Patent ID: 8406677
Filing Date: 2013-03-26
Classification: G03G

Abstract:
1. An image forming device, comprising: a first photoreceptor for forming monochrome picture-image that corresponds to black toner; a second photoreceptor for forming color picture-image that corresponds to color toner; cleaner blades that are respectively in contact with said first and second photoreceptors; developing devices corresponding to respective colors of the toner; a drive mechanism for causing said first and second photoreceptors to rotate; a picture-image forming unit for forming an image by transferring a toner image developed on said first and second photoreceptors to an image carrier; a supplying unit for supplying the toner to said first and second photoreceptors; and a controller, wherein said drive mechanism causes said second photoreceptor to rotate when forming a monochrome picture-image using said picture-image forming unit, and said controller causes said supplying unit to supply a predetermined amount of toner as lubricant to said second photoreceptor at a timing determined based on an amount of toner remaining on said second photoreceptor after the transfer to said image carrier, wherein a first counter is provided for integrating a first toner amount obtained from the amount of operation of said picture-image forming unit for forming a monochrome image; and a second counter is provided for integrating a second toner amount obtained from the amount of operation of said picture-image forming unit for forming a color image, the second toner amount being the amount of toner remaining on said second photoreceptor, wherein at said timing at which a value obtained by subtracting a value of said second counter from a value of said first counter reaches a threshold value, said controller causes said supplying unit to supply the toner of an amount corresponding to said threshold value as lubricant to said second photoreceptor.