Abstract: In an electrophotographic device, a heat roller is heated by a heater, and upon instruction of start of a print operation, the temperature Tf of the heat roller is detected by a temperature sensor. When the temperature Tf is above a predetermined temperature Tv at which high voltage is applied, the high voltage is applied. Thereafter, the temperature Tf of the heat roller is detected again, and if the temperature Tf is above a predetermined temperature Ts at which the sheet is fed, the solenoid clutch is switched on to feed the sheet. If the print operation is not terminated, the temperature of the heat roller is detected again, and it is checked whether the temperature of the heat roller is above a predetermined fixing temperature Tp.

Abstract: A printing device with an improved printing quality is proposed. A printed line never becomes rugged even when the cover of the printing mechanism is operated during the printing. The printing device includes a sheet feed means including a feed motor, a movable cover for covering a printing mechanism, a detector for detecting an opening a last position of the feed motor at a time when the opening of the cover is detected, and a feed control means for setting the feed motor at the last phase position when the closing of the cover is detected.