Method of discriminating between the front and back sides of paper sheets
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United States of America Patent
Stats
-
Dec 10, 1985
Grant Date -
N/A
app pub date -
May 20, 1983
filing date -
May 31, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Described is a method of discriminating between front and back sides of the paper sheet bearing different printed design on the front and back sides, the printed design being in dissymmetry both in the up and down direction and in the left and right direction. The amount of light transmitted through plural portions of the paper sheet is sensed for deriving pattern signals indicative of changes in the amount of transmitted light, said pattern signals being then compared to reference pattern signals stored in advance to permit discrimination between the upper and lower edges and between the front and back sides of the sheet.
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