Patent ID: 8696080
Filing Date: 2014-04-15
Classification: B41J

Abstract:
1. An ink delivery system for a printer, the system comprising: an ink supply that contains ink to be delivered to a printhead of the printer; an ink buffer in fluid communication with the ink supply and the printhead, the ink buffer being positioned physically below the ink supply such that ink can flow to the ink buffer under gravity alone, the ink buffer being to be repeatedly filled with ink from the ink supply and to deliver that ink to the printhead; a refill line that extends down from the ink supply through which ink can flow to the ink buffer; a refill control valve provided along the refill line, wherein the refill control valve can be selectively actuated to control the flow of ink through the refill line; and an ink pressure sensor provided along the refill line to measure the pressure of ink within the refill line between the ink supply and the ink buffer.