EP1800863B1 - Dispositif d'encrage et procédé d'ajustement correspondant - Google Patents

Dispositif d'encrage et procédé d'ajustement correspondant Download PDF

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Publication number
EP1800863B1
EP1800863B1 EP06291983A EP06291983A EP1800863B1 EP 1800863 B1 EP1800863 B1 EP 1800863B1 EP 06291983 A EP06291983 A EP 06291983A EP 06291983 A EP06291983 A EP 06291983A EP 1800863 B1 EP1800863 B1 EP 1800863B1
Authority
EP
European Patent Office
Prior art keywords
axis
roller
inking
inking device
offset
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.)
Not-in-force
Application number
EP06291983A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1800863A1 (fr
Inventor
Nicolas Rousseau
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.)
Goss International Montataire SA
Original Assignee
Goss International Montataire SA
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 Goss International Montataire SA filed Critical Goss International Montataire SA
Publication of EP1800863A1 publication Critical patent/EP1800863A1/fr
Application granted granted Critical
Publication of EP1800863B1 publication Critical patent/EP1800863B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/34—Cylinder lifting or adjusting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other detectors

Definitions

  • the film pick roller has an axis movable relative to the axis of the ink roller.
  • the inking devices are also provided with means for fixing the axis of the film-taking roller with respect to the axis of the ink-roller.
  • the distance between the ink roll and the film roll is adjusted by shims.
  • the shims of a certain thickness are slid between the ink roller and the film pick roller.
  • the position of the film pick-up roller (also called pick-up roller) is set so that it is in contact with these wedges when in the printing position. Then the film pick roller is fixed and the shims are removed.
  • the invention aims to overcome the disadvantages mentioned, and to provide an inking device that allows a more reliable and easier adjustment for a regular supply of ink.
  • the subject of the invention is an inking device of the aforementioned type, characterized in that it comprises detection means adapted to evaluate the actual distance between the takeup roller and the film-taking roller in the width of printing and / or detecting an angular offset of the two axes relative to each other and to provide an output signal representing this angular offset.
  • FIG. 1 On the figure 1 is represented a printing unit according to the invention, designated by the general reference 2.
  • This printing unit 2 comprises a plate roll 4 and a blanket roller 6 which is adapted to print an image on a paper web 8 which forms a printing medium.
  • the printing unit 2 is provided with an inking device 10, as well as a multitude of distributor rollers 12.
  • the inking device 10 is provided with an ink reservoir 14, a film-taking roller 16, rotatable about a first axis XX, and an ink-jet roller 18 which is adapted to transfer from the ink tank ink 14 to the takeup roll 16 and which is rotatable about a second axis YY.
  • the ink tank 14 comprises two side plates 20, one of which is shown, and a multitude of adjusting screws 22, which are movable and which make it possible to locally adjust the thickness of the ink transmitted from the reservoir of ink 14 on the ink roller 18.
  • the ink roller 18 is housed in a printer frame 24, so that its axis YY is fixed.
  • the ink roller 18 defines a print width L extending parallel to the YY axis.
  • the inking device 10 also defines the following quantities:
  • the distance ⁇ is the distance between the takeup roller 16 and the ink roller 18 at a given axial location.
  • the distance dimensioned function ⁇ CF is the actual distance between the take-up roller 16 and the ink roller 18 at one axial end and the distance on the control side ⁇ CC is the actual distance between the take-up roller 16 and the ink roller 18 at the end. other axial end (see in particular Figure 2 ).
  • the lithographic offset or lithographic offset of a set screw 22 is the position of the set screw 22 at which the thickness of the ink transferred to the ink roll 18 is equal to the distance between the roll 18 and the gripper roll 16 at the axial position of the associated adjusting screw 22.
  • the adjusting screw 22A of the Figure 2 it is the position at which the thickness of ink on the ink roller 18 is equal to the difference ⁇ CF.
  • the distance ⁇ setpoint is the required distance between the ink roller 18 and the takeup roller 16 to obtain an optimal adjustment behavior of the adjusting screws 22. This distance st predetermined for a given print command.
  • the inking device 10 is provided with detection means 28 adapted to detect an angular offset of the two axes X-X and Y-Y relative to each other.
  • the inking device 10 is further provided with control means 30 adapted to angularly move the first axis X-X relative to the second axis Y-Y.
  • the detection means 28 comprise a plurality of sensors 32 adapted to reveal the density of the ink printed on the printing medium 8, at different locations on the printing width L.
  • the detection means 28 furthermore comprise a first microcontroller 34A to which the sensors 32 are connected via a detection line 36.
  • the detection means 28 are provided with a multitude of sensors 38 which are adapted to detect the position of each of the adjusting screws 22 via a detection line 40A connected to the first microcontroller 34A.
  • the first microcontroller 34A is adapted to calculate and supply an output signal to the control means 30 by an output line 37.
  • This output signal represents the angular offset of the axis XX with respect to the axis YY.
