Patent ID: 7653329
Filing Date: 2010-01-26
Classification: G03G

Abstract:
1. An image forming device comprising: a motor; a photoconductive drum which is driven and rotated by the motor and includes a photoconductive layer provided on the photoconductive drum; a charging unit which is arranged at a periphery of the photoconductive drum and charges the photoconductive drum by a corona discharge method; an abrasion tool which is arranged at the periphery of the photoconductive drum and abrades a surface of the photoconductive drum while the photoconductive drum is rotating; a timer which measures a job interval from a time when the motor is stopped to end a previous print job until when the motor is driven to start a next print job; a controller which executes a pre-rotation process to adjust the photoconductive drum and a peripheral system of the photoconductive drum into an optimum state, and calculates a pre-rotation period when the pre-rotation process is to be executed according to the measured job interval; a paper feed cassette which accommodates at least one printing paper; a pickup roller which picks up the printing paper accommodated in the paper feed cassette one sheet at a time; and a fixing unit which heats and fixes a toner image transferred onto the printing paper from the photoconductive drum; wherein the abrasion tool is a cleaning blade having a tip end arranged in contact with the photoconductive drum; the controller starts to rotate the pickup roller in synchronism with an end of the pre-rotation process, and feeds a first sheet of the printing paper from the paper feed cassette; and the controller selects one of an execution period calculated in accordance with the job interval and an execution period required from a start of the next print job until when the fixing unit reaches a predetermined paper feed starting temperature, whichever is longer, as the pre-rotation period for the next print job.