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公开(公告)号：DE69113014T2
公开(公告)日：1996-05-02
申请号：DE69113014
申请日：1991-12-20
Applicant: XEROX CORP
Inventor： DURLAND SCOTT C , CASTELLI VITTORIO , CASSANO JAMES R , SHAVERS DANIEL R , DASTIN RICHARD M , TABER MICHELE D
Abstract: An apparatus (48) which advances a sheet (25) through a transfer zone (64) and into registration with information developed on a moving member (20). The sheet (25) is advanced to a position wherein a leading portion thereof is within the transfer zone (64) and a trailing portion thereof is immediately behind the transfer zone (64) relative to the forward direction of movement of the moving member (20). The leading portion of the sheet (25) is advanced through the transfer zone (64) at a first velocity and the trailing portion of the sheet (25) is advanced in a region immediately behind the transfer zone (64) at a second velocity, which is greater than the first velocity, so as to create a buckle (19) in the trailing portion of the sheet (25) in the region. The buckle (19) functions to eliminate relative velocity between the photoconductive belt (20) and any portion of sheet (25) within the transfer zone (64) so as to substantially eliminate slip between the sheet (25) and the photoconductive belt (20).
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公开(公告)号：CA1178233A
公开(公告)日：1984-11-20
申请号：CA408146
申请日：1982-07-27
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , HAMAKER RALPH A , OPOCENSKY WILLARD J
Abstract: An apparatus which controls lateral alignment of a belt arranged to move along a predetermined path. The belt is supported by a pivoted roller. A member having a pair of opposed, spaced flanges extending outwardly therefrom is mounted slidably on a shaft extending outwardly from one end of the roller. A spring, contacting the flanged member, resiliently urges one of the flanges into continuous engagement with one side of the belt. Movement of the belt from the predetermined path slides the flanged member so that one of the flanges frictionally rotates a disc interposed therebetween. Rotation of the disc tilts the roller restoring the belt to the predetermined path of movement.
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公开(公告)号：BRPI0603541A
公开(公告)日：2007-04-27
申请号：BRPI0603541
申请日：2006-08-30
Applicant: XEROX CORP
Inventor： DEJONG JOANNES N M , CASTELLI VITTORIO , PARK DANIEL C , WILLIAMS LLOYD A
Abstract: Embodiments according to the present disclosure provide methods and systems of determining nip velocity profiles in a medium registration system, including parameterizing a set of equations into a set of standard parameters, the set of equations representing an analytic form of the nip velocity profiles; determining values of the parameters through an iteration process; and determining the nip velocity profiles based on the determined values of the parameters. The embodiments separately provide systems and methods of simulating a medium registration process, including inputting an error parameter to a velocity nominal profile of a nip in a medium registration system; determining an output value of the velocity nominal profile; and using the output value in a regression algorithm to obtain a simulated relationship, the simulated relationship indicative of a manner in which the error parameter influences the output value. The embodiments separately provide systems and methods of determining an angular velocity of a medium relative to a nip in a medium registration system, including determining a path of the nip on the medium; and determining the angular velocity as a function of a position of the nip in the path. The embodiments separately provide systems and methods of controlling nips of a medium registration system, including wagging a medium relative to a center line of two nips of the medium registration system; and then unwagging the medium relative to the center line of the two nips.
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公开(公告)号：BRPI0503194A
公开(公告)日：2006-03-21
申请号：BRPI0503194
申请日：2005-07-29
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , DEJONG JOANNES N M , WILLIAMS LLOYD A , DONDIEGO MATTHEW , NOWAK WILLIAM J
IPC: G03G15/00
Abstract: An imaging device for producing multicolor images from image data containing data representing an image of a first color and an image of a second color to be registered relative to the image of the first color onto a substrate by transferring toner of the first and second colors to the substrate is provided. The imaging device includes a first imager, a second imager, a photoreceptor belt, a plurality of rollers mounted to a frame of the imaging device, an angular position sensor, an image data source and a controller. The plurality of rollers define a process path along which the photoreceptor belt is driven past the first and second imagers in a process direction. The plurality of rollers includes a drive roller that exhibits an eccentricity for which a formula relating angular position as a function of the phase angle of the drive roller to eccentricity is known. The angular position sensor detects the phase angle of the drive roller. The image data source generates image data that includes a line to be printed in the first color and in the second color. The controller is coupled to receive signals from the angular position sensor, ROS imager and image data source and is configured to drive the second imager to generate an optical output. The controller includes memory and a processor. The memory stores the formula relating angular position as a function of the phase angle of the drive roller to eccentricity. The processor calculates an appropriate time delay for starting the generation of the optical output of the second imager for printing the line to be printed in the first color and in the second color based on the time of the starting of the optical output by the ROS imager to print to print that line, the signal received from the angular position sensor, and the formula relating angular position as a function of the phase angle of the drive roller to eccentricity.
