Patent ID: 7976143
Filing Date: 2011-07-12
Classification: B41J

Abstract:
1. An ink pressure regulator for regulating a hydrostatic pressure of ink supplied to an inkjet printhead, said regulator comprising: an ink chamber having an ink outlet for fluid communication with the printhead via an ink line, wherein a roof of the ink chamber comprises: wherein said regulator channel is dimensioned to control a Laplace pressure of air bubbles drawn from said bubble outlet as result of supplying ink to the printhead, thereby regulating a hydrostatic pressure of the ink, and wherein said wetting system comprises: a first wetting chamber connected to said first end; a second wetting chamber connected to said second end; and a liquid-retaining structure positioned in at least one of said wetting chambers, such that said regulator channel, said first wetting chamber, said second wetting chamber and said liquid-retaining structure are all in fluid communication with each other.