| Patents for D21F 1 - Wet end of machines for making continuous webs of paper (14,078) |
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| 08/26/1993 | DE4204915A1 Reprocessing waste paper - in presence of peroxide(s) with mixts. of polyfunctional carboxylic acids and polymeric cpds. as flotation stabilisers |
| 08/25/1993 | EP0557157A1 Sheet provided with watermark-like markings |
| 08/25/1993 | CN1075516A Double-cylinder sieve enclosed shaping apparatus for paper |
| 08/24/1993 | US5238536 Multilayer forming fabric |
| 08/24/1993 | US5238027 Papermakers fabric with orthogonal machine direction yarn seaming loops |
| 08/19/1993 | WO1993016220A1 Weave shed formation apparatus |
| 08/17/1993 | US5236090 Flotation-deinking-device |
| 08/17/1993 | CA1321310C Head box for a paper machine or the like |
| 08/11/1993 | EP0554336A1 Textile for use as a paper machine. |
| 08/11/1993 | EP0554285A1 Process for recovering raw materials from paper-industry mechanical waste sludges. |
| 08/07/1993 | WO1993016221A1 Multi-ply papermaking fabric |
| 08/04/1993 | EP0553501A2 Papermakers fabric with flat machine direction yarns |
| 08/03/1993 | CA1320860C Headbox |
| 07/29/1993 | DE4306503A1 Fourdrinier water removal bar - has angular setting through claw mounting on support profile |
| 07/29/1993 | DE4305688A1 Suspension flow throttling - uses a hollow zone with different cross=section parts for flow resistance to be varied between them |
| 07/27/1993 | US5230371 Papermakers fabric having diverse flat machine direction yarn surfaces |
| 07/21/1993 | EP0552139A1 Web former for a paper machine |
| 07/21/1993 | EP0551970A1 Pitch control |
| 07/21/1993 | EP0551832A1 Coating of yarn bundles, process for their manufacturing and textile made thereof |
| 07/20/1993 | CA1320410C Papermakers' double layer type fabrics |
| 07/14/1993 | CA2059256A1 Pitch control |
| 07/13/1993 | CA1320066C Shaped monofilament coil seam and fabrics |
| 07/08/1993 | WO1993013262A1 Gravity type pulp washer or thickener |
| 07/08/1993 | WO1993013251A1 Polymeric monofilament and felt made therefrom |
| 07/08/1993 | CA2126239A1 Gravity type pulp washer or thickener |
| 07/08/1993 | CA2123793A1 Polymeric monofilament and felt made therefrom |
| 07/07/1993 | EP0549917A1 Absorbing felt |
| 07/06/1993 | US5225270 Compatibilized polyphenylene ether/polyamide monofilament and felt made therefrom |
| 07/06/1993 | US5225269 Press felt |
| 07/06/1993 | US5225042 Twin wire paper forming section with heated air pressure domes |
| 07/06/1993 | CA1319879C Cloth for a paper machine |
| 06/30/1993 | EP0549384A1 Method of manufacturing paper comprising reduced thickness and transparently in local zones and the paper obtained therefrom |
| 06/30/1993 | EP0549147A1 Press fabrics for paper machines |
| 06/29/1993 | CA1319621C Method and equipment for filtration of suspension |
| 06/29/1993 | CA1319554C Weft-wear type papermakers' fabric |
| 06/24/1993 | DE4141607A1 Doppelsiebformer A twin |
| 06/22/1993 | US5221438 Supporting device for dewatering elements |
| 06/22/1993 | CA1319289C Single layer pin seam fabric having perpendicular seaming loops and method |
| 06/18/1993 | WO1993012292A1 Twin-wire former |
| 06/18/1993 | WO1993012291A1 Twin-wire former |
| 06/18/1993 | CA2104299A1 Twin-wire former |
| 06/18/1993 | CA2104230A1 Twin-wire former |
| 06/17/1993 | DE4141139A1 Woven paper-making blanket - is of monofilaments with a trapezoid cross=section in at least one group for wefts and warps |
| 06/17/1993 | DE4140657A1 Paper machine headbox - has an arrangement of additional fluid supply tubes with variable flow control |
| 06/16/1993 | CN2136265Y Xuan paper machine |
| 06/15/1993 | US5219004 Multi-ply papermaking fabric with binder warps |
| 06/15/1993 | CA1319078C Wire and felt cleaning |
| 06/10/1993 | WO1993011298A1 Controlled jet injection apparatus for a papermaking machine headbox |
| 06/09/1993 | EP0545886A1 Method and device for draining a fibre suspension with a drainage element |
| 06/09/1993 | EP0458799B1 A forming apparatus for forming a web from stock |
| 06/08/1993 | US5217577 Wire-link belt |
| 06/08/1993 | US5217415 Papermakers and like fabrics |
| 06/08/1993 | CA1318865C Stabilizing pressure and flow conditions in a screening apparatus |
| 06/08/1993 | CA1318830C Method of manufacturing an insertion-type seam for making a cloth belt endless, and seaming machine |
