EP0916492B1 - Dispositif d'alimentation du produit de nettoyage liquide - Google Patents

Dispositif d'alimentation du produit de nettoyage liquide Download PDF

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Publication number
EP0916492B1
EP0916492B1 EP97119983A EP97119983A EP0916492B1 EP 0916492 B1 EP0916492 B1 EP 0916492B1 EP 97119983 A EP97119983 A EP 97119983A EP 97119983 A EP97119983 A EP 97119983A EP 0916492 B1 EP0916492 B1 EP 0916492B1
Authority
EP
European Patent Office
Prior art keywords
dispensing
branches
bar
channels
holes
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
EP97119983A
Other languages
German (de)
English (en)
Other versions
EP0916492A1 (fr
Inventor
Marco Corti
Riccardo Fumagalli
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.)
FINELETTRA INTERNATIONAL S.A.
Original Assignee
Elettra Srl
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 Elettra Srl filed Critical Elettra Srl
Priority to DE69706868T priority Critical patent/DE69706868T2/de
Priority to AT97119983T priority patent/ATE205783T1/de
Priority to ES97119983T priority patent/ES2161407T3/es
Priority to DK97119983T priority patent/DK0916492T3/da
Priority to EP97119983A priority patent/EP0916492B1/fr
Publication of EP0916492A1 publication Critical patent/EP0916492A1/fr
Application granted granted Critical
Publication of EP0916492B1 publication Critical patent/EP0916492B1/fr
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
    • B41F35/00—Cleaning arrangements or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/24—Wiping devices using rolls of cleaning cloth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/26—Spraying devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/30—Recovering used solvents or residues
    • B41P2235/31—Recovering used solvents or residues by filtering

