Abstract: An electric fan comprises a rotary shaft supported on a mounting base plate. The rotary shaft is extended through a cylindrical stator and on a tip of the rotary shaft, the bottom of a cup-shaped rotor yoke as well as an impeller are secured. The stator is enclosed in the rotor yoke, on whose inner wall an anisotropic rotor magnet magnetized in the reverse polarity alternately in its circumferential direction is secured. The stator and the rotor form a DC brushless motor, whereby the impeller is rotated through the rotation of the rotor and the rotary shaft. In the proximity of the rotor magnet, there is provided a hall integrated circuit (IC), through which a rotating position of the rotor may be detected. On the basis of the rotating position signal from the hall IC, a microcomputer controls the current flowing period in such a manner that the current flowing through the stator coil will partly overlap between each phase.

Abstract: An image forming apparatus utilizes a paper which has a part capable of recording a visible image on the surface thereof and a part capable of recording magnetic information thereon. A toner image is formed on the visible image recording part of the paper by a photosensitive drum, a developing apparatus and a transferring device. A magnetic information signal is recorded on the magnetic recording part of the paper by a magnetic record head. A discharging device is provided for discharging the paper on which both a visible image and magnetic information are recorded.