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    POWER CONTROL SYSTEM FOR A PRINTER
    1.
    发明专利
    POWER CONTROL SYSTEM FOR A PRINTER 未知

    公开(公告)号：CA2138418C

    公开(公告)日：1999-02-23

    申请号：CA2138418

    申请日：1994-12-19

    Applicant: XEROX CORP

    Inventor： STEPHANY JOSEPH F ,  WATROBSKI THOMAS E ,  BECERRA JUAN J ,  JOHN PETER J ,  KNEEZEL GARY A ,  LADONNA RICHARD V ,  WYSOCKI JOSEPH J

    IPC: B41J2/05 ,  B41J2/355

    Abstract: A control system for a printer having at least one heating element for producing spots applies one of a plurality of voltage levels to at least one heating element disposed on a printhead. A voltage supply supplies a voltage to a first one of a plurality of switches connected in series with a last one of the switches being connected to the at least one heating element. At least one of the switches defines a first path and a second path having different voltage drops. A controller coupled to the plurality of switches selectively actuates the switches to apply one of a plurality of predetermined voltages to the at least one heating element.

    3.
    发明专利
    未知

    公开(公告)号：DE69331363T2

    公开(公告)日：2002-06-20

    申请号：DE69331363

    申请日：1993-09-22

    Applicant: XEROX CORP

    Inventor： HAWKINS WILLIAM G ,  WATROBSKI THOMAS E ,  VANDEROEK SOPHIE ,  BURKE CATHIE J ,  TELLIER THOMAS A

    IPC: H01L27/04 ,  H01L21/822 ,  H01L27/02

    Abstract: An electrostatic discharge protection (ESD) device for a connector associated with an integrated circuit chip, particularly one associated with a thermal ink-jet printhead. A MOS field effect device (60) extends along at least one edge of the connector (32) on the chip. A bipolar transistor (66-70), parasitic to the field effect device (60), conducts current from the connector (32) to ground (52) in response to a voltage between the connector (32) and ground (52) in excess of a predetermined threshold. A zone (90) of a predetermined electrical resistance is operatively disposed between the bipolar transistor (66-70) and ground (52). The zone (90) may substantially encircle (Fig 4) the bonding pad (32) of the connector to evenly distribute local incidences of high voltage. The invention enables integrated circuits to pass ESD requirements of office products, which is 15kV by Human Body Model testing.

    4.
    发明专利
    未知

    公开(公告)号：DE69331363D1

    公开(公告)日：2002-01-31

    申请号：DE69331363

    申请日：1993-09-22

    Applicant: XEROX CORP

    Inventor： HAWKINS WILLIAM G ,  WATROBSKI THOMAS E ,  VANDEROEK SOPHIE ,  BURKE CATHIE J ,  TELLIER THOMAS A

    IPC: H01L27/04 ,  H01L21/822 ,  H01L27/02

    Abstract: An electrostatic discharge protection (ESD) device for a connector associated with an integrated circuit chip, particularly one associated with a thermal ink-jet printhead. A MOS field effect device (60) extends along at least one edge of the connector (32) on the chip. A bipolar transistor (66-70), parasitic to the field effect device (60), conducts current from the connector (32) to ground (52) in response to a voltage between the connector (32) and ground (52) in excess of a predetermined threshold. A zone (90) of a predetermined electrical resistance is operatively disposed between the bipolar transistor (66-70) and ground (52). The zone (90) may substantially encircle (Fig 4) the bonding pad (32) of the connector to evenly distribute local incidences of high voltage. The invention enables integrated circuits to pass ESD requirements of office products, which is 15kV by Human Body Model testing.

