Patent ID: 7549635

Claim:
A paper conveyance apparatus comprising: an endless type conveyance belt having first and second surfaces, a sheet of paper being to be placed on one of the first and second surfaces; a driving unit that drives the conveyance belt; a first roller that is in contact with the first surface of the conveyance belt; a second roller that is in contact with the second surface of the conveyance belt, the first roller and the second roller nipping the conveyance belt therebetween; a first biasing mechanism that biases at least one of the first roller and the second roller so that the first roller and the second roller come close to each other; and an encoder that detects a rotation position of the first roller, wherein: at least one of the first roller and the second roller is in contact with at least one of the first and second surfaces of the conveyance belt in a region outside a paper passing region where a conveyed sheet of paper passes and the first roller and the second roller nip the conveyance belt therebetween only in the region outside the paper passing region.