Patents
Sitemap › D21 - Paper-making; Production of cellulose › D21B - Fibrous raw materials or their mechanical treatment › D21B 1 - Fibrous raw materials or their mechanical treatment
Patents for D21B 1 - Fibrous raw materials or their mechanical treatment (6,805)
04/1992
04/01/1992EP0478016A2 Device for removing wire from bales, especially bales of waste paper
04/01/1992EP0228396B2 Arrangement for the flocculation of flocculable substances, particularly for the purification of effluents from deinking installations for used paper processing
03/1992
03/31/1992US5100066 Method for processing domestic, industrial and other similar waste with the production of a cellulose material
03/26/1992CA2026102A1 Non-sulfur process for preparing pulp for paper making
03/25/1992EP0371052B1 Split flow ''v'' screen
03/25/1992EP0360807B1 Device at manufacture of fibre pulp
03/17/1992CA1297328C Method and device for refining a fibre material
03/11/1992CA2024935A1 Modified process for preparing pulp for paper making
03/10/1992US5094715 Arrangement for removing thread-like impurities from a defiberizing drum
03/10/1992US5093963 Ductless webber
03/10/1992US5093962 Method of forming webs without confining ducts
03/05/1992WO1992003229A1 Method and apparatus for improving flotation separation
03/04/1992CN1059116A Laminated material and process for mfg. same
03/03/1992CA1296674C Tramp material separator
02/1992
02/12/1992EP0470946A1 Hydrocyclone deinking and removal of sticky contaminants during paper recycling
02/12/1992EP0470929A2 New fungi for pitch reduction, their preparation and use
02/11/1992US5087400 Regulating mixed size of fibers; controlling temperature to cure adhesive binder after forming product
02/10/1992CA2044383A1 Hydrocyclone deinking and removal of sticky contaminants during paper recycling
02/04/1992CA1295308C Chip slicer improvement
02/01/1992CA2047900A1 Fungi for pitch reduction, their preparation and use
01/1992
01/28/1992US5084135 Separation of plastics from paper pulp by flotation and agitat ion, drying and rolling
01/28/1992CA1294742C Polyethylene pulp
01/15/1992CN1015301B Method for removing black skin of cotton stem
01/08/1992EP0465312A1 Screening apparatus for a mixture of paper pulp and contaminants
01/07/1992US5078274 Method and apparatus for wood chip sizing
01/02/1992EP0463271A1 Shear hub
12/1991
12/26/1991WO1991019851A1 Defibering of fibre material
12/12/1991WO1991019040A1 A method of manufacturing pulp
12/08/1991WO1991019066A1 Integrated pulp mill and method of constructing same
12/04/1991EP0459089A1 Flotation deinking system
12/03/1991US5069751 Froth flotation
12/03/1991US5069334 Container
12/01/1991CA2041863A1 Flotation-deinking-device
11/1991
11/12/1991US5064125 Pulper
11/11/1991WO1991017304A1 A method and a device for separating plastic particles from suspensions
11/11/1991WO1991017303A1 Conditioning bales of waste paper for recycling
11/11/1991CA2082504A1 Conditioning bales of waste paper for recycling
11/11/1991CA2063602A1 Method and a device for separating plastic particles from suspensions
11/06/1991EP0454887A1 Procedure for separating plastic particles electrically from solutions, in particular from cellulose and paper fibre solutions
11/05/1991US5062964 Measuring air content of foam
11/05/1991US5062932 Procedure and means for separating plastic particles electrically from solutions, in particular from cellulose and paper fibre solutions
10/1991
10/22/1991US5059280 Method for removing agglomerated particles after dry fiberizing wastepaper
10/22/1991US5058751 Machine for sorting out over-thick wood chips
10/16/1991EP0451348A1 Screw-press
10/01/1991US5052098 Means for removing wires from bales in particular waste paper bales
09/1991
09/24/1991US5051172 Disc screen for material separation
09/24/1991US5051151 Side extraction pulper with screw type rotor
