Pressure regulated free-ink ink-jet pen

Details Pressure regulated free-ink ink-jet pen Pressure regulated free-ink ink-jet pen

1995-08-24

1998-04-07

Metjahic, Safet

Incremental printing of symbolic information

Ink jet

Controller

347 85, B41J 2195

Patent

active

057369925

ABSTRACT:
The present invention relates to free-ink type ink-jet pens. A spring-loaded regulator mechanism is provided within the pen to allow ink from a pressurized ink reservoir to be fed to the pen while maintaining a predetermined set point back-pressure at the printhead as needed for appropriate pen operation. A mechanism in communication with the ambient atmosphere is used in conjunction with a substantially constant force biasing mechanism to maintain the balance between the countervailing forces. Back-pressure is maintained substantially constant regardless of the ink flow rate from the ink reservoir into the pen.

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