EP0325535A1 - Verfahren zum Befestigen und Positionieren von Offsetdruckplatten mit magnetischer Unterstützung und Druckplatte und Offsetdruckmaschine zur Durchführung des Verfahrens - Google Patents

Verfahren zum Befestigen und Positionieren von Offsetdruckplatten mit magnetischer Unterstützung und Druckplatte und Offsetdruckmaschine zur Durchführung des Verfahrens Download PDF

Info

Publication number
EP0325535A1
EP0325535A1 EP89400151A EP89400151A EP0325535A1 EP 0325535 A1 EP0325535 A1 EP 0325535A1 EP 89400151 A EP89400151 A EP 89400151A EP 89400151 A EP89400151 A EP 89400151A EP 0325535 A1 EP0325535 A1 EP 0325535A1
Authority
EP
European Patent Office
Prior art keywords
plate
cylinder
plates
offset printing
positioning
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
EP89400151A
Other languages
English (en)
French (fr)
Other versions
EP0325535B1 (de
Inventor
Jean-Marie Nouel
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT89400151T priority Critical patent/ATE88670T1/de
Publication of EP0325535A1 publication Critical patent/EP0325535A1/de
Application granted granted Critical
Publication of EP0325535B1 publication Critical patent/EP0325535B1/de
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
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/02—Magnetic devices

