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    1.
    发明专利
    未知

    公开(公告)号：BR9902379A

    公开(公告)日：2000-01-18

    申请号：BR9902379

    申请日：1999-05-03

    Applicant: XEROX CORP

    Inventor： RAKER CATHLEEN J ,  LAM-CHON SUE K ,  WALLER PATRICK O ,  MAURER DANIEL R ,  WARD JOSEPH W ,  BRACCO ROSARIO A ,  SHAUL RONALD E ,  MARA ROBERT M ,  MONGEON RAYMOND L ,  MASTRANDREA JOSEPH A ,  PAPALEO PATRICIA A ,  TREMAINE COLLEEN

    IPC: G03G15/00 ,  G03G21/00

    Abstract: There is provided a method for use with a printing machine having a movable imaging member and a projecting system for modulating a beam and projecting an image into the movable imaging member. The printing machine further includes a developer for application of developer material to the image projected onto the movable imaging member for transfer of the image to a print media sheet. The method, which is intended for use in controlling exposure of a test patch on the movable imaging member includes the steps of: a) providing a time-keeping device with the time-keeping device including a variable value which is either incrementable or decrementable; b) detecting a signal indicating that the movable imaging member is positioned relative to the beam in a selected orientation, wherein the movable imaging member passes by the beam at a selected speed; c) providing a reference value with the reference value varying as a function of the selected speed; d) in response to the detecting of (b), modulating the beam, relative to the movable imaging member, so as to expose a portion for the test patch; e) concurrent with the modulating of (d), incrementing or decrementing the variable value of the time keeping device; and f) repeating said modulating of (d) until the value of the variable value is about equal to the reference value and the test patch is exposed.

    PHOTO INDUCED DISCHARGE CHARACTERISTICS (PIDC) CONTROLLER
    4.
    发明专利
    PHOTO INDUCED DISCHARGE CHARACTERISTICS (PIDC) CONTROLLER 未知

    公开(公告)号：CA2200238C

    公开(公告)日：2001-05-15

    申请号：CA2200238

    申请日：1997-03-18

    Applicant: XEROX CORP

    Inventor： SAMPATH BARBARA A ,  LAM LAI C ,  WALLER PATRICK O ,  MASTRANDREA JOSEPH A ,  MARA ROBERT M

    IPC: G03G15/02 ,  G03G15/00 ,  G03G15/01 ,  G03G15/04 ,  G03G15/043

    Abstract: An apparatus for monitoring and controlling electrical parameter of an imaging surface, the monitoring controlling apparatus including a patch gene rator for recording a first control patch at a first voltage level and a second contro l patch at a second voltage level on the imaging surface; electrostatic voltmeter for mea suring voltage potentials associated with said first control patch and second contr ol patch. A processor, in communication with said patch generator, calculates the electr icalparameters of the imaging surface from the measured voltage potentials from said first and second control patches. The processor determines a deviation between the calculated electrical parameters values and setup values. Then, the processo r produces and sends a feedback error signal to said patch generator if said d eviation exceed a threshold level. The patch generator records a third control patch at a third voltage level on the imaging surface upon reception of said error signal The ESVsenses said third control patch. The processor calcu lates the electrical parameters of the imaging surface from the measured voltage potential of the third control patch and determines a correction factor. The charging device, exposure system and dev eloper are adjusted in accordance to said correction factor

    CONTROLADOR DE CARACTERISTICAS DE DESCARGA FOTOINDUCIDA.
    6.
    发明专利
    CONTROLADOR DE CARACTERISTICAS DE DESCARGA FOTOINDUCIDA. 未知

    公开(公告)号：MX9700978A

    公开(公告)日：1997-09-30

    申请号：MX9700978

    申请日：1997-02-07

    Applicant: XEROX CORP

    Inventor： MARA ROBERT M ,  SAMPATH BARBARA A ,  LAM LAI C ,  WALLER PATRICK O ,  MASTRANDREA JOSEPH A

    IPC: G03G15/02 ,  G03G15/00 ,  G03G15/01 ,  G03G15/04 ,  G03G15/043

    Abstract: La presente invencion se refiere a un aparato para verificar y controlar un parámetro eléctrico de una superficie formadora de imagen, el aparato para control de verificacion incluye un generador de parche para registrar un primer parche de control a un primer nivel de voltaje y un segundo parche de control a un segundo nivel de voltaje en la superficie formadora de imagen; un voltímetro electrostático para medir potenciales de voltaje asociados con el primer parche de control y el segundo parche de control. Un procesador, en comunicacion con el generador de parches, calcula los parámetros eléctricos de la superficie formadora de imagen a partir de los potenciales de voltaje medidos desde el primer y segundo parches de control. El procesador determina una desviacion entre los valores de parámetros eléctricos calculados y valores pre-configurados. Luego, el procesador produce y envía una señal de error de realimentacion al generador de parches si la desviacion excede un nivel umbral. El generador de parche registra un tercer parche de control a un tercer nivel de voltaje en la superficie formadora de imagen al recibir la señal de error. El ESV detecta el tercer parche de control. El procesador calcula los parámetros eléctricos de la superficie formadora de imagen a partir del potencial de voltaje medido del tercer parche de control y determina un factor de correccion. El dispositivo de carga, sistemas de exposicion y revelador se ajustan de acuerdo con el factor de correccion.

