EP2805824A1 - Flüssigkeitsübertragungsvorrichtung - Google Patents

Flüssigkeitsübertragungsvorrichtung Download PDF

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Publication number
EP2805824A1
EP2805824A1 EP13168746.9A EP13168746A EP2805824A1 EP 2805824 A1 EP2805824 A1 EP 2805824A1 EP 13168746 A EP13168746 A EP 13168746A EP 2805824 A1 EP2805824 A1 EP 2805824A1
Authority
EP
European Patent Office
Prior art keywords
motor
roller
liquid
input signal
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13168746.9A
Other languages
English (en)
French (fr)
Inventor
James Anthony Graham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Crabtree of Gateshead Ltd
Original Assignee
Crabtree of Gateshead Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Crabtree of Gateshead Ltd filed Critical Crabtree of Gateshead Ltd
Priority to EP13168746.9A priority Critical patent/EP2805824A1/de
Priority to PCT/EP2014/059759 priority patent/WO2014187699A1/en
Publication of EP2805824A1 publication Critical patent/EP2805824A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/004—Driving means for ink rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/004—Electric or hydraulic features of drives
    • B41F13/0045—Electric driving devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/15—Devices for moving vibrator-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers

Definitions

  • the present invention relates to a liquid transfer apparatus for transferring liquid to at least one roller of a sheet printing or coating apparatus.
  • the invention relates particularly, but not exclusively, to an apparatus for transferring ink in a lithographic sheet printing apparatus.
  • Ink application apparatus in which ink is transferred from an ink reservoir via alternating rubber ink transfer rollers and copper ink transfer rollers to rubber inker rollers in contact with the surface of a copper plate cylinder for transferring an image for printing via a rubber blanket cylinder to a metal sheet.
  • the plate cylinder is connected via gears to the other copper rollers, and the copper rollers drive the rubber rollers with which they are in contact by friction.
  • the plate cylinder and some of the copper ink transfer rollers drive inker rollers in contact with the surface of the plate cylinder by friction such that the rotational velocities of the plate cylinder and contacting inker rollers are matched to minimise relative motion between the mutually contacting parts of the inker rollers and the plate cylinder.
  • This arrangement suffers from the drawback that under certain circumstances, for example as a result of some ink media where solvent action is aggressive to rubber parts of rollers, some swelling or shrinkage can occur as a result of which changes in roller diameter can occur. As a result, relative movement of the touching points of the rollers occurs, which in turn causes degraded print performance and wasted power consumption.
  • This known arrangement also suffers from the disadvantage that adjustments to plate cylinder dressings (underpackings) for adjusting the length of the printed image will directly affect surface velocity matching. Furthermore, in order to wash the inker, or run the inker for printing preparation, but without running the press, it is necessary to provide an auxiliary motor and clutched transmission, which significantly increases the cost of the apparatus.
  • Preferred embodiments of the present invention seek to overcome one or more of the above disadvantages of the prior art.
  • a liquid transfer apparatus for transferring liquid to at least one roller of a sheet printing or sheet coating apparatus having a liquid application roller for applying liquid to a sheet of material, the liquid transfer apparatus comprising:
  • control means for (i) receiving at least one first input signal dependent on at least one operating parameter of a respective said first motor and at least one second input signal dependent on at least one operating parameter of a respective second motor for causing rotation of a liquid application roller for applying liquid to a sheet of material, and for (ii) controlling at least one said first motor and at least one said second motor in dependence on at least one said first input signal and at least one said second input signal to reduce relative movement between a location on a surface of at least one said first roller touching a said third roller and a location on a surface of said third roller touching said first roller, this provides the advantage of enabling relative movement between the contact points on the surfaces of the first roller and the corresponding third roller to be minimised, thereby minimising shear forces applied to the liquid, as a result of which print quality and efficiency of energy consumption can be improved.
  • the present invention also has the advantage that the gears driving the rollers can be subjected to a slight preload, which reduces rattling during operation of the apparatus, thereby further improving print quality.
  • the further advantage is provided that an inker of the apparatus can be driven independently of the press, thereby avoiding the need for a clutched transmission and therefore reducing the cost of the apparatus.
  • the control means may be adapted to determine at least one first torque generated by a respective said first motor and at least one second torque generated by a respective said second motor.
  • the control means may be adapted to generate at least one first output signal for controlling a respective said first motor and at least one second output signal for controlling a respective said second motor and to adjust at least one said first and/or second output signal in response to changes in at least one said first and/or second input signal.
  • a sheet printing or sheet coating apparatus comprising a liquid application roller for applying liquid to a sheet of material, a liquid transfer apparatus as defined above, at least one third roller for receiving liquid from at least one said first roller, and at least one second motor for causing rotation of said liquid application roller.
  • a computer program product adapted to be executed by a computer to control a liquid transfer device as defined above, the computer program product comprising first computer code executable by a computer to cause said control means to (i) receive at least one first input signal dependent on at least one operating parameter of a respective said first motor and at least one second input signal dependent on at least one operating parameter of a respective second motor for causing rotation of a liquid application roller for applying liquid to a sheet of material, and (ii) control at least one said first motor and at least one said second motor in dependence on at least one said first input signal and at least one said second input signal to reduce relative movement between a location on a surface of at least one said first roller touching a said third roller and a location on a surface of said third roller touching said first roller.
  • the computer program product may further comprise second computer code executable by a computer to cause said control means to determine at least one first torque generated by a respective said first motor and at least one second torque generated by a respective said second motor.
  • the computer program product may further comprise third computer code executable by a computer to cause said control means to generate at least one first output signal for controlling a respective said first motor and at least one second output signal for controlling a respective said second motor and to adjust at least one said first and/or second output signal in response to changes in at least one said first and/or second input signal.
  • Figure 1 is a schematic end view of part of a sheet printing apparatus embodying the present invention.
  • a sheet printing apparatus 2 of the present invention for applying ink to a sheet 4 of material such as metal receives the sheet 4 in the direction of arrow A between a copper impression cylinder 6 and a rubber blanket cylinder 8 for transferring an image to the sheet 4, in a manner which will be familiar to persons skilled in the art.
  • Ink is transferred from an ink reservoir (not shown) via first rubber ink transfer rollers 10, 12 and first copper ink transfer rollers 11, 13, 15 to rubber second ink transfer rollers 14, 16, 18, 20 which are in rolling contact with the surface of a plate cylinder 22 and which are known to persons skilled in the art as inker rollers.
  • the first copper ink transfer rollers 11, 13, 15 are driven by means of a first motor 24 connected to gears (not shown), and rotation of the first copper ink transfer rollers 11, 13, 15 drives first rubber ink transfer rollers 10, 12 and second rubber ink transfer rollers 14, 16, 18, 20 by means of friction.
  • the first motor 24 provides first input signals via first input line 26 to a controller 28 enabling the controller 28 to determine the torque generated by the first motor 24.
  • the controller 28 provides first output signals along first output line 30 for controlling operation of the first motor 24.
  • the impression cylinder 6 and plate cylinder 22 are interconnected by gears (not shown) and are driven via a drive gear 32 connected via a bevel gear 34 to an output shaft of a second motor 36, and rotation of the copper impression cylinder 6 and copper plate cylinder 22 causes rotation of the rubber blanket cylinder 8 by friction.
  • the second motor 36 provides second input signals via second input line 38 to the controller 28 enabling the controller 28 to determine the torque generated by the second motor 36.
  • the controller 28 also provides second output signals along second output line 40 for controlling operation of the second motor 36.
  • the controller 28 determines the torque generated by the first 24 and second 36 motors and controls operation of the first 24 and second 36 motors to minimise relative motion between the mutually touching locations on the surfaces of the second ink transfer rollers 14, 16, 18, 20 and the plate cylinder 22. This reduces the shear forces on the ink applied to the plate cylinder 22 by the second ink transfer rollers 14, 16, 18, 20, thereby improving the print quality.
  • the controller 28 can operate by means of a suitable algorithm, or can apply incremental changes to the first and second control signals and increase, maintain or decrease those changes in response to detected changes in the first and second input signals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
EP13168746.9A 2013-05-22 2013-05-22 Flüssigkeitsübertragungsvorrichtung Withdrawn EP2805824A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13168746.9A EP2805824A1 (de) 2013-05-22 2013-05-22 Flüssigkeitsübertragungsvorrichtung
PCT/EP2014/059759 WO2014187699A1 (en) 2013-05-22 2014-05-13 Liquid transfer apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13168746.9A EP2805824A1 (de) 2013-05-22 2013-05-22 Flüssigkeitsübertragungsvorrichtung

