05875380 is referenced by 64 patents and cites 11 patents.

An image processing apparatus eliminates a detection error in a color offset detecting operation due to a periodic fluctuation in a speed of a conveying belt which conveys a transfer sheet on which color component images are transferred and superimpose to form a multi-color image. A plurality of image forming units are arranged along the conveying belt, each of the image forming units transferring a color component image on the transfer sheet and also transferring a register mark on the conveying belt. A register mark detecting sensor located along the conveying belt detects the register mark on the conveying belt. A distance between the register mark detecting sensor and one of the plurality of image forming units adjacent to the register mark detecting sensor is a multiple of an integer of a circumference of the drive roller. A distance between adjacent ones of the plurality of image forming units is a multiple of an integer of the circumference of the drive roller.

Title
Image forming apparatus eliminating influence of fluctuation in speed of a conveying belt to correction of offset in color registration
Application Number
189626
Publication Number
5875380
Application Date
February 5, 1998
Publication Date
February 23, 1999
Inventor
Yutaka Shio
Tottori
JP
Tadashi Shinohara
Kanagawa
JP
Toshiya Sato
Kanagawa
JP
Nobuo Iwata
Kanagawa
JP
Agent
Oblon Spivak McClelland Maier & Neustadt P C
Assignee
Ricoh Company
JP
IPC
G03G 15/01
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