EP2805825A1 - Flüssigkeitsübertragungsvorrichtung - Google Patents

Flüssigkeitsübertragungsvorrichtung Download PDF

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Publication number
EP2805825A1
EP2805825A1 EP13168748.5A EP13168748A EP2805825A1 EP 2805825 A1 EP2805825 A1 EP 2805825A1 EP 13168748 A EP13168748 A EP 13168748A EP 2805825 A1 EP2805825 A1 EP 2805825A1
Authority
EP
European Patent Office
Prior art keywords
input signal
liquid
computer
motor
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.)
Ceased
Application number
EP13168748.5A
Other languages
English (en)
French (fr)
Inventor
designation of the inventor has not yet been filed The
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 EP13168748.5A priority Critical patent/EP2805825A1/de
Publication of EP2805825A1 publication Critical patent/EP2805825A1/de
Ceased 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
    • 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
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control

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 applying ink to a sheet printing or coating apparatus.
  • Sheet printing apparatus for example for printing sheet metal, apply ink via ink transfer rollers to an ink application roller which then applies ink to a sheet of metal to be printed.
  • ink transfer rollers In the case of printing artwork consisting of a detailed image surrounded by a densely printed background (known as picture framed artwork), undesirable abrupt tone changes can arise.
  • It is known to alleviate this problem by causing oscillation of one or more of the ink transfer rollers in a direction parallel to its respective axis of rotation.
  • This oscillation is achieved by means of gears connected to the ink application roller, the gears driving a cam which in turn drives a cam follower to cause oscillation of one or more ink transfer rollers in a direction along its respective axis of rotation.
  • Phase adjustment of the oscillation relative to the rotational phase of the ink application roller can be achieved by means of a separate mechanical phase shifting element which can also be motorised.
  • FIG. 1 An ink application apparatus 2 for a sheet printing apparatus (not shown) transfers ink from an ink reservoir (not shown) via ink transfer rollers 4, 6, 8, 10 to an ink application roller 12 which in turn applies ink to a sheet (not shown) to be printed.
  • the ink transfer rollers 4, 6, 8 are pivotally mounted to a frame 14, which can in turn pivot about pivot axis 16.
  • a drive roller 18 having a cam surface 20 is connected via gears (not shown) to the ink application roller 12 so that its rotation is synchronised with that of the ink application roller 12.
  • the cam surface 20 of the drive roller 18 engages a cam follower 22 of ink transfer roller 4 to cause reciprocating motion of the frame 14 about pivot axis 16. This in turn causes reciprocating linear motion of the ink transfer rollers 4, 6, 8 about their respective rotation axes.
  • 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, the liquid transfer apparatus comprising:-
  • this provides the advantage of enabling motion of the liquid transfer rollers to be controlled with greater flexibility and more precisely, which in turn leads to improved print quality.
  • Print quality can also be improved by selection of the location on the sheet of ink tonal disturbances occurring as a result of improved fluid transfer at the dwell points of reciprocating motion of the liquid transfer rollers, for example by arranging the tonal disturbance to be located at the plate gap.
  • the advantage is provided of avoiding the use of gear mechanisms, thereby reducing the cost of manufacture of the apparatus.
  • the apparatus may further comprise drive means adapted to be actuated by at least one said motor for causing said reciprocating motion of at least one said liquid transfer roller.
  • the drive means may comprise at least one lever pivotably mounted to a respective pivot axis such that reciprocating pivoting motion of said lever about said axis causes reciprocating motion of at least one said liquid transfer roller in a direction substantially parallel to an axis of rotation thereof.
  • This provides the advantage of enabling motion of a plurality of liquid transfer rollers to be caused by a single motor.
  • Reciprocating pivoting motion of at least one said lever about the corresponding said pivot axis may cause reciprocating movement of a plurality of said fluid transfer rollers.
  • the drive means may comprise at least one reciprocating member adapted to cause reciprocating pivoting motion of at least one said lever.
  • the drive means may comprise at least one rotating member having at least one cam member adapted to cause reciprocating motion of at least one respective cam follower.
  • the control means may be adapted to receive a second input signal dependent on content of an image to be printed to a sheet and to control at least one said motor in dependence on said second input signal.
  • This provides the advantage of enabling reciprocating motion of the rollers to be better matched to the image to be printed, thereby further improving image quality.
  • the apparatus may further comprise second signal generating means for generating said second input signal.
  • the apparatus may further comprise image scanning means for scanning said image and generating said second input signal.
  • 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 cause said control means to receive a first input signal dependent on a rotational position of said liquid application roller and to control operation of at least one said motor in dependence on said first input signal.
  • the computer program product may further comprise second computer code executable by a computer to cause said control means to receive a second input signal dependent on content of an image to be printed to a sheet and to control at least one said motor in dependence on said second input signal.
  • the computer program product may further comprise third computer code executable by a computer for generating said second input signal.
  • the computer program product may further comprise fourth computer code executable by a computer to cause said image scanning means to scan said image and generate said second input signal.
  • an ink transfer apparatus 102 embodying the present invention transfers ink from an ink reservoir (not shown) via a series of ink transfer rollers 104, 106, 108 to an ink application roller 110 which in turn applies the ink to a sheet of metal (not shown).
  • a controller receiving first input signals from a detector (not shown) to provide control signals dependent upon the rotational position of the ink application roller 110 controls a motor 112 which drives a crankshaft 114 to cause reciprocating motion of a drive cylinder 116 in a direction generally parallel to its axis of rotation 118.
  • the drive cylinder 116 is connected to first ends of respective levers 120, 122, 124, each of which can pivot about a respective pivot axis 126, 128, 130, the second ends of the levers 120, 122, 124 being connected respectively to ink transfer roller 104 and reciprocating cylinders 132, 134.
  • Each of the reciprocating cylinders 132, 134 can execute oscillating motion in a direction generally parallel to its longitudinal axis and is connected to a first end of respective lever 136, 138 which can pivot about a respective pivot axis 140, 142.
  • the levers 136, 138 are connected at their respective second ends to ink transfer rollers 106, 108 respectively such that reciprocating linear motion of reciprocating cylinders 132, 134 causes reciprocating linear motion of the ink transfer rollers 106, 108 in a direction generally parallel to their respective axes of rotation 144, 146.
  • the controller can also receive second input signals from an image scanner (not shown) which scans the image to be printed, and generates the second input signals by means of image interpretation software, such as software used for making lithographic printing plates. The controller then controls operation of the motor 112 in dependence on the 2 nd input signals.
  • image scanner not shown
  • image interpretation software such as software used for making lithographic printing plates.
  • the ink transfer rollers 104, 106, 108 are not driven continuously by means of gears connected to the ink application roller 110, but are driven by the motor 112 under the action of the controller, the nature of the reciprocating linear motion of the ink transfer rollers 104, 106, 108 has a much greater flexibility of control.
  • the reciprocating linear motion can be driven intermittently to concentrate its effects on a selected region of the metal sheet being printed, and a much wider range of motion profiles can be achieved than is possible with cam and gear mechanisms driven by the ink application roller 110.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP13168748.5A 2013-05-22 2013-05-22 Flüssigkeitsübertragungsvorrichtung Ceased EP2805825A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13168748.5A EP2805825A1 (de) 2013-05-22 2013-05-22 Flüssigkeitsübertragungsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13168748.5A EP2805825A1 (de) 2013-05-22 2013-05-22 Flüssigkeitsübertragungsvorrichtung

