Patent ID: 8403460

Claim:
A printhead comprising: a laminate subassembly including an actuator, a cavity plate having a pumping chamber, and an orifice plate having an orifice through which fluid is ejected, the actuator being bonded to the cavity plate such that the pumping chamber is covered by the actuator, and the cavity plate being bonded to the orifice plate such that the pumping chamber and the orifice form a flow path; a body attached to the laminate subassembly such that the actuator is between the body and the cavity plate, the body including a fluid manifold that is part of the flow path; an enclosed space between the body and the actuator forming a chamber that seals the actuator from the flow path; an opening formed in a surface of the body and connected to the chamber; and a seal attached to the opening and configured to detach from the opening to release pressure and to reattach.