Fixing device having a curl compensation capability
AssigneeNEC Corporation
InventorHidekazu Asada
Life of this patent
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Abstract
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 roller (40) would otherwise need.
Claims7
A fixing device for fixing toner, transferred onto a sheet of paper by an image recording apparatus, comprising:
- a heating roller for feeding said sheet and heating its surface onto which toner has been transferred;
- pressure means pressing itself against said heating roller with said sheet intervening in-between;
- and
- a curl correcting roller, in contact with a reverse side of the surface to which the toner has been transferred, for heating said reverse side of the surface with heat conducted through contact with part of said heating roller, wherein
- said heating roller and said curl correcting roller have heat conducting parts in contact with each other.
Dependencies are inferred from the claim text.