Finger-moistening means for fingerprint recognizing apparatus
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United States of America Patent
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-
Mar 9, 1999
Grant Date -
N/A
app pub date -
Jul 15, 1998
filing date -
Jul 15, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A finger-moistening device for fingerprint recognizing apparatus includes: a container filled with a non-volatile oil or liquid in the container, a powder-metallurgy made roller rotatably mounted and capillarily impregnated in the container to form an oil-impregnated roller, and an upper cover covering the container and having an opening for protruding a peripheral portion of the roller outwardly from the cover and the container for spreading a thin layer of oil or liquid onto the finger of a person to be detected to increase the cohesion between the finger and a prism surface of the fingerprint recognizing apparatus for obtaining a clear fingerprint image for a qualified fingerprint recognition.
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