EP0725734B1 - Verbesserungen in oder im zusammenhang mit druckmaschinen - Google Patents

Verbesserungen in oder im zusammenhang mit druckmaschinen Download PDF

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Publication number
EP0725734B1
EP0725734B1 EP93909394A EP93909394A EP0725734B1 EP 0725734 B1 EP0725734 B1 EP 0725734B1 EP 93909394 A EP93909394 A EP 93909394A EP 93909394 A EP93909394 A EP 93909394A EP 0725734 B1 EP0725734 B1 EP 0725734B1
Authority
EP
European Patent Office
Prior art keywords
ink
chamber
plug
supply system
rail
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.)
Expired - Lifetime
Application number
EP93909394A
Other languages
English (en)
French (fr)
Other versions
EP0725734A1 (de
Inventor
David Mcmanamon
Stephen Mcmanamon
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.)
PRINTING PRESS SERVICES (HYDROSYSTEMS) Ltd
Original Assignee
PRINTING PRESS SERVICES (HYDROSYSTEMS) 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 PRINTING PRESS SERVICES (HYDROSYSTEMS) Ltd filed Critical PRINTING PRESS SERVICES (HYDROSYSTEMS) Ltd
Publication of EP0725734A1 publication Critical patent/EP0725734A1/de
Application granted granted Critical
Publication of EP0725734B1 publication Critical patent/EP0725734B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles

