Process and apparatus for developing an electrostatic latent image
CA 1079129 A · Owner: Hoechst Aktiengesellschaft · Inventors: Holz, Rudolf; Haberhauer, Helmuth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for developing an electrostatic latent charge image is disclosed. Adherence of toner to image-free portions on copies of different background brightness is prevented by controlling the voltage applied to the developing electrode before the image-free portions emerge from the developing zone. The voltage is controlled based on background voltage measurements made by the developing electrode. An apparatus is disclosed for developing electrostatic latent images according to the inventive process of the invention wherein a capacitive member which stores background voltage is connected to an amplifier circuit. The circuit is connected to the developing electrode for controlling 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 June 10, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.