公开(公告)号：CA2258070A1

公开(公告)日：1999-07-08

申请号：CA2258070

申请日：1999-01-07

Applicant: XEROX CORP

Inventor： OBRIEN JOHN F ,  HAYS DAN A ,  TABB CHARLES H ,  JACKSON MARK S

IPC: G03G15/02 ,  G03G15/01

Abstract: A Recharge-Expose-and-Develop Image on Image color electrophotographic printing system in which the photoreceptor is recharged between development of one color of toner image and the subsequent exposure for a second color latent image by first being sprayed with opposite sign ions to reduce the photoreceptor potential and then being charged with correct sign ions to recharge the photoreceptor to a desired potential.

公开(公告)号：DE69026218T2

公开(公告)日：1996-10-31

申请号：DE69026218

申请日：1990-12-10

Applicant: XEROX CORP

Inventor： HAYS DAN A

IPC: G03G15/01 ,  G03G15/06 ,  G03G15/08 ,  G03G15/09

Abstract: A scavengeless/non-interactive electrostatographic development system for use in highlight color imaging. To control the developability of lines and the degree of interaction between the toner (44) and receiver (10), the combination of an AC voltage (54) on a developer donor roll (42) with an AC voltage (50) between toner cloud forming wires (48) and donor roll (42) enables efficient detachment of toner (44) from the donor to form a toner cloud and position one end of the cloud in close proximity to the image receiver (10) for optimum development of lines and solid areas without scavenging a previously toned image.

公开(公告)号：DE69111903T2

公开(公告)日：1996-04-11

申请号：DE69111903

申请日：1991-05-21

Applicant: XEROX CORP

Inventor： HAYS DAN A

IPC: B41J2/385 ,  B41J2/41 ,  G03G15/05 ,  G03G15/34 ,  G03G17/00

Abstract: Direct electrostatic printing without the use of an apertured printhead structure is accomplished by supplying mechanical energy in an image-wise manner via AC fringe fields coupled to a toned donor member (22). The A.C. fringe fields are created using paired electrodes positioned behind the donor member where they can function properly, notwithstanding fluctuations in the ambient environment.

公开(公告)号：DE68913171D1

公开(公告)日：1994-03-24

申请号：DE68913171

申请日：1989-12-21

Applicant: XEROX CORP

Inventor： HAYS DAN A

IPC: G03G15/01 ,  G03G15/09

Abstract: An electrostatic charge pattern is formed on a charge retentive surface (10). The charge pattern comprises charged image areas and discharged background areas. The fully charged image areas are at a voltage level of approximately -500 volts and the background is at a voltage level of approximately -100 volts. A spatial portion of the image area is used to form a first image with a narrow development zone while other spatial portions are used to form other images which are distinct from the first image in some physical property such as color or magnetic state. The development is rapidly turned on and off by a combination of AC and DC electrical switching (26, 49, 50, 51, 52). Thus, high spatial resolution multi-color development in the process direction can be obtained in a single pass of the charge retentive surface through the processing stations of a copying or printing apparatus. Also, since the voltages representing all images are at the same voltage polarity unipolar toner can be employed. In order to effect development of all images with a unipolar toner, each of the development system structures (32, 34) is capable of selective actuation without physical movement.

公开(公告)号：CA2028702A1

公开(公告)日：1991-06-12

申请号：CA2028702

申请日：1990-10-29

Applicant: XEROX CORP

Inventor： HAYS DAN A

IPC: G03G15/01 ,  G03G15/06 ,  G03G15/08 ,  G03G15/16

Abstract: A scavengeless/non-interactive electrostatographic development system for use in highlight color imaging. To control the developability of lines and the degree of interaction between the toner (44) and receiver (10), the combination of an AC voltage (54) on a developer donor roll (42) with an AC voltage (50) between toner cloud forming wires (48) and donor roll (42) enables efficient detachment of toner (44) from the donor to form a toner cloud and position one end of the cloud in close proximity to the image receiver (10) for optimum development of lines and solid areas without scavenging a previously toned image.

