Center filling variable volume film drum
CA 1088797 A · Owner: Photo Systems, Inc. · Inventors: Chapman, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a variable volume film drum with a proportionally variable length conduit path for directing and controlling the flow of fluids introduced into the drum. The center conduit path is comprised of interconnecting conduit reels also used to hold the film. Each conduit reel has an internal conduit path one end of which forms an outwardly extending flange or male portion and the distal end forms a receiving or female portion. As the volume of the container is varied to accommodate more or less reels, the conduit path formed by the interconnected reels is proportionally altered. The conduit reels are further connected to a fluid inlet tube in the film drum to …
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 November 4, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 4, 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.