Publications (1)

Publication Number Publication Date
EP2805825A1 true EP2805825A1 (de) 2014-11-26

Family

ID=48534170

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13168748.5A Ceased EP2805825A1 (de) 2013-05-22 2013-05-22 Flüssigkeitsübertragungsvorrichtung

Country Status (1)

Country Link
EP (1) EP2805825A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016107631A1 (en) * 2014-12-29 2016-07-07 Hewlett-Packard Indigo B.V. Application of coating fluid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004048149A1 (de) * 2004-10-02 2006-04-06 Koenig & Bauer Ag Verfahren zum Betreiben eines Farbwerkes einer Rotationsdruckmaschine
EP1820648A2 (de) * 2006-02-21 2007-08-22 MAN Roland Druckmaschinen AG Farbwerk, sowie Verfahren zur sujetspezifischen Abstimmung eines Konfigurationszustandes desselben
DE102007041680A1 (de) * 2007-09-01 2009-03-05 Manroland Ag Changierwalze einer Druckmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004048149A1 (de) * 2004-10-02 2006-04-06 Koenig & Bauer Ag Verfahren zum Betreiben eines Farbwerkes einer Rotationsdruckmaschine
EP1820648A2 (de) * 2006-02-21 2007-08-22 MAN Roland Druckmaschinen AG Farbwerk, sowie Verfahren zur sujetspezifischen Abstimmung eines Konfigurationszustandes desselben
DE102007041680A1 (de) * 2007-09-01 2009-03-05 Manroland Ag Changierwalze einer Druckmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016107631A1 (en) * 2014-12-29 2016-07-07 Hewlett-Packard Indigo B.V. Application of coating fluid
CN107000428A (zh) * 2014-12-29 2017-08-01 惠普印迪格公司 涂覆流体的施加
CN107000428B (zh) * 2014-12-29 2019-09-17 惠普印迪格公司 涂覆流体的施加
US10744755B2 (en) 2014-12-29 2020-08-18 Hp Indigo B.V. Application of coating fluid using movable rollers

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