Toner pack for use with the developing device and method of filling up toner from the toner pack to the developing device
CA 2066141 C · Owner: Tsuji, Shinji · Inventors: Tsuji, Shinji; Fukasawa, Jiro; Ishikawa, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A toner pack for use with the developing device includes a toner box in which toner is stored and which is detachably set at the developing device an endless, seal sheet a portion of which is peelably bonded to the toner box to cover an opening of the toner box a flat, cylindrical cover member through which that portion of the endless seal sheet which does not cover the opening of the toner box is freely movably passed and a pull, portion which is freely movably passed through the cover member and one end of which is made continuous from the endless seal sheet.
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 April 15, 1992 and granted October 18, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2014.
- 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.