Ink jet ink supply system

Details Ink jet ink supply system Ink jet ink supply system

1976-04-28

1977-07-26

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

G01D 1518

Patent

active

040386678

ABSTRACT:
An ink supply system for an ink jet, or an array of ink jets, is disclosed in which an on-off valve is interposed in the conduit between the ink reservoir and the droplet forming nozzle, and a second source of ink under pressure is connected through a normally closed valve to the conduit between the nozzle and the on-off valve. To initially prime the nozzle, the on-off valve is closed, a vacuum pulled on the nozzle, and the valve opened to fill the conduit and nozzle. To reprime or clear obstructions such as dirt particles, the on-off valve is closed and the normally closed valve briefly opened to send a pulse of ink to and through the nozzle. With both valves closed during shipping or storage, the likelihood or ink being dislodged from the nozzle or conduit so as to deprime the nozzle is minimized.

REFERENCES:
patent: 3661304 (1972-05-01), Martinez
patent: 3974508 (1976-08-01), Blumenthal

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