Tokyo Metropolitan Government

Shoichi Hiratsuka

Hideki Arai

A printing mechanism of a line printer for printing Braille characters is disclosed. The printing mechanism comprises a base member having a plurality of printing pins arranged in a row and adapted to be prevented from moving downward in response to the energization of solenoids corresponding to character patterns to be printed, a semicircular printing plate for pressing a paper against the printing pins and a printing plate driving mechanism. During every printing operation, the printing plate is rocked in a lengthwise direction by a pair of rotating disks provided at the ends of the printing plate and each including an eccentric cam groove different in phase with each other, so that the paper is successively pressed against the printing pins in the direction of their arrangement and the raised dots are produced. In another embodiment of the invention, the printing plate is operated by a pair of piston-crank mechanisms provided at the ends of the printing plate.

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Narashino, Japan

Shoichi Hiratsuka