公开(公告)号：US10507650B1

公开(公告)日：2019-12-17

申请号：US16040949

申请日：2018-07-20

Applicant: XEROX CORPORATION

Inventor： David L. Knierim

IPC: B41J2/045 ,  B41J2/14 ,  H01L41/09 ,  H01L41/187 ,  H01L41/04

Abstract: An energy recovery circuit in a print head includes at least one waveform rail, an array of piezoelectric actuators selectively electrically connectable to the waveform rail, the piezoelectric actuators creating a capacitive load, at least one pseudo jet capacitive load, selectively coupled to the waveform rail, depending upon how many piezoelectric actuators are connected to the waveform rail, and a first inductor coupled to the waveform rail, wherein the first inductor forms a resonant circuit with a waveform rail capacitance and returns energy to a power supply. A method of recovering energy in a print head includes providing a waveform to an array of piezoelectric actuators that are selectively electrically connectable to a waveform rail, selectively coupling at least one pseudo-jet load to the waveform rail, depending upon how many piezoelectric actuators are connected to the waveform rail, and using an inductor to form a resonant circuit with a waveform rail capacitance and to return energy to a power supply.

公开(公告)号：US20190302160A1

公开(公告)日：2019-10-03

申请号：US15940556

申请日：2018-03-29

Applicant: XEROX CORPORATION

Inventor： David L. Knierim

IPC: G01R27/26 ,  B41J2/045

Abstract: A method for measuring an impedance of each of a plurality of piezoelectric actuators of a print head, each piezoelectric actuator connected to electronic selection circuitry of the print head that drives the piezoelectric actuators during a print operation. The method includes generating a waveform to drive a drive rail of the print head, the drive rail connected to the electronic selection circuitry of the print head and measuring an impedance of each of the plurality of piezoelectrical actuators of the print head through the electronic selection circuitry.

公开(公告)号：US20190105897A1

公开(公告)日：2019-04-11

申请号：US15729382

申请日：2017-10-10

Applicant: XEROX CORPORATION

Inventor： Steven Ross Slotto ,  Jonathan R. Brick ,  David L. Knierim ,  Chad J. Slenes

IPC: B41J2/045

Abstract: An inkjet printing system, including an inlet in a print head to receive ink from an ink supply, a plurality of nozzles to eject ink in the print head, an ink pressure sensor disposed in an ink path, the ink pressure sensor configured to determine an ink pressure of the ink in the print head and output a signal indicating the ink pressure, and a controller in the print head configured to receive and process the signal indicating the ink pressure from the ink pressure sensor. The inkjet printing system may also include a memory to store an ink pressure and time profile. The controller may also output a signal to stop ejecting ink from the plurality of nozzles when the ink pressure is either below a negative threshold or above a positive threshold.

公开(公告)号：US20170361615A1

公开(公告)日：2017-12-21

申请号：US15184447

申请日：2016-06-16

Applicant: XEROX CORPORATION

Inventor： David L. Knierim

IPC: B41J2/14 ,  B23K1/00

CPC classification number: B41J2/14274 ,  B23K1/00 ,  B23K1/0016 ,  B23K1/206 ,  B23K20/026 ,  B23K20/16 ,  B23K20/24 ,  B23K2101/36 ,  B23K2103/166 ,  B41J2/1607 ,  B41J2/1643

Abstract: A method of bonding two components includes plating a first of the components with a first silver layer, a tin layer, and a second silver layer, plating a second of the components with silver, inserting the first and second components into a pre-heated press, and applying pressure to the components causing the components to bond. A stack of layers has a first component layer, a first silver layer, a tin layer, a second silver layer, a second component silver layer, and a second component layer.

公开(公告)号：US09789697B1

公开(公告)日：2017-10-17

申请号：US15220686

申请日：2016-07-27

Applicant: XEROX CORPORATION

Inventor： David L. Knierim ,  Steven Ross Slotto ,  Blake Terry Weimer

IPC: B41J2/175 ,  G01F23/24 ,  G01F23/26

CPC classification number: B41J2/17566 ,  B41J2/17513 ,  B41J2002/17579 ,  G01F23/24 ,  G01F23/241 ,  G01F23/265 ,  G01F23/266

Abstract: A fluid sensor has a first electrode, a second electrode, a housing containing the first and second electrodes, such that the electrodes extend from the housing, exposed metal between the first and second electrodes, and a drive signal electrically connected to the second electrode, such that when fluid is present in the reservoir, either the first electrode senses the presence of the fluid, or the drive signal senses presence of the fluid. A fluid sensor has a first electrode, a second electrode, a housing containing the first and second electrodes, a drive signal electrically connected to the second electrode, and sensing circuitry to measure a current from the second electrode to indicate a fluid level.

