Card reader with air passage cleaning structure

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

1982-01-06

1984-04-03

Pellinen, A. D.

Registers

Coded record sensors

Particular sensor structure

235454, 235474, 235182, G06K 710

Patent

active

044410182

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.

REFERENCES:
patent: 4114028 (1978-09-01), Baio et al.
patent: 4140273 (1979-02-01), Townsend et al.

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