Electrostatic print head

Details Electrostatic print head Electrostatic print head

1986-10-28

1987-08-25

Evans, Arthur G.

Recorders

Electric recording

Electrochemical

346139C, G01D 1506

Patent

active

046896430

ABSTRACT:
The invention relates to electrostatic print heads enabling an electrostatic latent image to be progressively built up on a moving medium (18) which may be constituted by special paper or by some other material, by discharging ions using a set of aligned electrodes (20) and a counterelectrode (1) disposed opposite said electrodes on the other side of the moving medium (18). The counterelectrode (1) is constituted by a cylindrical or semi-cylindrical resistive layer (7) covering connection conductors (C.sub.1 to C.sub.n+1) which are constituted by parallel rings or ring sectors sharing a common axis with the resistive layer and having cylindrical or semi-cylindrical resistive portions extending therebetween. The rings or ring sectors are individually connected to outlets from an electronic selective switching circuit (CEC) which is at least partially housed within the concave portion of said counterelectrode (1).

REFERENCES:
patent: 3348232 (1967-10-01), King
patent: 4443292 (1984-04-01), Lakhani et al.
patent: 4534814 (1985-08-01), Volpe et al.
"Fabrication Process for Print Electrode Arrays", by Acciai et al., IBM Tec. Dis. Bulletin, vol. 27, No. 6, Nov. 1984, pp. 3421-3422.

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