Patents
Sitemap › D21 - Paper-making; Production of cellulose › D21H - Pulp compositions; Preparation thereof not covered by subclasses ,; Impregnating or coating of paper; Treatment of finished paper not covered by class or subclass; Paper not otherwise provided for › D21H 23 - Processes or apparatus for adding material to the pulp or to the paper
Patents for D21H 23 - Processes or apparatus for adding material to the pulp or to the paper (8,452)
10/1991
10/08/1991CA1290108C Process for the production of paper
09/1991
09/25/1991EP0447420A1 Procedure and means for coating a paper web in at least two steps
09/24/1991CA1289399C Method for the manufacture of coloured egg packages, apparatus for carrying such a method into effect and egg packages manufactured by this method
09/17/1991US5049420 Carbonless copying, pressure sensitive
09/17/1991US5048453 Coating device
09/11/1991EP0446138A1 Process for making paper for filterbags and product
09/11/1991EP0445953A1 Cationic polymer-modified filler material, process for its preparation and method for its use in papermaking
09/10/1991US5047120 Method for manufacture of lightweight frothed mineral wool panel
09/04/1991EP0444819A2 Varnish impregnation method and apparatus
09/04/1991EP0422163A4 Method for manufacturing a mineral wool panel
09/04/1991EP0332618B1 Method of making soft paper
08/1991
08/17/1991WO1991012373A1 Coating head for applying a coating suspension layer on a paper sheet
08/14/1991EP0441234A1 Plastic coated paper or cardboard
08/14/1991EP0339032B1 Coating apparatus and method
08/07/1991EP0440279A1 Curtain coater for photographic elements
08/01/1991DE4002256A1 Cardboard web coating - has grooved roller spreader and web guide roller to give thin in layer of coating mass
07/1991
07/31/1991EP0438743A1 Coating process and apparatus for coating a moving web of paper or paperboard
07/30/1991US5035196 Apparatus for controlling the tilt angle of a doctor blade
07/27/1991CA2035061A1 Coating process and applicator device for coating running webs of paper or cardboard
07/23/1991WO1991010777A1 Process for sizing paper and similar products
07/23/1991CA2074085A1 Process for sizing paper and similar products
07/18/1991DE4100771A1 Applicator for coating strip material - comprises two rollers in bath, continuous belt passing over curved support pressed by pressure tube towards large roller supporting strip
07/16/1991US5032227 Production of paper or paperboard
07/16/1991US5032226 Base paper for photographic layer support
07/16/1991US5032225 Thermosensitive
07/16/1991US5031569 Apparatus for coating a travelling web
07/13/1991CA2034073A1 Applicator apparatus
07/10/1991EP0436172A1 Coating apparatus
07/09/1991US5030833 Method and device for detecting objects containing fluorescent substances
06/1991
06/11/1991US5023138 Adhesive tapes, release agents
05/1991
05/28/1991US5018478 Method and apparatus for coating a paper web
05/22/1991EP0427924A2 Doctor roll for the volumetric dosing of a coating material
05/22/1991EP0427887A1 A coater apparatus
05/22/1991EP0406354A4 Composite fiberboard and process of manufacture
05/15/1991CA2026897A1 Doctor bar for the volumetric metering of flowable materials onto a travelling web
05/14/1991US5015500 Roll coater with perforated deckles
05/14/1991US5015334 Colloidal composition and its use in the production of paper and paperboard
05/09/1991WO1991007350A1 Silica sols, a process for the production of silica sols and use of the sols
05/08/1991EP0426606A2 Short dwell coater apparatus
05/08/1991EP0425975A1 A process for wetting a paper web and microcapsules used in the process
05/07/1991CA1283761C Paper production
05/02/1991EP0425067A2 Apparatus for applying a coating to a surface of a substrate
04/1991
04/30/1991US5010840 Short dwell coater apparatus
04/24/1991EP0423492A2 Metering device for metering coatings for paper or cardboard webs
04/24/1991CN1050915A Method for regulation of moisture profile of paper or board web in size press and film size press that carries out method
04/23/1991US5009747 Water entanglement process and product
04/18/1991WO1991005108A1 Fibres of increased specific surface area, a method for their manufacture, fluff pulp consisting of such fibres and the use of the fibres as absorption material
04/18/1991WO1991005106A1 Aluminium-salt impregnated fibres, a method for their manufacture, fluff consisting of such fibres, and the use of the fibres as absorption material
04/17/1991EP0422163A1 Method for manufacturing a mineral wool panel.
