Drop sensor for an ink jet printer

Details Drop sensor for an ink jet printer Drop sensor for an ink jet printer

1984-04-18

1985-10-29

Goldberg, E. A.

Recorders

Record receiver deforming

250227, G01D 1518, G02B 514

Patent

active

045503222

ABSTRACT:
A drop sensor for an ink jet printer for determining the two-dimensional position of an ink drop as it flies through the sensor. A plurality of light emitting elements emit light beams which cross in pairs in the space defined by the sensor. A plurality of light receiving elements are aligned to receive the light beams projected from specific light emitting elements and to generate signals having magnitudes proportional to the intensities of the light received by the light receiving elements. A plurality of differential amplifier circuits compare the outputs of adjacent light receiving elements to determine whether an ink drop is coincident with selected matrix points within the sensor.

REFERENCES:
patent: 4255754 (1981-03-01), Crean et al.
patent: 4344078 (1982-08-01), Houston

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