Silver Seiko Ltd.

Hideo Aoki

Kenji Tamada

Taro Kasagi

Kazuaki Takahashi

Masami Hayakawa

Typewriter

An automatic line spacing device which can be advantageously incorporated in typewriters, especially of the type which has no constantly rotating power shaft. A feed pawl is mounted on a rockable member and cooperates with a ratchet to angularly rotate a typewriter type platen. The rockable member is constantly coupled to a bidirectional electric motor which is first energized sufficiently to angularly rotate the rockable member from its home position to a rotated limit position defined by a fixed positive stop element for effecting a line spacing operation and then secondly energized sufficiently to rotate the rockable member back to its home position as defined by another stop element. A cam adjusts the angle during which the feed pawl engages the ratchet so as to effect different line spacing increments.

Line spacing device for an office machine

A ribbon lift device for selectively positioning a print ribbon and a correction ribbon to a print position for printing or correction of a character includes a first cam having a cam groove formed therein for lifting the print ribbon to the print position and a second cam having a cam profile for lifting the correction ribbon to the print position. Means are provided for coupling the first and second cams such that forward rotation of the first cam will not rotate the second cam but reverse rotation of the first cam will rotate the second cam in the same direction, and a bidirectional electric motor is coupled to the first cam whereby rotation of the motor will lift the print ribbon or the correction ribbon, depending upon the direction of rotation.

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Kodaira, Japan

Hideo Aoki