Definitions

  • the present invention relates to apparatuses for automatically cleaning the inking rollers and the natural-rubber covered cylinders of printing machines, hereinafter referred to as "rubber-covered cylinders", as described in Italian patents Nos. 1 257 766 and 1 257 769, application No. BO95A000432 (now patent No. 1 279 630, published on 14 March 1997) and European patent application EP 0 636 476.
  • Document EP 0 636 476 A discloses an apparatus for dispensing fluids for cleaning the surface of rubber-covered cylinders and inking rollers of printing machines, of the type that comprises at least one row of means for dispensing the said fluids, said row being parallel to the surface to be cleaned and said dispensing means being located on a dispensing bar having transverse dispensing holes which convey the fluid to the said dispensing means and are in turn connected to channels obtained along one face of the said bar and closed by sealing means so as to form ducts.
  • Document US 4 540 445 A discloses an apparatus for cleaning gripper assemblies on printing presses in which a single duct for the cleaning fluid is subdivided with "Y" shaped branches and in which each branch deriving from the said subdivision feeds a plurality of dispensing nozzles arranged in series.
  • Document GB 569 446 A discloses an apparatus for applying ink to the design cylinder of a rotary printing press of the type that comprises at least one row of openings for dispensing the ink, said row being parallel to the surface of the cylinder and said openings being located on a dispensing bar and connected to ducts connected in turn to other feed ducts which are arranged in parallel to each other, come together at forks and gradually decrease in number until they join up with a single fluid feed duct.
  • Document DE 196 19 143 A discloses an apparatus for cleaning the surface of cylinders of printing machines which employs a felt pad is impregnated with the cleaning fluid and which can be brought in contact with the cleaning cloth.
  • an apparatus for dispensing fluids for cleaning the surface of rubber-covered cylinders and inking rollers of printing machines in which said cleaning fluids consist of a mixture of liquid and air.
  • the apparatus comprises at least one row of means for dispensing the said fluids, said row being parallel to the surface to be cleaned and said dispensing means being located on a dispensing bar having transverse dispensing holes which convey the fluid to the said dispensing means and are in turn connected to channels obtained along one face of the said bar and closed by sealing means so as to form ducts, these channels being connected to other feed channels which are arranged in parallel to each other, come together at forks and gradually decrease in number until they join up with a single fluid feed duct.
  • each fork in the said channels is essentially "Y"-shaped, i.e. with one leg and two diverging branches and is realized, as regards its leg part before the branching-off point, along a rectilinear path, and (b) the total number of forks is such that each dispensing hole is fed by a single final branch.
  • porous inserts to the dispensing holes instead of the usual nozzles, these inserts coming into direct contact with the cloth for cleaning the rubber-covered cylinders.
  • the same bar 1 also houses the pneumatic actuators 6 which, on command, push the presser element 4, 5 against the cylinder 2 so as to bring the latter into contact with the intermediate cloth 7 onto which cleaning fluids are sprayed by nozzles 9 mounted in one or more seats 8 formed in that side of the bar that faces the cloth.
  • These nozzles connect up, via holes 10, with channels 1000 milled along a flat face of the said bar on which a gasket 12 is then placed and a covering means 13 fixed by means of screws 14, thereby turning the said channels into proper ducts.
  • These channels are symmetrically connected to other feed conduits which are arranged in circuits flowing parallel to each other, come together at forks and gradually decrease in number until they join up with a single fluid feed duct 15 located at one end of the bar 1.
  • each fork in the said channels is essentially "Y"-shaped and occurs in a straight section of duct, and that the channels produced by the fork are structured such that they offer essentially the same degree of resistance to the passage of the fluids, so that the latter split into flows of essentially equal volume at each fork in the duct.
  • the number of forks is such that each terminal channel is of limited length and feeds a limited number of nozzles 9.
  • the terminal channels fed three nozzles in series.
  • the channels continue to fork until each terminal channel produced by a fork feeds a single nozzle, in order to ensure an even more uniform distribution of the cleaning fluids to the various nozzles of the apparatus.
