Patent ID: 9417564
Filing Date: 2016-08-16
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: a plurality of rollers including a belt stretched around the plurality of rollers, the belt having an inner surface; and a tension applying unit that applies tension to the belt, wherein the inner surface of the belt has an uneven shape, wherein each respective roller of at least one roller of the plurality of rollers satisfies conditions expressed by μkmax≦0.73 and Δμk=(μkmax−μkmin)≦0.51, where μkmax is a maximum dynamic friction coefficient between the inner surface of the belt and the respective roller, and μkmin is a minimum dynamic friction coefficient between the inner surface of the belt and the respective roller, and wherein each respective roller of the at least one roller satisfies said conditions when a speed of the belt relative to the respective roller is 0.2 mm/s.