Regulator for a free-ink inkjet pen

Details Regulator for a free-ink inkjet pen Regulator for a free-ink inkjet pen

1997-06-12

1999-11-02

Le, N.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 2175

Patent

active

059756861

ABSTRACT:
A free-ink inkjet pen is adapted to be fluidically coupled to a positive pressure, off-axis ink reservoir. The pen includes a pressure regulator mechanism in an ink accumulation chamber fluidically coupled to a print head mechanism maintained at a predetermined back pressure by the pressure regulator. A flexible bag is maintained at atmospheric pressure within the accumulator and acts as an actuator against a pressure regulator bias. In the preferred embodiment, the pressure regulator mechanism includes an actuation lever and a pressure regulation lever biased toward each other. The flexible bag is mounted between the levers where by expanding and contracting both levers are actuated appropriately. A variety of bag fabrication configurations, bag materials, and valve seat materials are disclosed.

REFERENCES:
patent: 4475116 (1984-10-01), Sickling et al.
patent: 4509062 (1985-04-01), Low et al.
patent: 4739347 (1988-04-01), Ishikawa et al.
patent: 5040001 (1991-08-01), Dunn et al.
patent: 5409134 (1995-04-01), Cowger et al.
patent: 5453772 (1995-09-01), Aono et al.
patent: 5719609 (1998-02-01), Hauck et al.
patent: 5872584 (1999-02-01), Hauck et al.

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