Abstract: An ink jet recording apparatus comprises an ink jet recording head having a plurality of discharge portions for discharging ink droplets therethrough, a recording medium conveyor for conveying a recording medium to which the ink droplets adhere and for positioning a recording area of the recording medium, and a blower means for forming a flow of gas in the recording gap between the recording head and the recording area, the velocity of the flow of gas formed by the blower means being lower than the velocity of the ink droplet formed by the recording head.

Abstract: An improved frequency generator is disclosed. The frequency generator includes such a permanent magnet that is magnetized in the direction of the axis of a rotary shaft with which the rotor of the generator is rotated. Between the second magnetic pole side of the permanent magnet and the rotor, there is disposed a flanged cylindrical frame member comprising a flange part and a cylinder part. At the side of the second magnetic pole, the permanent magnet is connected with the flange part of the frame member. The cylinder part of the frame member is arranged so as to surround the circumferential surface of the rotor. The flanged cylindrical frame member disposed in this manner is magnetically conductive so that the area through which the magnetic flux flows between the second magnetic pole side of the permanent magnet and the rotor is effectively increased as compared with the conventional one.