High speed ink jet printer with improved electrical connection t

Details High speed ink jet printer with improved electrical connection t High speed ink jet printer with improved electrical connection t

1986-03-10

1987-07-07

Goldberg, E. A.

Recorders

Markers and/or driving means therefor

With ink supply to marker

346 75, G01D 1516

Patent

active

046790594

ABSTRACT:
An ink jet printer is provided with an ink reservoir including a laminar substrate covered on the outer surface of a plurality of metal coatings forming individual electrodes associated with a plurality of nozzles. These latter are formed of holes passing through the substrate and the coatings. An additional metal coating is provided in the inner surface of the substrate and includes a portion to provide a common electrode and a plurality of portions connected with the coatings of the outer surface. The reservoir has a chamber for the evacuation of gases which form during the printing operation, the chamber having an associated Venturi pump acting as a vacuum source.
The electrical energization circuit for the printer includes an adjustment member for effecting controlled variation in the energy of the pulses which cause the ejection of ink sprays through the printer nozzles.

REFERENCES:
patent: 4432003 (1984-02-01), Barbero
patent: 4536776 (1985-08-01), Knirsch

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