Regulator for a free-ink inkjet pen
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United States of America Patent
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-
Nov 2, 1999
Issued Date -
N/A
app pub date -
Jun 12, 1997
filing date -
Oct 31, 1994
priority date (Note) -
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status (Latency Note)
Importance
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.
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