Motion picture projection apparatus
CA 2113400 A1 · Owner: Iwerks Linear Loop Projectors, Inc. · Inventors: Schmidt, Leland R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Motion Picture Projection Apparatus, Abstract A motion picture apparatus for the projection of motion picture film which advances the film through the projection sequence by forced air. The film is initially placed into successive looped configurations formed by a cam-driven flipper. The loops and thus the film are advanced through the projector pathway by a forced air blower which propels the loop through a projection pathway. Vacuum pressure is also applied to the film through a gate to secure the film to a gate with linearly arranged register pins steadying the film over a projection aperture. The film is rewound through the projector by a motorized rewind with a positive pressure …
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
- Filed January 13, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2016.
- 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.