Apparatus and method for reading punched cards

Details Apparatus and method for reading punched cards Apparatus and method for reading punched cards

1982-01-04

1983-07-12

Pitts, Harold I.

Registers

Coded record sensors

Synchronization

235442, G06K 7016

Patent

active

043933025

ABSTRACT:
The present invention relates to an apparatus and a method for reading punched cards and, more particularly, to such apparatus, and method for reading gravity-fed punched cards.
This apparatus comprises a reference perforation sensor located upstream of the hole sensors so as to sense the duration of the passage of a reference perofaration cut out in a card, before any hole position faces the set of hole sensors.

REFERENCES:
patent: 3601584 (1971-08-01), Kashio

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