    PHOTO INDUCED DISCHARGE CHARACTERISTICS (PIDC) CONTROLLER
    7.
    发明专利
    PHOTO INDUCED DISCHARGE CHARACTERISTICS (PIDC) CONTROLLER 未知

    公开(公告)号：CA2200238A1

    公开(公告)日：1997-09-19

    申请号：CA2200238

    申请日：1997-03-18

    Applicant: XEROX CORP

    Inventor： MARA ROBERT M ,  SAMPATH BARBARA A ,  LAM LAI C ,  WALLER PATRICK O ,  MASTRANDREA JOSEPH A

    IPC: G03G15/02 ,  G03G15/00 ,  G03G15/01 ,  G03G15/04 ,  G03G15/043

    Abstract: An apparatus for monitoring and controlling electrical parameter of an imaging surface, the monitoring controlling apparatus including a patch generator for recording a first control patch at a first voltage level and a second control patch at a second voltage level on the imaging surface; electrostatic voltmeter for measuring voltage potentials associated with said first control patch and second control patch. A processor, in communication with said patch generator, calculates the electricalparameters of the imaging surface from the measured voltage potentials from said first and second control patches. The processor determines a deviation between the calculated electrical parameters values and setup values. Then, the processor produces and sends a feedback error signal to said patch generator if said deviation exceed a threshold level. The patch generator records a third control patch at a third voltage level on the imaging surface upon reception of said error signal The ESVsenses said third control patch. The processor calculates the electrical parameters of the imaging surface from the measured voltage potential of the third control patch and determines a correction factor. The charging device, exposure system and developer are adjusted in accordance to said correction factor

    DEVELOPER COMPOSITION
    8.
    发明专利
    DEVELOPER COMPOSITION 审中-公开

    公开(公告)号：JP2003195572A

    公开(公告)日：2003-07-09

    申请号：JP2002353270

    申请日：2002-12-05

    Applicant: XEROX CORP

    Inventor： GROSS ERIC M ,  SILENCE SCOTT M ,  BUDNY THOMAS J ,  MULLER RICHARD J ,  MARA ROBERT M ,  WHIPPLE JOHN W ,  HAMBY ERIC S ,  VITURRO R ENRIQUE

    IPC: G03G9/08 ,  G03G9/10 ,  G03G9/113 ,  G03G15/08

    Abstract: PROBLEM TO BE SOLVED: To solve the problem wherein toner concentration is measured with a toner concentration (TC) sensor which is expensive but not accurate and relys on a measurement technique which is indirect and inferior in noise signal ratio, is used. SOLUTION: A developer composition having improved noise signal ratio in an optical toner concentration sensing system, including a toner having a first diffuse reflectivity and a carrier having a second diffuse reflectivity wherein the difference between the first diffuse reflectivity and the second diffuse reflectivity is substantially high. For example, the difference between the 1st diffuse reflectivity of the toner and the 2nd diffuse reflectivity of the carrier is preferably 5% or more. Consequently, the nose signal ratio of a toner concentration signal generated from an electric signal can be made relatively large according to light reflected by a transparent visual field window and a developer. COPYRIGHT: (C)2003,JPO

    ELECTROSTATIC PHOTOGRAPHIC PRINTING MACHINE, AND MONITORING/CONTROLLING METHOD FOR ELECTRIC PARAMETER ON IMAGE FORMING SURFACE
    9.
    发明专利
    ELECTROSTATIC PHOTOGRAPHIC PRINTING MACHINE, AND MONITORING/CONTROLLING METHOD FOR ELECTRIC PARAMETER ON IMAGE FORMING SURFACE 失效

    公开(公告)号：JPH103186A

    公开(公告)日：1998-01-06

    申请号：JP5592297

    申请日：1997-03-11

    Applicant: XEROX CORP

    Inventor： MARA ROBERT M ,  SAMPATH BARBARA A ,  LAM LAI C ,  WALLER PATRICK O ,  MASTRANDREA JOSEPH A

    IPC: G03G15/02 ,  G03G15/00 ,  G03G15/01 ,  G03G15/04 ,  G03G15/043

    Abstract: PROBLEM TO BE SOLVED: To provide a device for monitoring/controlling the electric parameter of an image forming surface. SOLUTION: A monitoring/controlling device includes a patch generator for recording a first control patch at a first voltage level and a second control patch at a second voltage level, on the image forming surface and an electrostatic wattmeter for measuring potentials related to the first and second control patches. A processor cooperated with the patch generator calculates the electric parameter of the image forming surface from the potentials measured from the first and second control patches. The processor decides the deviation between the calculated electric parameter value and a set up value. When the deviation exceeds a threshold level, the processor generates a feedback error signal and transmits it to the patch generator. This patch generator receives the error signal, to record a third control patch at a third voltage level on the image forming surface. An ESV senses the third control patch and the processor calculates the electric parameter on the image forming surface from the measured parameter of the third control patch, to decide a correction factor. A charge device, an exposure system and a developer are adjusted according to the correction factor.

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