EP0613421A1 - Procede et appareil pour nettoyer automatiquement des rouleaux et en particulier des cylindres porte-blanchet et des cylindres a contre-pression. - Google Patents

Procede et appareil pour nettoyer automatiquement des rouleaux et en particulier des cylindres porte-blanchet et des cylindres a contre-pression.

Info

Publication number
EP0613421A1
EP0613421A1 EP92922744A EP92922744A EP0613421A1 EP 0613421 A1 EP0613421 A1 EP 0613421A1 EP 92922744 A EP92922744 A EP 92922744A EP 92922744 A EP92922744 A EP 92922744A EP 0613421 A1 EP0613421 A1 EP 0613421A1
Authority
EP
European Patent Office
Prior art keywords
roller
reeling
cleaning
web
pressure pad
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.)
Granted
Application number
EP92922744A
Other languages
German (de)
English (en)
Other versions
EP0613421B1 (fr
Inventor
Birger Hansson
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.)
Jimek International AB
Original Assignee
Jimek International AB
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 Jimek International AB filed Critical Jimek International AB
Publication of EP0613421A1 publication Critical patent/EP0613421A1/fr
Application granted granted Critical
Publication of EP0613421B1 publication Critical patent/EP0613421B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B41P2235/246—Pressing the cleaning cloth against the cylinder

