| Patents for D21F 1 - Wet end of machines for making continuous webs of paper (14,078) |
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| 05/07/1991 | US5013454 Method of removing organic substances from effluents from pulp and paper manufacturing processes |
| 05/07/1991 | US5013406 Papermaking, wear resistance |
| 05/07/1991 | US5013330 Multi-layered papermakers fabric for thru-dryer application |
| 05/04/1991 | WO1991006704A1 Method and apparatus for recovering pulp solids from whitewater |
| 05/04/1991 | CA2045515A1 Method and apparatus for recovering pulp solids from whitewater |
| 04/30/1991 | US5011577 Pressure control forming section |
| 04/30/1991 | US5011576 Breast box nozzle for a paper machine |
| 04/30/1991 | US5011575 Inclined multiplyformer |
| 04/30/1991 | CA1283645C Laminating device with paper tension control |
| 04/30/1991 | CA1283589C Clothing for the sheet forming section of a papermaking machine |
| 04/30/1991 | CA1283588C Auxiliary device for a seam weaving machine for joining the ends offlat-woven fabrics |
| 04/30/1991 | CA1283572C Method to dewater pulp for paper with simultaneous formation of sheet in a two-wire system, and plant which employs such method |
| 04/23/1991 | US5009748 Process and system for controlling the basis weight of a sheet material |
| 04/17/1991 | EP0422314A1 A method and device for the production of cellulose pulp of improved quality |
| 04/16/1991 | US5008321 Preparation of stable water-in-oil emulsions of hydrolyzed polymers of N-vinylamides and their use |
| 04/16/1991 | CA1282981C Cylinder having a rotating envelope |
| 04/11/1991 | WO1991005912A1 A method and device for the production of cellulose pulp of improved quality |
| 04/11/1991 | DE4031608A1 Paper-making blanket yarn - has side sections extending from centre to overlap for permeability and weave in place without distortion |
| 04/10/1991 | CA2026750A1 Yarn |
| 04/09/1991 | US5006399 Planar textile structure |
| 04/09/1991 | US5005610 Papermaking fabric pin seam with braided yarns in joining loops |
| 04/09/1991 | CA1282622C Press roll and method for the manufacturing of same |
| 04/09/1991 | CA1282620C Method for the adjustment of the dewatering in the wire section of a paper machine |
| 04/03/1991 | EP0419590A1 An apparatus for dewatering and squeezing material |
| 04/02/1991 | US5003675 For seizing threads held in an array |
| 03/27/1991 | EP0418445A1 Apparatus for feeding a pasty mixture |
| 03/26/1991 | US5002801 Coating with foamed resin, drying, curing |
| 03/26/1991 | US5002633 Conversion of pulp and paper mill waste solids to papermaking pulp |
| 03/21/1991 | WO1991003669A1 Stepper actuator |
| 03/21/1991 | WO1991003359A1 An apparatus for cutting a moving paper sheet by means of a water jet |
| 03/20/1991 | WO1991004374A1 Press section dewatering fabric |
| 03/20/1991 | EP0417717A2 Polyesterfibres modified with carbodiimides and process for their preparation |
| 03/20/1991 | EP0417408A1 Process for making a screen drum and screen drum made according to the process |
| 03/19/1991 | US5000227 Pressurized fluid carrier conduit connection |
| 03/19/1991 | CA1281615C Fabric for the sheet forming section of a papermaking machine |
| 03/19/1991 | CA1281570C Method and apparatus for cleaning fabrics |
| 03/19/1991 | CA1281569C Papermaker's felt utilizing special web-making techniques to avoid vibration |
| 03/14/1991 | DE3929310A1 Synthetic spiral assembly - used to form continuous transfer cloth for paper machines |
| 03/13/1991 | EP0417030A1 An apparatus for removing ash from repulped wastepaper |
| 03/13/1991 | EP0416219A1 Foil blade for the forming section of a papermaking machine |
| 03/13/1991 | CN1049880A Hydraulic automatic pulp-collecting machine |
| 03/12/1991 | US4999088 No-box system with booster head spray for delivering paper stock to a paper machine |
| 03/12/1991 | US4999087 Twin wire forming apparatus with positive pressure foils |
| 03/12/1991 | US4999086 Dispersion roll in a fourdrinier machine |
| 03/12/1991 | US4998569 Single-layer papermaking broken-twill fabric avoiding wire marks |
