Apparatus for defibrating and conditioning nonflowable cellulosic material
CA 1082021 A · Owner: Mo Och Domsjo Aktiebolag · Inventors: Eriksson, Erik F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus is provided for the defibration and conditioning of nonflowable cellulosic material, comprising a housing having an inlet and an outlet and a flow chamber for cellulose material therebetween; two screws disposed in the chamber and extending from the inlet to the outlet, the screws having interdigitating helical blades with opposed pitches, and helical grooves therebetween receiving the helical blades of the opposite screws; the screws being arranged for interdigitating rotational movement in opposite directions so as to defibrate and, condition cellulosic material in the bite therebetween while carrying the material through the flow chamber from the inlet towards the outlet; at …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 22, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.