Ink droplet ejecting method and apparatus

Details Ink droplet ejecting method and apparatus Ink droplet ejecting method and apparatus

1998-11-30

2000-08-08

Barlow, John

Incremental printing of symbolic information

Ink jet

Controller

B41J 2938

Patent

active

060991038

ABSTRACT:
In an ink droplet ejecting method and apparatus, a main driving waveform for the ejection of ink droplet is followed by two additional non-jet pulses, for one dot, without changing a driving voltage, whereby not only an ink droplet of a small volume can be obtained, but also the ink droplet speed in the second ejection after a stop which follows continuous droplet ejection is prevented from becoming lower. The application of a jet pulse signal A of one dot is followed by the application of both a droplet downsizing pulse B as a non-jet pulse for reducing the size of an ejected ink droplet, the pulse B being smaller in pulse width than the jet pulse signal A, and a jet stabilizing pulse C as a non-jet pulse for stabilizing the ejection of ink droplet. By so doing, even when the ink viscosity is low at a high temperature, the ejection of ink droplet is stabilized and a decrease in the droplet speed is prevented.

REFERENCES:
patent: 4523200 (1985-06-01), Howkins
patent: 5028936 (1991-07-01), Bartky et al.
patent: 5736994 (1998-04-01), Takahashi
patent: 5736995 (1998-04-01), Bohorquez et al.
patent: 5903286 (1999-05-01), Takahashi

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