Developing unit for an electro-photographic apparatus
CA 1279088 C · Owner: Hino, Toshio · Inventors: Hino, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A developing unit for an electro-photographic apparatus is described, including a toner concentration sensor provided between a paddle roller and a developing roller near the bottom of the casing. The sensor generates a toner concentration signal with high sensitivity but without substanial fluctuation. In contrast, the sensor in conventional developing units is located above the developing roller on a doctor blade and this gives rise to a fluctuating output signal.
Read the whole patent
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 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 2008.
- 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.