| 06/03/1993 | DE4139105A1 Use of zirconium di:oxide ceramic contg. spinel, magnesium and/or yttrium oxide(s) - as wear part in paper machines, as wire and thread take-up parts, and as high pressure pistons in fluid pumps |
| 06/02/1993 | EP0544611A1 Installation to make security documents and security documents made in such an installation |
| 06/02/1993 | EP0544167A1 Papermaking fabric, in particular dryer felt |
| 06/02/1993 | CN2135014Y Improved horizontal arranged multiple fourdrinier wire paper-making machine |
| 06/01/1993 | CA1318536C Apparatus for holding a partition lamella or element or the like |
| 05/27/1993 | WO1993010304A1 Fabric for papermaking machines and the like |
| 05/27/1993 | WO1993009942A1 Multilayer felts |
| 05/27/1993 | CA2123883A1 Fabric for papermaking machines and the like |
| 05/26/1993 | EP0542835A1 Method and apparatus for improving flotation separation |
| 05/26/1993 | CN2134417Y Suction box plate |
| 05/25/1993 | US5212858 Apparatus for capturing and stabilizing a yarn |
| 05/25/1993 | CA1318219C Double-layered fabric for paper making machines having a coarse-structured bottom side and a fine-structured forming side |
| 05/25/1993 | CA1318165C Base fabric structures for seamed wet press felts |
| 05/19/1993 | DE4239845A1 Paper-making inlet correction - uses correlated measurements from start and end of water extraction stage to calculate the settings |
| 05/19/1993 | DE4237841A1 Stenter frame - has spring held chairs to prevent the cloth being drawn out of shape during a heat process |
| 05/19/1993 | CN2133608Y Single piston rod cylinder net-washing device |
| 05/18/1993 | US5211814 Wire loading device in a paper machine |
| 05/18/1993 | US5211335 Nozzle for spray tubes |
| 05/18/1993 | CA1317808C Extended nip press belt guide |
| 05/18/1993 | CA1317807C Procedure and means in the wire section of a paper machine |
| 05/13/1993 | WO1993009286A1 A headbox apparatus |
| 05/13/1993 | DE4136531A1 Paper machine head-box producing high quality paper - has stationary turbulence generator with feed tubes of decreasing dia. leading to relaxation and expansion chamber to clear adhered particles in suspension for depositing on wire |
| 05/12/1993 | EP0541457A1 Apparatus and method for the on-line control of the filler content of a paper product |
| 05/12/1993 | CN1071981A Headbox apparatus |
| 05/11/1993 | US5209807 Papermakers fabric for corrugation machines |
| 05/11/1993 | CA1317552C Effective diffuser/thickener screen backflushing |
| 05/05/1993 | CN2131892Y Reciprocative flusher |
| 05/05/1993 | CA2081581A1 Apparatus and method for the on-line control of the filler content of a paper product |
| 05/04/1993 | US5207873 Anti-contaminant treatment for papermaking fabrics |
| 05/04/1993 | CA1317142C Tessellated papermakers fabric and elements for producing the same |
| 04/29/1993 | WO1993008327A1 Method for making sheet materials and security paper |
| 04/29/1993 | DE4235184A1 Sheet prodn. process for producing watermarks in thermal printer - involves heating proof material carrying film in dot form to transmit proof material to sheet |
| 04/29/1993 | DE4233910A1 Paper-making blanket cleaner - has jet to deliver warm moist air to blanket surface |
| 04/29/1993 | CA2121597A1 Method for making sheet materials and security paper |
| 04/28/1993 | EP0539027A2 Adjustable angle foil for paper making machine with rigid foil body and cam actuation means |
| 04/28/1993 | CN1071470A Apparatus and method for making cellulosic fibrous structures |
| 04/27/1993 | CA1316795C Dual warp forming fabric |
| 04/21/1993 | EP0537142A1 Method and apparatus for manufacturing multilayer filter material. |
| 04/21/1993 | EP0537141A1 Turbulence roll for a web former. |
| 04/21/1993 | EP0537140A1 Method and apparatus for manufacturing multilayer filter material. |
| 04/20/1993 | US5204150 Loop formation in on-machine-seamed press fabrics using yarns comprising mxd6 polyamide resin material |
| 04/20/1993 | US5203967 Twin-wire former in a paper machine |
| 04/20/1993 | CA1316385C Suction box cover with modular components |
| 04/20/1993 | CA1316383C Horizontal twin wire machine |
| 04/15/1993 | WO1993007338A1 Woven papermakers fabric having a unibody seam and a method for making the same |
| 04/15/1993 | WO1993007336A1 A saveall apparatus |