FAILING NOZZLE COMPENSATION AND NON-UNIFORMITY CORRECTION IN INKJET PRINTING

    公开(公告)号:US20220219463A1

    公开(公告)日:2022-07-14

    申请号:US17607535

    申请日:2020-05-27

    Applicant: SPGPrints B.V.

    Abstract: A method and system for detecting one or more failing nozzles in an inkjet printhead of an inkjet printer for printing an image on a substrate and compensating failing nozzles, as well as for correcting colour uniformity of a printed image in inkjet printing an image on a substrate includes printing a first test pattern on a dedicated substrate, which is optically scanned and includes a system for the same. From the scan failing nozzles are identified, which are to be compensated by other nozzles. To these compensating nozzles compensated nozzle control data are allocated, which are used in printing a second test pattern that is also scanned and analysed for local deviations of colorimetric greyscale value. Corrected nozzle control data are allocated to the nozzles associated with the local deviation.

    One-pot synthesis of reactive deep black
    2.
    发明授权

    公开(公告)号:US10669425B2

    公开(公告)日:2020-06-02

    申请号:US16604202

    申请日:2018-05-01

    Applicant: SPGPrints B.V.

    Abstract: A one-pot synthesis for preparing an aqueous reactive black mixture includes a) dissolving 2-[(4-aminophenyl)sulfonyl]ethanesulfonic acid (vinyl sulphone parabase ester) in water; b) diazotizing the dissolved vinyl sulphone parabase ester using excess nitrous acid or using excess nitrite and an acid, resulting in a diazonium salt and remaining nitrous acid; c) quenching the remaining nitrous acid with sulfamic acid; d) coupling the diazonium salt of step c) with 4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid (H-acid) until the reaction is complete, resulting in Reactive Black 5 (RB 5) and remaining diazonium salt, e) coupling the remaining diazonium salt with 7-acetamido-4-hydroxy-2-naphthalenesulfonic acid (acetyl-J-acid) until the reaction is complete resulting in Reactive Orange 78 (RO 78); and f) obtaining the aqueous reactive black mixture.

    CONTROL OF PRINTING OPERATION OF PRINTING HEADS IN A DIGITAL PRINTING APPARATUS

    公开(公告)号:US20190105923A1

    公开(公告)日:2019-04-11

    申请号:US16087880

    申请日:2017-03-20

    Applicant: SPGPrints B.V.

    Abstract: A digital printing apparatus for inkjet printing on a sheet or web of material includes a belt for supporting and conveying the sheet or web of material fixed to the belt. The belt is guided along at least a first roller driven by a motor and a second roller driven by the belt. A plurality of printing heads is arranged along the path of the belt. A control system is configured to control the operation of the motor and the printing operation of the printing heads. A first encoder, being configured to supply a first encoder signal to the control system for controlling the operation of the motor, is associated with the first roller. A second encoder, being configured to supply a second encoder signal to the control system for controlling the printing operation of each printing head, is associated with the second roller.

    Printing System Having Individually Movable Sub-Detector Elements for Print Head Protection

    公开(公告)号:US20180257370A1

    公开(公告)日:2018-09-13

    申请号:US15456995

    申请日:2017-03-13

    Applicant: SPGPrints B.V.

    CPC classification number: B41J29/02 B41J2/1752 B41J2/17536

    Abstract: A printing system includes a print module with printheads covering a printing width in x-direction, and a substrate holder for supporting a substrate. The substrate and print module are movable relative to each other in y-direction. Each printhead is positioned spaced at a first distance from the substrate holder in z-direction. A detection mechanism is provided for detecting obstructions on the substrate holder. A control unit is provided for stopping further relative movement in the y-direction between the substrate and the print module when an obstruction has been detected. The detection mechanism includes individually movable sub-detection elements that together cover the printing width, where those elements are designed to have a detection signal send out to the control unit when one of the elements gets moved out of a starting position by an obstruction trying to pass it.

    SCREEN PRINTING, IN PARTICULAR ROTARY SCREEN PRINTING OF TEXTILE MATERIALS

    公开(公告)号:US20220234377A1

    公开(公告)日:2022-07-28

    申请号:US17611958

    申请日:2020-11-27

    Applicant: SPGPrints B.V.

    Inventor: Albrecht Gebhard

    Abstract: A method of screen printing an image on a substrate, such as rotary screen printing, includes using a printing screen having a surface structure at its printing side and attached imaged lacquer layer having open areas defining the image to be printed, where the image includes pixel based design elements, the printing screen has a parallelogram pattern, preferably an orthogonal pattern, of screen openings and the open areas of the imaged lacquer layer representing the pixel based design elements are arranged in an orthogonal raster.

    Printing system having individually movable sub-detector elements for print head protection

    公开(公告)号:US10137680B2

    公开(公告)日:2018-11-27

    申请号:US15456995

    申请日:2017-03-13

    Applicant: SPGPrints B.V.

    Abstract: A printing system includes a print module with printheads covering a printing width in x-direction, and a substrate holder for supporting a substrate. The substrate and print module are movable relative to each other in y-direction. Each printhead is positioned spaced at a first distance from the substrate holder in z-direction. A detection mechanism is provided for detecting obstructions on the substrate holder. A control unit is provided for stopping further relative movement in the y-direction between the substrate and the print module when an obstruction has been detected. The detection mechanism includes individually movable sub-detection elements that together cover the printing width, where those elements are designed to have a detection signal send out to the control unit when one of the elements gets moved out of a starting position by an obstruction trying to pass it.

    Screen printing, in particular rotary screen printing of textile materials

    公开(公告)号:US11912050B2

    公开(公告)日:2024-02-27

    申请号:US17611958

    申请日:2020-11-27

    Applicant: SPGPrints B.V.

    Inventor: Albrecht Gebhard

    CPC classification number: B41M1/12 B41N1/247 B41N1/248

    Abstract: A method of screen printing an image on a substrate, such as rotary screen printing, includes using a printing screen having a surface structure at its printing side and attached imaged lacquer layer having open areas defining the image to be printed, where the image includes pixel based design elements, the printing screen has a parallelogram pattern, preferably an orthogonal pattern, of screen openings and the open areas of the imaged lacquer layer representing the pixel based design elements are arranged in an orthogonal raster.

    ONE-POT SYNTHESIS OF REACTIVE DEEP BLACK
    10.
    发明申请

    公开(公告)号:US20200115557A1

    公开(公告)日:2020-04-16

    申请号:US16604202

    申请日:2018-05-01

    Applicant: SPGPrints B.V.

    Abstract: A one-pot synthesis for preparing an aqueous reactive black mixture includes a) dissolving 2-[(4-aminophenyl)sulfonyl]ethanesulfonic acid (vinyl sulphone parabase ester) in water; b) diazotizing the dissolved vinyl sulphone parabase ester using excess nitrous acid or using excess nitrite and an acid, resulting in a diazonium salt and remaining nitrous acid; c) quenching the remaining nitrous acid with sulfamic acid; d) coupling the diazonium salt of step c) with 4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid (H-acid) until the reaction is complete, resulting in Reactive Black 5 (RB 5) and remaining diazonium salt, e) coupling the remaining diazonium salt with 7-acetamido-4-hydroxy-2-naphthalenesulfonic acid (acetyl-J-acid) until the reaction is complete resulting in Reactive Orange 78 (RO 78); and f) obtaining the aqueous reactive black mixture.

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