Side printing apparatus

摘要

A side printing apparatus for providing latent images of characters, numerals, symbols and the like on a photographic film moving in continuous motion includes a film sensitivity responsive means for generating several kinds of pulse having different pulse lengths which are predetermined in accordance with sensitivity of film. The pulse operates to cause a light image forming device to be energized for a time defined corresponding to the pulse length thereof so as to provide a latent image of character, numeral, symbol or the like on a photographic film.