Piezoelectric printing head for ink jet printer, and method
AssigneeSiemens Aktiengesellschaft
InventorsErich Kattner, Kurt Herzog
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Abstract
A printing head for an ink jet printer has a plurality of ink channels formed as hollow tubes, each with a hollow cylindrical piezoelectric transducer, which tubes are interconnected to form a piezoelectric tube group. The piezoelectric tube group is assembled with a front housing part which supports the front end of the tube group, and a housing cap bearing electrical contacts engaging the piezoelectric tube elements is assembled in place, after which the interior is filled with a casting resin.
Claims14
A printing head for an ink jet printer, including, in combination, a plurality of ink channels, each surrounded by a piezoelectric transducer over a portion of its length, and terminating at a jet plate, said channels being formed by a plurality of hollow tubes disposed in a plane and mechanically interconnected to form a piezoelectric tube group, the wall thickness of said tubes being reduced in the region of the piezoelectric transducers and forming a protective barrier between the interior of the ink channel and the transducer, a front housing part having a conical recess adapted to receive and support said piezoelectric tube group, and a housing cap supporting contact elements adapted to make electrical connection with said piezoelectric transducers when said cap is assembled in place.
A method of constructing a printing head for an ink jet printer, comprising the steps of;
- forming a plurality of hollow tubes and tubular piezoelectric transducers interconnected by means of a crosspiece as a single piezoelectric tube group component, each tube of said tube group having an individual piezoelectric transducer with exposed electrical contacts for said transducer, assembling said piezoelectric tube group with a front housing part having a recess for receiving and supporting said piezoelectric tube group, and assembling said piezoelectric tube group with a housing cap having electrical contacts supported thereon adapted to engage said contacts of said piezoelectric elements when said cap is in assembled position.
Dependencies are inferred from the claim text.