公开(公告)号：CA1186012A

公开(公告)日：1985-04-23

申请号：CA403197

申请日：1982-05-18

Applicant: XEROX CORP

Inventor： HAYS DAN A ,  WAYMAN WILLIAM H

IPC: G03G15/00 ,  G03G15/06 ,  G03G15/08 ,  G03G15/09 ,  G03G13/02 ,  G03G15/02

Abstract: This invention is directed to a unique development system, apparatus and process for charging insulating toner particles, the apparatus comprising in operative relationship a means for charging insulating toner particles and a means for transporting insulating toner particles, said means for charging, and said means for transporting biased to a predetermined potential; and the process in one embodiment comprising (1) providing a means for charging insulating toner particles, which means contains thereon a triboelectrically active coating, (2) providing a means for transporting toner particles, (3) depositing weakly charged toner particles on the transporting means and (4) contacting the weakly charged toner particles with the triboelectrically active coating in a charging zone situated between the means for charging and the means for transporting, whereat the charges on the toner particles are amplified to a positive or negative polarity. In one specific embodiment, the present invention is directed to an apparatus for simultaneously metering and charging non-magnetic insulating toner particles, which comprises in operative relationship a metering/charging roll means containing thereon a triboelectrically active coating, a transporting means, a drive roll means, an idler roll means, said transporting means forming a path of movement around said drive roll means and said idler roll means, a toner supply reservoir means, containing therein weakly charged insulating toner particles possessing about an equal number of positive and negative charges thereon, a voltage source means for the metering/charging roll means, a voltage source means for the drive roll means, and the transporting means, a tensioning means, and an imaging member means said metering/charging roll means moving in a direction opposite to the direction of movement of the transport means. The apparatus and process of the present invention are useful, for example, in electrostatographic imaging devices comprised of a charging means, an imaging means, a development means, a fixing means, and a fusing means, the improvement residing in the development means which is comprised of an apparatus for charging toner particles comprised in operative relationship of a means for charging insulating toner particles, and a means fortransporting insulating toner particles, said means for charging, and said means for transporting, biased to a predetermined potential.

公开(公告)号：CA1171269A

公开(公告)日：1984-07-24

申请号：CA393632

申请日：1982-01-06

Applicant: XEROX CORP

Inventor： HAYS DAN A

IPC: G03G15/08 ,  G03G15/09

Abstract: An apparatus in which a belt transports developer material into contact with a rigid member in a development zone to develop a latent image recorded thereon. The belt is maintained at a pre-selected tension. In this way, the developer material is compressed and spaces the belt from the rigid member.

公开(公告)号：CA1169716A

公开(公告)日：1984-06-26

申请号：CA377464

申请日：1981-05-13

Applicant: XEROX CORP

Inventor： HAYS DAN A

IPC: G03G15/09 ,  G03G13/08 ,  G03G15/08

Abstract: This invention is directed to a process and apparatus for causing the development of electrostatic latent images, the process residing in the provision of a development zone, encompassed by a flexible imaging member moving at a speed of from about 5 cm/sec to about 50 cm/sec, and a transporting member moving at a speed of from about 6 cm/sec to about 100 cm/sec, the flexible imaging member and transporting member having a distance therebetween of from about 0.05 millimeters to about 1.5 millimeters, the movement of said members causing a shearing action in said development zone, (2) adding an insulating developer composition to the development zone, the developer composition being comprised of insulating toner particles and insulating magnetic carrier particles, (3) introducing a high electric field in the development zone, (4) the insulating toner particles being caused to migrate from one layer of carrier particles to another layer of carrier particles contained in the development zone as a result of said shearing action, and said high electric field, the carrier particles rotating inone direction, then subsequently in an opposite direction, wherein said carrier particles are continuously made available immediately adjacent to the flexible imaging member.

公开(公告)号：CA1140806A

公开(公告)日：1983-02-08

申请号：CA368184

申请日：1981-01-09

Applicant: XEROX CORP

Inventor： KOPKO JOHN J ,  HAYS DAN A

IPC: G03G15/09 ,  G03G15/00 ,  G03G15/08 ,  G03G21/00

Abstract: An apparatus which develops a latent image recorded on a flexible member. Developer material is transported into contact with the flexible member in the development zone so as to develop the latent image. The flexible member is maintained at a pre-selected tension. As the developer material contacts the flexible member in the development zone, the flexible member deforms so as to conform, at least partially, to the developer material.

公开(公告)号：JP2000108400A

公开(公告)日：2000-04-18

申请号：JP26933499

申请日：1999-09-22

Applicant: XEROX CORP

Inventor： PEETERS ERIC ,  NOOLANDI JAAN ,  APTE RAJ B ,  FLOYD PHILIP D ,  SMALL JONATHAN A ,  KOVACS GREGORY J ,  LEAN MENG H ,  VOLKEL ARMIN R ,  BOLTE STEVEN B ,  SHI AN-CHANG ,  ENDICOTT FREDERICK J ,  ANDERSON GREGORY B ,  HAYS DAN A ,  KUBBY JOEL A ,  JACKSON WARREN B ,  KAREN A MOFFAT ,  MCANENEY BRIAN T ,  VEREGIN RICHARD P N ,  MCDOUGALL MARIA N V ,  BOILS DANIELLE C ,  PAUL D SZABO ,  ANDREW A BERLIN ,  G A NAVIL CONELL

IPC: B41J2/385 ,  B41J2/01 ,  B41J2/14 ,  B41J2/21

Abstract: PROBLEM TO BE SOLVED: To provide a print head capable of high quality and high speed print ing. SOLUTION: There is disclosed a print head 34 used in a printer. In the print head 34, a propelling medium flows in a fluid passage toward a printing medium 38 and a printing material such as ink or toner is controlled to be introduced into the propelling medium flow such that sufficient energy for moving to the printing medium 38 is supplied to the them. A plurality of fluid passages for directing the propelling medium flow and printing material enable high quality and high resolution printing. The plurality of printing materials are introduced into the passage to be mixed in the fluid passage before printing on the printing medium 38. The printing materials are mixed and superposed on the printing medium 38 without executing aligning of a registor. One embodiment of a full-color printer having a single fluid passage is disclosed.