Patent ID: 6817707
Filing Date: 2004-11-16
Classification: B41J

Abstract:
An ink jet printhead assembly for a pressure controlled ink jet printhead comprising:an ink reservoir having an open top cavity defined by sidewalls, a bottom wall and a peripheral edge, the ink reservoir being made of a first material having a first melting point; a pressure control structure having a first surface, a second surface opposite the first surface, a side surface, and an aperture extending therethrough from the first surface to the second surface, the pressure control structure being made of a polymeric material having a second melting point lower than the first melting point; a sealing structure for forming a liquid tight seal between the sidewalls of the ink reservoir and the side surface of the pressure control structure; a pressure regulating film attached to the first surface of the pressure control structure closing the aperture therein; and a cover attached to the ink reservoir to protect the pressure regulating film from damage.