Card reader with air passage cleaning structure

Details Card reader with air passage cleaning structure Card reader with air passage cleaning structure

G - Physics

06

K

352/53.7

G06K 13/04 (2006.01) G06K 7/10 (2006.01)

Patent

CA 1167160

ABSTRACT OF THE DISCLOSURE An optical punched card reading apparatus is disclosed wherein a plurality of air passageways are disposed throughout the apparatus. The various electrical and photo-electric com- ponents in the apparatus generate heat and through connection heat the air. The temperature differentials cause pressure differentials which in turn cause air flow in the apparatus. The air passageways channelize the air flow, removing dust and dirt particles that otherwise would accumulate in the photo- electric components of the apparatus. -21-

402766

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