EP0816078B1 - A method and device for cleaning guide rollers in a printing press - Google Patents

A method and device for cleaning guide rollers in a printing press Download PDF

Info

Publication number
EP0816078B1
EP0816078B1 EP19970202028 EP97202028A EP0816078B1 EP 0816078 B1 EP0816078 B1 EP 0816078B1 EP 19970202028 EP19970202028 EP 19970202028 EP 97202028 A EP97202028 A EP 97202028A EP 0816078 B1 EP0816078 B1 EP 0816078B1
Authority
EP
European Patent Office
Prior art keywords
roller
web
rollers
printing press
length
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
EP19970202028
Other languages
German (de)
French (fr)
Other versions
EP0816078A2 (en
EP0816078A3 (en
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 AB
Original Assignee
Jimek 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 AB filed Critical Jimek AB
Publication of EP0816078A2 publication Critical patent/EP0816078A2/en
Publication of EP0816078A3 publication Critical patent/EP0816078A3/en
Application granted granted Critical
Publication of EP0816078B1 publication Critical patent/EP0816078B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the present invention relates to a method and device for cleaning guide rollers in a printing press, a paper web being lead over these rollers in continuous motion.
  • the web is provided with a length of washing solution or cleaning liquid, and the length is transferred to each roller, which is braked pulswise, when an appropriate part of said length passes over it
  • a printing press is often provided with a large number of guide rollers, over which the web is lead to further processes after printing.
  • the total number of such rollers is often many times greater than the number used in a certain application.
  • rollers used will after a certain running time cause set-off problems by being dirtied with printing ink residues, paper fibres and so forth and need to be cleaned.
  • the web can be removed from the printing press and the used rollers be manually cleaned with a washing solution or cleaning liquid. It goes without saying that such a manual cleaning is laborious and splashy, and after the cleaning the web has again to be lead through the press manually.
  • EP-A-423 093 (from the same applicant as in the present case), DE-C-3 900 657, and US-A-4 781 116 are examples of the prior art as defined in the introductory paragraph above.
  • a more convenient method of cleaning the utilized guide rollers is according to the invention attained in that the position - in the form x/y coordinates in a printing press related coordinate system - of each roller to be cleaned, the diameter of the roller, and the speed of the web are supplied to a computer for determining an appropriate roller braking sequence.
  • This sequence may involve more than said maximum number of rollers, but for avoiding web break they are not allowed to be braked concurrently.
  • the x/y coordinates and the diameter of each roller in the press can be pre-entered in the computer together with a corresponding ordinal number. For a certain set-up only the ordinal numbers for the rollers used need to be entered in the computer in the order they are engaged by the web.
  • the length of washing solution on the web is preferably applied by means of an applicator remote from the rollers in the printing press.
  • the above defined process means that washing solution in a certain length is applied on the web and transported to each roller to be cleaned.
  • the rotating roller will be provided with washing solution from the web.
  • the cleaning effect is greatly enhanced by pulsewise braking of the roller, so that it will be rubbed and cleaned. If desired for improving the cleaning and drying of the roller, pulsewise braking of the roller may also occur, when a dry part of the web has reached the roller.
  • a printing press has a number of printing units 1, each having an ink train, a dampener arrangement, a plate cylinder and a blanket cylinder in the case of an offset press. (It has to be noted, however, that the invention is applicable to different types of printing presses.)
  • a paper web 2 passes the blanket cylinder in the printing unit 1, where it is printed.
  • the web After having been printed, the web continues over a certain number of rollers or guide rollers 3 out of a much greater number of such rollers totally provided in the press.
  • the chosen path for the web depends on the further processing in the press, which may vary widely.
  • This brake 4 may for example be electrically controlled, pneumatically operated and mechanically applied. Other designs are possible.
  • an applicator 5 for washing solution or cleaning liquid is arranged at the web 2, preferably before or downstream of the printing unit 1, an applicator 5 for washing solution or cleaning liquid is arranged.
  • This applicator is further described in applicant's copending Swedish Patent Application No 9504660-3, and no description is accordingly given here.
  • a washing solution may be tranferred from the applicator 5 to the web 2.
  • the roller is withdrawn from contact with the web 2.
  • the device is provided with a computerized control system, whereby a cleaning sequence as described below may be obtained.
  • the positions of the respective rollers 3 used in a particular set-up are supplied to the computer in the form of x/y coordinates with a suitable origo in the printing press, for example in the applicator 5. Also positions of rollers and/or bars over which the web is lead but which are not to be cleaned have to be put into the computer. Further data put into the computer are the speed of the web 2 and the diameter of each roller 3 passed by the web 2. The winding angle of the web 2 around each roller 3 is computed by the computer.
  • control system may operate the arrangement in the following way for cleaning each roller 3 used in a particular set-up from paper fibres, printing ink residues and the like:
  • the web 2 moves with a given speed through the arrangement.
  • the applicator 5 provides the web with a length of washing solution which is either fixed or appropriate with regard to the number of rollers to be cleaned. Based on the input data and the fact that only a limited number of rollers may be braked at a time for avoiding an otherwise occurring web break, the computer determines a certain brake sequence for the roller brakes, so that an optimal cleaning result is obtained. When an appropriate part of the washing solution length reaches a rotating roller 3, washing solution is transferred to the roller. In order to greatly improve the cleaning of the roller by a rubbing effect, the roller is then braked pulswise by its brake 4.
  • the washing solution can then together with the dirt be removed by a subsequent dry part of the web 2.
  • the cleaning and drying effect may be improved by pulsewise braking of the roller also at this stage, but the main cleaning effect is obtained in the first stage with the washing solution.

