System for detecting punched holes of magnetic cards
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 30, 1993
Grant Date -
N/A
app pub date -
Dec 18, 1991
filing date -
Apr 19, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention comprises a magnetic card 1 in which punched holes 5 are punched to indicate incidence of use data and a punched hole detection apparatus 4 for detecting the punched holes 5 of the magnetic card 1. The magnetic card 1 has a hole punch section 3 in the shape of a strip. The punched hole section 3 has a plurality of small segments 31 in a row which are arranged parallel to the length of the card, and two kinds of ink having different optical characteristics are applied to the small segments 31 according to prescribed rules. The punched hole detection apparatus 4 comprises a light source for shooting rays of light used to distinguish the two kinds of ink onto the punched hole section 3; a light-receiving section for receiving rays of light reflected by the hole punch section 3 of the magnetic card 1 and for outputting a light reception signal; a pattern storage section 45 for storing predefined signal patterns for normal magnetic cards 1; and a comparison section 44 for comparing the light reception signal from the light-receiving section with normal signal patterns stored by the pattern storage section 45.
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