Bias device for a copying machine
CA 1115333 A · Owner: Ricoh Co. Ltd. · Inventors: Okamoto, Toyoo; Kuno, Masashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a bias device for a copying machine the surface, potential of the photo-sensitive member is detected and stored, a bias voltage is obtained by superposing a certain potential on the potential thus stored the surface, potential of an electrode confronting the photo-sensitive member is stored in a non-image period occurring with the photo-sensitive member, and the bias voltage is applied to the electrode in an image period occurring with the photo-sensitive member, whereby troubles due to the residual voltage of the photo-sensitive member are effectively overcome.
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 December 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 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.