Samsung Electronics Co., Ltd.

Won-chul Jung

Do-geun Kim

Myung-ho Kyung

Sun-woo Lee

An image forming apparatus includes an intermediate transfer belt; a plurality of photosensitive bodies on which a toner image is formed, wherein the photosensitive bodies are disposed to contact the intermediate transfer belt so as to form respective transfer regions which are used to transfer the toner image to the intermediate transfer belt, wherein a first photosensitive body is disposed in the most upstream side in a proceeding direction of the intermediate transfer belt, and a transfer current density of the first transfer region is greater than a transfer current density of the remaining transfer regions.

Image forming apparatus and method of performing same

An image forming apparatus to form an image in a single pass includes a plurality of image carriers, a transfer belt to receive developer images from the image carriers, a plurality of primary transfer rollers disposed to be offset from the image carriers along the transfer belt, respectively, a backup roller disposed adjacent to the last one of the primary transfer rollers disposed most-downstream in a rotating direction of the transfer belt, and a secondary transfer roller to transfer the developer images from the transfer belt to a printing medium, the secondary transfer roller being disposed opposite to the backup roller to interpose the transfer belt therebetween. The backup roller has a resistance in the range of 5 to 50 M&#x3a9;.

Image forming apparatus

An image forming apparatus may include: a plurality of image bearing members; an exposure unit; a developing unit; a transfer unit including a plurality of transfer rollers and a plurality of erasers each disposed between the transfer rollers; and a fixing unit. The eraser may be disposed in a zone Zsatisfying the following formula:1&#x2266;1&#x2266;3;1=4.5 mm;3=4.5 mm; and 9.0 mm&#x3c; Here, Dmay be an allowable minimum distance between an end part of the eraser and a center of a first transfer nip between a first image bearing member and a first transfer roller; Dmay be an allowable minimum distance between the end part of the eraser and a center of a second transfer nip between a second image bearing member and a second transfer roller; and D may be a distance between the centers of the transfer nips.

Growing community of inventors

Suwon-si, South Korea

Won-chul Jung