Method and apparatus for refilling ink jet cartridges

Details Method and apparatus for refilling ink jet cartridges Method and apparatus for refilling ink jet cartridges

1995-09-05

1997-09-02

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 2175

Patent

active

056637543

ABSTRACT:
A method and apparatus is provided for refilling an ink reservoir associated with an ink jet printhead. A refill ink source is brought into sealing engagement with the front nozzle face of the printhead. Ink from the refill reservoir is forced into the printhead nozzles and flows through the nozzle channels back into the reservoir. The refill operation can be enabled by establishing a pressure gradient against the refill ink supply forcing it through a pressure regulating drive seal, or a filter, into the nozzles. Alternatively, a vacuum is established through a vent tube to the cartridge reservoir creating a negative differential at the vent hole and causing the ink from the refill container to pass through the nozzles into the supply reservoir.

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