Electrophotographic contact duplicating apparatus and method
CA 1091749 A · Owner: Coulter Systems Corporation · Inventors: Kuehnle, Manfred R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for contact duplicating images on one strip roll upon a strip roll of electrophotographic film. The electrophotographic film is coated with a very thin layer of insulating hydrocarbon before the contact occurs to prevent static discharge when the films separate. The strips of the two rolls are brought into contact and fed to a projection station where a light beam is projected onto and through the contacted films. The electrophotographic film is charged just before it contacts the photographic film. A toning station and a fixing station respectively are located to act upon the electrophotographic film after exposure. Transfer of the toned image to a strip of clear base film is …
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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 December 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 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.