Constant flow rate liquid supply pump

Details Constant flow rate liquid supply pump Constant flow rate liquid supply pump

1979-11-26

1981-04-21

Miller, Jr., George H.

Recorders

Markers and/or driving means therefor

With ink supply to marker

346 75, 222318, 417503, 417521, G01D 1518, G01F 1130, F04B 2300, F04B 4100

Patent

active

042636027

ABSTRACT:
An ink liquid supply system for an ink jet system printer comprises an ink liquid reservoir for containing ink liquid therein, and a constant flow rate pump for supplying the ink liquid to a nozzle. The constant flow rate pump comprises a cylinder block, a piston disposed in the cylinder block, and a diaphragm secured to one end of the piston. A first pressure chamber is defined by the other end of the piston, and a second pressure chamber is defined by the diaphragm. In response to the reciprocating movement of the piston, the first pressure chamber functions to introduce the ink liquid from the ink liquid reservoir and to develop the ink liquid of a constant flow rate to the nozzle. At the same time, the second pressure chamber functions to introduce a waste ink liquid from a beam gutter of the ink jet system printer and to return the waste ink liquid to the ink liquid reservoir.

REFERENCES:
patent: 862867 (1907-08-01), Eggleston
patent: 1605832 (1926-11-01), Garhart
patent: 3139156 (1964-06-01), Urso
patent: 3765802 (1973-10-01), Leitermann et al.
patent: 4053902 (1977-10-01), Skafvenstedt et al.
patent: 4073408 (1978-02-01), Hartwig
patent: 4079384 (1978-03-01), Takano et al.
patent: 4204215 (1980-05-01), Nakarai

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