Patent ID: 11934127
Assignee: OKI ELECTRIC INDUSTRY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A fixation device comprising:
an annular belt with an outer peripheral surface that is configured to move at a predetermined speed and including an elastic layer with a thickness of more than 300 μm; and
a counter member that is opposite the outer peripheral surface of the annular belt and forms a nip region with the annular belt, wherein
a ratio (A/B) of a first hardness value (A) to a second hardness value (B) of the annular belt is 0.566 or more, where the first hardness value (A) is a value as measured, in hardness measurement of the outer peripheral surface using a hardness meter, at a first time point when a measurement time corresponding to a passage time has just passed since a start of the hardness measurement, and the second hardness value (B) is a value as measured, in the hardness measurement, at a second time point when the measured value of the hardness meter has just been saturated, wherein the passage time is a time it takes for a certain point of the outer peripheral surface to pass through the nip region, and
the ratio (A/B) of the annular belt is 0.698 or less.