Definitions

  • the invention concerns improvements in or relating to printing machines, and has more particular reference to the supply of ink to the printing roller thereof.
  • GB-A-2258845 (publication date: 24.02.93) there is disclosed a means for supplying ink to a printing roller of a printing machine, the means including an elongate ink rail, an ink chamber in said rail and extending in the longitudinal direction thereof, a multiplicity of spaced parallel feed passages in said rail having respective outlet orifices at a common surface of said rail, the feed passages extending between said common surface and the said ink chamber, and means controlling the flow of ink to the feed passages.
  • AT-B-338 209 discloses in Fig. 5 thereof an inking rail with an ink chamber extending along it, and a plug sealingly mounted in the chamber to be movable along the chamber by means of compressed air.
  • the object of the present invention is to provide a means whereby ink supply means, particularly though not exclusively an ink supply means as aforesaid, might be cleaned in a ready and efficient manner, without the need to discard residual ink present at colour change.
  • the ink supply system including an elongate chamber defining an ink reservoir from which ink is delivered to the printing roller, in which ink is supplied to the opposite ends of the elongate chamber from respective differently coloured supplies thereof, the method also including the steps of providing a plug within the chamber, the plug being a close but sliding fit therein, and moving the plug longitudinally of the chamber to purge the chamber of the redundant ink and allow feed to the said chamber of the replacement ink.
  • the plug is moved longitudinally of the elongate chamber by feed pressure applied to the replacement ink.
  • suitable locking means for example magnetic
  • the elongate chamber might be divided into individual sections each delivering ink of a respective colour to a respective axial extent of the printing roller, shift of the plugs being effected by the pressure of the incoming ink, any necessary provision being made to supply ink to an intermediate section of the chamber.
  • the invention also includes apparatus for practising the method as aforesaid, and, according to a further aspect of the present invention there is proposed an ink supply system for a printing machine, the system including an ink supply system for a printing machine, the system including an elongate ink rail, an elongate ink chamber in said ink rail and extending in the longitudinal direction thereof, a multiplicity of parallel feed passages in said rail having respective outlet orifices at a common surface of said rail, the feed passages extending between said common surface and said chamber, ink supply means to supply ink to the opposite ends of the elongate chamber, and a plug within said chamber as a close fit therein, the plug being movable longitudinally of said chamber to purge the chamber of an ink whilst allowing feed to the chamber of a replacement differently coloured ink.
  • an ink supply arrangement for a printing machine comprises an ink rail 11 of a length in excess of the intended printing width and feed means 12, 13 for supplying ink to the respective ends of the rail, each feed means 12, 13 including an ink reservoir 14, a positive displacement pump 15 and a density control valve 16 to which ink from the reservoir 14 is fed by the pump 15 and from which ink is supplied to the rail 11.
  • the ink rail 11, see now Fig. 2, comprises an elongate, generally rectangular body 17, that face 18 of the body 17 intended for disposition in closely spaced opposed relationship with the roller (not shown) to which the ink is to be applied being of concave, part-cylindrical form of a curvature approximating to that of the said roller.
  • the body 17 is conveniently of aluminium and is split along its horizontal centre line to give upper and lower body parts 19, 21.
  • the upper face 22 of the lower body part 21 includes a channel 23 of semi-circular transverse cross-section to which ink is fed from the density control valve 16 through feed pipe 24.
  • the lower face 25 of the upper body part 19 has a channel 26 of like semi-circular transverse cross section to that provided in the lower body part 21, the channels 23, 26 in the respective body parts being arranged in superimposed register to define a circular ink chamber 27 in the body.
  • the upper body part 19 further includes a groove 28 longitudinally thereof and as an extension of the channel 26 into the body part, the groove 28 being of rectangular transverse cross section and being for a purpose hereafter to be made apparent.
  • a multiplicity of stepped holes 29 is provided in side-by-side disposition in the upper body part, the said holes extending parallel to the lower face 25 of said body part and throughout the full extent thereof.
  • the stepped holes 29 are so positioned as to pass through and transversely of the groove 28 and are each such as to provide an outer section, an intermediate section and an inner section of successively reducing diameters.
  • That part of the concave face 18 provided by the upper body part 19 is slotted in register with the inner section 31 of each stepped hole, the slots preferably being of arcuate section when considered in the longitudinal direction thereof with the slots of the successive stepped holes 29 (which provide feed passages) being in alignment longitudinally of the body part and merging one with another to give a continuous slot at the surface of the body part of cyclically varying depth.
  • Each stepped hole 29 receives a cylindrical key 32 into engagement therewith, the key 32 being movable axially of the stepped hole and being engageable with a flank 33 of the groove 28.
  • the key is mounted in a bush 34 seated in sealed relationship in the outer section of a respective stepped hole 29 and is screw-threadedly engaged therewith so as to be movable to or from engagement with the said flank 33.
  • the bush 34 has an hexagonal flange at its outer end which seats against the upper body part 19, thereby to ensure accuracy of location of the bush 34 axially of the stepped hole 29.
  • Outwardly of the bush the key 32 is secured to cylindrical collar 35 of sleeve-like form, there being a control slot 36 in the annular end face of the collar 35 to receive a radial pin 37 carried by a displacement means 38.
  • the displacement means 38 consists of a stepping motor, moving in 200 increments per revolution, drivingly connected with the key 32, whereby the key 32 is rotated for selective adjustment longitudinally of the bush 34, and thus relative to the step formed by flank 33, thereby to vary the cross-sectional dimensions of the flow passage between channel 27 and the inner section 31 of the stepped hole 29.
  • ink is delivered to the ink chamber 27 in the ink rail 11 from one or other feed means 12, 13 by the relevant positive displacement pump 15, a proportion of the ink delivered by such pump 15 passing to the chamber 27 and the balance returned to the reservoir 14 according to the setting of the density control valve 16.
  • Ink fed to the ink chamber 27 fills such chamber from the bottom, and thus no ink can be applied to the roller until such chamber is full and the ink therein is under pressure.
  • ink passes to the roller through the inner section 31 of the respective stepped holes 29 in the upper body part 19, the rate of feed at each position being variable according to the position of the respective key 32 relative to the adjacent end of such inner hole section.
  • each key is individually controllable as to rate of feed according to the setting of that key whilst the rate of delivery of the ink rail as a whole, and thus from the keys considered collectively, is variable by adjustment of the shuttle valve member.
  • the present invention contemplates the provision of a plug within the ink chamber for controlled movement longitudinally thereof, the plug 41 being of cylindrical form and being a close but sliding fit within the chamber 27.
  • the plug is grooved at its cylindrical surface to receive O-rings 42 into engagement therewith, as shown in Fig. 3, the said O-rings serving to provide a seal between the plug and the opposing cylindrical surface of the chamber.
  • the plug is located at one end of the ink chamber, being that end remote from the feed means in use, and serves to isolate the ink of the respective feed means 12, 13. If it is required to effect a colour change, the plug is moved longitudinally of the ink chamber under the effect of the line pressure of the replacement ink, the plug purging the chamber of ink present therein and returning such ink to the now non-effective feed means. It has been found that the effective seal between the plug and chamber surface provided by the O-rings not only maintains the ink of the two feed means in mutual isolation, but the O-rings remove ink from the surface of the chamber, and avoid contamination of the incoming ink.
  • any ink present in the stepped holes 29, which ink is of only minimal quantity, is discharged by the new ink at the onset of printing, and in practical terms there is no contamination of the replacement colour ink after initial operation of the printing press with the replacement colour ink.
  • means for example magnetic means, may be provided to locate the plug at a position intermediate the ends of the chamber, so as effectively to provide the facility for delivering ink of two different colours to the respective sides of the printing machine, the two colours being isolated by the plug.
  • plugs may be utilised simultaneously to divide the ink chamber into a corresponding number of sections each fed with ink of a requisite colour and in an appropriate manner.
  • ink is purged from the chamber in analogous manner to that mentioned above, but instead of effecting movement of the plug by utilising the line pressure of the incoming ink, a supply of cleaning fluid will be connected with the chamber and the pressure of that fluid can be used to move the plug.
  • the cleaning fluid will pass through the stepped holes and onto the printing roll, or indeed any intermediate transfer rolls, passing through the printing machine in like manner to ink and being available for application to the printing roll so as to clean the same.
  • the concept hereinproposed is intended for use particularly with the ink supply arrangement of the patent application aforesaid, the concept may be applied to any supply arrangement having an ink chamber of substantially uniform cross-section from which ink is fed to the printing roller or to transfer rollers, the plug being of a cross-section corresponding to the transverse cross-section of the chamber.
  • the invention does enable the recovery of material quantities of ink which would otherwise be discarded, and thus offers significant financial savings. Furthermore, the invention does provide a means whereby colour change can be effected in a simple manner with the minimum of machine down-time, such being particularly important in the context of high speed newspaper machines.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (9)