  • the film-taking roller 16 comprises at each end a pin 42 of axis XX.
  • the control means 30 comprise a second microcontroller 34B to which the first microcontroller 34A is connected by the line 37.
  • This second microcontroller 34B is adapted to receive the signal representing the positioning of the film-taking roller 16 and in particular the angular offset of the two axes XX and YY.
  • the output signal also represents the distance ⁇ between the film-taking roller 16 and the ink roller 18 and in particular at at least two locations over the printing width L. These distances are in this case ⁇ CC and ⁇ CF at the two ends the print width L.
  • the control means 30 comprise two motors 46 and transmission means which are formed by a threaded rod 48 received in a threaded bush 50 fixed on a spherical joint 44.
  • Each pin 42 is freely rotatably received in one of the spherical joints 44.
  • the transmission means 42, 48, 50 are adapted for each of the motors 46 to transmit the drive of the associated motor 46 in an angular displacement of the first axis X-X relative to the second axis Y-Y. More specifically, the displacement of the end of the film-taking roller 16 is carried out radially with respect to the second axis Y-Y.
  • the transmission means 42, 48, 50 are also adapted to translate the film take-up roller 16 in translation radially relative to the second Y-Y axis by simultaneously driving the two motors 46.
  • the control means 30 further comprise a control line 40B which connects the second micro-controller 34B to each of the adjustment screws 22.
  • the control means 30 are adapted to control the position of the adjusting screws 22 via the second microcontroller 34B.
  • the inking device operates in the following manner.
  • the sensors 32 raise this real density of the ink printed on the strip 8 at several places distributed over the printing width L. Then, signals representing the real density of the ink at these locations are transferred. by line 36 to the first microcontroller 34A, which calculates a correction value of the set screw aperture 22 needed to achieve a target optical density at each of the locations. This is the typical operation of a loop ink density control system.
  • the microcontroller 34A calculates the offset ⁇ between the X-X and Y-Y axes and the real difference ⁇ between the rollers 16 and 18.
  • This memory 47 is connected to the first microcontroller 34A via a line 47A and is adapted to send the values TC thereto.
  • the sensors 32 and the detection line 36 are omitted.
  • the control and corrections of the opening of the inking screws 22 are not performed by a loop control system using these sensors 32 but manually by an operator.
  • the data sent is represented on the Figure 4B .
  • the Figure 4B shows for screws number 1 to 26 the opening OV of the adjusting screws. Thus, the number one screw is open at around 56%.
  • TC coverage rates ie the amount of ink required to ensure a uniform print density across the print width, when preparing of printing.
  • This data is sent to the first micro-controller 34-A by the control link 47A.
  • the OV values of the openings of the screws 22 are sent to the microcontroller 34A by the line 40A.
  • the OL offset values are then obtained by adjusting screw 22, which is shown in FIG. Figure 4C .
  • the offset values are converted into a linear curve DL, for example by linear regression.
  • This curve DL is inclined by an angle ⁇ with respect to the abscissa.
  • the DL curve also defines a lithographic offset on the OLCF function side and a lithographic offset on the OLCC control side at both ends of the print width L.
  • lithographic offset values OLCF and OLCC are converted into the distances between the film take-up roller 16 and the ink roller 18 at both ends of the print width ⁇ CF and ⁇ CC.
  • the angular deflection ⁇ and thus the actual angular offset, is compared with a predetermined threshold angular deflection which is greater than 0 °. Then, only when the angular deflection is greater than the threshold deviation, the angular offset is reduced or brought to zero. Thus, a modification of a negligible non-parallelism between the two axes XX and YY is avoided.
  • control means 30 await the termination of the current command before driving the motors 46.
  • the following command can be started.
  • the influence of a change in the position of the adjusting screws 22 during the current command can be avoided.
  • An improved variant of the operating mode of the inking device is as follows.
  • the microcontroller 34A evaluates the representative values of the last n works of the angular offset between the axis XX of the takeup roller 16 and the YY axis of the ink roller 18, as well as the distance ⁇ CC and ⁇ CF between the ink roll and the film pick roller at both ends of the print width. Signals representing these values are sent via line 37 to microcontroller 34B.
  • the microcontroller 34B slaves the motors 46 in order to reduce the angular offset ⁇ , in a manner similar to that described above, and to position the film take-up roller at the set distance of the ink roller.
  • the output line 37 is connected to a display unit which is adapted to display an offset value representing the angular offset of the X-X and Y-Y axes.
  • the control means 30 are actuated by an operator as a function of the displayed value.
  • the control means 30 may include micrometer screws which replace the motors 46, the threaded rods 48 and the threaded bushings 50 of the embodiment described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP06291983A 2005-12-23 2006-12-19 Dispositif d'encrage et procédé d'ajustement correspondant Not-in-force EP1800863B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0513273A FR2895310B1 (fr) 2005-12-23 2005-12-23 Dispositif d'encrage et procede d'ajustement correspondant

