Fingerprint transducer and reading apparatus
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United States of America Patent
Stats
-
Jun 29, 1982
Grant Date -
N/A
app pub date -
May 22, 1980
filing date -
May 22, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The fingerprint transducer contains a sensing member having a sensing surface for receiving a fingerprint, a device for generating an electrostatic charge on the sensing surface and a heating device for heating the sensing surface up to a temperature which is approximately the softening temperature of the sensing member. The method for enhancing fingerprints comprises the steps of generating the fingerprint on the sensing surface, electrostatically charging the sensing surface, heating the sensing surface up to the softening temperature, and thereafter cooling down the sensing member.
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