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Title: Ink supply for pressurized ink jet
Abstract:
Ink supply system and sequencing for purge, startup, operation, and shutoff of pressurized ink jet systems. Employing an ink jet head having an inlet, startup is accomplished by filling the head with ink, closing an inlet valve, building pressure behind the valve to a level significantly greater than required for operation, and opening the valve. The system includes an inlet valve connecting a pump from a reservoir to the ink jet head, and an outlet valve connecting an outlet from the head to the reservoir and a vacuum source. At shutoff, the inlet valve is closed with the outlet valve open to create a negative pressure in the head.
Other info: Inventors: Perry, Francis James (Morgan Hill, CA, US) Vesci, Anthony (San Jose, CA, US) Application Number: 691699 Filing Date: 1976-06-01 Publication_date: 1977-08-16 Assignee: International Business Machines Corporation (Armonk, NY) Primary Class(es): 347/89 347/22 Other Classes: US Patent Ref:
Other Refs:
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