Landscapes

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

Description

    Technical Field
  • The present invention relates to a method and device for cleaning guide rollers in a printing press, a paper web being lead over these rollers in continuous motion. At a place remote from the rollers the web is provided with a length of washing solution or cleaning liquid, and the length is transferred to each roller, which is braked pulswise, when an appropriate part of said length passes over it
    • Background of the Invention
  • A printing press is often provided with a large number of guide rollers, over which the web is lead to further processes after printing. The total number of such rollers is often many times greater than the number used in a certain application.
  • The rollers used will after a certain running time cause set-off problems by being dirtied with printing ink residues, paper fibres and so forth and need to be cleaned.
  • Conventionally, the web can be removed from the printing press and the used rollers be manually cleaned with a washing solution or cleaning liquid. It goes without saying that such a manual cleaning is laborious and splashy, and after the cleaning the web has again to be lead through the press manually.
  • EP-A-423 093 (from the same applicant as in the present case), DE-C-3 900 657, and US-A-4 781 116 are examples of the prior art as defined in the introductory paragraph above.
    • The Invention
  • A more convenient method of cleaning the utilized guide rollers is according to the invention attained in that the position - in the form x/y coordinates in a printing press related coordinate system - of each roller to be cleaned, the diameter of the roller, and the speed of the web are supplied to a computer for determining an appropriate roller braking sequence.
  • At the sliding movement of the web over the braked rollers a certain web tension is built up, which ultimately may lead to a web break. Accordingly, only a limited number of rollers may be braked at the same time.
  • As said, an operating sequence for obtaining best possible cleaning result is determined, This sequence may involve more than said maximum number of rollers, but for avoiding web break they are not allowed to be braked concurrently.
  • The x/y coordinates and the diameter of each roller in the press can be pre-entered in the computer together with a corresponding ordinal number. For a certain set-up only the ordinal numbers for the rollers used need to be entered in the computer in the order they are engaged by the web.
  • The length of washing solution on the web is preferably applied by means of an applicator remote from the rollers in the printing press.
  • The above defined process means that washing solution in a certain length is applied on the web and transported to each roller to be cleaned. The rotating roller will be provided with washing solution from the web. The cleaning effect is greatly enhanced by pulsewise braking of the roller, so that it will be rubbed and cleaned. If desired for improving the cleaning and drying of the roller, pulsewise braking of the roller may also occur, when a dry part of the web has reached the roller.
    • The Drawing
  • The invention will be described in further detail below reference being made to the accompanying drawing showing a printing press embodying the invention.
    • Description of a Preferred Embodiment
  • An example of a printing press is shown in the drawing. This press has a number of printing units 1, each having an ink train, a dampener arrangement, a plate cylinder and a blanket cylinder in the case of an offset press. (It has to be noted, however, that the invention is applicable to different types of printing presses.) A paper web 2 passes the blanket cylinder in the printing unit 1, where it is printed.
  • After having been printed, the web continues over a certain number of rollers or guide rollers 3 out of a much greater number of such rollers totally provided in the press. The chosen path for the web depends on the further processing in the press, which may vary widely.
  • Each such roller 3, over which the web 2 passes in a particular application, is provided with a brake 4, by which it may be brought to a stand-still. This brake 4 may for example be electrically controlled, pneumatically operated and mechanically applied. Other designs are possible.
  • At the web 2, preferably before or downstream of the printing unit 1, an applicator 5 for washing solution or cleaning liquid is arranged. This applicator is further described in applicant's copending Swedish Patent Application No 9504660-3, and no description is accordingly given here. However, by means of a driven roller thereof a washing solution may be tranferred from the applicator 5 to the web 2. When washing solution is not to be transferred, the roller is withdrawn from contact with the web 2.
  • The device is provided with a computerized control system, whereby a cleaning sequence as described below may be obtained.
  • The positions of the respective rollers 3 used in a particular set-up are supplied to the computer in the form of x/y coordinates with a suitable origo in the printing press, for example in the applicator 5. Also positions of rollers and/or bars over which the web is lead but which are not to be cleaned have to be put into the computer. Further data put into the computer are the speed of the web 2 and the diameter of each roller 3 passed by the web 2. The winding angle of the web 2 around each roller 3 is computed by the computer.
  • Based on the computer data thus created the control system may operate the arrangement in the following way for cleaning each roller 3 used in a particular set-up from paper fibres, printing ink residues and the like:
  • The web 2 moves with a given speed through the arrangement. The applicator 5 provides the web with a length of washing solution which is either fixed or appropriate with regard to the number of rollers to be cleaned. Based on the input data and the fact that only a limited number of rollers may be braked at a time for avoiding an otherwise occurring web break, the computer determines a certain brake sequence for the roller brakes, so that an optimal cleaning result is obtained. When an appropriate part of the washing solution length reaches a rotating roller 3, washing solution is transferred to the roller. In order to greatly improve the cleaning of the roller by a rubbing effect, the roller is then braked pulswise by its brake 4.
  • The washing solution can then together with the dirt be removed by a subsequent dry part of the web 2. The cleaning and drying effect may be improved by pulsewise braking of the roller also at this stage, but the main cleaning effect is obtained in the first stage with the washing solution.

