Currency note width detector
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United States of America Patent
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-
May 3, 1994
Issued Date -
N/A
app pub date -
May 20, 1993
filing date -
Mar 27, 1991
priority date (Note) -
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status (Latency Note)
Importance
Abstract
Apparatus for accurately determining the width of a traveling document in which respective groups of LEDs are disposed along a line extending transversely of the path of document travel inwardly from points spaced by a distance greater than the maximum document width. The groups of LEDs and respective strip photodiodes associated therewith are disposed on opposite sides of the path so that a document travelling along the path partially blocks respective LEDs of said groups. The LEDs are sequentially energized one by one from one end of the group to the other. The completely unblocked energized LEDs are counted and the percent blocked of the partially blocked LED is determined to permit an accurate width measurement to be calculated.
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Cited Art Landscape
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