Film cartridge viewer
CA 1051236 A · Owner: Montron Corporation · Inventors: Ciupke, Werner W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cartridge viewer having means forming a framework with indexing means mounted thereon. The indexing means has an aperture therein and a pair of spaced apart index projections disposed on opposite sides of the aperture. A continuous length of film having perforations along one edge thereof is provided. Guide means is provided for guiding the film over the indexing means and past the aperture. A sprocket engages the film. A drive member is rotatably mounted in the framework and is connected to the sprocket for driving the sprocket and advancing the film past the aperture. Crank means accessible from the exterior of the framework is provided for rotating the drive member. The spool is …
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 March 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 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
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.