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    PRINT SUBSTRATE PRE-TREATMENT
    1.
    发明申请
    PRINT SUBSTRATE PRE-TREATMENT 审中-公开

    公开(公告)号：WO2018194549A1

    公开(公告)日：2018-10-25

    申请号：PCT/US2017/027951

    申请日：2017-04-17

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

    Inventor： BLANCH PINOL, Marta ,  CRESPI, Cristina ,  KORNGIEBEL, Jennifer

    IPC: B41J2/145 ,  C09D11/10

    Abstract: A method, in a printing system comprising a carriage that includes a first print head for depositing a first print fluid on a substrate and a second print head for depositing a second print fluid on the substrate, in which the method comprises using the second print head, pre-treating the substrate to obstruct print fluid migration into a porous structure of the substrate by depositing a post-print-treatment fluid over at least a portion of the substrate prior to deposition of the first print fluid on the substrate.

    METHOD AND APPARATUS FOR DIGITAL PRINTING
    2.
    发明申请
    METHOD AND APPARATUS FOR DIGITAL PRINTING 审中-公开

    公开(公告)号：WO2020263251A1

    公开(公告)日：2020-12-30

    申请号：PCT/US2019/039311

    申请日：2019-06-26

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

    Inventor： AMELA CONESA, Eduardo ,  CANTO ESTANY, Diana ,  BLANCH PINOL, Marta

    IPC: B41J2/21 ,  H04N1/60

    Abstract: A method of digital printing is disclosed in which a digital image to be printed has at least one region having pixels comprising superpositioned layers of a first ink and a second ink. The method includes producing at least one sample print and calibrating misalignment of the superpositioned layers at a plurality of calibration locations on the sample print. The resultant misalignment data is provided to a morphing program to pre-deform the digital image to provide a modified digital image which compensates for misalignment during printing. The image is then printed using the the modified digital image. An apparatus and a machinereadable storage medium comprising instructions executable by a processor are also disclosed.

    IMAGE RENDERING
    4.
    发明申请
    IMAGE RENDERING 审中-公开

    公开(公告)号：WO2019199267A1

    公开(公告)日：2019-10-17

    申请号：PCT/US2018/026715

    申请日：2018-04-09

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

    Inventor： BLANCH PINOL, Marta ,  CRESPI ARGEMI, Cristina ,  ECHEVARRIA BENITO, Sara

    IPC: H04N1/56

    Abstract: There is provided a method for rendering an image according to selected image quality attributes. Two or more image quality attributes are selected from a plurality of attributes of the image. A set of pigments for an area of the image and a density for each pixel of the area are determined. A quantity of pretreatment for deposition onto a print target is determined, where the pretreatment quantity is dependent on the pigments, the density, and the selected image quality attributes.

    DROPS BASED ON MEDIA TEMPERATURE
    6.
    发明申请
    DROPS BASED ON MEDIA TEMPERATURE 审中-公开

    公开(公告)号：WO2018203897A1

    公开(公告)日：2018-11-08

    申请号：PCT/US2017/030879

    申请日：2017-05-03

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

    Inventor： BLANCH PINOL, Marta ,  CANTO ESTANY, Diana ,  AMELA CONESA, Eduardo

    IPC: B41J2/04 ,  B41J2/21

    Abstract: In an example, a print system identifies a number of drops to eject corresponding to an expected variation in print fluid based on media temperature and generate print instructions to operate a fluid eject device to that effect. In another example, a print system includes a temperature engine to identify a temperature, a compensator engine to identify a number of drops of print fluid based on the media temperature, and a control engine to generate print instructions to operate a fluid ejection device to place the number of drops of print fluid on media.

