PRINTHEAD FOR INK JET PRINTING APPARATUS AND SOLENOID THEREFOR

摘要

A printhead (1) for ink jet printing apparatus having a plurality of orifices (43) for delivery of droplets of ink with delivery controlled by miniature solenoids (83), one for each orifice (43), each solenoid (83) having a plunger (87) directly engageable with a membrane (15) to block flow of ink to a respective orifice and electromagnetically retractable from the membrane (15) for flow of ink for delivery of a droplet of ink from the respective orifice, with provision for proportional valve action for each orifice.