Apparatus and method for solidifying smelt into thin sheets
CA 1052521 A · Owner: Envirotech Corporation · Inventors: Casten, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pair of horizontally-disposed water-cooled drums are mounted side-by-side so that the nip between the drums forms a reservoir for receiving molten smelt of the type which is derived from paper pulping processes. The nip gap is set between 0.005 and 0.025 inches, and the drums are rotated downward through the reservoir while concurrently cooling the drums to reduce the localized temperature of the smelt at the nip to its freezing temperature and to remove the heat of fusion of the smelt. A thin, brittle sheet of solidified smelt issues from between the drums and the sheet is free from the surface of either drum.
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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 April 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 1996.
- 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.