    NOZZLE HEALTH
    8.
    发明申请
    NOZZLE HEALTH 审中-公开

    公开(公告)号：WO2021257087A1

    公开(公告)日：2021-12-23

    申请号：PCT/US2020/038653

    申请日：2020-06-19

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

    Inventor： AMELA CONESA, Eduardo ,  BLANCH PINOL, Marta ,  CANTO ESTANY, Diana

    IPC: B41J2/05 ,  B41J2/165 ,  B41J29/393

    Abstract: In one example a method comprising causing, by a processor, a nozzle of a printhead to discharge a printing fluid droplet toward a drop detector receiving, from the drop detector, by a processor, a signal indicative of the printing fluid droplet reaching a drop detection zone, and determining, by a processor, a flight time for the nozzle. The flight time is the time taken for the printing fluid droplet to reach the drop detection zone. The example method comprises comparing, by a processor, the flight time to a predetermined time for the printing fluid and determining, by a processor, a health parameter of the nozzle based on the comparison.

    PRE-TREATMENTS FOR INK-JET PRINTING
    9.
    发明申请
    PRE-TREATMENTS FOR INK-JET PRINTING 审中-公开

    公开(公告)号：WO2021061088A1

    公开(公告)日：2021-04-01

    申请号：PCT/US2019/052431

    申请日：2019-09-23

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

    Inventor： ECHEVARRIA BENITO, Sara ,  BLANCH PINOL, Marta ,  CRESPI ARGEMI, Cristina

    IPC: B41J2/14 ,  B41J2/145 ,  B41J29/38

    Abstract: Disclosed herein is a print head arrangement, a printing device and a method of operating a printing device. The print head arrangement comprises a main print head having a plurality of printing nozzles for ejecting a printing fluid and an auxiliary print head having a plurality of pre-treatment nozzles for ejecting a pre-treatment fluid. The print head arrangement further comprises a controller that is to obtain a print medium parameter and to select a subset of the plurality of pre-treatment nozzles for application of the pre-treatment fluid based on the print medium parameter. The print medium parameter characterizes a thermal inertia of the print medium.

    PRINTING APPARATUS AND PRINT MASK GENERATION
    10.
    发明申请
    PRINTING APPARATUS AND PRINT MASK GENERATION 审中-公开
    印刷设备和打印蒙版生成

    公开(公告)号：WO2018080467A1

    公开(公告)日：2018-05-03

    申请号：PCT/US2016/058779

    申请日：2016-10-26

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

    Inventor： BLANCH PINOL, Marta ,  AMELA, Eduardo ,  CANTO ESTANY, Diana

    IPC: G06F3/12 ,  B41J29/38 ,  B41J2/005

    CPC classification number: B41J29/38 ,  B41J2/2132 ,  B41J19/142

    Abstract: A printing apparatus comprises a print head to print an image by scanning the print head across a print medium in a first direction and in a second direction, the second direction being opposite to the first direction. The print head includes an array of nozzles, the array comprising a first group of nozzles and a second group of nozzles which are arranged along the length of the array of nozzles. A controller controls the print head to eject print agent from a first number of nozzles of the first group of nozzles when scanning the print head in the first direction and from a first number of nozzles of the second group of nozzles when scanning the print head in the second direction; and further to eject print agent from a second number of nozzles of the first group of nozzles when scanning the print head in the second direction wherein the second number of nozzles is greater than one and less than the first number of nozzles of the first group of nozzles.

    Abstract translation: 打印设备包括打印头，用于通过沿第一方向和第二方向在打印介质上扫描打印头来打印图像，第二方向与第一方向相反。 打印头包括喷嘴阵列，该阵列包括沿着喷嘴阵列的长度布置的第一组喷嘴和第二组喷嘴。 控制器控制打印头当在第一方向上扫描打印头时从第一组喷嘴中的第一数量的喷嘴中喷射打印剂，并且当在第一组喷嘴中扫描打印头时从第二组喷嘴中的第一数量的喷嘴中喷射打印剂 第二方向; 并且当在所述第二方向上扫描所述打印头时，进一步从所述第一组喷嘴的第二数量的喷嘴喷射打印剂，其中所述第二数量的喷嘴大于所述第一组喷嘴中的所述第一数量的喷嘴并且小于所述第一组 喷嘴。

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