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    Method of operating a flexographic printing press, flexographic printing press, system, flexographic printing forme and a sleeve for a flexographic printing forme
    2.
    发明授权
    Method of operating a flexographic printing press, flexographic printing press, system, flexographic printing forme and a sleeve for a flexographic printing forme 有权

    公开(公告)号：US11712885B2

    公开(公告)日：2023-08-01

    申请号：US17507892

    申请日：2021-10-22

    申请人： Heidelberger Druckmaschinen AG

    发明人： Werner Schwab

    IPC分类号： B41F21/00 ,  B41F5/24

    CPC分类号： B41F21/00 ,  B41F5/24

    摘要： A method operates a flexographic printing press. The press contains a printing cylinder carrying a sleeve with at least one flexographic printing forme or a flexographic printing cylinder and an impression cylinder forming a printing nip with the printing cylinder to print on a web of printing substrate. The method includes automatically adjusting the transport speed of the web of printing substrate as a function of a dot density of the flexographic printing forme, i.e. of a location-dependent density of printing elevations on the flexographic printing forme, or of data computationally derived therefrom, or as a function of gaps of the flexographic printing forme or printing cylinder or data computationally derived therefrom. The printing press advantageously provides a cost-efficient way of producing high-quality prints in an industrial flexographic printing process while avoiding undesired vibration. In addition, the method of the invention advantageously provides further automation of the printing process.

    Transverse sheet withdrawal brake
    6.
    发明授权
    Transverse sheet withdrawal brake 有权

    公开(公告)号：US09969156B2

    公开(公告)日：2018-05-15

    申请号：US14872985

    申请日：2015-10-01

    申请人： Mueller Martini Holding AG

    发明人： Hanspeter Duss ,  Christian Troxler

    IPC分类号： B41F21/00 ,  B65H45/18 ,  B65H9/14

    CPC分类号： B41F21/00 ,  B65H9/14 ,  B65H45/18 ,  B65H2301/4492

    摘要： A method for operating a device that applies a force to a print sheet during a folding operation, wherein the print sheet is in a specified starting position prior to the folding operation. Braking-force triggering pulses are directed toward the print sheet to counter the acceleration of the print sheet in the starting phase of the folding operation and/or to counter fluttering movements that occur during the intake of the print sheet. The pulses exert an intermittent, uniform or oscillating force onto at least a section of the print sheet. The pulses are controlled by a control unit which operates based on control profiles resulting from queried operating parameters and/or based on stored control profiles.

    PRINTING METHOD AND PRINTING DEVICE
    10.
    发明申请
    PRINTING METHOD AND PRINTING DEVICE 审中-公开

    公开(公告)号：US20170165955A1

    公开(公告)日：2017-06-15

    申请号：US15313170

    申请日：2015-05-19

    申请人： GT + W GMBH

    发明人： ROBERT THIEME ,  THOMAS OBERLE ,  PATRICK SAUER

    IPC分类号： B41F21/00 ,  B41F13/00

    CPC分类号： B41F21/00 ,  B41F13/00 ,  B41F13/0045 ,  B41F21/08

    摘要： A printing unit has a printing form cylinder, an impression cylinder opposite the printing form cylinder and at least one substrate carrier apparatus with which a printing substrate is moved through between the printing form cylinder and the impression cylinder, wherein the substrate is printed in a printing region between the two cylinders. The substrate carrier apparatus is moved linearly during a uniform rotation of the two cylinders along a linearly extending track, limited in length by a longitudinal extension of the printing unit. The substrate carrier apparatus is accelerated from a resting start position to an operating speed, to be reached upon reaching the printing region, the substrate carrier apparatus is moved at least in the printing region at constant speed, and the substrate carrier apparatus is decelerated after leaving the printing region to a resting end position on the track.