  1. Verfahren zum Bewirken eines Farbwechsels im Druckfarben-Zuführsystem einer Druckmaschine, wobei das Druckfarben-Zuführsystem eine langgestreckte Kammer (27) beinhaltet, die einen Farbbehälter definiert, aus dem Druckfarbe an den Druckzylinder geliefert wird, wobei Druckfarbe zu den einander entgegengesetzten Enden der langgestreckten Kammer (27) von betreffenden, verschiedenfarbigen Versorgungen (12, 13) derselben zugeführt wird, wobei das Verfahren auch die Schritte des Vorsehens eines Stopfens (41) innerhalb der Kammer (27), welcher Stopfen (41) darin in genauer, jedoch verschiebbarer Passung sitzt, sowie des Bewegens des Stopfens in Längsrichtung der Kammer (27) beinhaltet, um die Kammer (27) von der überschüssigen Druckfarbe zu reinigen und die Zufuhr der Austausch-Druckfarbe zu der genannten Kammer (27) zu ermöglichen.
  2. Verfahren wie in Anspruch 1 beansprucht, bei dem der Stopfen (41) in Längsrichtung der Kammer (27) unter der Einwirkung des Leitungsdruckes der Austausch-Druckfarbe bewegt wird.
  3. Verfahren wie in Anspruch 2 beansprucht, einschließlich des Schrittes des Zurückführens der überschüssigen Druckfarbe zu der nichtwirksamen Versorgung.
  4. Druckfarben-Zuführsystem für eine Druckmaschine, wobei das System eine langgestreckte Farbschiene, eine langgestreckte Farbkammer (27) in der genannten Farbschiene und mit Erstreckung in deren Längsrichtung, eine Mehrzahl paralleler Zuführdurchgänge (29) in der genannten Schiene mit betreffenden Auslaßöffnungen an einer gemeinsamen Oberfläche der genannten Schiene, wobei sich die Zuführdurchgänge zwischen der genannten gemeinsamen Oberfläche und der genannten Kammer (27) erstrecken, Druckfarben-Versorgungsmittel (12, 13) zum Zuführen von Druckfarbe zu den einander entgegengesetzten Enden der langgestreckten Kammer (27) sowie einen Stopfen (41) innerhalb der genannten Kammer, in diese genau eingepaßt, beinhaltet, wobei der Stopfen in Längsrichtung der genannten Kammer beweglich ist, um die Kammer (27) von einer Druckfarbe zu reinigen, während die Zuführung einer unterschiedlich gefärbten Austausch-Druckfarbe zur Kammer (27) ermöglicht wird.
  5. Druckfarben-Zuführsystem wie in Anspruch 4 beansprucht, außerdem ein Abdichtmittel (42) an dem Stopfen (41) beinhaltend, das mit der Kammer (27) in abdichtender Beziehung in Eingriff ist.
  6. Druckfarben-Zuführsystem wie in Anspruch 5 beansprucht, bei dem das Abdichtmittel O-Ringe (42) aufweist, die in betreffenden Nuten sitzen, die in der zylindrischen Oberfläche des Stopfens (41) vorgesehen sind.
  7. Druckfarben-Zuführsystem wie in Anspruch 4 beansprucht, bei dem die Bewegung des Stopfens (41) in Längsrichtung der Kammer (27) durch ein Druckfluidum hervorgerufen ist.
  8. Druckfarben-Zuführsystem wie in Anspruch 4 beansprucht, ferner ein Mittel beinhaltend, das dazu eingerichtet ist, den Stopfen an einer ausgewählten Position zwischen den Enden der Kammer (27) festzulegen.
  9. Druckfarben-Zuführsystem wie in Anspruch 4 beansprucht, das eine Mehrzahl von Stopfen (41) beinhaltet, die gesondert in Längsrichtung der Kammer (27) in ausgewählte Stellungen und zwischen ausgewählten Stellungen in derselben bewegbar sind.
EP93909394A 1992-04-25 1993-04-26 Verbesserungen in oder im zusammenhang mit druckmaschinen Expired - Lifetime EP0725734B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9209004A GB2266269B (en) 1992-04-25 1992-04-25 Improvements in or relating to printing machines
GB9209004 1992-04-25
PCT/GB1993/000864 WO1994007698A1 (en) 1992-04-25 1993-04-26 Improvements in or relating to printing machines