04/16/1991US5008306 Mixing aqueous dispersion of ionic dispersant and fibers and second, oppositely charged, dispersion of polymer powder; adding high molecular weight ionic polymer flocculant, draining, drying
04/16/1991CA1282912C Process for forming a sheet of material
04/10/1991EP0421172A1 Method of clouring or tinting paper
04/02/1991US5004645 Barrier products
04/02/1991US5004628 Controlled application of polyacrylamide solution onto moving web; uniformity
03/1991
03/27/1991EP0418476A2 Apparatus for coating a webmaterial moving around a counter roll
03/26/1991US5002800 Process for producing photographic resin-coated paper by oscilating the die of the extruder to extrude molten resin, and apparatus for the same
03/20/1991EP0417368A1 Method for making coated and printed packaging material on a printing press
03/20/1991EP0374196A4 Method of reducing pitch in pulping and papermaking
03/12/1991US4998500 Squeegee device
03/12/1991CA2016262A1 Process for sizing calcium carbonate-containing papers with resin size dispersions
02/1991
02/21/1991WO1991002119A1 Treatment of fibrous materials
02/20/1991EP0413095A2 Roller squeegee
02/19/1991US4993352 Squeegee device
02/19/1991CA1280257C Hydrophilic cellulose product and method of its manufacture
02/18/1991CA2018990A1 Coater for a web of material that travels around a backing roll
02/06/1991EP0411752A1 Method for hydroentangling non-woven fibrous sheets
02/06/1991EP0411196A1 Coating apparatus
02/06/1991CN1011519B Process for making paper
02/05/1991CA1279880C Security paper for currency and banknotes
01/1991
01/30/1991EP0409836A1 Method for fabricating paper for bottle labels
01/23/1991EP0409525A2 Apparatus and method for making pressboard from poly-coated paper using relative movement of facing webs
01/20/1991CA2021479A1 Doctor bar
01/09/1991EP0406529A2 Coating device
01/09/1991EP0406354A1 Composite fiberboard and process of manufacture.
01/02/1991EP0406039A1 Process for making fibrous sheet products from cellulose by a paper-making process, said products being enriched with elastomeric resins
01/02/1991CA1278403C Production of paper and cardboard
01/01/1991US4981726 Method and apparatus for dispensing coating materials on a moving substrate with a smoothing member and supporting structure
12/1990
12/25/1990US4980207 Applicator for coating traveling paper webs and coating process
12/22/1990CA2019703A1 Coating device
12/19/1990EP0402589A2 Coating apparatus
12/19/1990EP0402513A1 Process for making highly compressed paper containing synthetic fibres, with a volumetric weight equal to or greater than 0,84 kg/dm3
12/18/1990CA1277809C Papermaking process
12/10/1990CA2018431A1 Coating device
11/1990
11/28/1990EP0399147A2 Coating device for a strip around a roller
11/27/1990US4973441 Method of manufacturing a compressibility gradient in paper
11/22/1990CA2017140A1 Device for coating a web of material traveling around a backing roll
11/20/1990CA1276412C Loaded paper
11/13/1990US4969976 Pulp dewatering process
11/13/1990US4969975 Dispersion, depositing and drainage on foraminous support
11/07/1990EP0396256A2 High quality extrusion coated paper
11/06/1990US4968534 Continuous processing
10/1990
10/23/1990US4964955 Method of reducing pitch in pulping and papermaking operations
10/23/1990US4964954 Process for the production of paper
10/23/1990US4964364 Apparatus for coating a web with coating mix
10/18/1990WO1990012169A1 Method for manufacturing a mineral wool panel
10/17/1990EP0301061B1 Applicator with rolling scraper for applying coatings on webs of material
10/16/1990US4963603 Slurrying, flocculating, molding mineral wool, perlite, clay, cellulosic newsprint and polymeric binder; moisture resistant, no sag
10/10/1990CN1045932A Coater apparatus
10/09/1990US4961968 Short dwell coater apparatus with backing blanket disposed between blade and guide roll
10/09/1990US4961825 Papermaking process
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