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：US20230094249A1

公开(公告)日：2023-03-30

申请号：US17911213

申请日：2020-04-08

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

Inventor： Jeffrey Zampell ,  John W. Godden

IPC: G03G15/08 ,  G03G15/10

Abstract: In one example in accordance with the present disclosure, a developer unit seal is described. The developer unit seal includes an endcap. The endcap has an opening to receive a dynamic seal for a roller, an inlet to receive print fluid, and a channel embedded in a surface of the endcap. The channel connects the inlet with the opening to direct print fluid to the opening. The developer unit seal also includes a sealing member to cover the channel.

公开(公告)号：US11934114B2

公开(公告)日：2024-03-19

申请号：US17633627

申请日：2019-10-08

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

Inventor： Jeffrey Zampell ,  John W. Godden

IPC: G03G15/08

CPC classification number: G03G15/0898

Abstract: In one example in accordance with the present disclosure, a developer unit seal is described. The seal includes a first sealing member to contact an end cap of the developer unit. The first sealing member has ports to align with rollers that are to protrude into the end cap. The seal includes a second sealing member to contact the first sealing member. The second sealing member has ports to align with the rollers. Channels are disposed between the first sealing member and the second sealing member to direct print fluid to each of the ports.

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：US12204260B2

公开(公告)日：2025-01-21

申请号：US18249088

申请日：2020-10-16

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

Inventor： Jeffrey Zampell ,  Daniel C. Tanchangco ,  Jingzhi Lu

IPC: G03G15/10 ,  G03G15/08 ,  G03G15/11

Abstract: A developer roller having a first section that includes a first exterior surface, wherein the first exterior surface includes an electrically-conductive material; and a second section includes a second exterior surface, wherein the second exterior surface is non-electrically-conductive. The second section is axially aligned with the first section and provided at a first longitudinal end of the first section.

公开(公告)号：US12038698B2

公开(公告)日：2024-07-16

申请号：US17911213

申请日：2020-04-08

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

Inventor： Jeffrey Zampell ,  John W. Godden

IPC: G03G15/10 ,  G03G15/08

CPC classification number: G03G15/0817 ,  G03G15/0898 ,  G03G15/104 ,  G03G2221/1657

Abstract: In one example in accordance with the present disclosure, a developer unit seal is described. The developer unit seal includes an endcap. The endcap has an opening to receive a dynamic seal for a roller, an inlet to receive print fluid, and a channel embedded in a surface of the endcap. The channel connects the inlet with the opening to direct print fluid to the opening. The developer unit seal also includes a sealing member to cover the channel.

公开(公告)号：US20220283527A1

公开(公告)日：2022-09-08

申请号：US17633627

申请日：2019-10-08

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

Inventor： Jeffrey Zampell ,  John W. Godden

IPC: G03G15/08

Abstract: In one example in accordance with the present disclosure, a developer unit seal is described. The seal includes a first sealing member to contact an end cap of the developer unit. The first sealing member has ports to align with rollers that are to protrude into the end cap. The seal includes a second sealing member to contact the first sealing member. The second sealing member has ports to align with the rollers. Channels are disposed between the first sealing member and the second sealing member to direct print fluid to each of the ports.