Ink jet print head maintenance method

Details Ink jet print head maintenance method Ink jet print head maintenance method

1998-11-06

2000-12-26

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 2165

Patent

active

061647527

ABSTRACT:
A method for purging an ink jet print head to clear ink jet orifices is provided. A purge cap forms a vacuum seal over the orifice plate of the print head. Multiple low pressure differential vacuum pulses are applied to the purge cap to remove debris and trapped air bubbles from the ink jet orifices. The low pressure pulses avoid cavitation inside the print head and reduce the amount of ink expelled during the purging process.

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