Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1986-07-25
1988-06-21
Hartary, Joseph W.
Recorders
Markers and/or driving means therefor
With ink supply to marker
310368, 310328, G01D 1518
Patent
active
047527897
ABSTRACT:
A multi-layer transducer array for an ink jet apparatus having a plurality of variable-volume chambers includes a plurality of thin plates of piezoceramic material stacked one upon the other. Each of the plates are adapted to be coupled to a respective one of the chambers, and are formed with an active piezoelectric region which is separated from a structured region by a cut through the material leaving only one end of the active region connected to the structural region. One side of the active region is coated with a conductive material, thereby providing electrical connection to a thin foil strip arranged at the end of the plate remote from the chambers. Successive layers of such plates are stacked one on top of the other, with adjacent active regions staggered relative to each other, and with the thin foil strip between adjacent pairs of plates providing both mechanical isolation and a connection for electrical signals to pulse selected transducers.
REFERENCES:
patent: 3267485 (1966-08-01), Howell
patent: 4216402 (1980-08-01), Engdahl
patent: 4456394 (1984-06-01), Kolm
patent: 4459601 (1984-07-01), Howkins
patent: 4578686 (1986-03-01), Vollert
Dataproducts Corporation
Hartary Joseph W.
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