  • the reference numeral 15 denotes the duct located at one end of the bar and connected to the cleaning fluid delivery system.
  • the cleaning fluid consists of a mixture of a suitable cleaning liquid and air.
  • the duct 15 communicates, via the perpendicular hole 16, with a first channel 100 formed longitudinally in the bar 1 and which, before it reaches the middle 18 of the bar, forks at B1 into two opposite straight ducts 101, 201 which, before they reach the middle of each respective half-bar, fork at B2 and B3 respectively, forming corresponding pairs of identical, mutually aligned ducts 102, 202 and 103, 203 which in turn fork at B4, B5 and B6, B7 respectively forming pairs of ducts 104, 204, 105, 205 and 106, 206, 107, 207 which then fork again, for the last time, at B8, B9, B10, B11 and B12, B13, B14, B15 respectively, which, via their respective conduit
  • each main channel Following each main channel are two initially straight channels located a short distance from each other and parallel to and equidistant from the channel upstream.
  • the common wall via which the channels formed by each fork join up with the channel upstream has a "V" shape when viewed from above and has a sharp point.
  • the two arms that follow each fork one has a "Z” or “S” shape, and the other a “U” or “C” shape, as may be seen in the appended drawings.
  • the reference numeral 26 denotes straight milled portions formed in the base of the conduit 11 which carries the channels for conveying the cleaning liquids. These milled portions contain the threaded blind holes 114 in which the screws 14 engage in order to screw down the components 12, 13 which define the said channels according to the known art (Fig. 1).
  • each fork is of appropriate depth and width, as may be seen in Figure 1.
  • the initial conduit 100 is approximately 10mm deep and approximately 5 mm wide, while the arms of the final forks are approximately 3 mm wide and approximately 2.5 mm deep.
  • the bar illustrated in Figures 3 and 3a actually has twenty-four nozzles supplied by channels containing fifteen forks, essentially as in the previous bar except that the final forks subsequently split into three-way branches T1, T2, T3, T4, T5, T6, T7, T8, immediately after their straight sections, as illustrated in the detail shown in Figure 4.
  • These branches are symmetrically and centrally positioned relative to the fork, with one arm having an "S” or “Z” shape, one having a "U” or “C” shape and the intermediate arm having a rounded "L” shape, each of the three arms feeding the hole 10 of one nozzle 9.
  • Figure 5 illustrates how, in the variant embodiment of Figures 3 and 3a, the channels for conveying the cleaning fluids also have differing widths and depths in order to compensate for losses in pressure.
  • the initial ducts are, for example, 4 mm wide and 8 mm deep. After the first fork their width goes down to 3 mm and their depth to 6 mm. After the next fork their width remains the same but their depth is reduced to 3 mm. At the next fork their depth remains the same but their width is reduced to 2 mm. The arms of the final fork are 2.5 mm deep and this depth, and the width of 2 mm, remain unchanged to the end.
  • the nozzles 9 can be replaced by a straight pad 70, made of any suitable porous material, housed in a straight recess 71 formed in the active face of the bar 1, parallel to the recess 3.
  • a small continuous chamber 72 which acts as a reservoir and into which the holes 10 for dispensing the cleaning fluid open.
  • the pad 70 may advantageously be formed by a plurality of inserts 70' which have the same dimensions and are identical to each other, except for the end inserts 70" which have one rounded end so that they can fit in a leaktight manner into the corresponding ends of the recess 71 (Fig. 8).
  • the inserts 70', 70" are held in the recess 71 by suitable means so that, if need be, they can be easily removed, for example so that they can be cleaned or replaced periodically.
  • the inserts 70', 70" are dimensioned such that they can be inserted very accurately into the recess 71 and present a longitudinal bore 73 through which a retaining rod 74 passes, which also passes through bores formed in the ends of bar 1, the threaded ends of the said retaining rod being fixed to the ends of the bar by means of nuts 75.
  • Figure 6 shows that the pad 70 is preferably positioned so that its face is in view and lies in the same plane as the wall of the bar 1 which comes into contact with the cloth 7 when the presser element 4, 5 is in the retracted rest position.
  • the liquid to be sprayed is fed via the holes 10 into the small reservoir 72 from which it is fed to the pad 70 which uniformly wets the cloth 7.
  • the cloth 7 is preferably stationary. Once the liquid has been dispensed, the cloth 7 is moved until its wetted part is in front of the presser element 4, 5 which is then activated, as shown in Figure 7, so as to clean the rubber-covered roller 2.

