WO2011072681A1 - Unité de distributeur d'encre pour machine d'impression rotative - Google Patents

Unité de distributeur d'encre pour machine d'impression rotative Download PDF

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Publication number
WO2011072681A1
WO2011072681A1 PCT/DK2010/000170 DK2010000170W WO2011072681A1 WO 2011072681 A1 WO2011072681 A1 WO 2011072681A1 DK 2010000170 W DK2010000170 W DK 2010000170W WO 2011072681 A1 WO2011072681 A1 WO 2011072681A1
Authority
WO
WIPO (PCT)
Prior art keywords
ink
chamber
profile
distributor unit
channels
Prior art date
Application number
PCT/DK2010/000170
Other languages
English (en)
Inventor
Benny Petersen
Original Assignee
Benny Petersen
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 Benny Petersen filed Critical Benny Petersen
Publication of WO2011072681A1 publication Critical patent/WO2011072681A1/fr

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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
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/20—Ink-removing or collecting devices

Definitions

  • the invention relates to an ink distributor unit for applying ink to a raster roller of a rotary printing machine, said ink distributor unit comprising an extruded profile with a trough for ink, said profile being provided with engagement faces for doctor blades arranged along the upper and lower edges of the trough and being engaged with the raster roller such that the trough and the raster roller form a first chamber, which is provided with an inlet for the supply of fresh ink, said profile additionally comprising a second chamber which communicates with the first chamber, said first chamber and said second chamber being arranged in close proximity to and along each other just separated by a wall.
  • WO 2006/035217 A1 discloses an ink distributor unit, which comprises an extruded profile provided with a chamber with doctor blades and with inlets and outlets.
  • Fig. 5 shows a version of the ink distributor unit which is provided with a movable scraper element for cleaning the ink chamber.
  • the extruded profile is extended with a space intended for a drive mechanism for the scraper element.
  • the extension is secured to the chamber profile in a manner which is not described in detail.
  • the purpose of the scraper element and of the configuration of the ink distributor unit is to establish an improved possibility of collecting and re-using as much as pos- sible of the excess ink in the chamber, e.g. when changing colour.
  • the document US 5,477,782 discloses an ink distributor unit which comprises a two chamber system (8, 9), fig. 1.
  • the chamber (8) is connected with an ink source under pressure and with an ink chamber (9), which is disposed in close proximity to the printing roller.
  • the unit is provided with a scraper (20) for removing excess ink, from which it drips down into an open collection trough (19).
  • Another object of the invention is to enhance the rigidity of the ink distributor unit so that the deflection of the unit is reduced as much as possible.
  • a further object of the invention is to reduce waste of ink and the amount of harmful vapours.
  • an ink distributor unit as described in the introductory portion of claim 1 , characterized in that one or more inlets pass transversely through the second chamber and terminate in the first chamber, and that channels are arranged between the chambers, said channels conveying excess ink from the first chamber to the second chamber, and that at least one outlet from the second chamber directs the excess ink further on to an external reservoir.
  • an ink distributor unit is achieved, which has a great rigidity, which is compact and relatively light, and where the channels between the chambers are as short as possible.
  • the channels between the two chambers are arranged partly in a high position and partly in a low position, and the high position is above the level of the inlet for fresh ink, and the low position is below the inlet for fresh ink at the bottom of the first chamber, then the high position determines the maximum/optimum ink level in the first chamber, and the low position ensures that emptying of the first chamber takes place at stoppage or change of ink, and a further advantage is that a sufficient supply of ink to the raster roller may be maintained.
  • the profile is configured such that the length of the profile corresponds to the length of a raster roller, and the profile and thereby the chambers are defined on the length of two tightly fitting end plates with stays for the suspension of the unit, then an ink distribution cov- ering the entire raster roller and a unit easy to mount and remove are achieved.
  • the engagement faces of the profile are configured for doctor blades with a groove which extends in the full length of the engagement faces for receiving a doctor clamp for clamping its respective doctor blade, it is ensured that the doctor blades may be mounted or re- moved merely by activating or releasing the doctor clamp, and that the doctor blades may be removed without the use of tools, e.g. at cleaning.
  • the profile is provided with upper and lower grooves which extend in the full length of the profile, and which are config- ured for receiving a plurality of locking elements for locking a doctor clamp, and when, as stated in claim 6, the locking element comprises a bolt and a finger nut, it is ensured that the doctor clamp may be activated or deactivated by a simple rotation of the locking element.
  • the doctor clamp is configured as an angular profile with a length like the profile and with an obtuse angle between the angle legs, and that the one angle leg is configured with a boss-like bulge in the full length of the angular profile, which protrudes into the area between the angle legs.
