Two-dimensional ink drop shadow position detecting apparatus

Details Two-dimensional ink drop shadow position detecting apparatus Two-dimensional ink drop shadow position detecting apparatus

1986-07-09

1988-06-28

Goldberg, E. A.

Recorders

Record receiver deforming

346140R, 250227, G01D 1518, G02E 514

Patent

active

047542896

ABSTRACT:
A two-dimensional position detecting apparatus for ink drops is disclosed including a light source and a pair of photodetectors disposed in a detecting region so that the pair of photodetectors respectively produce electrical signals in accordance with a flying position of the ink drops in the detecting region, and a signal processor for detecting a horizontal position of the ink drops on the basis of a difference in an output signal between the photodetectors and for detecting a vertical position of the same ink drops on the basis of the sum of the respective output signals of the pair of photodetectors.

REFERENCES:
patent: 4344078 (1982-08-01), Houston
patent: 4392142 (1983-07-01), Seachman et al.
patent: 4550322 (1985-10-01), Tamai

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