Apparatus for monitoring particulate materials
CA 1165202 A · Owner: British-American Tobacco Company Limited · Inventors: Bryant, Robert G. W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for monitoring the amount of particulate material, especially tobacco, being conveyed in a stream thereof, comprising material-contacting means mounted so that it extends across the stream of material in contact with the surface thereof and is free to rise and fall with changes in the depth of the stream, and means for detecting movement of said contacting means caused by such changes the contacting means having projections by which movement of the stream causes the contacting means to rotate. Suitably the material-contacting means comprises a freely rotatable roller (12) with surface ribs (13) extending across a conveyor (3) for the stream of material and supported by …
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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 10, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2001.
- 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.