Landscapes

  • Nozzles (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Cleaning In General (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Detergent Compositions (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (12)

  1. Dispositif destiné à distribuer des fluides en vue de nettoyer la surface de cylindres recouverts de caoutchouc (2) et encrer des rouleaux de machines d'impression, lesdits fluides de nettoyage étant constitués d'un mélange de liquide et d'air, du type qui comprend au moins une rangée de moyens (9) destinés à distribuer lesdits fluides, ladite rangée étant parallèle à la surface à nettoyer et lesdits moyens de distribution (9) étant situés sur une barre de distribution (1) comportant des trous de distribution transversaux (10) qui acheminent le fluide vers lesdits moyens de distribution et sont reliés à leur tour à des canaux obtenus le long d'une face de ladite barre et refermés par des moyens d'étanchéité (12, 13) de façon à former des conduits, ces canaux étant reliés à d'autres canaux d'alimentation qui sont disposés parallèlement les uns aux autres, arrivent ensemble à des fourches, et diminuent progressivement en nombre jusqu'à ce qu'ils rejoignent un seul conduit d'alimentation de fluide (15),
       caractérisé par le fait que
    - chaque fourche desdits canaux est essentiellement en forme de "Y", c'est-à-dire avec un pied long et deux branches divergentes et est réalisé dans sa partie de pied avant le point de séparation, le long d'un trajet rectiligne, et
    - le nombre total des fourches est tel que chaque trou de distribution (10) est alimenté par une seule branche finale.
  2. Dispositif selon la revendication 1), caractérisé en ce que chacune des deux branches divergentes (B8, B9, B10, B11, B12, B13, B14, B15) des fourches finales se ramifie en un groupe composé de trois branches (T1, T2, T3, T4, T5, T6, T7, T8) dont chacune alimente un trou de distribution (10).
  3. Dispositif selon la revendication 2), dans lequel une paroi de division est ménagée dans la partie rectiligne du conduit avant le point de séparation en alignement avec le point milieu de la branche centrale du groupe de trois branches (T1, T2, T3, T4, T5, T6, T7, T8) et ces trois branches sont de même largeur que chaque partie du conduit divisé par la paroi de division.
  4. Dispositif selon la revendication 2), dans lequel les trous de distribution (10) présentent un diamètre qui est supérieur à la largeur de chaque branche du groupe de trois branches.
  5. Dispositif selon la revendication 4), dans lequel le trou de distribution (10) de la branche centrale du groupe de trois branches (T1, T2, T3, T4, T5, T6, T7, T8) est coaxial à ladite branche centrale, alors que les trous de distribution des branches extérieures sont positionnés de manière à ce que leur circonférence soit située tangentiellement par rapport auxdites branches extérieures.
  6. Dispositif selon les revendications précédentes,
    caractérisé en ce que, de manière à compenser des pertes de pression résultant des diverses branches et de la largeur générale accrue des canaux destinés à acheminer les fluides de nettoyage, la profondeur de ces canaux diminue progressivement dans la direction des trous de distribution terminaux (10).
  7. Dispositif selon la revendication 1), dans lequel la profondeur des fourches finales est approximativement de 2,5 mm et leur largeur est approximativement de 3 mm, identiques à celles des trous (10) destinés à alimenter les buses.
  8. Dispositif selon la revendication 2), dans lequel la profondeur des branches à trois voies finales est approximativement de 2,5 mm et leur largeur est approximativement de 2 mm, alors que les trous de distribution (10) qui sont reliés à ces branches sont approximativement d'une largeur de 3 mm.
  9. Dispositif selon les revendications précédentes, dans lequel les trous (10) qui distribuent finalement les fluides de nettoyage sont reliés à une chambre droite (72) qui agit comme réservoir et s'ouvre à la base d'un creux droit (71) dans la barre de distribution, formé parallèlement au creux (3) logeant l'élément presseur (4, 5) et entrant en contact avec un tampon (70) fait d'un matériau poreux approprié quelconque qui est perméable auxdits fluides de nettoyage, dont une face est en contact transversal avec le tissu de nettoyage (7) lorsque ledit élément presseur est à la position de repos rétractée, de sorte que le fluide distribué par lesdits trous (10) passe au travers dudit tampon et humidifie uniformément le tissu.
  10. Dispositif selon la revendication 9), dans lequel la face du tampon poreux est en vue et est située essentiellement dans le même plan que la surface de la barre de distribution (1) avec laquelle le tissu de nettoyage (7) vient en contact et sur laquelle il glisse lorsque l'élément presseur (4, 5) est à la position de repos rétractée.
  11. Dispositif selon la revendication 9, dans lequel le tampon poreux est formé d'une pluralité de pièces rapportées (70') placées à proximité les unes des autres et présentant les mêmes dimensions, à l'exception des pièces rapportées d'extrémité (70'') qui s'engagent dans des extrémités arrondies correspondantes du creux du logement (71).
  12. Dispositif selon la revendication 11), dans lequel les pièces rapportées qui constituent le tampon poreux sont munies d'au moins un alésage traversant (73) et comportent une petite tige de retenue (74) qui passe au travers de celles-ci et passe également au travers d'alésages d'extrémité formés dans la barre de distribution (1), les extrémités filetées de ladite tige de retenue étant fixées à la barre avec des écrous (75).
EP97119983A 1997-11-14 1997-11-14 Dispositif d'alimentation du produit de nettoyage liquide Expired - Lifetime EP0916492B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE69706868T DE69706868T2 (de) 1997-11-14 1997-11-14 Vorrichtung zum Zuführen von flüssigem Reinigungsmittel
AT97119983T ATE205783T1 (de) 1997-11-14 1997-11-14 Vorrichtung zum zuführen von flüssigem reinigungsmittel
ES97119983T ES2161407T3 (es) 1997-11-14 1997-11-14 Dispositivo para el suministro de un producto de limpieza liquido.
DK97119983T DK0916492T3 (da) 1997-11-14 1997-11-14 Anordning til forsyning af væskeformigt rengøringsmiddel
EP97119983A EP0916492B1 (fr) 1997-11-14 1997-11-14 Dispositif d'alimentation du produit de nettoyage liquide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97119983A EP0916492B1 (fr) 1997-11-14 1997-11-14 Dispositif d'alimentation du produit de nettoyage liquide

