| Patents for D21F 1 - Wet end of machines for making continuous webs of paper (14,078) |
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| 02/18/1992 | US5089090 Continuous controlled drainage |
| 02/18/1992 | CA1295866C Flat structure permeable to liquid, and a method for manufacturing such a structure |
| 02/13/1992 | DE4024958A1 Paper pulp smoothing - has oscillating materials at wet section of paper-making machine to prevent local fibre build=up |
| 02/12/1992 | EP0470946A1 Hydrocyclone deinking and removal of sticky contaminants during paper recycling |
| 02/10/1992 | CA2044383A1 Hydrocyclone deinking and removal of sticky contaminants during paper recycling |
| 02/04/1992 | CA1295161C Machine felt, and a method for manufacturing same |
| 01/28/1992 | US5084326 Forming fabric for the wet end of a papermaking machine |
| 01/28/1992 | US5084138 Deflection compensated forming wire turning bar |
| 01/28/1992 | CA1294809C Paper machine cloth |
| 01/28/1992 | CA1294808C Method of sheet transfer |
| 01/23/1992 | WO1992001114A1 Method and apparatus for manufacturing multilayer filter material |
| 01/23/1992 | WO1992001113A1 Method and apparatus for manufacturing multilayer filter material |
| 01/23/1992 | WO1992001112A1 Method and apparatus for manufacturing multilayer filter material |
| 01/23/1992 | WO1992001110A1 Turbulence roll for a web former |
| 01/22/1992 | EP0466729A1 Slice lip protector system |
| 01/22/1992 | EP0439571A4 Improved system and method for forming and dewatering a web on a fourdrinier fabric |
| 01/21/1992 | US5082532 Papermaking machine and a seamed papermaker's fabric |
| 01/21/1992 | US5082531 Head box in a paper machine |
| 01/21/1992 | US5082530 Method and device in headbox of paper, board or pulp drying machine |
| 01/15/1992 | CN2093193U Rotary blade filtering sand-removing pulp-recovering machine |
| 01/14/1992 | US5080760 Pressurized forming board |
| 01/14/1992 | US5079807 Shaped pintle wire for paper machine clothing |
| 01/09/1992 | DE4019601A1 Paper-making woven blanket - has third weft system at the machine side, to increase wear resistance |
| 01/08/1992 | CN1057687A Process for chemically treating papermaking belts |
| 01/07/1992 | US5078835 Ledge for resiliently supporting a drainage wire of a paper making machine |
| 01/02/1992 | DE4020723A1 Fourdrinier vibrating roller - has honeycomb surface pattern formed by strips on their edges around the circumference following regular serpentine paths |
| 12/31/1991 | US5077116 Forming fabric having a nonwoven surface coating |
| 12/31/1991 | US5076894 Suction box apparatus with composite cover elements mounted in slots on cross braces |
| 12/30/1991 | WO1992000416A1 Papermaking belt and method of making the same using a deformable casting surface |
| 12/30/1991 | WO1992000415A1 Papermaking belt and method of making the same using differential light transmission techniques |
| 12/30/1991 | WO1992000414A1 Papermaking belt and method of making the same using a textured casting surface |
| 12/27/1991 | EP0462472A1 Headbox for papermaking machines |
| 12/27/1991 | EP0462434A1 Roll for paper machines |
| 12/27/1991 | EP0334899B1 Apparatus for sequentially drying both sides of a paper web |
| 12/25/1991 | CN2091307U Ceramic elbow vacuum box face plate |
| 12/24/1991 | US5075001 Method and apparatus for recovering fibrous material from a paper/pulp process water stream |
| 12/24/1991 | US5074965 Dividing into different channels |
| 12/24/1991 | US5074964 For fourdrinier papermaking machines; adjustable compression compression, dewatering |
| 12/24/1991 | US5074339 Double layered paper making forming fabric with a coarse structured running side and a fine structured paper side |
| 12/20/1991 | CA2044757A1 Process and apparatus for dehumidifying wet air |
| 12/18/1991 | EP0461573A1 Case for pintle yarn |
| 12/18/1991 | EP0461138A1 Method and apparatus for thickening fiber suspension |
| 12/17/1991 | US5073235 Process for chemically treating papermaking belts |
| 12/16/1991 | CA2044734A1 Headbox |
| 12/12/1991 | DE4018120A1 Cellulose washing |
| 12/12/1991 | DE4018074A1 Recirculating fourdrinier cleaner - uses angled gap between fourdrinier and airjet entry bar for water jet stream |
