-
公开(公告)号：DE60220195T2
公开(公告)日：2007-09-06
申请号：DE60220195
申请日：2002-01-16
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , DEJONG JOANNES N M , WILLIAMS LLLOYD A , ANDERSON HAROLD M
Abstract: An apparatus and method are provided for the use of an optical sensor to determine the position of a printing device relative to a piece of paper or a paper-handling surface. The optical sensor reads marks to detect movement and/or direction of movement or spacing of imprints on the paper. Benefits include swath stitching calibration, color to color registration, producing printing device alignment data and generating information for printing device firing signals. The present invention is applicable to a wide field of printing technologies, including, but not limited to, acoustic ink printing, thermal ink jet printing, piezo ink jet printing, ionographic printing and a variety of other printing technologies involving the need for positioning a printing device relative to a piece of paper.
-
公开(公告)号：BRPI0603474A
公开(公告)日：2007-04-27
申请号：BRPI0603474
申请日：2006-08-29
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 (20), 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 (VA,VB); 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 (²) 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 (10) 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 (NA,NB) 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.
-
公开(公告)号：DE69321999T2
公开(公告)日：1999-05-20
申请号：DE69321999
申请日：1993-06-15
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , ANDERSON HAROLD M
Abstract: In an image forming device, the inherent eccentricities of the photosensitive belts or drums and the timing belt speed reduction drive trains cause misregistration of the developed latent images. To prevent such misregistration, the timing belt (48) of the speed reduction drive train (42) has a peripheral length which is selected from a range of values dependent on a preselected speed reduction ratio n between the driven pulley (46) and the driving pulley (44). Further, each one of the range of values is an integral improper fraction or integral multiple of the circumference of the driven pulley. Moreover, the driving pulley (50) of the last pulley belt set coupled to the photosensitive member (40) and a driven pulley (46) prior to the last pulley belt set rotate n full rotations as the photosensitive member rotates from the image forming location to the image transfer location. In conjunction, every speed reduction ratio of all pulley belt sets prior to the last pulley belt set is an integer value. Thus, the eccentricities will be self-compensated.
-
公开(公告)号：CA2051897C
公开(公告)日：1999-03-23
申请号：CA2051897
申请日：1991-09-19
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , CASSANO JAMES R , DASTIN RICHARD M , KOSKO JOHN E
Abstract: An apparatus which advances a sheet through a transfer zone and into registration with information developed on a moving member. The sheet is advanced to a position wherein a leading portion thereof is immediately ahead of the transfer zone relative to the forward direction of movement of the moving member and a trailing portion thereof is within the transfer zone. The trailing portion of the sheet is advanced through the transfer zone at a first velocity and the leading edge of the sheet is advanced in a region immediately ahead of the transfer zone at a second velocity, which is less than the first velocity, so as to create a buckle in the leading portion of the sheet positioned immediately ahead of the transfer zone relative to the forward direction of movement of the moving member. The buckle functions to eliminate relative velocity between the photoconductive belt and any portion of sheet within the transfer zone so as to substantially eliminate slip between the sheet and the photoconductive belt.
-
公开(公告)号：DE60214445D1
公开(公告)日：2006-10-19
申请号：DE60214445
申请日：2002-01-16
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , DEJONG JOANNES N M , WILLIAMS LLLOYD A , ANDERSON HAROLD M
-
Patent Agency Ranking
公开(公告)号：DE69120046T2
公开(公告)日：1996-11-28
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
-
公开(公告)号：DE69113014D1
公开(公告)日：1995-10-19
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).
-
公开(公告)号：DE3071947D1
公开(公告)日：1987-05-14
申请号：DE3071947
申请日：1980-06-16
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , HAMAKER RALPH ADOLF
IPC: B65G15/64 , B65G39/071 , G03G15/00 , G03G21/00
Abstract: An apparatus in which the lateral movement of a belt arranged to move along a pre-determined path is controlled. The apparatus includes a belt sensor mounted translatably on a belt support. As the belt moves laterally, the sensor translates therewith causing the belt support to pivot so as to return the belt to the pre-determined path.
-
公开(公告)号：CA1159887A
公开(公告)日：1984-01-03
申请号：CA350190
申请日：1980-04-18
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , HAMAKER RALPH A
IPC: B65G15/64 , B65G39/071 , G03G15/00 , G03G21/00
Abstract: An apparatus in which the lateral movement of a belt arranged to move along a pre-determined path is controlled. The apparatus includes a belt sensor mounted translatably on a belt support. As the belt moves laterally, the sensor translates therewith causing the belt support to pivot so as to return the belt to the pre-determined path.
-
公开(公告)号：CA1123483A
公开(公告)日：1982-05-11
申请号：CA349704
申请日：1980-04-11
Applicant: XEROX CORP
Inventor： CASTELLI VITTORIO , HAMAKER RALPH A , CHAI STEPHEN
IPC: G03G15/00
Abstract: An apparatus and method of use in which a first photoconductive belt arranged to move about an endless operative path in an electrophotographic printing machine is replaced by a second photoconductive belt. The leading marginal region of the second photoconductive belt is secured to the first photoconductive belt. As the first photoconductive belt moves about the operative path, it positions the second photoconductive belt thereabout. After the second photoconductive belt is positioned about the operative path, the first photoconductive belt is removed therefrom and separated from the second photoconductive belt. The leading marginal region of the second photoconductive belt is then secured to the trailing marginal region thereof.
-
-
-
-
-
-
-
-
-
Search Results
43
records
(took 0.022 seconds)