Publications (1)

Publication Number Publication Date
EP2805824A1 true EP2805824A1 (de) 2014-11-26

Family

ID=48534169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13168746.9A Withdrawn EP2805824A1 (de) 2013-05-22 2013-05-22 Flüssigkeitsübertragungsvorrichtung

Country Status (2)

Country Link
EP (1) EP2805824A1 (de)
WO (1) WO2014187699A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107175887A (zh) * 2017-05-27 2017-09-19 东台世恒机械科技有限公司 一种印刷机驱动装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042264A1 (de) * 2004-09-01 2006-03-02 Koenig & Bauer Ag Verfahren zum Betreiben eines Rotationskörpers mit Enzelantrieb
WO2007099147A2 (de) * 2006-03-03 2007-09-07 Koenig & Bauer Aktiengesellschaft Druckwerke einer druckmaschine
US20100326303A1 (en) * 2009-06-26 2010-12-30 Heidelberger Druckmaschinen Aktiengesellschaft Method of controlling an ink profile in an inking unit during interruptions of a printing operation
EP2357083A1 (de) * 2010-02-08 2011-08-17 Komori Corporation Antriebssteuerungsverfahren und Antriebssteuerungsvorrichtung für eine Druckmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042264A1 (de) * 2004-09-01 2006-03-02 Koenig & Bauer Ag Verfahren zum Betreiben eines Rotationskörpers mit Enzelantrieb
WO2007099147A2 (de) * 2006-03-03 2007-09-07 Koenig & Bauer Aktiengesellschaft Druckwerke einer druckmaschine
US20100326303A1 (en) * 2009-06-26 2010-12-30 Heidelberger Druckmaschinen Aktiengesellschaft Method of controlling an ink profile in an inking unit during interruptions of a printing operation
EP2357083A1 (de) * 2010-02-08 2011-08-17 Komori Corporation Antriebssteuerungsverfahren und Antriebssteuerungsvorrichtung für eine Druckmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107175887A (zh) * 2017-05-27 2017-09-19 东台世恒机械科技有限公司 一种印刷机驱动装置

Also Published As

Publication number Publication date
WO2014187699A1 (en) 2014-11-27

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