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    NON-UNIFORM ELECTRIC FIELDS TO COMPACT METAL POWDER BUILD MATERIAL
    1.
    发明公开
    NON-UNIFORM ELECTRIC FIELDS TO COMPACT METAL POWDER BUILD MATERIAL 审中-公开

    公开(公告)号：US20230321730A1

    公开(公告)日：2023-10-12

    申请号：US18022093

    申请日：2020-08-18

    Applicant: Hewlett-Packard Development Company, L.P

    Inventor： Seongsik Chang

    IPC: B22F12/60 ,  B22F12/49 ,  B22F12/90

    CPC classification number: B22F12/60 ,  B22F12/49 ,  B22F12/90 ,  B22F2202/06

    Abstract: In one example in accordance with the present disclosure, an additive manufacturing system is described. The additive manufacturing system includes a build material distributor to deposit metal powder build material on abed. The additive manufacturing system also includes at least a first electrode below the bed and a second electrode above the bed to generate a non-uniform electric field to compact deposited the metal powder build material. A hardening system of the additive manufacturing system selectively hardens metal powder build material in a pattern of a layer of a three-dimensional object to be printed.

    ADDITIVE MANUFACTURING OF METALS
    3.
    发明申请
    ADDITIVE MANUFACTURING OF METALS 有权

    公开(公告)号：US20210402474A1

    公开(公告)日：2021-12-30

    申请号：US16605688

    申请日：2018-04-30

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

    Inventor： Seongsik Chang ,  Krzysztof Nauka

    IPC: B22F10/28 ,  B33Y10/00 ,  B33Y30/00 ,  B22F12/90 ,  B22F10/85 ,  B33Y50/02

    Abstract: An example method for additive manufacturing of metals includes spreading a build material including a metal in a sequence of layers. Each layer has a respective thickness, a respective sequence position, and a respective exposed surface to receive radiated energy from a flood energy source prior to spreading of a subsequent layer. A energy function is determined based on the metal, the thickness, and the sequence position of an exposed layer. The energy function defines the radiated energy and includes an intensity profile and a fluence sufficient to cause a consolidating transformation of the build material in the exposed layer. The exposed surface of the exposed layer is exposed to the radiated energy from the flood energy source, causing the consolidating transformation of the build material in the exposed layer.

    BINARY INK DEVELOPER (BID) ASSEMBLY FOR LIQUID ELECTROPHOTOGRAPHY (LEP) PRINTING DEVICE
    5.
    发明申请
    BINARY INK DEVELOPER (BID) ASSEMBLY FOR LIQUID ELECTROPHOTOGRAPHY (LEP) PRINTING DEVICE 审中-公开

    公开(公告)号：US20200041933A1

    公开(公告)日：2020-02-06

    申请号：US16598120

    申请日：2019-10-10

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

    Inventor： Seongsik Chang

    IPC: G03G15/10 ,  G03G15/11 ,  C09D11/02 ,  G03G9/00

    Abstract: A binary ink developer (BID) assembly for a liquid electrophotography (LEP) printing device can include a developer roller having an electrically insulating exterior coating that receives ink from an ink supply and transfers the received ink to a photoconductive imaging cylinder in accordance with an electrostatic image on the imaging cylinder. A charge-specified boundary condition can exist at the boundary between the exterior coating and the ink. Electrically conductive ink may not be transferred to the imaging cylinder at background portions of the electrostatic image.

    OPTICAL SENSOR SYSTEMS HAVING SENSOR AND DETECTION MODULES
    7.
    发明申请
    OPTICAL SENSOR SYSTEMS HAVING SENSOR AND DETECTION MODULES 有权

    公开(公告)号：US20170205339A1

    公开(公告)日：2017-07-20

    申请号：US15476278

    申请日：2017-03-31

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

    Inventor： Seongsik Chang ,  Henryk Birecki ,  Krzysztof Nauka

    IPC: G01N21/35 ,  G01N21/15

    CPC classification number: G01N21/35 ,  G01N21/15 ,  G01N21/3504 ,  G01N2021/151 ,  G01N2021/3513

    Abstract: In some examples, an image sensor system comprises a source module including a source housing having a source window and a source shielding member, the source module to emit a detection signal through the source window. the source shielding member surrounding the source window and extending in an outward direction from the source window. The image sensor system further comprises a detection module including a detection housing having a detection window and a detection shielding member, the detection module spaced apart from the source module and to detect the detection signal emitted from the source module and passed through the detection window, the detection shielding member surrounding the detection window and extending in an outward direction from the detection window.

    METAL POWDER COMPACTORS
    10.
    发明申请
    METAL POWDER COMPACTORS 有权

    公开(公告)号：US20210354202A1

    公开(公告)日：2021-11-18

    申请号：US16606260

    申请日：2018-06-08

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

    Inventor： Thomas Anthony ,  Seongsik Chang

    IPC: B22F10/50 ,  B22F12/00 ,  B33Y10/00 ,  B33Y40/00 ,  B33Y30/00

    Abstract: A system for compacting layers of metal powder, including: a layer of metal powder at a first voltage; and a conductive object above the layer of metal powder, the conductive object at a second voltage, wherein a voltage differential between the layer of metal powder and the conductive object is sufficient to attract particles from the layer of metal powder to the conductive object, change the voltage on the particles, and redeposit the particles in the layer of metal powder.

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