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106 records (took 0.023 seconds)

    Data collection
    64.
    发明授权
    Data collection 有权

    公开(公告)号：US11052691B2

    公开(公告)日：2021-07-06

    申请号：US16958849

    申请日：2018-01-08

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

    Inventor： Antonio Gracia Verdugo ,  Aleix Fort Filgueira ,  Andreu Vinets Alonso

    IPC: B41J2/045 ,  B41J29/393 ,  B41J2/21

    Abstract: Examples of the present disclosure relate to a calibration method for a printing system. The method comprises printing a diagnostic pattern representative of decap time. The diagnostic pattern comprises the firing of nozzles after an exposure to ambient air during a first predetermined time period to produce a first pattern element and the firing of nozzles after an exposure to ambient air during a second predetermined time period to produce a second pattern element. The method includes scanning the resulting diagnostic pattern with a sensor to collect decap data in a digital form, digitally analyzing the decap data, the digital analysis comprising identifying a quantitative difference between the first and second pattern elements, and modifying a servicing process of the printing system if the quantitative difference passes a predetermined threshold.

    SUBSTRATE COMPACTNESS DETECTION
    66.
    发明申请
    SUBSTRATE COMPACTNESS DETECTION 审中-公开

    公开(公告)号：US20200369048A1

    公开(公告)日：2020-11-26

    申请号：US16493007

    申请日：2018-01-30

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

    Inventor： Antonio Gracia Verdugo ,  Aleix Fort Filgueira ,  Carles Flotats Villagrasa

    IPC: B41J11/00 ,  B65H23/18

    Abstract: It is disclosed a substrate compactness detection method for a printer wherein the printer comprises a roller to receive a substrate roll and a media advance mechanism to receive a substrate from the substrate roll, the method comprising: determining a substrate thickness; advancing the substrate for a length; measuring an angular displacement of the roller caused by the advancing of the substrate; determining the substrate roll radius by using the length and the angular displacement; and calculating a compactness parameter in view of the substrate roll radius and the substrate thickness.

    Method of printing and printer
    67.
    发明授权
    Method of printing and printer 有权

    公开(公告)号：US10239327B2

    公开(公告)日：2019-03-26

    申请号：US15329956

    申请日：2014-07-31

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

    Inventor： Antonio Gracia Verdugo ,  Marina Cantero Lazaro ,  Mauricio Seras

    IPC: B41J2/21 ,  B41J2/045 ,  B41J2/15 ,  B41J2/155 ,  B41J2/505

    Abstract: A method of printing a pattern from at least two rows of fluid ejection nozzles, said nozzles ejecting a first fluid in a multi-pass printing mode, the method comprising: dividing the pattern to be printed between the rows of fluid ejection nozzles; applying masks to the rows of fluid ejection nozzles for printing with selected nozzles of each of the rows of fluid ejection nozzles during each pass; wherein a first mask for printing from a first row of fluid ejection nozzles during an n-th pass is different from a second mask for printing from a second row of fluid ejection nozzles during said n-th pass.

    Determining an amount of translucent printing fluid
    68.
    发明授权
    Determining an amount of translucent printing fluid 有权

    公开(公告)号：US10201981B2

    公开(公告)日：2019-02-12

    申请号：US15113490

    申请日：2014-01-24

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

    Inventor： Antonio Gracia Verdugo ,  David Toussaint ,  Oriol Borrell Avila

    IPC: B41J2/165 ,  B41J2/21 ,  B41J29/393

    Abstract: An example method for determining an amount of a translucent printing fluid in accordance with the present disclosure is provided. The example method comprises printing a plurality of test patterns with different proportions of colored and translucent printing fluids. The plurality of test patterns comprise a first area and a second area contiguous with the first area, wherein a color of the second area is different from a color of the first area. Migration characteristics of the plurality of test patterns are analyzed to determine an amount of translucent printing fluid to use for a successive printing operation.

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