer fabric with high warp and weft volume per repeat |
| 06/11/1991 | CA1284799C Method of and means for hydrodynamic mixing |
| 06/05/1991 | EP0429621A1 Process and unit for drying wet nonwovens on a fourdrinier machine |
| 06/05/1991 | CN2078339U Pressurized formation path for circular netting |
| 06/04/1991 | US5021265 Roll arrangement for non-deforming treatment of moving web-type products |
| 06/04/1991 | US5021159 Apparatus for thickening pulp and paper stock |
| 06/04/1991 | US5021136 Apparatus and method for removing liquid from liquid bearing material |
| 06/04/1991 | US5020178 Stabilizing pressure and flow conditions in a screening apparatus |
| 05/29/1991 | CN1012689B Press apparatus |
| 05/28/1991 | US5019230 Apparatus and method for removing liquid from liquid bearing material |
| 05/28/1991 | US5019216 Headbox with coarse and fine adjustment of the slice |
| 05/28/1991 | US5019215 Headbox with conduits having multiply connected domains |
| 05/28/1991 | CA1284435C Kraft linerboard by densification and heat treatment |
| 05/22/1991 | EP0428470A2 Felt turning roll |
| 05/22/1991 | EP0428257A2 Flotation machine for de-inking |
| 05/22/1991 | EP0427712A1 Process for manufacturing web-type materials from fibers or other particles suspended in newtonian or non-newtonian fluids |
| 05/21/1991 | US5016824 Method and apparatus for controlling the production of thermomechanical pulp |
| 05/21/1991 | US5016678 Double-layer papermaking fabric having a single system of non-symmetrically extending longitudinal threads |
| 05/21/1991 | CA1284256C Method of treatment of circulation water of a paper mill |
| 05/14/1991 | US5015336 Felt turning suction roll |
| 05/14/1991 | US5015220 Seam for work fabric and method of manufacture thereof |
| 05/14/1991 | CA1284082C Multi-layer fabric for paper-making |
| 05/08/1991 | EP0425641A1 Dimensionally stable papermakers fabric |