Definitions

  • the present invention relates to apparatus and to a method for automatically cleaning rollers, particularly blanket cylinders and counter-pressure cylinders in printing machines.
  • the paper web to be printed is taken from a feed roller and passed through the actual printing press, which comprises one or more printing or impression cylinders, where the paper to be printed is printed on one or both sides thereof and which paper, when printing is completed, passes over one or more guide rollers to a folding device, where the printed paper web is cut and folded.
  • the blanket cylin ⁇ ders are normally clothed with a rubber material or some other polymeric material. The two long sides of the blanket material are normally secured in a groove which extends in the longitudinal direction of respective impression cylinders.
  • the printed paper deposits ink and paper fibres (lint) on the blanket, successively as printing continues.
  • ink and paper-fibre deposits must be removed from the blanket at regular intervals in order a) to prevent pleating or wrinkling of the paper web, b) to prevent the deposits from transferring to the paper web, and c) to prevent faulty web-registration or alignment of the web with the impression cylinders, and impaired quality of the print produced.
  • the longitudinal attachment groove extends along the cylin- drical surface of the blanket.
  • Many different methods of cleaning impression cylinders manually are known to the art. For instance, the deposits can be removed by scrap ⁇ ing clean the press cylinders, subsequent to having removed the paper web, either with or without the addi ⁇ tion of a cleaning agent. This cleaning method is labo- rious, slow and highly expensive.
  • the object of the present invention is to provide an apparatus and a method for cleaning the blankets of impression cylinders which will avoid the aforesaid problems and which will enable blanket cylinders to be cleaned several times more quickly, more positively and more effectively than can be achieved with hitherto known manually-operated apparatus and methods.
  • Figure 1 illustrates schematically and in perspective an impression cylinder 1 fitted with a blanket 2 and pro ⁇ vided with a groove 2B by means of which the blanket is secured to the cylinder 1, and an apparatus 3 for auto ⁇ matically cleaning the blanket in accordance with a first embodiment of the present application.
  • Figure 2 is a side view of the cleaning apparatus 3.
  • Figure 3 is a top view, partly in section, of the clean- ing apparatus 3, shown in Figure 1.
  • Figure 4 is a sectioned side view of the cleaning appa ⁇ ratus 3 and shows the apparatus in a rearward or re ⁇ tracted position in which the reeling-off roller 6 is almost fully wound with cleaning material 9.
  • Figure 5 is a sectioned side view of the cleaning appa ⁇ ratus 3 and shows the apparatus in a forward position in which the reeling-off roller is almost empty of cleaning material 9.
  • Figure 6 is a side, section view of a first embodiment of the pressure pad 11 and its holder 14.
  • the holder 14 is configured such that when viewed in section the holder consists of a beam or bar of general- ly rectangular cross-section.
  • the pressure pad 11 has a uniform thickness and is fastened to the holder 14 over the whole of its surface.
  • Figure 7 is a side view in section of a second embodi- ment of the pressure pad 11 and its holder 14.
  • This holder 14 also has the form of a beam or bar of general ⁇ ly rectangular cross-section.
  • the beam has attached thereto two spacer elements each of which presents two narrow, elongated raised portions.
  • the pressure pad 14 comprises a cloth of uniform thickness which is stretched over the raised portions.
  • Figure 8 is a side view in section of a third embodiment of the pressure pad 11 and its holder 14. This embodi- ment is similar to the embodiment illustrated in Figure 6, but with the difference that the pressure pad 11 in this case comprises a cloth of uniform thickness.
  • Figure 9 is a side view in section of a fourth embodi- ment of the pressure pad 11 and its holder 14.
  • that part of the holder 14 which faces towards the cylinder 1 comprises a flat surface to which the pres ⁇ sure pad 11 is secured.
  • That surface of the pressure pad 11 which faces the cylinder 1 is preshaped in a manner to present substantially the same radius of curvature as the cylinder 1.
  • Figure 10 is a side view in section of a fifth embodi ⁇ ment of the pressure pad 11 and its holder 14.
  • That part of the holder 14 which faces towards the cylinder 1 also in this case comprises a flat surface to which the pressure pad 11 is secured.
  • the pressure pad 11 compris ⁇ es a plate of uniform thickness and that part of the plate which faces the roller 1 is bevelled, among other things, to facilitate feeding of the cleaning web 9.
  • Figures 11-15 illustrate schematically a first drive means 20 which drives the reeling-off roller 6 and a second drive means 21 which drives the reeling-on roller 7, intended for an alternative embodiment of the clean ⁇ ing apparatus 3.
  • Figures 16-19 illustrate schematically a first axle lock for the reeling-off cylinder 6, and a second axle lock 43 for the reeling-on roller 7.
  • a first embodiment of the cleaning apparatus comprises one or more side mem ⁇ bers 5, which may or may not be housed in a housing 4, a reeling-off roller 6 and a reeling-on roller 7 which is driven by a rotatable cylinder 16, wherein the roller 6 and the roller 7 are each provided with a disengagable reverse stop 8A and 8B.
  • the cleaning apparatus 3 has no housing 4.
