Method and apparatus for degassing ink utilizing microwaves

Details Method and apparatus for degassing ink utilizing microwaves Method and apparatus for degassing ink utilizing microwaves

1999-01-19

2000-07-18

Le, N.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 219

Patent

active

060897023

ABSTRACT:
An apparatus and method for degassing liquid ink utilizes microwaves. An ink degassing unit includes a microwave heater that heats the liquid ink in an ink line passing through the microwave heater. The liquid ink is heated to supersaturate the ink with air and a vacuum chamber of the ink degassing unit is disposed along the ink line and evacuates the ink to pull the air out of the ink. A control system selectively couples the ink degassing unit onto one or more of a plurality of ink supply lines so that only supply lines of ink currently being used for printing are degassed. The control system selectively diverts at least one ink supply line connected to a printhead through the ink degassing unit.

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patent: 5631685 (1997-05-01), Gooray et al.
patent: 5691753 (1997-11-01), Hilton

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