Magnetic brush type developing apparatus
CA 1201583 B · Owner: Kabushiki Kaisha Toshiba · Inventors: Nomura, Yutaka; Koyama, Mitsuaki; Katou, Masahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A developing apparatus for an electrostatic copying machine includes a cylindrical drum having a photosensitive layer provided around the outer peripheral surface thereof, and a magnetic roller mounted within a receptacle, having stationary magnetic poles arranged in a body thereof and a rotating cylindrical sleeve provided on the outer peripheral surface of the body thereof. The receptacle holds a developer capable of forming a magnetic brush and has a window to expose the magnetic brush so that it can contact the drum where the magnetic roller and the drum face each other with a narrow gap left therebetween. The magnetic roller continuously moves the developer in the form of a magnetic …
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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 October 21, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 21, 1997.
- 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.