Claims (8)

  1. A method for cleaning guide rollers (3) in a printing press, wherein
    a web (2) being lead over these rollers in continuous motion is provided at a place remote from the rollers with a length of washing solution or cleaning liquid,
    the length is transferred to each roller, and
    each roller is braked pulsewise, when an appropriate part of said length passes over it,
       characterized in that the position - in the form of x/y coordinates in a printing press related coordinate system - of each roller (3) to be cleaned, the diameter of the roller, and the speed of the web (2) are supplied to a computer for determining an appropriate roller braking sequence.
  2. A method according to claim 1, characterized in that the maximum number of concurrently braked rollers (3) is determined for avoiding web break due to increased web tension.
  3. A method according to claim 1 or 2, characterized in that initially the x/y coordinates and the diameter of each roller (3) in the press are entered in the computer together with a corresponding ordinal number and that only the ordinal numbers for the rollers used in a certain set-up are entered in the computer in the order they are engaged by the web (2).
  4. A method according to claim 1, characterized in that the length of washing solution on the web (2) is applied by means of an applicator (5) remote from the rollers (3) in the printing press.
  5. A method according to any of the preceding claims,
    characterized in that the roller (3) to be cleaned is braked by means of a brake (4).
  6. A device for cleaning guide rollers (3) in a printing press, a web (2) being lead over these rollers, comprising
    applying means (5) remote from a rollers (3) to be cleaned for applying a length of washing solution or cleaning liquid to the web (2) being in continuous motion and
    a roller brake (4) to be applied pulsewise, when an appropriate part of the length of washing solution passes over the respective roller,
       characterized by
       a computer for determining an appropriate roller braking sequence in view of entered data regarding the position - in the form of x/y coordinates in a printing press related coordinate system - of each roller (3) to be cleaned, the diameter of the roller, and the speed of the web (2).
  7. A device according to claim 6, characterized in that the applying means in the form of an applicator (5) has an applicator roller brought into contact with the web (2), when washing solution is to be applied to the web.
  8. A device according to claim 7, characterized in that the roller brake (4) is electrically controlled, pneumatically operated and mechanically applied.
EP19970202028 1996-07-05 1997-07-02 A method and device for cleaning guide rollers in a printing press Expired - Lifetime EP0816078B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602655A SE508055C2 (en) 1996-07-05 1996-07-05 Method and apparatus for cleaning guide rollers in a printing press
SE9602655 1996-07-05

Publications (3)

