PAPER VELOCITY MEASURING INSTRUMENT
Original Publication Date: 1984-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
Proposed is a low cost and easy to use method of measuring paper velocity in a copier where difficulties are encountered in accurately measuring sheet velocity. The illustrated device utilizes a nano scanner 1 to pick up ladder chart lines drawn on a moving sheet of paper. The frequency at which the lines pass the scanner is directly proportional to the velocity of the paper. The signal from the scanner is filtered, amplified, and directed to a frequency-to-voltage converter 2 having its output connected to a visicorder 3 for visual monitoring. Velocities UD to 24 inches/second have been measured using a ladder chart with .08 inch spacing.