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    Decel correction in a printer
    1.
    发明授权
    Decel correction in a printer 有权

    公开(公告)号：US10744757B2

    公开(公告)日：2020-08-18

    申请号：US16327392

    申请日：2016-10-26

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

    Inventor： Antonio Gracia Verdugo ,  Pau Costal ,  David Toussaint

    IPC: B41J2/045 ,  B41J2/175 ,  B29C64/112 ,  B41J29/38 ,  B41J2/21

    Abstract: A printer includes a print head to print by ejecting drops of a printing fluid;, a memory to store a correction measure, the correction measure to modify printing a pattern to compensate for decel, and a processor. The processor analyzes print data for a pattern that, when printed using the print head, triggers decel, controls the print head to eject drops of the printing fluid in accordance with the print data, when the analysis indicates that the pattern to be printed triggers decel, applies the correction measure upon printing the pattern, and, when the analysis indicates that the pattern to be printed does not trigger decel, does not apply the correction measure upon printing the pattern.

    Testing for wiping pre-treatment of print media
    2.
    发明授权
    Testing for wiping pre-treatment of print media 有权

    公开(公告)号：US10518530B2

    公开(公告)日：2019-12-31

    申请号：US16098003

    申请日：2016-07-18

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

    Inventor： Antonio Gracia Verdugo ,  Mauricio Seras Franzoso ,  Pau Costal

    IPC: B41J2/12 ,  B41J2/045 ,  B41J2/125 ,  B41J11/00 ,  B41J29/38

    Abstract: There is disclosed a non-transitory machine-readable medium encoded with instructions executable by a processor and comprising instructions to: control print apparatus to print a test pattern 11 on a test region of a print medium 4; receive test data relating to the test pattern 11 printed on the print medium 4 from a sensor 8; analyse the test data with reference to baseline data to determine if the test pattern 11 satisfies a print quality criterion; output an instruction to operate the print apparatus in a first mode, in which a pre-printing treatment is not applied to the print medium, in response to determining that the test pattern 11 satisfies the print quality criterion, the pre-printing treatment comprising wiping a printing surface of the print medium with a wiper element 10, 20; and output an instruction to operate the print apparatus in a second mode, in which the pre-printing treatment is applied to the print medium 4, in response to determining that the test pattern 11 satisfies the print quality criterion.

    Wiper roll to cause friction on a print medium
    3.
    发明授权
    Wiper roll to cause friction on a print medium 有权

    公开(公告)号：US10442225B2

    公开(公告)日：2019-10-15

    申请号：US16097885

    申请日：2016-07-28

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

    Inventor： Pau Costal ,  Carles Flotats Villagrasa ,  Antonio Gracia Verdugo

    IPC: B41J29/17 ,  B41J11/00 ,  B41J15/04

    Abstract: A device (2) includes a media roll (4) to output a print medium (M) in a forward direction (26) and a wiper roll (6) to contact the surface of the print medium (M) at a rotation speed to cause friction on the print medium (M). The device (2) may determine a radius (r2) of the media roll (4) outputting the print medium (M) and, based on this radius (r2), adapt parameters such as the rotation speed of the wiper roll and a back tension (T2) exerted by the media roll (4) on the print medium (M) so as to control the friction caused by the wiper roll (6) on the print medium (M).

    TESTING FOR WIPING PRE-TREATMENT OF PRINT MEDIA
    5.
    发明申请
    TESTING FOR WIPING PRE-TREATMENT OF PRINT MEDIA 审中-公开

    公开(公告)号：US20190143679A1

    公开(公告)日：2019-05-16

    申请号：US16098003

    申请日：2016-07-18

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

    Inventor： Antonio Gracia Verdugo ,  Mauricio Seras Franzoso ,  Pau Costal

    IPC: B41J2/12 ,  B41J11/00 ,  B41J2/125 ,  B41J29/38

    Abstract: There is disclosed a non-transitory machine-readable medium encoded with instructions executable by a processor and comprising instructions to: control print apparatus to print a test pattern 11 on a test region of a print medium 4; receive test data relating to the test pattern 11 printed on the print medium 4 from a sensor 8; analyse the test data with reference to baseline data to determine if the test pattern 11 satisfies a print quality criterion; output an instruction to operate the print apparatus in a first mode, in which a pre-printing treatment is not applied to the print medium, in response to determining that the test pattern 11 satisfies the print quality criterion, the pre-printing treatment comprising wiping a printing surface of the print medium with a wiper element 10, 20; and output an instruction to operate the print apparatus in a second mode, in which the pre-printing treatment is applied to the print medium 4, in response to determining that the test pattern 11 satisfies the print quality criterion.

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