Peter J Nystrom, Age 60Webster, NY

6343848, Feb 5, 2002

Jan 19, 1999

09/232820

Richard H. Berg - Greece NY
Peter J. Nystrom - Webster NY

Xerox Corporation - Stamford CT

B41J 29377

347 18

A heat sink, provides a heat transfer pathway to remove heat from the rear face of a printhead substrate. The heat sink is located between the printhead substrate and the printer carriage. The heat sink may, in one embodiment, be biased to float substantially normal to the rear face of a printhead substrate using a biasing device, such as one or more springs, or a one or more spring clips. The springs, which are compressed, tend to urge the face of the heat sink against the back face of the printhead, forming an interface between the two faces. Additional force can be provided by a carriage arm, as its radius acts as a moment arm to assist in pressing the two faces together. A low thermal heat conductivity contact resistance and an improved thermal resistance to heat dissipation between the printhead substrate and the heat sink are provided by the high pressure interface resulting from the use of the springs and the radius of the carriage arm. An additional layer of heat conductive material can be provided at the interface of the heat sink and the printhead substrate. This can reduce the ability of air pockets to form between the heat sink and the printhead substrate.

2013016, Jun 27, 2013

Feb 20, 2013

13/772201

Xerox Corporation - Norwalk CT,
Richard P. Germain - Webster NY,
Joseph A. Degroot - Hamilton MI,
Peter J. Nystrom - Webster NY,
Jun Ma - Penfield NY,

XEROX CORPORATION - Norwalk CT

B41J 2/045

347 54

Systems and methods of ejecting ink drops from an inkjet printer are disclosed. The systems and methods can include a printhead with one or more actuators with associated nozzles and membranes. A voltage waveform can be applied to the actuators to fill the actuators with a volume of ink and eject the ink through the nozzles as ink drops. The voltage waveform can have associated pre-fill voltage to fill the actuator with ink and a firing voltage to eject the ink. The actuator membranes can have multi-height dimples to protect the membranes from contacting electrodes and reduce the electric field.

8584331, Nov 19, 2013

Sep 14, 2011

13/232465

Bryan R Dolan - Rochester NY,
Peter J Nystrom - Webster NY,

Xerox Corporation - Norwalk CT

H04R 17/10
B41J 2/045
H05K 3/30

29 2535, 298901, 29829, 29844, 174254, 347 50, 347 68, 347 71, 310328, 310365

A method of forming a structure such as a print head or a printer including the print head having a flex circuit with a plurality of deformed (i. e. , contoured, shaped, or embossed) conductive flexible printed circuit (flex circuit) pads. A plurality of flex circuit pads can be aligned with a plurality of piezoelectric elements of an ink jet print head. Within a press such as a stack press, pressure can be applied to deform the plurality of flex circuit pads and to establish electrical contact between the plurality of flex circuit pads and the plurality of piezoelectric elements. Deforming the plurality of flex circuit pads in situ during the press operation can reduce costs by eliminating a separate embossing stage performed during the manufacture or formation of the flex circuit.

8585183, Nov 19, 2013

Mar 22, 2011

13/053968

Peter J. Nystrom - Webster NY,
Mark A. Cellura - Webster NY,
Gary Daniel Redding - Victor NY,

Xerox Corporation - Norwalk CT

B41J 2/045

347 68

A method for forming an ink jet print head can include attaching a plurality of piezoelectric elements to a diaphragm, dispensing an interstitial layer over the diaphragm, and forming a plurality of patterned conductive traces on the interstitial layer to physically and electrically contact the plurality of piezoelectric elements. The plurality of patterned traces can be formed using, for example, photolithography, a lift-off process, laser ablation, etc. Electrical communication between the plurality of patterned conductive traces and the plurality of piezoelectric elements can be established through surface contact between the two structures, without the requirement of a separate conductor.

8585185, Nov 19, 2013

Sep 22, 2011

13/240829

Peter J Nystrom - Webster NY,
Scott Taylor Treece - Portland OR,
Bryan R Dolan - Rochester NY,

Xerox Corporation - Norwalk CT

B41J 2/045

347 68, 347 71, 347 72, 347 50, 347 58

A method and structure for an ink jet print head which includes the use of two or more flexible circuits and a piezoelectric element array. A first pad array is included on a first flex circuit to power a first portion of the piezoelectric element array of the print head, and a second pad array is included on a second flex circuit to power a second portion of the piezoelectric element array of the print head. Using two flex circuits requires only half as many traces to be formed on each flex circuit, which can relax spacing requirements and design tolerances.

8585187, Nov 19, 2013

Apr 29, 2011

13/097182

Peter J. Nystrom - Webster NY,
Gary D. Redding - Victor NY,
Mark A. Cellura - Webster NY,

Xerox Corporation - Norwalk CT

B41J 2/045
H01L 41/22

347 70, 29 2535

A method for forming an ink jet print head can include attaching a plurality of piezoelectric elements to a diaphragm of a jet stack subassembly, electrically attaching a flex circuit to the plurality of piezoelectric elements, then dispensing an dielectric underfill between the flex circuit and the jet stack subassembly. The use of an underfill after attachment of the flex circuit eliminates the need for the patterned removal of an interstitial material from the tops of the piezoelectric elements, and removes the requirement for a patterned standoff layer. In an embodiment, electrical contact between the flex circuit and the piezoelectric elements is established through physical contact between bump electrodes of the flex circuit and the piezoelectric elements, without the use of a separate conductor, thereby eliminating the possibility of electrical shorts caused by misapplication of a conductor.

8608293, Dec 17, 2013

Oct 24, 2011

13/279778

Gary D Redding - Victor NY,
Bryan R Dolan - Rochester NY,
Mark A Cellura - Webster NY,
Peter J Nystrom - Webster NY,

Xerox Corporation - Norwalk CT

B41J 2/045
B21D 51/16
B23P 17/00

347 68, 298901

Disclosed is a process for preparing an ink jet printhead which comprises: (a) providing a diaphragm plate having a plurality of piezoelectric transducers bonded thereto; (b) aligning an electrical circuit board having a fill joint with the piezoelectric transducers and temporarily attaching the electrical circuit board to the piezoelectric transducers, thereby creating a layered structure having interstitial spaces between the diaphragm plate, the piezoelectric transducers, and the electrical circuit board; (c) applying a thermoset polymer through the fill joint and allowing it to fill the interstitial spaces via capillary action; and (d) curing the thermoset polymer to form an interstitial polymer layer.

8646875, Feb 11, 2014

Mar 31, 2010

12/751077

Peter M. Gulvin - Webster NY,
John R. Andrews - Fairport NY,
Gerald A. Domoto - Briarcliff Manor NY,
Nicholas P. Kladias - Flushing NY,
Peter J. Nystrom - Webster NY,

Xerox Corporation - Norwalk CT

B41J 2/14
B41J 2/16

347 47, 298901

Methods and systems of ejecting ink drops from an inkjet printer are disclosed. The methods and systems can include a printhead with one or more stepped nozzles each with an associated entrance diameter and exit diameter. Ink can be received into the printhead and formed into ink drops in the stepped nozzles. The ink drops can each have an associated drop mass and drop speed. The stepped nozzles can be provided such that the exit diameter can independently dictate the drop mass and the entrance diameter can independently dictate the drop speed. As such, the complexity of jet design optimization is reduced.