1
Paul A Hoisington, Edward R Moynihan, David W Gailus: Method of making a thin-film transducer ink jet head. Spectra, Brumbaugh Graves Donohue & Raymond, November 30, 1993: US05265315 (157 worldwide citation)

A thin-film transducer ink jet head is prepared by oxidizing one surface of a silicon wafer to provide a dielectric layer, forming electrodes on the layer by photoresist processing techniques, depositing one or more layers of PZT material to provide a thin-film piezoelectric layer having a thickness ...


2
Kenneth H Fischbeck, Paul A Hoisington: Shear mode transducer for ink jet systems. Spectra, Brumbaugh Graves Donohue & Raymond, April 25, 1989: US04825227 (104 worldwide citation)

In the shear mode piezoelectric transducer for an ink jet system described in the specification, a piezoelectric plate is polarized parallel to the plane of the plate and in directions extending away from the center of the pressure chamber with which the transducer is used, and electrodes mounted on ...


3
Paul A Hoisington, Nathan P Hine, Charles W Spehrley Jr: Hot melt ink supply system. Spectra, Brumbaugh Graves Donohue & Raymond, March 21, 1989: US04814786 (69 worldwide citation)

In the representative hot melt ink supply system described in the specification, a first hot melt ink supply reservoir maintains ink in molten condition during operation of the system and a second reservoir mounted with an ink jet head on a movable carriage communicates with the first reservoir thro ...


4
Nathan P Hine, Paul A Hoisington, Charles W Spehrley Jr, Melvin Biggs, Richard Carden: Ink supply system for an ink jet head. Spectra, Brumbaugh Graves Donohue & Raymond, June 26, 1990: US04937598 (60 worldwide citation)

In the representative ink supply system described in the specification, continuous circulation of ink in an ink jet head is accomplished by providing two reservoirs connected to each ink jet orifice through corresponding passages so that ink flows continuously from a high-level reservoir past the or ...


5
Paul A Hoisington: High resolution matrix ink jet arrangement. Spectra, Baker & Botts L, May 26, 1998: US05757400 (54 worldwide citation)

In the particular embodiments of the invention described in the specification, an ink jet system has a plurality of modular ink jet arrays arranged to produce high resolution images on a substrate. In one embodiment, the ink jet arrays are formed in an ink chamber plate in rows and columns providing ...


6
Edward R Moynihan, David W Gailus, Robert G Palifka, Paul A Hoisington: Simplified ink jet head. Spectra, Brumbaugh Graves Donohue & Raymond, August 19, 1997: US05659346 (44 worldwide citation)

In the embodiments of the simplified ink jet head described in the specification, a carbon plate is formed with orifice passages extending through the plate, pressure chambers on one side of the plate, flow-through passages on the other side of the plate and ink supply passages, and a piezoelectric ...


7
Paul A Hoisington, Nathan P Hine: Ink jet head with ink usage sensor. Spectra, Brumbaugh Graves Donohue & Raymond, December 2, 1997: US05694156 (43 worldwide citation)

In the representative embodiments disclosed in the specification, an ink jet system includes a carriage for driving an ink jet head having a reservoir containing ink in a reciprocating motion and a counter for counting ink drops ejected through orifices in the ink jet head, and a nonvolatile memory ...


8
Andreas Bibl, John A Higginson, Paul A Hoisington, Deane A Gardner, Robert A Hasenbein, Melvin L Biggs, Edward R Moynihan: Printhead having a thin pre-fired piezoelectric layer. Dimatix, Fish & Richardson P C, May 30, 2006: US07052117 (41 worldwide citation)

Ink jet printheads and printhead components are described. One printhead includes a flow path and a piezoelectric actuator. The flow path includes a pumping region and the piezoelectric actuator is associated with the pumping region. The actuator has a pre-fired piezoelectric layer with a thickness ...


9
Nathan P Hine, Paul A Hoisington, Charles W Spehrley Jr, Melvin L Biggs, Richard Carden: Dual reservoir and valve system for an ink jet head. Spectra, Brumbaugh Graves Donohue & Raymond, February 23, 1993: US05189438 (41 worldwide citation)

In the representative ink supply system described in the specification, continuous circulation of ink in an ink jet head is accomplished by providing two reservoirs connected to each ink jet orifice through corresponding passages so that ink flows continuously from a high-level reservoir past the or ...


10
Paul A Hoisington, Nathan P Hine, Charles W Spehrley Jr: Deaeration of ink in an ink jet system. Spectra, Brumbaugh Graves Donohue & Raymond, November 29, 1988: US04788556 (41 worldwide citation)

In the particular embodiment of an ink deaerator described in the specification, an elongated ink path leading to an ink jet head is formed between two permeable membranes. The membranes are backed by air plenums which contain support members to hold the membranes in position. Reduced pressure is ap ...