Card reader with air passage cleaning structure
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United States of America Patent
Stats
-
Apr 3, 1984
Grant Date -
N/A
app pub date -
Jan 6, 1982
filing date -
Jan 6, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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 components in the apparatus generate heat and through convection 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.
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