公开(公告)号：US20180321618A1

公开(公告)日：2018-11-08

申请号：US15773962

申请日：2016-01-27

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Guang Jin Li ,  Stanley J. Kozmiski ,  Seongsik Chang ,  Daniel Tanchangco ,  David Sabo ,  Thomas Anthony ,  Omer Gila

IPC: G03G15/10 ,  G03G15/08 ,  G03G15/02 ,  G03G13/10 ,  C08L75/04

CPC classification number: G03G15/10 ,  C08L75/04 ,  G03G13/10 ,  G03G15/0233 ,  G03G15/0818 ,  G03G2215/0861

Abstract: The present disclosure relates to a liquid electrophotographic ink developer unit. The unit comprises a developer roller, and a secondary roller that co-operates with the developer roller. The developer roller is formed of a material having a specific resistivity of less than 1×106 Ω·cm. The secondary roller is formed of a material having a specific resistivity of 1×104 to 1×109 Ω·cm.

公开(公告)号：US20200301316A1

公开(公告)日：2020-09-24

申请号：US16604340

申请日：2017-12-15

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： David Sabo ,  Blair A. Butler ,  Jeffrey Zampell ,  Avinoam Halpern ,  Sarah Ann Russell

IPC: G03G15/11

Abstract: A technique includes rotating a squeegee roller to regulate a film thickness of ink on a developer roller; and using the developer roller to transfer a portion of the ink from the developer roller to a photoconductive member. The technique includes creating, by an electrode, a potential bias with the developer roller to transfer the ink to the developer roller; and inhibiting flow streaks on the developer roller, where inhibiting the flow streaks includes restricting a flow of ink between the squeegee roller and the electrode.

公开(公告)号：US10514633B2

公开(公告)日：2019-12-24

申请号：US15773962

申请日：2016-01-27

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Guang Jin Li ,  Stanley J. Kozmiski ,  Seongsik Chang ,  Daniel Tanchangco ,  David Sabo ,  Thomas Anthony ,  Omer Gila

IPC: G03G15/10 ,  G03G15/08 ,  C08L75/04 ,  G03G13/10 ,  G03G15/02

Abstract: The present disclosure relates to a liquid electrophotographic ink developer unit. The unit comprises a developer roller, and a secondary roller that co-operates with the developer roller. The developer roller is formed of a material having a specific resistivity of less than 1×106 Ω·cm. The secondary roller is formed of a material having a specific resistivity of 1×104 to 1×109 Ω·cm.

公开(公告)号：US20180259882A1

公开(公告)日：2018-09-13

申请号：US15760306

申请日：2015-09-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： David Sabo ,  Eric G. Nelson

IPC: G03G15/10

CPC classification number: G03G15/104 ,  G03G13/10

Abstract: An example developer unit includes a developer roller. The developer unit also includes a set of electrodes proximate to the developer roller. The set of electrodes form a cavity. The developer unit includes an inlet to the cavity. The inlet is to receive printing fluid. The developer unit includes an insert in the inlet. The insert is to distribute the printing fluid evenly in the cavity.

公开(公告)号：US09304465B2

公开(公告)日：2016-04-05

申请号：US13901782

申请日：2013-05-24

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Matthew G. Lopez ,  David F. Chiu ,  David Sabo ,  John W. Godden ,  Christopher S. Tanner ,  Eric G. Nelson ,  Guang Jin Li ,  James Michael Pingel

IPC: G03G15/10 ,  G03G15/00

CPC classification number: G03G15/55 ,  G03G15/10 ,  G03G15/105

Abstract: In one example, a processor readable medium has instructions thereon that, when executed by a processor, cause a system to detect a change in electrical conduction of a liquid moving at an interface between two surfaces and determine a conductivity of the liquid based on the detected change in conduction.

Abstract translation: 在一个示例中，处理器可读介质在其上具有指令，当由处理器执行时，该指令使得系统检测在两个表面之间的界面处移动的液体的电传导变化，并且基于检测到的液体确定导电性 传导变化。

公开(公告)号：US20170293244A1

公开(公告)日：2017-10-12

申请号：US15514114

申请日：2014-09-30

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： David Sabo

IPC: G03G15/10

CPC classification number: G03G15/095 ,  G03G9/12 ,  G03G15/0896 ,  G03G15/10 ,  G03G2221/1657

Abstract: A binary ink developer assembly includes a plurality of rollers, gears, and end caps. The rollers are in contact with each other to form a nip. Each roller includes a plurality of bearings. The gears include gear teeth. A respective gear has an involute tooth profile and applies a gear force at a pressure angle corresponding to the involute tooth profile to rotate at least one roller. The end caps are coupled to the bearings. At least one slot arranged to form a slot angle substantially equal to the pressure angle and to receive a respective bearing to support a respective roller.

公开(公告)号：US20140348526A1

公开(公告)日：2014-11-27

申请号：US13901782

申请日：2013-05-24

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Matthew G. Lopez ,  David F. Chiu ,  David Sabo ,  John W. Godden ,  Christopher S. Tanner ,  Eric G. Nelson ,  Guang Jin Li ,  James Michael Pingel

IPC: G03G15/10 ,  G01R27/08 ,  G01R27/00

CPC classification number: G03G15/55 ,  G03G15/10 ,  G03G15/105

Abstract: In one example, a processor readable medium has instructions thereon that, when executed by a processor, cause a system to detect a change in electrical conduction of a liquid moving at an interface between two surfaces and determine a conductivity of the liquid based on the detected change in conduction.

Abstract translation: 在一个示例中，处理器可读介质在其上具有指令，当由处理器执行时，该指令使得系统检测在两个表面之间的界面处移动的液体的电传导变化，并且基于检测到的液体确定导电性 传导变化。

公开(公告)号：US11016420B2

公开(公告)日：2021-05-25

申请号：US16604340

申请日：2017-12-15

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： David Sabo ,  Blair A. Butler ,  Jeffrey Zampell ,  Avinoam Halpern ,  Sarah Ann Russell

IPC: G03G15/11

Abstract: A technique includes rotating a squeegee roller to regulate a film thickness of ink on a developer roller; and using the developer roller to transfer a portion of the ink from the developer roller to a photoconductive member. The technique includes creating, by an electrode, a potential bias with the developer roller to transfer the ink to the developer roller; and inhibiting flow streaks on the developer roller, where inhibiting the flow streaks includes restricting a flow of ink between the squeegee roller and the electrode.

公开(公告)号：US10663890B2

公开(公告)日：2020-05-26

申请号：US16674855

申请日：2019-11-05

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： David Sabo ,  Eric G. Nelson

IPC: G03G15/10 ,  G03G13/10

Abstract: An example developer unit includes a developer roller. The developer unit also includes a set of electrodes proximate to the developer roller. The set of electrodes form a cavity. The developer unit includes an inlet to the cavity. The inlet is to receive printing fluid. The developer unit includes an insert in the inlet. The insert is to distribute the printing fluid evenly in the cavity.

公开(公告)号：US10474067B2

公开(公告)日：2019-11-12

申请号：US15760306

申请日：2015-09-30

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： David Sabo ,  Eric G. Nelson

IPC: G03G15/10 ,  G03G13/10

Abstract: An example developer unit includes a developer roller. The developer unit also includes a set of electrodes proximate to the developer roller. The set of electrodes form a cavity. The developer unit includes an inlet to the cavity. The inlet is to receive printing fluid. The developer unit includes an insert in the inlet. The insert is to distribute the printing fluid evenly in the cavity.