Printhead structure having electrodes not extending to the edge

Details Printhead structure having electrodes not extending to the edge Printhead structure having electrodes not extending to the edge

1997-06-03

2000-05-09

Barlow, John

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 204

Patent

active

060593989

ABSTRACT:
A printhead structure is provided comprising individual control electrodes (106a) in combination with printing apertures (107) and a shield electrode (106b), both electrodes separated by an insulating material wherein both the shield electrode and the control electrodes have openings and either the shield electrode or each of the control electrodes does not reach as far as the edges of the printing apertures. The linear dimension of the openings in the shield electrode or in each of the control electrodes is at least 1.1 times larger than the longest linear dimension of each of the printing apertures present in the openings. A DEP device using such a printhead structure is also disclosed.

REFERENCES:
patent: 5214451 (1993-05-01), Schmidlin et al.
patent: 5606402 (1997-02-01), Fujita et al.
patent: 5781217 (1998-07-01), Desie
Patent Abstracts of Japan, vol. 010, No. 295 (M-523), Oct. 7, 1986 and JP-A-61 110567 (Nippon Telegr & Teleph Corp.) May 28, 1986.

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