Hewlett-packard Development Company, L.p.

Ricardo G Diaz

Mark A Devries

Greg K Justice

Chris Arnold

Andrew B Levy

An ink delivery system includes a plurality of ink supplies, an air pressure source to generate ink pressure for each ink supply, an ink valve associated with each ink supply, where each ink valve is configured to prevent a reverse flow of ink from a pen to the associated ink supply, and each ink valve has a switch configured to provide an open signal when the ink valve is open, and a controller configured to determine one of a normal ink condition, an out of ink condition or a system pressure problem based on receiving the open signals and to regulate the pressure source according to the determination.

Growing community of inventors

Vancouver, WA, United States of America

Ricardo G Diaz