  • the cleaning apparatus 3 is constructed so that it can be mounted adjacent an impression cylinder 1 in a de ⁇ sired manner.
  • the cleaning apparatus 3 will function efficiently irrespective of its orientation in space.
  • Wound on the reeling-off roller 6 is a web of cleaning material 9 , which may consist of paper, non-woven fab- ric, felt or some other highly absorbent material.
  • the web 9 runs from the reeling-off roller 6 over a pressure pad 11 and from there optionally over one or more guide rollers 10, and is finally wound onto the reeling-up roller 7. Only one guide roller 10 is shown in the Figure ⁇ 4 and 5.
  • a spray device 12 Located between the reeling-off roller 6 and the pressure pad 11 is a spray device 12 which is used to spray the cleaning web 9 with a cleaning agent 13.
  • This cleaning agent will preferably have properties which prevent it from weakening the cleaning web to any considerable extent and may, for instance, consist of a mixture of mineral oil fraction, which constitutes a solvent for a number of printing inks, and water, which dissolves paper fibres.
  • the pressure pad 11 is preferably made of a foamed, closed-cell polymeric material and is fastened to a holder 14.
  • the pressure pad 11 and the holder 14 may have several different configurations, of which five preferred embodiments are disclosed in the above de ⁇ scriptions of Figures 6-10.
  • the holder 14 may have the form of a beam or bar of generally circular cross-section, and the pressure pad 11 has the form of a thin plate, which is attached to the holder.
  • the holder 14 is mounted so that it can either rotate or remain stationary.
  • the holder 14 is at ⁇ tached to a compressed-air piston 15 which is able to move the holder 14 linearly towards and away from the impression cylinder 1.
  • the reeling-off roller 6 is provided with a disengagable reverse stop 8A, which prevents the reeling-off roller 6 from rotating in the direction in which the cleaning web 9 is reeled-off from the reeling-off roller 6, i.e. an anti-clockwise direc ⁇ tion as seen in the Figures.
  • the reeling-on roller 7 is provided with a disengagable reverse stop 8B, which prevents rotation in the direction in which the cleaning web 9 arrives, i.e.
  • an alternative embodi ⁇ ment of the inventive cleaning apparatus 3 is character- ized in that the apparatus lacks the aforesaid rotary cylinder 16; in that the reeling-off cylinder 6 is driven by a first drive means 20; in that the reeling-on roller 7 is driven by a second drive means 21; in that the drive means 20 and 21 are constructed advantageously so that each of said drive means can drive in solely one direction of rotation and in that the driving function of said means is not dependent on friction between the components of the cleaning apparatus 3; and in that each of the first and the second drive means 20 and 21 in- elude an engagable and disengagable toothed ring 29 which is mounted, by means of a free hub 30, to one end of the reeling-off roller 6 and to one end of the reel ⁇ ing-on roller 7 respectively, said end preferably being opposed to said one end of the reeling-off roller 6 and is caused to rotate in one direction or the other with the aid of a rack 31; and in that respective rack
  • a further exemplifying embodiment of the inventive cleaning apparatus 3 is characterized in that the reel ⁇ ing-off roller 6 is provided with a first pulse emitter 22 (not shown in detail); in that the reeling-on roller 7 is provided with a second pulse emitter 23 (not shown in detail), wherein both pulse emitters 22 and 23 deliv ⁇ er a number of pulses which is proportional to the rotation of respective rollers 6 and 7; in that the arrangement is provided with means 24 (not shown in detail) for processing said pulses in a manner such as to enable information to be obtained continuously with regard to the length of cleaning web 9 that is advanced on each occasion and with regard to the length of clean ⁇ ing web 9 that remains on the reeling-off roller 6; and in that the pulse-processing means 24 is constructed to monitor continuously the length, or amount, of paper web 9 that is transferred between the reeling-off roller 6 and the reeling-on roller 7.
  • the spray device 12 includes a chamber 50, preferably made of a polymeric material, which can be expanded by means of compressed-air or liquid-pressure and which, with the aid of means for controlling the compressed-air or liquid-pressure, is used to drive out the liquid delivered to the spray device 12.
  • a further alternative embodiment of the inventive cleaning apparatus 3 is characterized in that one end of the reeling-off roller 6 is provided with a number of recesses or notches 32 (not shown in detail) and that mounted on this end of the roller 6 is a spring-loaded rotation-blocking device 34 which is provided with an end-hook 33.
  • the device 34 slides against the web 9 wound on the reeling-off roller 6 and a small length of that end of the web 9 which lies nearest the roller 6 is cut obliquely, above the region of the rotation-blocking device 34, so that the width of said web will not extend beyond said device 34, wherein the device 34 will come into engagement with the outer, bare surface of the roller 6 immediately the obliquely cut end of the web begins to pass the device 34, where ⁇ upon the end-hook 33 engages in the recesses or notches 32 in a manner to lock the reeling-off roller 6 against rotation.
  • a further alterna ⁇ tive embodiment of the inventive cleaning apparatus 3 is characterized by a first axle lock 35 which functions to lock the axle of the reeling-off roller 6 and which has the following construction:
  • one end of the reeling-off roller 6 has the form of a rectangular shoulder 36 of generally uniform thickness
  • the side member 5 against which the aforesaid end of the reeling-off roller 6 is intended to lie is provided with a shaft 44 whose end which faces the roller 6 is provided with a flange 45 around which there is mounted a rotatable locking ring 37 which is provided with a groove 38 corresponding to the shoulder 36 and the twisting of which in the direction of rotation is limit ⁇ ed by a stop screw 39;
  • a journalled locking pin 40 which is biassed by a spring means 41 so as to strive to move in a direction towards the centre of the locking ring 37, from an outer position to an inner position, wherein the locking pin 40 is construct ⁇ ed and fitted so that the pin is moved to its inner position by the spring means 41 when, and only when, the shoulder 36 is correctly inserted in the groove 38, and which pin otherwise remains in its outer position, and wherein movement of the locking ring 37 in the rotation ⁇ al direction is restricted due to the inability of the locking pin 40 to pass a stop abutment 42; and
  • axle lock 35 is therewith so constructed that when an attempt is made to rotate the reeling-off roller 6 with the locking pin 40 located in its outer position, the locking pin 40 is moved into engagement with the stop abutment 42 so as to obstruct said rotation, where ⁇ in the pulse-processing means 24 is unable to deliver acceptable signals which would result in continued operation of the arrangement, and wherein the arrange- ment is provided with a second axle lock 43 for locking the reeling-on roller 7, the construction being the same as the construction of the first axle lock 35.
  • the flange 45 has a profiled surface section 37 (not shown in detail), for instance a corrugated or serrated surface, and in that the arrangement is provided, preferably on the side members 5, with safety pins 25 which coact with springs 26, the arrangement being such that respective springs 26 strive to move the safety pin 25 towards said profiled surface section 27; when the arrangement is running smoothly, respective springs 26 are held with the aid of compressed-air in a position such as to prevent the safety pin 25 from lying against the profiled surface section 27; when the delivery of compressed-air stops, in accor ⁇ dance with the aforegoing, the spring 26 moves the safety pin 25 into engagement with the profiled surface section 27; - compressed-air is delivered via an active valve 28 which requires a continuous input signal in order to be held open; when this input signal is interrupted, the delivery of compressed-air also ceases, in addition to such stoppages being caused by disturbances in the compres ⁇ sed-air delivery system; and such that
  • said input signal is generated by the pulse-process ⁇ ing means 24 when, and only when, said pulse-processing means 24 fails to detect faulty running of the arrange- ment.
  • FIG. 1 Another alternative embodiment of the inventive cleaning apparatus 3 is characterized in that the housing 4 and/or the side members 5 are constructed so as to form parts of means connected thereto.
  • the inventive apparatus may include a web- degreasing bath 19.
  • the bath 19 can be placed at various positions in the appa ⁇ ratus, preferably between the pressure pad 11 and the reeling-up roller 7, so that the web 9 will subsequently pass through the bath 19.
  • the first mentioned embodiment of the inventive cleaning apparatus 3 is used in accordance with the following method steps: 1) The rear surface of the cleaning web 9 is sprayed with cleaning agent 13, by means of the spray device 12, over that length of web which is located between the reeling-off roller 6 and the pressure pad 11. The clean- ing agent 13 will then quickly penetrate the web 9.
  • Step 1) may be repeated during some part of this cleaning step, i.e. the sur ⁇ face of the cleaning web may again be sprayed with cleaning agent 13 by the spray device 12, over that web- part which is located between the reeling-off roller 6 and the pressure pad 11. Cleaning of the blanket during step 4) can thus be achieved with a dry cleaning web 9 or with a web that has been sprayed with cleaning agent.
  • Step 3) is repeated, i.e. the piston 15 is retracted and the holder 14 therewith returned to its rearward position.
  • the rotational cylinder 16 is activated to rotate the reeling-on roller 7 anti-clockwise.
  • that part of the web 9 which has been wetted with cleaning agent is drawn over the pressure pad 11 while, at the same time, the soiled part of the web 9 is drawn away from the pressure pad 11 and later reeled onto the reeling-on roller 7.
  • Steps 4) and 5) are repeated as often as is required in order for the blanket 2 to be cleaned satisfactorily.
  • cleaning web 9 used to clean the blanket is not unduly dirty and thus can be reused, such relatively unsoiled parts of the cleaning web 9 can be rewound onto the reeling-off roller 6, prior to carrying out step 1).
  • the blanket cleaning operation will in ⁇ clude the following steps:
  • the blanket-cleaning process is continued until the blanket 2 is satisfactorily cleaned, either by moist or wet cleaning of the blanket, i.e. by repeating steps l)-5) above, or by dry-cleaning the blanket, i.e. by re- peating steps 2)-5) above, or by alternating between moist cleaning and dry cleaning of the blanket.
  • the inventive apparatus and the inventive method can also be applied for cleaning counter-pressure cylinders, i.e. large cylinders which are not blanketed, such cylinders being used in satellite printers and multi ⁇ colour printers.

