Bronzing unit and procedure
CA 1092903 A · Owner: Rothmans Of Pall Mall Canada Limited · Inventors: Kirchner, Erich J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The bronzing of cigarette paper is achieved by impinging finely-divided metal or other particles suspended in an air stream against the surface desired to be bronzed and bearing an outline in wet adhesive of the desired pattern. Some of the metal particles adhere to the adhesive to provide the desired bronzing. The impinging application of the air conveyed particles is achieved by passing the air conveyed particles through the application zone in a generally spiral path while the band moves in a generally rectilinear path with the one face of the paper band intersecting the spiral path. In this way the paper, band is repeatedly engaged by the air-conveyed metal particles during the passage …
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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 January 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 6, 1998.
- 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.