Patent ID: 9709945
Date: 2017-07-18
CPC Classifications: G03G

Claim:
1. An image forming apparatus comprising: an image forming unit comprising a transfer roller that forms an image by transferring toner onto a paper sheet; a fixing unit comprising a fixing roller that fixes the image onto the paper sheet; a temperature sensor that senses a temperature of the toner fixed on the paper sheet; a charging unit comprising a charging roller that electrically charges the paper sheet; an adhesion preventing unit comprising at least one of a cooling fan or a wax removing roller that prevents adhesion of wax to the charging unit, wherein the wax is contained in the toner transferred onto the paper sheet, and the adhesion preventing unit is located on an upstream side of the charging unit in a direction of conveyance of the paper sheet; and a controller that controls a temperature of heat to be applied to the paper sheet by the fixing unit by causing the toner temperature sensed by the temperature sensor to be equal to or lower than a crystallization temperature of the wax.