Film rewinder
CA 2188094 C · Owner: Yamaguchi, Takuji · Inventors: Yamaguchi, Takuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A film rewinder for rewinding film from a film cartridge to an intermediate cartridge. Its driving unit for rotating the film cartridge spool is also used to drive a tool for separating the film trailing end from the film cartridge spool. The film cartridge has a tool guide so, that the entire device is sufficiently compact. The film rewinder has a film cartridge receptacle and a winding unit for winding the film fed from the film cartridge into the intermediate cartridge. A film guide is provided between the receptacle and the winding unit. The spools of the two cartridges are driven by separate motors independently of each other. The tool is an arcuate member adapted to be pivoted in a …
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 October 17, 1996 and granted November 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2018.
- 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.