INK DROP SENSOR
Original Publication Date: 1982-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
An improved optical drop sensing technique is disclosed for utilization in an ink jet marking system. United States Patent 4,255,754 discloses the use of optical fibers for sensing both the position and/or speed of an ink jet droplet in its trajectory towards a recording medium. Drop speed and position information is needed in order to calibrate the ink jet system. If, for example, the system comprises a number of ink drop nozzles which throw ink droplets to specific portions of a recording medium, the sensors can help "stitch" together ink from adjacent nozzles to insure all regions of the medium are covered. The present disclosure comprises an improvement over the optical sensing technique discussed in the '754 patent.