| 摘要 |
PROBLEM TO BE SOLVED: To prevent cracking of a heated body and improve in fixing property when a film heat type fixing device runs away, when small-sized paper is passed, etc. SOLUTION: The fixing device is characterized in that the heated body 73 has a resistance heating element formation region Wh where a resistance heating element 73b is formed on one surface side of a ceramic base material 73a; a heated body support 71 has a heated body seating face region 71a where the heated body is supported in such a way that the heated body is caused to abut on a surface of a fixation nip N perpendicularly to the surface and clamped by the surface and the region 71a, wherein the heated body seating face region 71a has a resistance heating element formation part seating face region Wg which abuts on the heated body 73 to support it within a range wherein at least the resistance heating element formation region Wh is covered; and in the positional relationship in a recording material conveying direction A between the heating element formation region Wh, resistance heating element formation part seating face region Wg and fixation nip N, the resistance heating element formation region Wh is included in the inward sided of the resistance heating element formation part seating face region Wg and the resistance heating element formation part seating face region Wg is included in the inward side of the fixation nip Wn (Wh≤Wg≤Wn). COPYRIGHT: (C)2006,JPO&NCIPI |
