Recorders – Record receiver deforming
Patent
1979-03-19
1981-03-10
Hartary, Joseph W.
Recorders
Record receiver deforming
250227, 350 9624, G01D 1800
Patent
active
042557542
ABSTRACT:
Optical fibers are used to sense fluid ink drops along the x, y and z axis of an orthogonal coordinate system. A drop sensing zone is defined in the narrow space between the faces of a single input fiber and two output fibers. An LED infrared light source is coupled to a remote end of the input fiber. Infrared sensitive photodiodes are coupled to the remote ends of each output fiber. The photodiodes are in turn coupled to a differential amplifier whose output represents a displacement error for the x and y axis and represents a time reference for the z axis for the case where the drop flight path is along the z axis. A plurality of sensors are disclosed in an ink recording system having a plurality of nozzles and in an ink recording system having an ink generator traversing the length of a high speed rotating drum.
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Fan G. J.; Phase Detection on Ink Jet Drops; IBM Tech. Disc. Bulletin, vol. 16, No. 3, Aug. 1973, p. 880.
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Crean Peter A.
Spencer Paul R.
Hartary Joseph W.
Shanahan Michael H.
Xerox Corporation
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