| US 7,499,669 B2 | ||
| Transfer unit and image forming apparatus | ||
| Tomoya Adachi, Osaka (Japan); and Atsushi Takehara, Kyoto (Japan) | ||
| Assigned to Ricoh Company, Ltd., Tokyo (Japan) | ||
| Filed on Jan. 08, 2007, as Appl. No. 11/620,930. | ||
| Claims priority of application No. 2006-003225 (JP), filed on Jan. 11, 2006. | ||
| Prior Publication US 2007/0160396 A1, Jul. 12, 2007 | ||
| Int. Cl. G03G 15/01 (2006.01) | ||
| U.S. Cl. 399—302 [399/308] | 7 Claims |
| 1. A transfer unit comprising:
a plurality of image carriers on which latent images of different colors are formed, respectively;
an intermediate transfer belt of an endless type, on which the latent images are superimposed to form a full color toner image;
a tension roller that maintains a tension of the intermediate transfer belt;
a driving roller that drives the intermediate transfer belt;
a biasing unit that applies the tension to the tension roller;
a holding unit that holds the tension roller; and
an image reading sensor that detects the toner image formed on the intermediate transfer belt, wherein
the image reading sensor is disposed in the holding unit, in an opposite position to the tension roller with respect to the
intermediate transfer belt.
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