	US 7,542,058 B2
	Color image forming apparatus using registration marks
Eiji Nishikawa, Hachioji (Japan); Hiroyuki Maruyama, Kanagawa (Japan); Hiroyuki Arai, Hachioji (Japan); Toshihiro Motoi, Tokyo (Japan); Kenji Izumiya, Hachioji (Japan); Ryuji Okutomi, Hino (Japan); Shinobu Kishi, Hachioji (Japan); Satoshi Ogata, Hachioji (Japan); Kenichi Ozawa, Hachioji (Japan); Tadayuki Ueda, Kokubunji (Japan); and Yumiko Higashi, Kokubunji (Japan)
Assigned to Konica Corporation, Tokyo (Japan)
Filed on May 10, 2005, as Appl. No. 11/126,129.
Application 11/126129 is a division of application No. 10/435743, filed on May 08, 2003, granted, now 6,911,993.
Claims priority of application No. 2002-140431 (JP), filed on May 15, 2002; and application No. 2002-166142 (JP), filed on Jun. 06, 2002.
Prior Publication US 2005/0206934 A1, Sep. 22, 2005
Int. Cl. G03G 15/01 (2006.01)

U.S. Cl. 347—116 [399/301]

19 Claims

1. An image forming apparatus for forming a color image on the basis of arbitrary image information for the color image, the apparatus comprising:

(a) an image forming device having an image forming member for forming the color image through a superposition of component color images on the basis of the arbitrary image information;

(b) a detector for detecting a position of a color image formed by the image forming device; and

wherein the controller controls the image forming device to form at least mark images or reversed mark images which are reversed from the mark images for a registration of component color images according to a condition of use of the image forming device, and controls the image forming device to adjust forming positions of component color images on the basis of a position detection of the mark images or those defined by void portions which are not filled with color toner particles, of the reversed mark images formed by the image forming device.