Image recording apparatus having a particle control electrode

Details Image recording apparatus having a particle control electrode Image recording apparatus having a particle control electrode

1992-07-27

1993-08-03

Grimley, A. T.

Photocopying

Contact printing

Light boxes

346159, 355245, G03G 1506

Patent

active

052333922

ABSTRACT:
The image recording apparatus of the invention generates an electric field between a particle control electrode, which has apertures, and an electrode roller to directly control the flow of toner particles to record an image on an image recording medium which passes between the electrode and the roller. While the image is recorded, a piezoelectric member mounted on the particle control electrode causes the particle control electrode to vibrate using variable oscillation frequency which will coincide, at least at one time, with the resonance frequency of the particle control electrode. The oscillation frequency is applied from a variable frequency oscillator to the piezoelectric member so that the control electrode is vibrated at a large amplitude. As a result, the toner particles do not adhere to the apertures and the apertures do not become clogged with the toner particles. A high-quality output image will thus be obtained.

REFERENCES:
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patent: 4423950 (1984-01-01), Sagami
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patent: 5027157 (1991-06-01), Hotomi et al.
patent: 5153611 (1992-10-01), Kokado et al.
IBM Technical Disclosure Bulletin "Anticlogging Ink Jet Nozzle Chamber" by R. J. von Gutfeld, vol. 17, No. 6, pp. 1802-Nov. 1974.

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