| 12/11/1991 | EP0460638A1 Process and apparatus for washing cellulosic pulp |
| 12/07/1991 | WO1991019044A1 Papermakers fabric with flat machine direction yarns |
| 12/07/1991 | CA2043962A1 Expansion member, particularly for the breast box of a paper machine |
| 12/07/1991 | CA2043840A1 Method and apparatus for washing pulp |
| 12/04/1991 | EP0459089A1 Flotation deinking system |
| 12/04/1991 | EP0458973A1 Method of making watermarked paper |
| 12/04/1991 | EP0458899A1 Two-speed stepper actuator |
| 12/04/1991 | EP0458799A1 A forming apparatus for forming a web from stock. |
| 12/04/1991 | CN1015014B Roller mechanim for free deformation treatment of moving belt product |
| 12/03/1991 | US5069751 Froth flotation |
| 12/03/1991 | US5068960 Device for the insertion of filling wires into a wire jointed-band |
| 12/01/1991 | CA2041863A1 Flotation-deinking-device |
| 11/26/1991 | US5067526 14 harness dual layer papermaking fabric |
| 11/26/1991 | US5067217 Spiral shrink belt and a perforated roll |
| 11/13/1991 | EP0455784A1 Method and apparatus for recovering pulp solids from whitewater |
| 11/12/1991 | US5063840 Deterring press |
| 11/09/1991 | WO1991017292A1 Woven fabric made of synthetic monofilaments for use as a dewatering screen in a paper-manufacturing machine |
| 11/09/1991 | CA2080811A1 Woven fabric made of synthetic monofilaments for use as a dewatering screen in a paper-manufacturing machine |
| 11/06/1991 | EP0455312A2 Screen plates |
| 11/06/1991 | EP0454973A1 Suction box apparatus with composite cover elements mounted in slots on cross braces |
| 11/05/1991 | US5062964 Measuring air content of foam |
| 10/29/1991 | US5061347 Adjustable ledge for the sheet forming zone of a papermaking machine |
| 10/25/1991 | WO1991016493A1 Paper machine for the manufacture of high bulk soft crepe paper |
| 10/23/1991 | EP0452655A1 Device in a paper machine |
| 10/23/1991 | CN2087207U Cylinder net former |
| 10/22/1991 | US5059283 Process for solvent delivery of chemical compounds to papermaking belts |
| 10/22/1991 | CA1290968C Web forming apparatus |
| 10/17/1991 | DE4011796A1 Paper-making blanket floating roller - has sliding bearing to move at right angles to plane of blanket travel |
| 10/16/1991 | EP0298993B1 A turbulence generator for the head box of a paper machine |
| 10/15/1991 | US5057188 Scraper for removing accumulated fibers from slot of papermaking machine |
| 10/15/1991 | US5056565 Paper making drainage belt with funnel-like channels |
| 10/15/1991 | CA1290605C Papermaker's wet press felt having multi-layered base fabric |
| 10/13/1991 | WO1991016492A1 Process for chemically treating papermaking belts |
| 10/13/1991 | WO1991016491A1 Process for solvent delivery of chemical compounds to papermaking belts |
| 10/12/1991 | WO1991015629A1 Method and device for separating a fibre suspension |
| 10/10/1991 | DE4009627A1 Leiste zur nachgiebigen stuetzung eines siebbandes Bar for resiliently supporting a traveling screen |
| 10/09/1991 | EP0451031A1 Process for treating recycled waters intented to dilute a paper pulp |
| 10/09/1991 | CN1055158A Seam for work fabric and the mfg. method |
| 10/08/1991 | US5054525 Double layer forming wire fabric |
| 10/08/1991 | CA1290223C Shower pipes |
| 10/08/1991 | CA1290222C Fourteen harness dual layer weave |
| 10/08/1991 | CA1290181C Sixteen harness dual layer weave |
| 10/07/1991 | CA2039838A1 Treatment process of recycled water to be used for diluting pulp |
| 10/03/1991 | WO1991014826A1 Small rail for flexibly supporting a travelling screen |
| 10/03/1991 | WO1991014558A1 Production of perforate structures |
| 10/02/1991 | EP0449192A2 Single layer fabric for paper making on which plane surfaces of auxiliary weft threads have been formed |
| 10/02/1991 | DE4009628A1 Druckmittel-stuetzeinrichtung Pressure medium stuetzeinrichtung |
| 10/02/1991 | CN1055024A Thin paper forming device for cylinder machine |
| 10/01/1991 | US5053109 Single layer seamed papermakers fabric |
| 10/01/1991 | US5052448 Self stitching multilayer papermaking fabric |
| 10/01/1991 | CA1289798C Forming board for papermaking machine |
| 09/30/1991 | WO1991014813A1 Two-ply papermakers forming fabric |
| 09/27/1991 | WO1991014825A1 Hydraulic supporting device |
| 09/27/1991 | CA2079237A1 Hydraulic support device |