  • fig. 1 shows a perspective view of an exploded ink distributor unit with associated end plates and doctor clamp
  • figs. 2, 2a and 2b show sectional views of the profile of the ink distributor unit
  • fig. 3 shows the connections between the first chamber and the second chamber
  • fig. 4 shows a sectional view of a doctor clamp profile
  • fig.5 shows a locking element
  • figs. 6 and 6a show hand tools
  • figs. 7 and 7a show sealing elements.
  • FIG. 1 An ink distributor unit for applying ink to a raster roller for a rotary printing machine according to the invention is shown in figures 1 - 7.
  • Fig. 1 is a perspective view of an exploded ink distributor unit 1 with associated end plates 12 and doctor clamps 17.
  • the distributor unit 1 is composed of a profile 2 which is provided with a trough 3 for ink and a second chamber 6 for collecting excess ink.
  • Both the first chamber and the second chamber are closed by the end plates 12.
  • Channels 9, 10 are established between the two chambers 5, 6, which channels provide a safeguard against overflow, and which allow circulation of ink and emptying of the first chamber 5 at stoppage or change of ink.
  • the profile 2 is configured with upper and lower engagement faces 4, 4a for the doctor blades.
  • Figs. 2 and 2a show a sectional view of the profile 2.
  • the profile has a length corresponding to the raster roller with which it is to be engaged.
  • the figure shows the trough 3 which forms part of the first chamber 5, and that the second chamber 6 is arranged along and immediately behind the first chamber just separated by a wall 24. Both chambers have the same length as the profile 2 and thereby the same length as the raster roller.
  • the profile is provided with one or more inlets 7 which direct fresh ink from an external ink reservoir directly into the first chamber 5.
  • the inlet 7 passes transversely through the second chamber 6 and terminates in the first chamber 5. Inlets which are not used for an assigned task, are closed off by a plug.
  • the second chamber 6 is provided with one or more outlets 8 to an external ink reservoir.
  • the front edge of the profile is configured as engagement faces 4, 4a for the doctor blades.
  • the engagement faces extend in the full length of the profile and are provided with grooves 15, 16 of the same length as the pro- file for receiving doctor clamps 17.
  • the upper and lower sides of the profile are likewise provided with grooves 22, 23 for receiving locking elements 21.
  • the grooves extend in the full length of the profile.
  • the chamber 5 is filled with ink in that ink is pumped from an external reservoir through the inlet 7.
  • the supplied amount of ink must be adapted to the consumption, and it is important that the raster of the raster roller is constantly filled with ink.
  • the consumption is determined by the size of the pressure face and by the speed at which the rotary printing machine operates.
  • the pump pressure is adjusted such that the first chamber 5 is filled to a high level determined by the channels 9. Excess ink will seep back to the second chamber 6, from which it is discharged via the outlet 8 to an external reservoir.
  • the active length of the chambers may be reduced by introducing plastics gaskets 25 into the first chamber and sealing elements 13 into the second chamber.
  • the gaskets 25 are arranged in selected depressions 26 in the first chamber, and the sealing elements 13 are introduced to a desired position in the second chamber, by means of a hand tool 28 (see fig. 6a) configured as a threaded stay with a support plate and a handle. This allows blocking of areas of the chambers, so that unnecessary admission of ink is avoided, and the cleaning work and the consumption of cleaning liquid are reduced.
  • Channels 10 are arranged at a level lower than the inlet, which ensure circulation of ink back to the second chamber 6, and which are used for emptying the first chamber at stoppage or change of ink.
  • the end plates 12 are shown in fig. 1.
  • a sealing element 13 (see fig. 7), which is provided with depressions for O-rings 13a, is secured by screws to the end plate on the side facing inwards toward the chambers. End plates and sealing elements are made of an aluminium alloy.
  • the end plate On the opposite side, the end plate is provided with two stays 14 for the suspension of the distributor unit 1 from brackets on the printing machine. For cleaning, the distributor unit is lifted out of the printing machine. Then it is possible to pull the end plates 12 manually out of the profile by means of a simple hand tool 27 (see fig. 6), so that the chambers may be emptied completely and be cleaned.
  • the cleaning process has been simplified much with the distributor unit according to the invention. Thus, it is not necessary to arrange an open ink collection tray below the distributor unit, because the ink is encapsulated in the second chamber. Moreover, evaporation of the solvents in the ink and during the cleaning is reduced.
  • the doctor clamps 17 shown in fig. 1 , fig. 2b and fig. 4 are intended to secure the doctor blades and are configured as an angular profile with a length like the profile 2 and with an obtuse angle between the angle legs.
  • the one angle leg is provided with a boss-like bulge 18, which extends in the full length of the angular profile, and which protrudes into the area between the angle legs.
  • the doctor clamps are mounted in the profile 2 by moving the bulge 18 into the grooves 15 or 16. The clamps may now be tilted in the groove.
  • the doctor clamps 17 are activated or deactivated with one or more locking elements 21 shown in fig. 1 , fig. 2b and fig. 5.
  • Each locking element comprises a bolt 20 with a hexagonal head and a disc-shaped finger nut 19.
  • the bolts 20 are arranged in the grooves 22, 23, which are provided for receiving a bolt with a hexagonal head.