Publication Number Publication Date
EP0816078A2 EP0816078A2 (en) 1998-01-07
EP0816078A3 EP0816078A3 (en) 1998-06-24
EP0816078B1 true EP0816078B1 (en) 2001-10-24

Family

ID=20403284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970202028 Expired - Lifetime EP0816078B1 (en) 1996-07-05 1997-07-02 A method and device for cleaning guide rollers in a printing press

Country Status (4)

Country Link
EP (1) EP0816078B1 (en)
JP (1) JPH1067100A (en)
DE (1) DE69707570T2 (en)
SE (1) SE508055C2 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU579278B2 (en) * 1986-04-28 1988-11-17 Nikka Kabushiki Kaisha Washing method and apparatus for guide rollers of rotary press
US4930415A (en) * 1988-02-10 1990-06-05 Baldwin-Japan Limited Automatic web guide roller cleaning device
DE3900657C1 (en) * 1989-01-11 1990-06-13 Rolf 7403 Ammerbuch De Georg Method and apparatus for influencing the web run when cleaning blanket cylinders of a web-fed rotary offset printing machine
SE8903330L (en) * 1989-10-10 1991-04-11 Birger Hansson PROCEDURE AND DEVICE FOR CLEANING BREADERS
DE4434052A1 (en) * 1994-09-23 1996-03-28 Bvs Gmbh Car wash control
SE508271C2 (en) * 1995-12-27 1998-09-21 Jimek Ab Method and device of an applicator

Also Published As

Publication number Publication date
EP0816078A2 (en) 1998-01-07
SE9602655L (en) 1998-01-06
SE9602655D0 (en) 1996-07-05
DE69707570T2 (en) 2002-06-27
JPH1067100A (en) 1998-03-10
SE508055C2 (en) 1998-08-17
EP0816078A3 (en) 1998-06-24
DE69707570D1 (en) 2001-11-29

Similar Documents

Publication Publication Date Title
DE60303990T3 (en) Washing process for a printing cylinder in a sheet-fed printing machine for double-sided printing
EP1737659B1 (en) Pad for embossing device
WO2009150029A1 (en) Device for cold foil embossing
US5259313A (en) Method and apparatus for cleaning an inking mechanism and/or a printing mechanism in printing units of rotary printing machines
JP2918090B2 (en) Fully automatic print cylinder cleaning method for printing machines with central control system
US6308619B1 (en) Web-fed rotary printing press with apparatus for diverting a wet printed web
CN100357099C (en) Method for washing rubber of rotary offset machine and method for removing rubber washing liquid
EP0816078B1 (en) A method and device for cleaning guide rollers in a printing press
ATE173196T1 (en) METHOD AND DEVICE FOR WASHING A FORM CYLINDER AND AN ASSOCIATED APPLICATION ROLLER IN A PRINTING MACHINE
EP2844472B1 (en) On-demand operation of a flexographic coating unit
DE102006056897A1 (en) Method for transferring image-forming layers of a transfer film of a carrier film to a printed sheet comprises using a cleaning device which is placed on a pressing roller in the region of the transfer film before or after the transfer gap
US6070530A (en) Method and apparatus for cleaning a cylinder of a rotary printing machine
EP1676702B1 (en) Foil supplying for cold foil embossing
JPH0462540B2 (en)
US5490459A (en) Printing press and method for removing ink build-up with sideways web movement
EP0855269A1 (en) Method of cleaning the outer surface of a cylinder
EP0816080B1 (en) A method for cleaning a blanket cylinder in a printing press
JP3343111B2 (en) Equipment for web processing
CN1272427A (en) Cleaning device for printer
CA2198253A1 (en) Method and device for washing the drying wire in a paper or board machine
EP0858396A1 (en) Method for cleaning a center roll of a printing press
US6782823B1 (en) Imaging unit for a printing form cylinder
EP0378180B1 (en) Method and device for cleaning blanket cylinders in rotary web-printing machines
DE3810786A1 (en) Device for washing a cylinder of a printing machine
EP1108537A2 (en) Method and device for treating the surface of printable supports in printing presses

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH DE FR GB IT LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 19980721

AKX Designation fees paid

Free format text: CH DE FR GB IT LI SE

RBV Designated contracting states (corrected)

Designated state(s): CH DE FR GB IT LI SE

17Q First examination report despatched

Effective date: 19990204

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69707570

Country of ref document: DE

Date of ref document: 20011129

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: HUG INTERLIZENZ AG

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020625

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020701

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020716

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020724

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020924

Year of fee payment: 6

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030702

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040203

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030702

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050702