Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1996-10-25
1999-11-23
Barlow, John
Incremental printing of symbolic information
Ink jet
Ejector mechanism
B41J 206
Patent
active
059887958
ABSTRACT:
An electrostatic ink jet according to the present invention includes a head body having an ink chamber for holding ink liquid containing charged particulate material; an ejection port provided at one end of that head body and connecting to the ink chamber; an ejection electrode arranged near this ejection port and fed with an ejection voltage of the same polarity as the charge characteristic of the charged particulate material; a counter electrode arranged opposite to the ejection port via a recording medium; and a pair of stirring electrodes. The stirring electrodes are arranged in the direction reverse to that of gravity in the ink chamber. The stirring electrodes are fed with a stirring voltage for shifting the charge particulate material in the direction reverse to the direction of gravity, and that stirring voltage is generated before the generation of the ejection voltage. As a result, the toner particulates are prevented from precipitating before the ejection of ink, and their concentration in the ink liquid in the ink chamber is generally uniformized.
REFERENCES:
patent: 4478510 (1984-10-01), Fujii et al.
patent: 4717926 (1988-01-01), Hotomi
patent: 4943818 (1990-07-01), Hotomi
Patent Abstracts of Japan, vol. 14, No. 416, Sep. 1990 & JP 02 160557, Jun. 20, 1990.
Patent Abstracts of Japan, vol. 6, No. 241, (P158) Nov. 30, 1982, JP-A-57-139759 (Konishiroku Shashin Kogyo KK).
Patent Abstracts of Japan, vol. 6, No. 241, (P158), Nov. 30, 1982, JP-A-57-139760 (Konishiroku Shashin Kogyo KK).
Hagiwara Yoshihiro
Minemoto Hitoshi
Shima Kazuo
Suetsugu Junichi
Uematsu Ryosuke
Barlow John
Dickens C.
NEC Corporation
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