Patent ID: 9690242
Date: 2017-06-27
CPC Classifications: G03G

Claim:
1. A fixing device comprising: a first rotary body; a second rotary body to contact the first rotary body to form an area of contact between the first rotary body and the second rotary body, through which a recording medium bearing a toner image passes; and a plain bearing that supports the first rotary body or the second rotary body, one rotary body of the first rotary body and the second rotary body having an outer diameter increasing in a curved line from an axial center portion to axial end portions of the one rotary body at least at the area of contact between the first rotary body and the second rotary body, the other rotary body of the first rotary body and the second rotary body having an outer diameter decreasing in a curved line from an axial center portion to axial end portions of the other rotary body at least at the area of contact between the first rotary body and the second rotary body, wherein the recording medium passes between the first rotary body and the second rotary body with a circumferential component of a shear force generated between the first rotary body and the second rotary body by use of the plain bearing being in a range of from 15N to 25N.