Ink jet recording apparatus of the continuous jet type

Details Ink jet recording apparatus of the continuous jet type Ink jet recording apparatus of the continuous jet type

1993-01-28

1995-01-10

Miller, Jr., George H.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 16, B41J 202

Patent

active

053811704

ABSTRACT:
A continuous ink jet recording apparatus which can record an image always with an appropriate density on any of various record media. A vibrating element driver drives a piezoelectric vibrating element in response to a disintegrating frequency signal from an oscillator to disintegrate a jet of ink from a nozzle. A multiplier multiplies picture element data of a line buffer by a density coefficient, and a pulse width modulator converts the picture element data from the multiplier into a charging controlling signal of the pulse width which increases in proportion to the number of ink drops per picture element. The charging controlling signal is applied via a high voltage switch to a controlling electrode, by which the in drops are charged in accordance with the charging controlling signal. A deflecting electrode deflects the charged ink drops. A frequency divider and a frequency converter frequency divides the disintegrating frequency signal by a gradation number and the density coefficient to obtain a picture element recording frequency signal, and a drum motor controlling circuit drives a drum motor to rotate a rotary drum at a speed in accordance with the picture element recording frequency signal.

REFERENCES:
patent: 3928718 (1975-12-01), Sagae et al.
patent: 4281333 (1981-07-01), Tsuzuki et al.
patent: 4620196 (1986-10-01), Hertz et al.
patent: 4673951 (1987-06-01), Mutoh et al.
patent: 4725852 (1988-02-01), Gamblin et al.
patent: 4851860 (1989-07-01), Mutoh

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