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公开(公告)号：BRPI0404717A
公开(公告)日：2005-06-21
申请号：BRPI0404717
申请日：2004-10-28
Applicant: XEROX CORP
Inventor： GROSS ERIC M , MCCONVILLE PAUL J , LECLERC GERALD SCOTT , MASTRANDREA JOSEPH A , HIRSCH MARK J
Abstract: An apparatus for developing a latent image recorded on a movable imaging surface, including: a reservoir for storing a supply of developer material including toner particles, said reservoir including a transport member; a donor member being arranged to receive toner particles from said transport member and to deliver toner particles to the image surface at locations spaced apart from each other in the direction of movement of the imaging surface thereby to develop the latent image thereon; a power supply, connected to said donor member, for biasing said donor member to deliver toner to the image surface during a printing mode of operation; a second power supply, connected to the transport member, for maintaining a predefined voltage difference between the transport member and the donor member such that toner particles are attracted to the donor member from the transport member during a printing mode of operation; a controller for generating a donor member purge signal trigger based on sensed or calculated development conditions; and a power supply controller, responsive to said donor member purge signal, for changing the voltage between the donor member and the transport member during a second mode of operation thereby causing toner to partially or completely transfer back to said transport member and optionally transported to the imaging surface.
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公开(公告)号：DE69730638D1
公开(公告)日：2004-10-21
申请号：DE69730638
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
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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
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公开(公告)号：CA2485764C
公开(公告)日：2009-07-07
申请号：CA2485764
申请日：2004-10-22
Applicant: XEROX CORP
Inventor： LECLERC GERALD SCOTT , MASTRANDREA JOSEPH A , GROSS ERIC M , HIRSCH MARK J , MCCONVILLE PAUL J
Abstract: An apparatus for developing a latent image recorded on a movable imaging surface, including: a reservoir for storing a supply of developer material including toner particles, said reservoir including a transport member; a donor member being arranged to receive toner particles from said transport member and to deliver toner particles to the image surface at locations spaced apart from each other in the direction of movement of the imaging surface thereby to develop the latent image thereon; a power supply, connected to said donor member, for biasing said donor member to deliver toner to the image surface during a printing mode of operation; a second power supply, connected to the transport member, for maintaining a predefined voltage difference between the transport member and the donor member such that toner particles are attracted to the donor member from the transport member during a printing mo de of operation; a controller for generating a donor member purge signal trigger based on sensed or calculated development conditions; and a power supply controller, responsive to said donor member purge signal, for changing the voltage between the dono r member and the transport member during a second mode of operation thereby causing toner to partially or completely transfer back to said transport member and optionall y transported to the imaging surface.
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公开(公告)号：DE602005003052D1
公开(公告)日：2007-12-13
申请号：DE602005003052
申请日：2005-05-18
Applicant: XEROX CORP
Inventor： GROSS ERIC M , MASTRANDREA JOSEPH A , PACER JAMES M , STOOKEY DAVID R , KUEK SOON K , HAMBY ERIC S
Abstract: A method and apparatus for implementing statistical process control (SPC) in a printing environment to address errant reads of control sensors is provided. The system uses SPC, in systems having feedback control based on control sensor data, to identify errant reads and ensure that such errant reads are not used in the applicable feedback loop. Unnecessary reaction to the errant reads is thus avoided.
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Patent Agency Ranking
公开(公告)号：DE602005003052T2
公开(公告)日：2008-02-14
申请号：DE602005003052
申请日：2005-05-18
Applicant: XEROX CORP
Inventor： GROSS ERIC M , MASTRANDREA JOSEPH A , PACER JAMES M , STOOKEY DAVID R , KUEK SOON K , HAMBY ERIC S
Abstract: A method and apparatus for implementing statistical process control (SPC) in a printing environment to address errant reads of control sensors is provided. The system uses SPC, in systems having feedback control based on control sensor data, to identify errant reads and ensure that such errant reads are not used in the applicable feedback loop. Unnecessary reaction to the errant reads is thus avoided.
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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
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.
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公开(公告)号：BR9701316A
公开(公告)日：1998-08-25
申请号：BR9701316
申请日：1997-03-17
Applicant: XEROX CORP
Inventor： WALLER PATRICK O , LAM LAI C , SAMPATH BARBARA A , MASTRANDREA JOSEPH A , MARA ROBERT M
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公开(公告)号：CA2485764A1
公开(公告)日：2005-04-29
申请号：CA2485764
申请日：2004-10-22
Applicant: XEROX CORP
Inventor： MASTRANDREA JOSEPH A , LECLERC GERALD SCOTT , HIRSCH MARK J , MCCONVILLE PAUL J , GROSS ERIC M
Abstract: An apparatus for developing a latent image recorded on a movable imaging surface, including: a reservoir for storing a supply of developer material including toner particles, said reservoir including a transport member; a donor member being arranged to receive toner particles from said transport member and to deliver toner particles to the image surface at locations spaced apart from each other in the direction of movement of the imaging surface thereby to develop the latent image thereon; a power supply, connected to said donor member, for biasing said donor member to deliver toner to the image surface during a printing mode of operation; a second power supply, connected to the transport member, for maintaining a predefined voltage difference between the transport member and the donor member such that toner particles are attracted to the donor member from the transport member during a printing mo de of operation; a controller for generating a donor member purge signal trigger based on sensed or calculated development conditions; and a power supply controller, responsive to said donor member purge signal, for changing the voltage between the dono r member and the transport member during a second mode of operation thereby causing toner to partially or completely transfer back to said transport member and optionall y transported to the imaging surface.
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公开(公告)号：DE69730638T2
公开(公告)日：2005-02-10
申请号：DE69730638
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
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