Method and device for the electropneumatical testing of the air permeability in cigarettes
CA 1165587 A · Owner: Sasib S.P.A. · Inventors: Pezzi, Giovanni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for the electropneumatical testing of the air permeability wherein each cigarette is subjected to at least one test consisting of applying pneumatic pressure to one end of the cigarette and determining the resistance or the pressure drop at the input to the cigarette. The measured pneumatic pressure is transformed into electric measurement signals which are compared with electric reference or threshold signals. According to the invention the, electric measurement signals are compared with the electric reference signals which are shaped as sawtooth signals and are generated in synchronism with the cigarette tests, that is with the measurement signals. The ascending portions of the …
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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, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 2001.
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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.