Long distance film advance mechanism
CA 1087895 A · Owner: Polaroid Corporation · Inventors: Douglas, Lawrence M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Photographic apparatus has a film advance mechanism that advances the foremost film unit from within a cassette of stacked units by a major distance far longer than an access slot conventionally provided on the cassette for a short index-, like film advance. In a self-developing camera the long, advance can move an exposed film unit from the image surface to remotely-located spread rollers that initiate film processing. The advance mechanism engages the film unit in a manner that avoids conventional structural limitations on the length of the advancing travel. One embodiment introduces a pick arm, which drivingly engages a back edge of the film unit, into the film cassette under a marginal …
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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 October 21, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 21, 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.