To provide an image forming device in which the time from forming a toner image density patch until detecting toner image density is shortened.
This image forming device equipped with image carriers 1 and a paper carrying belt 5 to which a toner image is transferred is equipped with a density measurement toner image forming means to form toner images for density measurement with toner of respective colors on the image carries 1, a density measurement toner image transfer means to transfer the toner image so that the arraying order of the image carriers 1 on which the respective color density measurement toner images are formed may be the same as the arraying order of the density measurement toner images transferred to the belt 5, and an automatic density detecting sensor 11 to measure the density of the density measurement toner image.
SHISHIKURA SHUNICHIRO
YAMAZAKI NAOYA
YOSHIDA TORU
