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    MATERIAL DISPENSING APPARATUS
    1.
    发明申请
    MATERIAL DISPENSING APPARATUS 有权

    公开(公告)号：US20210245439A1

    公开(公告)日：2021-08-12

    申请号：US17049589

    申请日：2018-10-16

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

    Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Vicente Granados Asensio

    IPC: B29C64/336 ,  B29C64/165 ,  B29C64/205 ,  B29C64/329

    Abstract: In one example, a material dispensing apparatus comprises a plurality of material containers, wherein the plurality of material containers comprises a first set of material containers arranged to contain a first material and a second set of material containers arranged to contain a second, different, material, and each material container of the second set is located relative to a respective material container of the first set to form a pair of materiel containers. In use, the material dispensing apparatus is controllable to move across a build platform of an additive manufacturing system. Each of the plurality of material containers comprises an outlet mechanism that is independently controllable, relative to outlet mechanisms of others of the plurality of material containers, such that each pair of material containers selectively dispenses at least a portion of a respective amount of material onto a respective portion of the build platform as the material dispensing apparatus moves across the build platform, such that, collectively, the plurality of material containers forms a complete layer of material on the build platform as the material dispensing apparatus performs a single pass across the build platform.

    SEALING ASSEMBLIES
    2.
    发明申请
    SEALING ASSEMBLIES 有权

    公开(公告)号：US20210347121A1

    公开(公告)日：2021-11-11

    申请号：US15734572

    申请日：2019-01-29

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

    Inventor： Rhys Owen Mansell ,  Mohammad Jowkar ,  Francesc Tarrida Tirado

    IPC: B29C64/25 ,  B29C64/165 ,  B33Y30/00 ,  B29C64/364

    Abstract: Example implementations relate to one or more than one sealing assembly to seal an aperture, coupling two chambers, the aperture being arranged to accommodate a printhead carriage; the assembly comprising: at least a pair of curtains capable of being disposed in a sealing relationship with the aperture; the at least a pair of curtains being capable of being positioned one either side of the printhead carriage, and spooling and unspooling mechanisms comprising a pair of spools onto which the pair of curtains can be spooled and unspooled in response to movement of the printhead carriage to maintain the sealing relationship with the aperture.

    Colored object generation
    4.
    发明授权
    Colored object generation 有权

    公开(公告)号：US11945168B2

    公开(公告)日：2024-04-02

    申请号：US17309925

    申请日：2019-04-30

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

    Inventor： Mohammad Jowkar ,  Rhys Mansell ,  Carmen Blasco Cortes

    IPC: B29C64/393 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

    CPC classification number: B29C64/393 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

    Abstract: In an example, a method includes obtaining object model data describing at least a portion of an object to be generated by additive manufacturing. A color value of a first portion of the object to be generated may be determined, wherein the color value is based on a first color and a second color, different from the first color. Object generation data to generate the object using a fusing agent of the first color and a build material having the second color may be determined by defining a first region of a layer of build material to which fusing agent is to be applied defining a second region of the build material to which detailing agent is to be applied to define an edge of the object and defining a spacing region of build material to separate the first region and second region, wherein the spacing region is defined using parameters selected to provide the color value.

    SELECTIVELY DEPOSITING MATERIAL
    5.
    发明申请
    SELECTIVELY DEPOSITING MATERIAL 有权

    公开(公告)号：US20210229180A1

    公开(公告)日：2021-07-29

    申请号：US17050614

    申请日：2018-10-16

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

    Inventor： Mohammad Jowkar ,  Rhys Mansell ,  Vicente Granados Asensio

    IPC: B22F10/14 ,  B22F12/53 ,  B22F12/30 ,  B33Y30/00 ,  B22F1/00 ,  B33Y50/02 ,  B22F12/55 ,  B22F12/00 ,  B33Y10/00 ,  B22F10/85

    Abstract: In an example, a method comprises controlling material dispensing by a material dispensing apparatus to output a layer of material onto a build platform. The material dispensing apparatus comprises a plurality of pairs of material containers, each pair of material containers movable along a path across the build platform, and comprising a first material container to dispense a first material and a second material container to dispense a second material, to output a band of material along the path, each pair of material containers being arranged with respect to each other pair of material containers to move along respective paths across the build platform to output respective bands of material forming a complete layer of material on the build platform. The controlling comprises controlling each pair of material containers to move along its respective path and deposit, selectively, first material, along one or more regions of the respective band along the respective path that coincide with a portion of a part to be printed, and deposit, selectively, second material, along other regions of the respective band along the respective path.

    DETECTING PRINTHEAD ISSUES
    6.
    发明公开
    DETECTING PRINTHEAD ISSUES 审中-公开

    公开(公告)号：US20230256734A1

    公开(公告)日：2023-08-17

    申请号：US18012041

    申请日：2020-07-08

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

    Inventor： Mohammad Jowkar ,  Luis Garcia Garcia ,  Rhys Mansell

    IPC: B41J2/045

    CPC classification number: B41J2/04558 ,  B41J2/04586

    Abstract: According to one aspect, there is provided a method of detecting printhead issues in a printer. The method comprises obtaining an image to be printed, generating a first sub-pattern and a second sub-pattern, wherein the first sub-pattern in a pattern to be printed in a first pass comprising a pattern suitable to enable the detection of a printhead issue and wherein the second sub-pattern is the complementary pattern that completes the first sub-pattern such that printing the first and second sub-patterns is equivalent to printing the obtained image, printing the first sub-pattern on a print target, obtaining an image of the printed first sub-pattern, analysing the image of the printed first sub-pattern to determine the presence of a printhead issue and, where appropriate, performing a printhead maintenance operation, and printing the second sub-pattern on the print target.

    FILTER CLEANING
    7.
    发明申请
    FILTER CLEANING 有权

    公开(公告)号：US20220379256A1

    公开(公告)日：2022-12-01

    申请号：US17762678

    申请日：2020-01-29

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

    Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Ahmed Elibiary

    IPC: B01D46/71 ,  B29C64/35

    Abstract: According to one example, there is provided a method of cleaning a filter in a filter housing. The filter has a dirty side at which a dirty airflow is received, and a clean side through which a cleaned airflow flows. The method comprises generating a cleaning airflow at the dirty side of the filter, the cleaning airflow having a predetermined volume and pressure, and generating an extraction airflow to extract from the filter housing the same volume and pressure of air from the filter housing as that generated in the filter housing by the cleaning airflow.

    BUILD MATERIAL CLEANING
    9.
    发明申请
    BUILD MATERIAL CLEANING 有权

    公开(公告)号：US20220134667A1

    公开(公告)日：2022-05-05

    申请号：US17416383

    申请日：2019-07-15

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

    Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Emiliano Tolosa Gonzalez

    IPC: B29C64/35 ,  B22F10/68 ,  B28B1/00 ,  B33Y30/00 ,  B33Y40/20

    Abstract: An example of a self-cleaning apparatus for a 3D system is disclosed. The apparatus comprises a surface on which build material accumulates during a 3D printing operation. The surface has a profile that slopes generally down towards a collection point. The apparatus also comprises the collection point located in the surface to drain build material from the surface. The apparatus further comprises a vibrating source to cause the surface to vibrate. The apparatus also comprises a controller to control the vibrating source to vibrate, upon determining that a cleaning operation is to be performed, to drive build material accumulated on the surface towards the collection point.

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