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    DETECTING PRINTHEAD ISSUES
    22.
    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.

    3D print definition procedures
    23.
    发明授权
    3D print definition procedures 有权

    公开(公告)号：US11220061B2

    公开(公告)日：2022-01-11

    申请号：US16093702

    申请日：2016-05-12

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ,  Luis Garcia Garcia ,  Salvador Sanchez Ribes

    Inventor： Luis Garcia Garcia ,  Scott White ,  Salvador Sanchez Ribes

    IPC: B29C64/393 ,  B33Y30/00 ,  B29C64/165 ,  B33Y10/00 ,  B33Y50/02 ,  G05B19/4099

    Abstract: There is disclosed a non-transitory machine readable storage medium encoded with instructions executable by a processor and comprising instructions to: receive object data corresponding to a three-dimensional object to be generated; define print data for each of a plurality of slices of the object to control a respective layer forming operation in which print agent is ejected on a layer of build material in a pattern corresponding to selective fusing of the build material, wherein the print data and the respective pattern is defined for each slice according to object a print definition procedure; and select the print definition procedure from a plurality of print definition procedures based on a user input. There is also disclosed a corresponding method and additive manufacturing apparatus.

    BUILD MATERIAL OR PRINTING AGENT SELECTION IN A 3D PRINTING SYSTEM
    24.
    发明申请
    BUILD MATERIAL OR PRINTING AGENT SELECTION IN A 3D PRINTING SYSTEM 有权

    公开(公告)号：US20210221053A1

    公开(公告)日：2021-07-22

    申请号：US16095851

    申请日：2016-07-12

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

    Inventor： Alejandro Manuel De Pena ,  Luis Garcia Garcia ,  Pol Fornos

    IPC: B29C64/165 ,  B33Y10/00 ,  B33Y30/00

    Abstract: A three-dimensional object is generated using a build material and a printing agent. A visible property of one of the build material and the printing agent is identified. The other of the build material and the printing agent is selected based at least on the other of the build material and the printing agent having a given visible property. A three-dimensional object is generated using the one of build material and the printing agent having the identified visible property and the other of the build material and the printing agent having the given visible property. The selecting is based at least on the identified visible property and the given visible property having a desired visible property relationship. An apparatus for building a three-dimensional object is also disclosed.

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