Fusing unit and image forming apparatus including the same

摘要

A fusing unit and an image forming apparatus to form an image on a recording medium including a fusing unit are provided. The image forming apparatus includes a heating member having a surface divided into a plurality of heating regions and heating the recording medium, and a pressurizing member to apply pressure to the recording medium, the fusing unit fusing the image to the recording medium by applying heat and pressure to the recording medium, a driving unit to supply rotational force to the pressurizing member, and a power supply to supply power to the heating member and the driving unit, wherein the heating regions have different heating values per unit area. The image forming apparatus prevents overheating of a paper-contact heating region without idling the fusing unit in order to radiate heat accumulated in the paper-contact heating region.

主权项

1. A fusing unit to fuse an image to a recording medium by applying heat and pressure to the recording medium, the fusing unit comprising:
a heating member to heat the recording medium; and a pressurizing member to apply pressure to the recording medium, wherein the heating member is divided into a paper-contact heating region contacting the recording medium and a paper non-contact heating region not contacting the recording medium, and a heating value per unit area of the paper-contact heating region is different from a heating value per unit area of the paper non-contact heating region, the heating member comprising a heating layer to generate heat to enable heating of the recording medium, the heating layer comprising polyimide containing carbon nanotubes (CNTs), and a mixture ratio between the polyimide and the CNTs in the paper-contact heating region and a mixture ratio between the polyimide and the CNTs in the paper non-contact heating region is different.