Back pressure regulator ink-jet pen

Details Back pressure regulator ink-jet pen Back pressure regulator ink-jet pen

1997-11-04

1998-12-01

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 85, B41J 2938, B41J 2175

Patent

active

058445773

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.

REFERENCES:
patent: 5583545 (1996-12-01), Pawlowski, Jr. et al.

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