Publications (2)

Publication Number Publication Date
EP1800863A1 EP1800863A1 (fr) 2007-06-27
EP1800863B1 true EP1800863B1 (fr) 2008-12-10

Family

ID=37037075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06291983A Not-in-force EP1800863B1 (fr) 2005-12-23 2006-12-19 Dispositif d'encrage et procédé d'ajustement correspondant

Country Status (6)

Country Link
US (1) US7984673B2 (zh)
EP (1) EP1800863B1 (zh)
JP (1) JP2007168441A (zh)
CN (1) CN1986220B (zh)
DE (1) DE602006004151D1 (zh)
FR (1) FR2895310B1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8763528B2 (en) 2010-12-09 2014-07-01 Goss International Americas, Inc. Closed loop color control of selected regions using solid color regions within images
EP2818319B1 (de) * 2013-06-28 2015-08-05 CONPRINTA GmbH & Co. KG Druckwerk
US9421756B1 (en) * 2015-04-23 2016-08-23 Eastman Kodak Company Roller contact adjustment for flexographic printing system
CN105034588B (zh) * 2015-08-31 2017-05-03 南通市乐悦实业有限公司 防结皮的印刷机墨斗装置
CN109397874B (zh) * 2018-12-13 2020-11-10 嘉兴艾科新材料科技有限公司 一种凹版印刷机用油墨槽
CN110605902B (zh) * 2019-10-25 2021-01-26 昆山市生力包装印务有限公司 一种凹版印刷机

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568761A (en) * 1946-03-22 1951-09-25 Miehle Printing Press & Mfg Pressure adjustment and trip for printing cylinders
US3869984A (en) * 1973-08-06 1975-03-11 Addressograph Multigraph Fluid film thickness sensor and control system for utilizing same
DE2609513C3 (de) * 1976-03-08 1979-03-29 Windmoeller & Hoelscher, 4540 Lengerich Vorrichtung zum An- und Abstellen eines auf den Formzylinder einer Tiefdruckmaschine wirkenden Presseurs Windmoller & Hölscher, 4540 Len¬
DE3238912C1 (de) * 1982-10-21 1984-03-15 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum zonenweisen Abtasten der Einfaerbung eines Plattenzylinders einer Rotations-Offsetdruckmaschine
CH679919A5 (zh) * 1989-10-23 1992-05-15 Patric Albiez
DE4211379C2 (de) * 1992-04-04 1999-01-07 Roland Man Druckmasch Anilox-Offset-Druckeinheit mit einem Kurzfarbwerk
JP2585995Y2 (ja) * 1992-10-01 1998-11-25 株式会社小森コーポレーション 胴着脱装置
JP3718275B2 (ja) * 1996-01-12 2005-11-24 株式会社小森コーポレーション 印刷機
US5967049A (en) * 1997-05-05 1999-10-19 Quad/Tech, Inc. Ink key control in a printing press including lateral ink spread, ink saturation, and back-flow compensation
US6347585B1 (en) * 1998-08-04 2002-02-19 Goss Graphic Systems, Inc. Variable gap stabilizer
DE19911568A1 (de) * 1999-03-16 2000-09-21 Heidelberger Druckmasch Ag Verfahren zum Einfeuchten einer Flachdruckform und Feuchtwerk einer Flachdruckmaschine
DE10021540A1 (de) * 2000-05-03 2001-11-08 Koenig & Bauer Ag Anordnung zur Einstellung eines Abstandes von Rotationsachsen von Zylindern
DE102004008090A1 (de) * 2004-02-19 2005-09-08 Man Roland Druckmaschinen Ag Vorrichtung zum Positionieren einer Walze in einem Farb- oder Feuchtwerk einer Rotationsdruckmaschine

Also Published As

Publication number Publication date
DE602006004151D1 (de) 2009-01-22
JP2007168441A (ja) 2007-07-05
FR2895310A1 (fr) 2007-06-29
FR2895310B1 (fr) 2009-04-17
US20070151470A1 (en) 2007-07-05
US7984673B2 (en) 2011-07-26
EP1800863A1 (fr) 2007-06-27
CN1986220B (zh) 2013-11-06
CN1986220A (zh) 2007-06-27

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