Landscapes

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

Abstract

La présente invention se rapporte à une unité de distributeur d'encre (1) pour appliquer de l'encre à un rouleau de trame d'une machine d'impression rotative, ladite unité de distributeur d'encre ayant un profil extrudé (2) avec un creux (3) pour l'encre, ledit profil étant pourvu de faces de mise en prise (4, 4a) pour des lames de racle disposées le long des bords supérieur et inférieur du creux et qui sont en prise avec le rouleau de trame de telle sorte que le creux et le rouleau de trame forment une première chambre (5) qui est pourvue d'au moins un orifice d'entrée (7) pour la fourniture de l'encre fraîche, et d'orifices de sortie (8) de l'encre en excès. Ladite unité de distributeur d'encre est caractérisée en ce que le profil (2) comprend en outre une seconde chambre (6) qui est raccordée à la première chambre par l'intermédiaire de canaux (9, 10) de telle sorte que les chambres forment un système continu à deux chambres. Cela permet d'utiliser la seconde chambre comme chambre de collecte de l'encre en excès puisque l'encre en excès s'infiltre à nouveau dans la chambre de collecte par l'intermédiaire des canaux situés entre la première chambre et la seconde chambre. En outre, le gaspillage de l'encre et les vapeurs nuisibles sont réduits puisque l'encre en excès est transportée dans des canaux fermés entre les chambres.
PCT/DK2010/000170 2009-12-14 2010-12-09 Unité de distributeur d'encre pour machine d'impression rotative WO2011072681A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200901318 2009-12-14
DKPA200901318A DK177195B1 (da) 2009-12-14 2009-12-14 Farvefordelingsenhed til en rotationstrykkemaskine

Publications (1)

Publication Number Publication Date
WO2011072681A1 true WO2011072681A1 (fr) 2011-06-23

Family

ID=43631393

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2010/000170 WO2011072681A1 (fr) 2009-12-14 2010-12-09 Unité de distributeur d'encre pour machine d'impression rotative

Country Status (2)

Country Link
DK (1) DK177195B1 (fr)
WO (1) WO2011072681A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2577894A (en) * 2018-10-09 2020-04-15 Absolute Engineering Ltd Cleaning system and method
WO2022194783A1 (fr) * 2021-03-17 2022-09-22 Bobst (Changzhou) Ltd Porte-racle
US11904599B2 (en) 2020-04-08 2024-02-20 Absolute Engineering Limited Cleaning system and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5477782A (en) 1992-04-03 1995-12-26 Komori-Chambon S.A. Inking device for photogravure printing apparatus
EP0941848A1 (fr) * 1998-03-11 1999-09-15 Mitsubishi Heavy Industries, Ltd. Alimentation en encre flexographique
DE19919667A1 (de) * 1998-05-01 1999-11-04 Langston Corp Farb-/Reinigungsflüssigkeitszuführsystem für eine Kammerrakel
DE19949100A1 (de) * 1999-10-12 2001-05-17 Kroenert Max Maschf Druckkammerrakel und Verfahren zum Auftragen eines Mediums auf eine Walze
WO2006035217A1 (fr) 2004-09-28 2006-04-06 Absolute Engineering Limited Systeme de recuperation d'encre

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5477782A (en) 1992-04-03 1995-12-26 Komori-Chambon S.A. Inking device for photogravure printing apparatus
EP0941848A1 (fr) * 1998-03-11 1999-09-15 Mitsubishi Heavy Industries, Ltd. Alimentation en encre flexographique
DE19919667A1 (de) * 1998-05-01 1999-11-04 Langston Corp Farb-/Reinigungsflüssigkeitszuführsystem für eine Kammerrakel
DE19949100A1 (de) * 1999-10-12 2001-05-17 Kroenert Max Maschf Druckkammerrakel und Verfahren zum Auftragen eines Mediums auf eine Walze
WO2006035217A1 (fr) 2004-09-28 2006-04-06 Absolute Engineering Limited Systeme de recuperation d'encre

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2577894A (en) * 2018-10-09 2020-04-15 Absolute Engineering Ltd Cleaning system and method
US11904599B2 (en) 2020-04-08 2024-02-20 Absolute Engineering Limited Cleaning system and method
WO2022194783A1 (fr) * 2021-03-17 2022-09-22 Bobst (Changzhou) Ltd Porte-racle

Also Published As

Publication number Publication date
DK200901318A (da) 2011-06-15
DK177195B1 (da) 2012-05-29

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