Developing drum
CA 1237934 A · Owner: Ciba-Geigy Ag · Inventors: Brent, Richard J.; Pilkington, Ian B.; Moss, Brian F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus is described for the processing of a film contained in a cassette. The cassette comprises a substantially cylindrical body formed with a light-tight, longitudinally extending film exit slot end caps to the body and a spool held between the caps and having the film wound thereon. The apparatus comprises a light-tight enclosure, preferably in the form of a columnar body, provided with means shaped to receive and retain the cassette body and provided with a space sufficiently large to receive from the cassette the spool with the film wound thereon. A plunger is provided for engaging the spool of the cassette and for moving it to force an end cap off the cassette body and to move the …
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 June 14, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2005.
- 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.