公开(公告)号：US10712376B2

公开(公告)日：2020-07-14

申请号：US15940556

申请日：2018-03-29

Applicant: XEROX CORPORATION

Inventor： David L. Knierim

IPC: G01R27/28 ,  G01R27/26 ,  B41J2/045

Abstract: A method for measuring an impedance of each of a plurality of piezoelectric actuators of a print head, each piezoelectric actuator connected to electronic selection circuitry of the print head that drives the piezoelectric actuators during a print operation. The method includes generating a waveform to drive a drive rail of the print head, the drive rail connected to the electronic selection circuitry of the print head and measuring an impedance of each of the plurality of piezoelectrical actuators of the print head through the electronic selection circuitry.

公开(公告)号：US10252524B1

公开(公告)日：2019-04-09

申请号：US15729382

申请日：2017-10-10

Applicant: XEROX CORPORATION

Inventor： Steven Ross Slotto ,  Jonathan R. Brick ,  David L. Knierim ,  Chad J. Slenes

IPC: B41J2/045 ,  B41J2/165

Abstract: An inkjet printing system, including an inlet in a print head to receive ink from an ink supply, a plurality of nozzles to eject ink in the print head, an ink pressure sensor disposed in an ink path, the ink pressure sensor configured to determine an ink pressure of the ink in the print head and output a signal indicating the ink pressure, and a controller in the print head configured to receive and process the signal indicating the ink pressure from the ink pressure sensor. The inkjet printing system may also include a memory to store an ink pressure and time profile. The controller may also output a signal to stop ejecting ink from the plurality of nozzles when the ink pressure is either below a negative threshold or above a positive threshold.

公开(公告)号：US09925773B2

公开(公告)日：2018-03-27

申请号：US15184447

申请日：2016-06-16

Applicant: XEROX CORPORATION

Inventor： David L. Knierim

IPC: B41J2/14 ,  B23K1/00

CPC classification number: B41J2/14274 ,  B23K1/00 ,  B23K1/0016 ,  B23K1/206 ,  B23K20/026 ,  B23K20/16 ,  B23K20/24 ,  B23K2101/36 ,  B23K2103/166 ,  B41J2/1607 ,  B41J2/1643

Abstract: A method of bonding two components includes plating a first of the components with a first silver layer, a tin layer, and a second silver layer, plating a second of the components with silver, inserting the first and second components into a pre-heated press, and applying pressure to the components causing the components to bond. A stack of layers has a first component layer, a first silver layer, a tin layer, a second silver layer, a second component silver layer, and a second component layer.

公开(公告)号：US09457560B2

公开(公告)日：2016-10-04

申请号：US14495596

申请日：2014-09-24

Applicant: XEROX CORPORATION

Inventor： Steven E. Ready ,  Terrance L. Stephens ,  David L. Knierim ,  David Alan Tence

IPC: B41J2/045 ,  B41J2/14

CPC classification number: B41J2/04506 ,  B41J2/0451 ,  B41J2/04581 ,  B41J2002/14354

Abstract: Systems and methods for sensing degradation of a piezoelectric actuator in a print head. One or more electrical pulses may be transmitted to the piezoelectric actuator that cause the piezoelectric actuator to bend, thereby creating a pressure wave. The pressure wave may be sensed and converted into an electrical signal. The electrical signal may be compared to a reference signal.

Abstract translation: 用于感测打印头中的压电致动器的劣化的系统和方法。 可以将一个或多个电脉冲传输到压电致动器，使得压电致动器弯曲，从而产生压力波。 可以感测压力波并将其转换成电信号。 电信号可以与参考信号进行比较。

公开(公告)号：US09016816B2

公开(公告)日：2015-04-28

申请号：US13914261

申请日：2013-06-10

Applicant: Xerox Corporation

Inventor： Takahiro Peter Terayama ,  Douglas Dean Darling ,  Russell J. Watt ,  Terrance Lee Stephens ,  James Dudley Padgett ,  Daniel Mark Platt ,  Brian Edward Williams ,  Monica Louise Maestas ,  Kenneth Eugene Strohmeyer, Jr. ,  David L. Knierim ,  John Milton Brookfield

IPC: B41J29/38 ,  B41J2/045 ,  B41J2/21

CPC classification number: B41J2/04526 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/2135

Abstract: A method for operating an inkjet printer includes identifying a pattern of ink drops ejected from an inkjet with reference to image data for a printed image, identifying a waveform component for an electrical signal operating the inkjet to eject an ink drop in the pattern of ink drops with reference to at least a portion of the image data, and generating the electrical signal with the identified waveform component to eject the ink drop in the pattern of ink drops at a first velocity onto a first location of an image receiving surface.

Abstract translation: 一种用于操作喷墨打印机的方法，包括根据打印图像的图像数据识别从喷墨喷射的墨滴的图案，识别操作喷墨的电信号的波形分量，以喷出墨滴图案中的墨滴 参考图像数据的至少一部分，并且产生具有所识别的波形分量的电信号，以将第一速度的墨滴图案中的墨滴喷射到图像接收表面的第一位置上。