Publications (2)

Publication Number Publication Date
EP0916492A1 EP0916492A1 (fr) 1999-05-19
EP0916492B1 true EP0916492B1 (fr) 2001-09-19

Family

ID=8227619

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119983A Expired - Lifetime EP0916492B1 (fr) 1997-11-14 1997-11-14 Dispositif d'alimentation du produit de nettoyage liquide

Country Status (5)

Country Link
EP (1) EP0916492B1 (fr)
AT (1) ATE205783T1 (fr)
DE (1) DE69706868T2 (fr)
DK (1) DK0916492T3 (fr)
ES (1) ES2161407T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10000555A1 (de) * 2000-01-08 2001-07-12 Baldwin Grafotec Gmbh Waschbalken für Druckmaschinenzylinder
DE10000549A1 (de) * 2000-01-08 2001-07-12 Baldwin Grafotec Gmbh Waschbalken für Druckmaschinenzylinder
IT1320895B1 (it) * 2000-02-25 2003-12-10 Marco Corti Barra per l'erogazione di miscela fluida detergente negli apparatiper la pulitura automatica dei cilindri delle macchine da stampa
IT1321266B1 (it) * 2000-05-19 2004-01-08 Marco Corti Metodo e dispositivo a spazzola rotante per la pulizia dei cilindridelle macchine da stampa.
IT1321267B1 (it) * 2000-05-19 2004-01-08 Marco Corti Metodo e dispositivo per la pulitura dei cilindri in caucciu' dellemacchine da stampa, particolarmente del tipo cosiddette a bobina.
DE502005007747D1 (de) * 2005-05-02 2009-09-03 Baldwin Oxy Dry Gmbh Reinigungssystem für Zylinderoberflächen einer Druckmaschine
DE102006035988B4 (de) * 2006-08-02 2008-05-21 Technotrans Ag Vorrichtung zur Reinigung der Oberflächen von Druckzylindern

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB569446A (en) * 1942-10-14 1945-05-24 Goss Printing Press Co Ltd Improvements in or relating to ink-applying means for rotary printing presses
IT1279630B1 (it) * 1995-09-14 1997-12-16 Elettra Srl Apparato per la pulitura automatica dei cilindri in caucciu' delle macchine da stampa

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525982A (en) * 1948-04-27 1950-10-17 Addressograph Multigraph Apparatus for cleaning printing surfaces in offset printing machines
US4540445A (en) * 1984-06-27 1985-09-10 Burns Jr William P Method and apparatus for cleaning gripper assemblies
IT1264177B1 (it) * 1993-07-27 1996-09-23 Elettra Srl Pressore per la pulitura del cilindro rivestito in gomma delle macchine da stampa.
DE19619143B4 (de) * 1996-05-11 2005-03-17 Heidelberger Druckmaschinen Ag Vorrichtung zum Reinigen von Zylindermantelflächen in Rotationsdruckmaschinen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB569446A (en) * 1942-10-14 1945-05-24 Goss Printing Press Co Ltd Improvements in or relating to ink-applying means for rotary printing presses
IT1279630B1 (it) * 1995-09-14 1997-12-16 Elettra Srl Apparato per la pulitura automatica dei cilindri in caucciu' delle macchine da stampa

Also Published As

Publication number Publication date
EP0916492A1 (fr) 1999-05-19
ES2161407T3 (es) 2001-12-01
DK0916492T3 (da) 2001-10-29
ATE205783T1 (de) 2001-10-15
DE69706868T2 (de) 2002-04-11
DE69706868D1 (de) 2001-10-25

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