Landscapes

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

Abstract

L'invention concerne un appareil (3) et un procédé pour nettoyer automatiquement des rouleaux et en particulier des cylindres d'imprimerie (1) du type cylindre porte-blanchet (2) ou cylindre à contre-pression. L'appareil (3) comprend un rouleau de déroulement (6) et un rouleau d'enroulement (7). Le rouleau (6) porte une bande nettoyante (9) qui part du rouleau (6), passe sur un coussinet de pression (11) fixé sur un support (14) et ensuite vers le rouleau d'enroulement (7), éventuellement par l'intermédiaire d'un ou de plusieurs rouleaux de guidage (10). Entre le rouleau de déroulement (6) et le coussinet de pression (11), il y a un dispositif d'aspersion (12) qui amène un agent de nettoyage (13) à la bande. Le support (14) est fixé à un piston d'air comprimé (15) qui peut déplacer le support (14) vers l'arrière et vers l'avant, c'est-à-dire dans la direction dy cylindre d'impression (1) et dans la direction opposée. Durant ce mouvement de va-et-vient, la bande nettoyante (9) est déplacée progressivement depuis le rouleau de déroulement (6) vers le rouleau d'enroulement (7) en passant sur le coussinet de pression (11).
EP92922744A 1992-09-18 1992-09-18 Procede et appareil pour nettoyer automatiquement des rouleaux et en particulier des cylindres porte-blanchet et des cylindres a contre-pression Expired - Lifetime EP0613421B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1992/000643 WO1994006633A1 (fr) 1992-09-18 1992-09-18 Procede et appareil pour nettoyer automatiquement des rouleaux et en particulier des cylindres porte-blanchet et des cylindres a contre-pression

Publications (2)

Publication Number Publication Date
EP0613421A1 true EP0613421A1 (fr) 1994-09-07
EP0613421B1 EP0613421B1 (fr) 1997-01-22

Family

ID=20385495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92922744A Expired - Lifetime EP0613421B1 (fr) 1992-09-18 1992-09-18 Procede et appareil pour nettoyer automatiquement des rouleaux et en particulier des cylindres porte-blanchet et des cylindres a contre-pression

Country Status (5)

Country Link
EP (1) EP0613421B1 (fr)
AU (1) AU2893392A (fr)
DE (1) DE69217079T2 (fr)
SE (1) SE469884B (fr)
WO (1) WO1994006633A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718996B1 (fr) * 1994-04-26 1997-07-04 Heidelberger Druckmasch Ag Procédé de lavage de l'enveloppe d'un cylindre d'une machine rotative à imprimer.
EP0730960A3 (fr) * 1995-03-09 1997-07-09 Baldwin Graphic System Inc Procédé et système pour déterminer la fin d'un rouleau de matière textile destiné à être utilisé dans un dispositif de nettoyage d'un cylindre dans une machine d'impression
CN1096942C (zh) 1995-05-01 2002-12-25 鲍德温·格拉菲克系统有限公司 就地浸渍和印刷机上浸渍清洁系统及其使用方法
JP3655358B2 (ja) * 1995-07-11 2005-06-02 株式会社小森コーポレーション 印刷機のシリンダ洗浄装置
JP3023421B2 (ja) * 1997-02-19 2000-03-21 日本ボールドウィン株式会社 シリンダ洗浄装置および洗浄方法
DE19937084A1 (de) * 1999-08-06 2001-02-08 Koenig & Bauer Ag Zylinderwascheinrichtung
DE19948166C1 (de) * 1999-10-07 2001-01-18 Kocher & Beck Gmbh & Co Rotati Gegenprägezylinder für eine Etikettendruckmaschine und Verfahren zu seiner Herstellung
DE10000554A1 (de) * 2000-01-08 2001-07-12 Baldwin Grafotec Gmbh Waschanlage für Druckmaschinenzylinder
CN105109204B (zh) * 2015-10-15 2017-06-13 宁波久源润滑设备制造有限公司 一种刚性变位机构及具有该机构的胶印机滚筒表面清洗器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6416657A (en) * 1987-07-10 1989-01-20 Baldwin Nippon Kk Pressure pad in cylinder cleaner for press
EP0334173B1 (fr) * 1988-03-23 1993-01-07 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Dispositif pour nettoyer les surfaces de travail d'une machine, en particulier d'une machine d'imprimerie
DE3909119C2 (de) * 1989-03-20 1997-01-23 Heidelberger Druckmasch Ag Wascheinrichtung für eine Druckmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9406633A1 *

Also Published As

Publication number Publication date
WO1994006633A1 (fr) 1994-03-31
EP0613421B1 (fr) 1997-01-22
AU2893392A (en) 1994-04-12
SE469884B (sv) 1993-10-04
DE69217079D1 (de) 1997-03-06
SE9100832L (sv) 1992-09-20
DE69217079T2 (de) 1997-05-22
SE9100832D0 (sv) 1991-03-19

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