06381435 is referenced by 69 patents and cites 7 patents.

An image forming apparatus includes a plurality of image formation units which print an image of different color on a paper and also form positional deviation detection marks and image density regulation marks, on a conveyer belt or on at least one of a recording medium and an intermediate transfer body that conveys the paper, when such a request is received. When requests for formation of the positional deviation detection marks and the request for the formation of the image density regulation marks is received at the same time or at substantially the same time, the main CPU orchestrates the conveyer belt and the image forming units to form the positional deviation detection marks and the image density regulation marks in continuation.

Title
Color image forming apparatus
Application Number
9/734555
Publication Number
6381435 (B2)
Application Date
December 13, 2000
Publication Date
April 30, 2002
Inventor
Hideo Nakagawa
Tokyo
US
Motonori Hanada
Tokyo
US
Nobuo Iwata
Tokyo
US
Mitsugu Sugiyama
Tokyo
US
Toshiya Sato
Tokyo
US
Yasushi Nakazato
Tokyo
US
Tadashi Shinohara
Tokyo
US
Agent
Oblon Spivak McClelland Maier & Neustadt P C
US
Assignee
Ricoh Company
US
IPC
G03G 15/01
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