Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1984-06-06
1986-06-17
Miller, Jr., George H.
Recorders
Markers and/or driving means therefor
With ink supply to marker
G01D 1518
Patent
active
045959374
ABSTRACT:
The head is provided for a conductive ink in contact with an electrode (34) and comprises a container (14) having a capillary nozzle (18, 53) and a counterelectrode (54) set into the nozzle that predetermined thickness of ink is in the front part (53) of the nozzle between the meniscus (52) and the inner part of the nozzle wherein a vaporizing current flows between the electrode and the counterelectrode, thereby to expel the said thickness of ink. For that purpose, the container is closed by an insulating plate (30, 31) on which the counterelectrode (54) is disposed, the counterelectrode in turn being covered by a dielectric layer (56). The nozzle is formed by means of a single hole through the plate, the counterelectrode may be of the same thickness as the said thickness of ink, so that the front part of the nozzle is all through the counterelectrode. The dielectric layer may be a first layer covered by a second layer with a hole in the first layer which is larger in diameter than the nozzle, thereby to create a reserve of ink for the frequent dots. For a multi-nozzle head, the nozzles are produced by grooving a portion of the container and then closing over the grooves by an insulating plate bearing the electrodes and the counterelectrodes which are spaced along the axes of the nozzles.
REFERENCES:
patent: 4275290 (1981-06-01), Cielo et al.
patent: 4450457 (1984-05-01), Miyachi et al.
patent: 4458256 (1984-07-01), Shirato et al.
Conta Renatol
Manini Enrico
Ing. C. Olivetti & C. S.p.A.
Miller Jr. George H.
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