Publications (2)

Publication Number Publication Date
EP0725734A1 EP0725734A1 (de) 1996-08-14
EP0725734B1 true EP0725734B1 (de) 2000-11-08

Family

ID=10714568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93909394A Expired - Lifetime EP0725734B1 (de) 1992-04-25 1993-04-26 Verbesserungen in oder im zusammenhang mit druckmaschinen

Country Status (5)

Country Link
EP (1) EP0725734B1 (de)
JP (1) JP3277329B2 (de)
DE (1) DE69329658T2 (de)
GB (1) GB2266269B (de)
WO (1) WO1994007698A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7779758B2 (en) 2004-09-28 2010-08-24 Absolute Engineering, Limited Ink recovery system with shuttle member

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9404455D0 (en) * 1994-03-08 1994-04-20 Mcmanamon David E Improvements in or relating to ink supply means for a printing machine
DE10247778B4 (de) * 2001-11-09 2013-05-08 Heidelberger Druckmaschinen Ag Modular aufgebaute Farbdosiervorrichtung für eine Druckmaschine
WO2004110759A2 (en) * 2003-06-09 2004-12-23 Goss International, Inc. Offset printing press with cantilevered printing and inking modules
DE102004047935B3 (de) * 2004-10-01 2006-01-26 Technotrans Ag Vorrichtung zur Reinigung von Walzenoberflächen in Druckmaschinen
DE102007042463A1 (de) * 2007-09-06 2009-03-12 Manroland Ag Farbdosiervorrichtung für eine Druckmaschine
DE102008053178A1 (de) 2008-10-24 2010-05-12 Dürr Systems GmbH Beschichtungseinrichtung und zugehöriges Beschichtungsverfahren

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT338209B (de) * 1973-02-13 1977-08-10 Zimmer Peter Einrichtung zur reinigung von rakeleinrichtungen
EP0368485A3 (de) * 1988-10-31 1991-01-30 Seiken Graphics, Inc. Lithographisches Drucken
US5003876A (en) * 1989-02-10 1991-04-02 The Ward Machinery Company Printing apparatus with dual inking system
SE468467B (sv) * 1991-05-17 1993-01-25 Tetra Alfa Holdings Anordning foer faergmatning
GB9115285D0 (en) * 1991-07-15 1991-08-28 Mcmanamon David E Improvements in or relating to printing machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7779758B2 (en) 2004-09-28 2010-08-24 Absolute Engineering, Limited Ink recovery system with shuttle member

Also Published As

Publication number Publication date
WO1994007698A1 (en) 1994-04-14
JP3277329B2 (ja) 2002-04-22
GB9209004D0 (en) 1992-06-10
GB2266269A (en) 1993-10-27
DE69329658D1 (de) 2000-12-14
DE69329658T2 (de) 2001-06-21
GB2266269B (en) 1995-08-02
JPH08506280A (ja) 1996-07-09
EP0725734A1 (de) 1996-08-14

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