| 03/12/1991 | US4998568 Double layered papermaking fabric with high paper side cross thread density |
| 03/12/1991 | CA1281222C Headbox device for a papermaking machine |
| 03/07/1991 | WO1991002642A1 Molded paper clothing |
| 03/06/1991 | EP0415686A2 Sealing member for a filter press |
| 03/06/1991 | CN1011897B Hydraulic headbox of paper or board making machine |
| 03/05/1991 | US4997578 Method and apparatus for dewatering and squeezing material |
| 03/03/1991 | CA2022182A1 Ledge for the sheet forming zone of a papermaking machine |
| 03/01/1991 | CA2024342A1 Sealing member for a filter press |
| 02/28/1991 | DE3927597A1 Doppelsieb-former Twin-shaper |
| 02/28/1991 | CA2016998A1 Molded paper clothing |
| 02/27/1991 | EP0414148A2 Forming fabric with interposing cross machine direction yarns |
| 02/27/1991 | EP0413869A2 Press fabrics |
| 02/27/1991 | CN1011797B Extended nip press belt guide and method |
| 02/26/1991 | US4995429 Paper machine fabric |
| 02/26/1991 | US4995428 Single-layer |
| 02/26/1991 | CA1280635C Fastening of a profile bar to an adjustment spindle in a head box |
| 02/23/1991 | WO1991002842A1 Twin-wire paper-web former |
| 02/19/1991 | CA1280339C Forming fabric structure to resist rewet of the paper sheet |
| 02/19/1991 | CA1280337C Method and apparatus for dividing and uniting the flows of high-consistency fibre suspensions |
| 02/19/1991 | CA1280309C Device for joining a wet press felt and a paper making screen |
| 02/13/1991 | EP0412136A1 Adjustment gear assembly. |
| 02/12/1991 | US4991630 Papermakers fabric |
| 02/12/1991 | CA1280076C Method and apparatus for thickening a suspension |
| 02/07/1991 | WO1991001408A1 Improved system and method for forming and dewatering a web on a fourdrinier fabric |
| 02/06/1991 | CN2070768U Reciprocating moving net washing device |
| 02/06/1991 | CN1049037A Web forming method and apparatus |
| 02/05/1991 | US4989648 Single-layer papermaking fabric having a flat surface of auxiliary wefts |
| 02/05/1991 | US4989647 Dual warp forming fabric with a diagonal knuckle pattern |
| 01/30/1991 | EP0410556A2 Suction box cover |
| 01/29/1991 | US4988408 Apparatus for guiding wires of a double wire former |
| 01/29/1991 | US4987929 Forming fabric with interposing cross machine direction yarns |
| 01/29/1991 | CA1279507C Setting device for adjusting the position of a roll |
| 01/29/1991 | CA1279503C Spiral link belt |
| 01/27/1991 | WO1991002118A1 Headbox with grooved trailing element |
| 01/27/1991 | CA2008577A1 Novel suction box cover |
| 01/24/1991 | DE4020501A1 Pinned press, felt for dewatering cellulose pulp |
| 01/23/1991 | EP0408894A2 Method for regulation and on-line measurement of the fibre orientation in a web produced by means of a paper machine |
| 01/23/1991 | EP0408849A2 Forming fabric for the wet end of a paper machine |
| 01/22/1991 | US4985970 Seaming machine to manufacture an insertion-type seam for making a cloth belt endless |
| 01/22/1991 | CA1279234C Clothing for the sheet forming section of papermaking machine |
| 01/22/1991 | CA1279213C Profile setting device for conformable wall cylinder |
| 01/16/1991 | EP0407887A2 Polyphenylensulfide monofil for papermachine fabric |
| 01/15/1991 | US4985121 Ceramic foam member for extracting water from a paper web in a papermaking machine |
| 01/15/1991 | US4985084 Two-layer paper machine fabric |
| 01/09/1991 | EP0344181A4 Multi-ply paper forming fabric with ovate warp yarns in lowermost ply |
| 01/08/1991 | US4983258 Conversion of pulp and paper mill waste solids to papermaking pulp |
| 01/08/1991 | US4982766 Paper machine fabric |
| 01/08/1991 | CA1278734C Covering for a machine, in particular a screen or felt for a papermaking machine |
| 01/07/1991 | WO1991000768A1 Method and apparatus for treating fiber suspension |
| 01/07/1991 | WO1991000767A1 Filter cylinder |
| 01/02/1991 | EP0405154A1 Moist paper forming device for paper machine |
| 01/02/1991 | EP0405034A2 Endless fabric |
| 01/01/1991 | US4981745 Forming fabric for papermaking |
| 12/27/1990 | WO1990015899A1 Process and unit for drying wet nonwovens on a fourdrinier machine |
| 12/27/1990 | CA1278240C Paper forming fabric |