Patent ID: 7347318
Filing Date: 2008-03-25
Classification: B41J,G03G

Abstract:
1. An image forming device, comprising: a main unit; an image bearing body which bears a developer image thereon and which is provided in the main unit; a belt unit detachably mounted in the main unit and having a pair of supporting rollers supporting an endless belt thereon, the endless belt having an inner circumference side that confronts the pair of supporting rollers and an outer circumference side opposite to the inner circumference side, the outer circumference side of a part of the endless belt defined between the pair of supporting rollers along an arrangement direction, in which the pair of supporting rollers are arranged, confronting the image bearing body when the belt unit is mounted in the main unit; and a tension-applying mechanism that is provided in the main unit and that, when the belt unit is mounted in the main unit, urges one supporting roller among the pair of supporting rollers in a direction of separating the one supporting roller away from the other supporting roller, thereby applying tension to the endless belt.