公开(公告)号：DE69817709T2

公开(公告)日：2004-03-11

申请号：DE69817709

申请日：1998-07-17

Applicant: XEROX CORP

Inventor： FOLKINS JEFFREY J ,  SHAHIN MICHAEL A ,  SMITH CRAIG A ,  PARISI MICHAEL A ,  MESTHA LINGAPPA K

IPC: B41M3/14 ,  G03G21/04 ,  H04N1/00

Abstract: A method comprising: providing a facility with at least one controlled access electronic printing machine; printing original documents with said controlled access electronic printing machine, wherein printed images formed thereby arise from marking materials containing at least one photoactive additive; equipping all uncontrolled access reprographic devices within said facility with a secure illumination source capable of exposing an object document with sufficient intensity to activate said photoactive additive; and illuminating said object document with said secure illumination source of said uncontrolled access reprographic device, wherein said object documents having original document images printed thereon cannot be copied or scanned in a normal copy or scan illumination interval.

公开(公告)号：DE69814534T2

公开(公告)日：2003-12-18

申请号：DE69814534

申请日：1998-06-30

Applicant: XEROX CORP

Inventor： FOLKINS JEFFREY J

IPC: B41J2/525 ,  G03G15/01 ,  G03G15/02

Abstract: A color REaD IOI system in which the photoreceptor (10) is DC only recharged between the development of the first toner layer and the subsequent exposure and development of the following toner layer. To assist the DC only recharge by device 20 the photoreceptor (10) and the first toner layer are beneficially erased prior to recharge. Beneficially, the photoreceptor (10) is subsequent recharged prior to exposures for the other toner layers using a charging scheme that includes an AC charging device (22).

公开(公告)号：DE69531391D1

公开(公告)日：2003-09-04

申请号：DE69531391

申请日：1995-12-12

Applicant: XEROX CORP

Inventor： FOLKINS JEFFREY J ,  COSTANZA DANIEL W

IPC: G03G15/00 ,  G03G15/01 ,  G03G15/36 ,  H04N1/50 ,  H04N1/46

Abstract: A method and apparatus for achieving optimum optical contrast for detecting registration marks in a multicolor print-black-first, color electrophotographic printing machine. A black mask having voids in the shape of a registration mark is formed on the photoreceptor (10). A high contrast color is then overwritten on the mask and in the voids, forming marks which indicate the position of the black image. A delay time measurement between a registration mark of a non-black color and the non-black color in the voids of the black mask will provide the relative registration between the black and non-black color imagers as those registration marks on the photoreceptor pass a marks-on-belt sensor. A second method utilizes a registration mark imaged by each imager of the color printing machine, but all of the latent image registration marks are developed with a single non-black color toner. A mark-on-belt sensor is then used to determine the relative position of the various color imagers and to send signals to the controller to make appropriate corrections.

公开(公告)号：DE69806110D1

公开(公告)日：2002-07-25

申请号：DE69806110

申请日：1998-07-14

Applicant: XEROX CORP

Inventor： FOLKINS JEFFREY J

IPC: G03G15/01 ,  G03G15/08 ,  G03G15/00

Abstract: The unit is constructed as an integrated in-line developer unit (100). Above each development station (E,F,G,H) is a toner dispenser (102,104,106.108) separated by common walls (122,124,126,128). Each dispenser and developer unit contains a different colour of toner. The dispensers deliver toner to the developer units. Toner moving auger (140) is controlled by a toner moving controller (141). The toner auger passes through the common walls and has a toner moving section (142,144,146,148) in each dispenser, all the sections rotate when the auger is actuated. The wall channels have seals (162,164,166,168) to allow the auger to pass through the walls. The auger sections move the toner to dispenser openings (172,174,176,178). A gating device (180) controls the flow of toner from the dispenser to the developing units. The gating has openings (182,184,186,188) aligned with toner dispenser openings to allow toner from toner dispenser to developer units.

公开(公告)号：BR9505518A

公开(公告)日：1997-10-28

申请号：BR9505518

申请日：1995-11-24

Applicant: XEROX CORP

Inventor： FOLKINS JEFFREY J ,  BULLOCK ROGER L ,  FLECK THOMAS J ,  PIETROWSKI KENNETH W ,  TABB CHARLES H ,  YU ZHAO-ZHI ,  GWALTNEY MARK A

IPC: G03G15/02 ,  G03G15/01

Abstract: In a multi-color imaging apparatus utilizing a recharge step (d) between two image creation steps (B,C;38,E) for recharging a charge retentive surface (10) to a predetermined potential pursuant to forming the second of the two images, a first corona generating device (36) recharges the charge retentive surface to a higher absolute potential than the predetermined potential, and then a second corona generating device (37) recharges the charge retentive surface to the predetermined potential. An electrical charge associated with the first image is substantially neutralized after being recharged by the first and second corona generating device.

公开(公告)号：DE69309384D1

公开(公告)日：1997-05-07

申请号：DE69309384

申请日：1993-10-01

Applicant: XEROX CORP

Inventor： BEHE THOMAS J ,  FOLKINS JEFFREY J ,  LIOY GERALD T ,  BREWINGTON GRACE T ,  SCHRAM JOSEPH G ,  WAYMAN WILLIAM H

IPC: G03G15/06 ,  G03G15/08 ,  G03G15/09

Abstract: A donor roll (40) for the conveyance of toner in a development system for an electrophotographic printer includes an outer surface (42) of phenolic resin. The resin is doped to a suitable conductivity to facilitate a discharge time constant thereon of less than 300 microseconds. The donor roll is used in conjunction with an electrode structure (41) to provide scavengeless development of an electrostatic latent image on a charge-retaining member (10).

公开(公告)号：DE69202033T2

公开(公告)日：1995-12-21

申请号：DE69202033

申请日：1992-08-12

Applicant: XEROX CORP

Inventor： FOLKINS JEFFREY J

IPC: G03G15/06 ,  G03G15/08

公开(公告)号：DE68921612T2

公开(公告)日：1995-10-19

申请号：DE68921612

申请日：1989-05-31

Applicant: XEROX CORP

Inventor： FOLKINS JEFFREY J

IPC: G03G15/09

公开(公告)号：DE3371713D1

公开(公告)日：1987-06-25

申请号：DE3371713

申请日：1983-06-28

Applicant: XEROX CORP

Inventor： FOLKINS JEFFREY J

IPC: G03G15/06 ,  G03G15/08 ,  G03G15/09

Abstract: An apparatus (20) for developing an image region recorded on a photoconductive surface (12) with a dry developer material. A transport (52) moves the dry material closely adjacent to the photoconductive surface (12). The charge induced on the transport (52) by the charge on the photoconductive surface is controlled (58,60) to electrically bias the transport to a potential intermediate the potential of the image region and non-image region of the photoconductive surface.

公开(公告)号：CA1213314A

公开(公告)日：1986-10-28

申请号：CA454823

申请日：1984-05-22

Applicant: XEROX CORP

Inventor： FOLKINS JEFFREY J ,  HAQUE SHAHID ,  LOEB ALFRED M ,  TILL HENRY R

IPC: G03G15/08 ,  G03G15/09

Abstract: An apparatus which develops a latent image with marking particles. The apparatus includes a developer roller which transports the marking particles closely adjacent to the latent image. As the marking particles are deposited on the latent image, the developer roller senses the charge thereon. In response to the sensed charge of the marking particles, additional marking particles are dispensed into the chamber of the housing for subsequent use by the developer roller.