Fixing device having a curl compensation capability
CA 2102977 C · Owner: Nec Corporation · Inventors: Asada, Hidekazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a fixing device for use in image recording apparatuses, wherein the toner-adhering face of a sheet (100) onto which toner has been transferred is heated by a heating roller (30) to fix the toner. A pressure roller (20), pressing itself against the heating roller, assists in the heat-fixing process. In order to compensate for the curl resulting from the heat of the heating roller (30), a curl correcting roller (40) heats the back side of the sheet (100) with heat transmitted from the heat conducting part (31) of the heating roller (30) to another heat conducting part (41). This configuration dispenses with a built-in heat source which the curl correcting …
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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 November 12, 1993 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2015.
- 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.