    Method and Apparatus for Interleaving Pulses in a Liquid Recorder
    5.
    发明专利
    Method and Apparatus for Interleaving Pulses in a Liquid Recorder 未知

    公开(公告)号：CA2168994A1

    公开(公告)日：1996-09-09

    申请号：CA2168994

    申请日：1996-02-07

    Applicant: XEROX CORP

    Inventor： BECERRA JUAN J ,  COURTNEY THOMAS P ,  LADONNA RICHARD L ,  TELLIER THOMAS A ,  WATROBSKI THOMAS E ,  WYBLE THOMAS J

    IPC: B41J2/01 ,  B41J2/05 ,  B41J11/42 ,  G03G21/14 ,  B41J27/00 ,  B41F31/00 ,  B41F15/40

    Abstract: A liquid recording apparatus ejects droplets of liquid onto a recording medium. The apparatus has multiple liquid emitters (46) whose emissions are activated (51,66) by multiple power pulses. The power pulses are controlled to maximize the number of emitters which can be simultaneously energized while keeping the instantaneous power usage within prescribed boundaries. The multiple emitters are organized into banks of emitters (96) whose numbers are small enough that all emitters within a bank can receive a correct level of power simultaneously without exceeding capacity of a shared power source. A circuit (67) interleaves the power pulses to the emitters so that no bank of emitters are receiving power at the same instant of time. In this fashion, the recording apparatus can achieve maximum recording speed while employing the smallest capacity power source (66) which is practicable.

    7.
    发明专利
    未知

    公开(公告)号：DE69632657D1

    公开(公告)日：2004-07-15

    申请号：DE69632657

    申请日：1996-03-07

    Applicant: XEROX CORP

    Inventor： BECERRA JUAN J ,  TELLIER THOMAS A ,  COURTNEY THOMAS P ,  WATROBSKI THOMAS E ,  LADONNA RICHARD L ,  WYBLE THOMAS J

    IPC: B41J2/01 ,  B41J2/05 ,  B41J11/42 ,  G03G21/14

    Abstract: A liquid recording apparatus ejects droplets of liquid onto a recording medium. The apparatus has multiple liquid emitters (46) whose emissions are activated (51,66) by multiple power pulses. The power pulses are controlled to maximize the number of emitters which can be simultaneously energized while keeping the instantaneous power usage within prescribed boundaries. The multiple emitters are organized into banks of emitters (96) whose numbers are small enough that all emitters within a bank can receive a correct level of power simultaneously without exceeding capacity of a shared power source. A circuit (67) interleaves the power pulses to the emitters so that no bank of emitters are receiving power at the same instant of time. In this fashion, the recording apparatus can achieve maximum recording speed while employing the smallest capacity power source (66) which is practicable.

    9.
    发明专利
    未知

    公开(公告)号：BR9704847A

    公开(公告)日：1998-11-17

    申请号：BR9704847

    申请日：1997-05-19

    Applicant: XEROX CORP

    Inventor： BECERRA JUAN J ,  WATROBSKI THOMAS E

    IPC: B41J2/175 ,  G01D15/16

    Abstract: An ink jet printing system includes an ink jet printhead which has an n-bit code representing a unique characteristic of the printhead formed on a substrate forming a part of the printhead. An n-bit data code is sent from a remote source to the printhead. If the data code matches the code on the printhead, printing operation is initiated. If the code is not matched, the print operation is inhibited.

    10.
    发明专利
    未知

    公开(公告)号：BR9600953A

    公开(公告)日：1997-12-30

    申请号：BR9600953

    申请日：1996-03-07

    Applicant: XEROX CORP

    Inventor： BECERRA JUAN J ,  COURTNEY THOMAS P ,  LADONNA RICHARD L ,  TELLIER THOMAS A ,  WATROBSKI THOMAS E ,  WYBLE THOMAS J

    IPC: B41J2/01 ,  B41J2/05 ,  B41J11/42 ,  G03G21/14 ,  B41J27/20

    Abstract: A liquid recording apparatus ejects droplets of liquid onto a recording medium. The apparatus has multiple liquid emitters (46) whose emissions are activated (51,66) by multiple power pulses. The power pulses are controlled to maximize the number of emitters which can be simultaneously energized while keeping the instantaneous power usage within prescribed boundaries. The multiple emitters are organized into banks of emitters (96) whose numbers are small enough that all emitters within a bank can receive a correct level of power simultaneously without exceeding capacity of a shared power source. A circuit (67) interleaves the power pulses to the emitters so that no bank of emitters are receiving power at the same instant of time. In this fashion, the recording apparatus can achieve maximum recording speed while employing the smallest capacity power source (66) which is practicable.

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