Patent ID: 8290382
Filing Date: 2012-10-16
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image carrier; a toner image formation mechanism for forming a toner image on the image carrier; a transfer member, provided at a position at which the transfer member can be pressed against the image carrier, for transferring the toner image, formed on the image carrier, onto a transferred material; a detection device for detecting a toner attachment amount of the toner image formed on the image carrier; and a control section, wherein the control section comprises: an avoidance judging section for judging whether or not avoidance of a pressed region should be performed when a toner image for image formation is formed on the image carrier, the pressed region serving as a region located on the image carrier and being pressed against the transfer member from the end of a previous image forming operation to the start of a present image forming operation; and a first avoidance continuation judging section for judging the necessity for continuation of the avoidance by being operated when it is judged by the avoidance judging section that the “avoidance should be performed”, and wherein the first avoidance continuation judging section comprises: a recognition part for recognizing the position of the pressed region; a first formation part for forming a detection toner image on the pressed region and an adjacent region of the pressed region by the toner image formation mechanism; a first detection part for detecting, by the detection device, a toner attachment amount of the detection toner image formed on the pressed region and a toner attachment amount of the detection toner image formed on the adjacent region of the pressed region; and a first decision part for calculating a difference between both of the toner attachment amounts, thus deciding the necessity for continuation of the avoidance based on whether or not this difference falls within a given range.