09/18/1991EP0446556A1 A method for fractionation of lignins from steam exploded lignocellulosics to provide fractions with different, but reproducible properties, and some methods for their interconversions and the products so produced
09/17/1991US5048768 Crushing or grinding element for drum refiners
09/17/1991CA1289192C Gap, tram and wear measurement system
09/11/1991EP0445143A1 Device for chip washing
09/03/1991WO1991012902A1 Integrated screening system for sizing wood chips
08/1991
08/27/1991US5042726 Refiner for refining pulp stock
08/27/1991CA1288081C Rotating separator
08/21/1991EP0442222A1 Method and apparatus for wood chip sizing
08/21/1991EP0442183A1 Conversion of pulp and paper mill waste solids to papermaking pulp
08/21/1991CN1013594B Method and apparatus for disintegrating fibrous material
08/20/1991CA1287705C Process for preparing pulp for paper making
08/14/1991WO1991012367A1 Ctmp-process
08/13/1991US5039022 Refiner element pattern achieving successive compression before impact
08/08/1991WO1991011552A1 Method for pulp production
08/06/1991US5037537 Wood particle screen
07/1991
07/30/1991US5035362 Disintegration of wood
07/23/1991US5034099 Apparatus for the manufacture of fiber pulp using a preheater, defibrator and horizontal separator
07/23/1991CA2034567A1 Exploded bark products and methods for making same
07/23/1991CA1286633C Disc screen improvement for chip screen efficiency
07/23/1991CA1286455C High yield chemical pulping
07/11/1991WO1991009707A1 Grindstone
07/10/1991EP0436133A1 The use of neutral paper as a package material for a photosensitive material
07/10/1991CN1013130B Method for producing double gummed paper with full-reed pulp
07/03/1991EP0434851A1 Process of obtaining intact and separated lignocellulosic fibre cores and products so obtained
07/02/1991US5028315 Froth flotation apparatus and method
07/02/1991CA1285526C Drum screen
07/02/1991CA1285412C Sealing bar for centrifugal grinders
06/1991
06/26/1991EP0434382A2 An arrangement for fastening the grindstones of a pulp grinder to a rotatory shaft
06/21/1991CA2031908A1 Arrangement for fastening the grindstone of a pulp grinder to a rotatory shaft
06/19/1991EP0432928A2 Froth flotation apparatus and method
06/12/1991EP0431040A1 A method of treating and a disperger for disintegrating wood pulp, especially containing waste paper.
06/12/1991CA2030420A1 Froth flotation apparatus and method
06/11/1991US5022984 Froth flotation apparatus and method
06/11/1991CA1284799C Method of and means for hydrodynamic mixing
06/05/1991EP0430915A1 Procedure for the production pulp
06/04/1991US5021122 Woodboards
06/04/1991CA1284555C Wood preservative based on copper and zinc acetate
05/1991
05/30/1991WO1991008058A1 Disk screen with compressible spacers and flanged surrounds
05/29/1991EP0429422A1 Procedure for the production of pulp
05/28/1991US5019248 Apparatus for grading fibrous material
05/28/1991CA2030836A1 Procedure for the production of pulp
05/22/1991EP0428257A2 Flotation machine for de-inking
05/22/1991EP0427764A1 Stress regulator for pulp grinding apparatus and method
05/21/1991US5016824 Method and apparatus for controlling the production of thermomechanical pulp
05/18/1991CA2030186A1 Procedure for the production of pulp
05/16/1991WO1991006699A1 Process for mechanical and mechano-chemical manufacturing of pulp
05/16/1991DE3937168A1 Prodn. of biodegradable food packaging material - from cellulosic and starchy vegetable prods. and proteinaceous animal prods.
05/14/1991WO1991007228A1 Apparatus and method for conjoint adjustment of both the inner and outer grinding spaces of a pulp defibrating apparatus
05/14/1991CA2065269A1 Apparatus and method for conjoint adjustment of both the inner and outer grinding spaces of a pulp defibrating apparatus
05/09/1991WO1991007542A1 Hydrolysis of resin in pulp
05/09/1991CA2072993A1 Hydrolysis of resin in pulp
05/07/1991WO1991006700A1 A method of producing cellulosic pulp
05/07/1991US5012933 Machine and method for sorting out over-thick wood chips
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