Printhead for ink jet printing apparatus

Abstract From the Canadian patent

A printhead for an ink jet printing apparatus comprising a body having a recess in its back face and a, plurality of bosses extending from the bottom of the recess with an orifice extending through each boss; a flexible membrane over the recess forming a chamber for ink supplied from a source under pressure the membrane, engageable with the back ends of the bosses for closing the orifices; a plurality of relatively slender elongate members one for each boss extending rearward from the back of the membrane, each of the elongate members being generally aligned at its inner end with its respective boss; means at the outer end of each elongate member operable by the elongate member for …