Cascade development station having a roughened development plate for enhancing developer mixture turbulence
CA 1047757 A · Owner: Itek Corporation · Inventors: Buchan, William R.; Genthe, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A special inexpensive development electrode within a cascade development station is positioned closely adjacent to a xerographic drum. The plate is roughened by producing protuberances thereon forming a waffle-like or diamond-shaped knurled pattern for impeding free fall of the development powder and for causing the development mixture to have considerable motion radially with respect to the drum, which in turn greatly increases the number of development events, increases the quantity of toner made available within the development station for a fixed supply of development mixture to increase the copy output rate of the machine and which more effectively scavenges toner on background …
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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 February 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 1996.
- 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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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.