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公开(公告)号：DE60017533D1
公开(公告)日：2005-02-24
申请号：DE60017533
申请日：2000-11-24
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , LOFTHUS ROBERT M , WOLF BARRY , ANDERSON HAROLD
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Patent Agency Ranking
公开(公告)号：DE69314696D1
公开(公告)日：1997-11-27
申请号：DE69314696
申请日：1993-05-10
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , CASELLA JAMES M , WILLIAMS LLOYD , DE JONG JOANNES
Abstract: An encoder interface for interfacing an encoder having a first part (104) defining a first axis to a structure having a second part (106) defining a second axis substantially parallel to the first axis includes a portion for translating the first part (104) with respect to the second part (106) in a direction transverse to the first axis and a portion for rigidly rotationally stabilizing the first part (104) with respect to the second part (106) against a rotation of the first part (104) about the first axis induced by a translation of the first part (104) with respect to the second part (106) in the direction transverse to the first axis. A method for interfacing an encoder having a first part (104) defining a first axis with a structure having a second part (106) defining a second axis substantially parallel to the first axis includes the steps of translating the first part (104) with respect to the second part (106) in a direction transverse to the first axis and rigidly rotationally stabilizing the first part (104) with respect to the second part (106) against a rotation of the first part (104) about the first axis induced by a translation of the first part (104) with respect to the second part (106) in the direction transverse to the first axis.
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公开(公告)号：DE69306539T2
公开(公告)日：1997-06-12
申请号：DE69306539
申请日：1993-11-25
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO
IPC: B41J2/525 , G03G15/01 , G03G21/00 , G03G21/14 , H04N1/047 , H04N1/113 , H04N1/12 , H04N1/50 , G03G15/00
Abstract: A single-pass color printer provides registration by controlling the velocity of the photoreceptor (44;Fig. 1) as a plurality of color separation latent images are superimposed on an area of the photoreceptor. The velocity of the photoreceptor is controlled by averaged error values vij. The averaged error values vij are determined periodically for the same photoreceptor or when an old photoreceptor is replaced with a new photoreceptor or when a user depresses a button in a display to recalibrate the averaged error values vij after noticing degradation of print quality. The averaged error values are based upon at least one of time deviations (Tij), average transit times (Tl*) and average velocities (Vl*) of areas of the photoreceptor on which the latent images are formed. The calibration of the velocity variations is equivalent to a calibration of the belt thickness uniformity. Further, the method of determining or calibrating the averaged error values vij can be used to verify that the method was properly done.
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公开(公告)号：DE69306539D1
公开(公告)日：1997-01-23
申请号：DE69306539
申请日：1993-11-25
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO
IPC: B41J2/525 , G03G15/01 , G03G21/00 , G03G21/14 , H04N1/047 , H04N1/113 , H04N1/12 , H04N1/50 , G03G15/00
Abstract: A single-pass color printer provides registration by controlling the velocity of the photoreceptor (44;Fig. 1) as a plurality of color separation latent images are superimposed on an area of the photoreceptor. The velocity of the photoreceptor is controlled by averaged error values vij. The averaged error values vij are determined periodically for the same photoreceptor or when an old photoreceptor is replaced with a new photoreceptor or when a user depresses a button in a display to recalibrate the averaged error values vij after noticing degradation of print quality. The averaged error values are based upon at least one of time deviations (Tij), average transit times (Tl*) and average velocities (Vl*) of areas of the photoreceptor on which the latent images are formed. The calibration of the velocity variations is equivalent to a calibration of the belt thickness uniformity. Further, the method of determining or calibrating the averaged error values vij can be used to verify that the method was properly done.
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公开(公告)号：DE69120046D1
公开(公告)日：1996-07-11
申请号：DE69120046
申请日：1991-12-20
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , CASSANO JAMES R , DASTIN RICHARD M , KOSKO JOHN E
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公开(公告)号：DE3279132D1
公开(公告)日：1988-11-24
申请号：DE3279132
申请日：1982-08-31
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , HAMAKER RALPH A , OPOCENSKY WILLARD J
Abstract: An apparatus which controls lateral alignment of a belt (14 or 44) arranged to move along a predetermined path. The belt is supported by a pivoted roller (20 or 46). A member (118) having a pair of opposed, spaced flanges (114, 116) extending outwardly therefrom is mounted slidably on a shaft (112) extending outwardly from one end of the roller. A spring (130), contacting the flanged member (118), resiliently urges one of the flanges into continuous engagement with one side of the belt. Movement of the belt (114, 116) from the predetermined path slides the flanged member (118) so that one of the flanges (114, 116) frictionally rotates a dise (120) interposed there-between. Rotation of the disc (120) tilts the roller (20 or 46) restoring the belt to the predetermined path of movement.
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