Definitions

  • the present invention relates to a method and a device for the magnetic attachment of offset plates.
  • Offset plates are currently placed on printing machines using various mechanical devices among these devices, the most used are constituted by two jaws which tighten and tension the plates around the plate cylinder; these mechanical devices have various drawbacks, among which we can mention the existence of an unbalance (more or less significant depending on the nature of the jaws) on the plate cylinder, a positioning of the plate requiring precise and long adjustments and a certain weakening of the plate due to mechanical stress, which leads, for aluminum-based plates for example, to the risk of breakage during installation at start-up, or during rolling.
  • the printer part of the plate that is to say the part of the plate which includes the ink-absorbing and aquaphile zones. It is therefore first of all necessary, by known means, to ensure that this printing part of the plate is exactly positioned in relation to the plate itself, that is to say in relation to fixed marks (sides of the plate, lines drawn on the plate, hole lines made on one edge of the plate ...) integral with this plate (or forming part of the plate). As indicated above, the means for exactly positioning the printer part on the plate are known.
  • Magnetic snapping is also known; it consists in that the plate cylinder has, flush with its surface, a sufficient number of magnets so that the plate is securely attached to it.
  • These magnets can have the most diverse shapes, they are generally in the form of studs or benches arranged along the generatrices of the cylinders.
  • the following two means should be used: - a prior bending of the plate, a threading of the plate on nipples formed on the plate cylinder, in the vicinity of an edge thereof, in a plane perpendicular to the axis of the cylinder, this threading being made possible by the arrangement, the along one of the edges of the plate, openings suitably positioned to correspond to said pins.
  • prior “bending” is meant that the plate is subjected before its installation, on the plate cylinder, a permanent deformation such that said plate, initially planar, is in the form of a cylinder whose the diameter is of the order of magnitude of the diameter of the plate cylinder, and even preferably slightly smaller.
  • This bending operation obviously implies that the nature of the steel which constitutes the base of the plate is suitably chosen, this choice being within the reach of any specialist in this material.
  • this bending operation involves a certain elongation of the outer surface portion of the plate; avoid any excessive deformation and make sure, by bending under identical or similar conditions for the various plates, to always have an identical elongation of said surface portion.
  • This possibility thanks to the prior bending, to control and make reproducible from one plate to another this elongation phenomenon, is important because it allows the realization of a very precise positioning of the plate.
  • a plate is obviously used provided, along and in the vicinity of at least one of its lateral edges, with suitable openings.
  • the shape, dimensions (generally the diameter) and the relative position of these openings must correspond to the pins with which these openings must cooperate. Taking into account the high mechanical properties of the steel-supported plates and taking into account the prior bending under controlled conditions, it is possible to provide a very precise adaptation of said openings with said nipples.
  • the pins on which the plate openings are threaded are arranged on the plate cylinder, in the vicinity of an edge of said cylinder and in a plane perpendicular to the axis of the cylinder.
  • the offset plates most often have, on their edges, openings intended to ensure the positioning of the printing part of the plate with respect to said plate. It is obviously possible to use these openings to, in cooperation with pins arranged on the cylinder, position the plate, but experience proves that, in current machines, such pins would not be positioned beyond the neighboring cylinders and rollers. of the plate cylinder, which would require sometimes expensive arrangements of said cylinders and rollers. Thus, most often, it is preferred to use other openings, often in greater numbers, to ensure the positioning of the plates.
  • the present invention therefore relates to a method for hooking and positioning offset plates on the plate cylinders of offset machines by using a magnetic hook, characterized in that a plate is used in the vicinity of at at least one of its lateral edges of the openings suitably arranged, in that said plate-carrying cylinder comprises, in the vicinity of at least one of its edges, a series of pins arranged in a plane perpendicular to the axis of the cylinder, said pins being adapted to said openings and that a prior bending of the plate is carried out before positioning the latter on said cylinder by using said pins and said openings.
  • the present invention also relates to - offset plates usable for implementing the method of hooking and positioning according to the invention, said plates being characterized in that they have a steel base and a series of openings arranged in the vicinity of at least one of the longitudinal edges of said plates, - offset machines for implementing the method of hanging and positioning according to the invention, characterized in that their plate cylinder has a width slightly greater than that of the immediately neighboring cylinders and that said plate-carrying cylinder has on its projecting part with respect to the immediately neighboring cylinders and rollers a series of pins.
  • the plates are maintained and positioned by pins located in the vicinity of the edge of the plate cylinder and no longer by means (jaws for example) arranged along a generator of said cylinder. It follows that the sides of the plate which are arranged, after positioning, along a generator of said cylinder are free, that is to say are only held by means of the magnets arranged on the cylinder. In general, this arrangement does not cause any difficulties (all the more so as a person skilled in the art will properly dispose the magnets on said cylinder), but it may be that during the handling of the plate the edges thereof (edges positioned along the generators) are slightly deformed; this deformation could cause the plate to tear off during rolling.
  • the plate cylinder could comprise, on a portion of said cylinder corresponding to the ends of the plate, a slight depression in which at least one magnet is disposed. . It is understood that thanks to this depression the ends of the plates will always be slightly reentrant (that is to say will be maintained within the theoretical circle formed by the plate cylinder) and cannot, therefore, undergo damage, even in the event of accidental deformation of the ends of the plate.
  • the plate cylinder of this machine is 1045 mm wide.
  • this plate cylinder is of sufficient width to be able to use there in the vicinity of the edges of the fixing studs according to the invention, said cylinder has been replaced by a plate cylinder (of perfectly cylindrical shape) of 1,100 mm in width comprising, flush with its surface, magnets arranged along generatrices of said cylinder.
  • FIGS. 1 and 2 This transformation of the machine is shown diagrammatically in FIGS. 1 and 2.
  • the plate cylinder 1 has, with respect to the plate cylinder of a corresponding current offset machine, the following characteristics: - Magnets 4 which are flush with the surface of said cylinder have been arranged along generatrices of the cylinder - there are disposed in the vicinity of the edges of said cylinder pins 5 (which will cooperate with the openings formed along the edges of the plates) and, so as not to have to modify the rollers 2 and 3, the plate cylinder is enlarged by so as to reject said nipples outside the grip of rollers 2 and 3.
  • FIG. 3 there is shown, in section along II-II, an improvement of the invention consisting in providing on a cer taine width of the cylinder a slight depression 6.
  • this depression we have arranged, for example and preferably, a magnet 4.
  • the offset plate When the offset plate is placed around the cylinder at least one of the ends of said plate (the likely end to be torn off during rolling) will be attracted by the magnet 4.
  • the two ends of said plate can be attracted by the magnet 4 (or by other magnets mounted in said depression 6.
  • a plate will be used comprising a black iron support whose mechanical qualities are those of European standard T 61 and whose thickness is 25/100.
  • This black iron support was covered with a layer of hydrophilic matt chromium and a positive photosensitive encrophilic layer.
  • This plate has the distinction of having, on its two sides, openings which correspond exactly to the pins 5 present on the plate cylinder.
  • the plate is then placed around the plate cylinder by inserting the plate through the pressure end side and then placing this plate so as to thread the pins into the holes in the plate.
  • This process provides rapid and precise positioning of the plate.
  • the width of the plate is the same as that of the plate cylinder and that said plate has openings on its two lateral sides.
  • This arrangement is not essential since it is possible to use for a plate cylinder with a width L two plates each having a width a little less than L / 2; each of these plates will have active openings only on one of its lateral sides.

Landscapes

  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Screen Printers (AREA)
EP89400151A 1988-01-21 1989-01-19 Verfahren zum Befestigen und Positionieren von Offsetdruckplatten mit magnetischer Unterstützung und Druckplatte und Offsetdruckmaschine zur Durchführung des Verfahrens Expired - Lifetime EP0325535B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89400151T ATE88670T1 (de) 1988-01-21 1989-01-19 Verfahren zum befestigen und positionieren von offsetdruckplatten mit magnetischer unterstuetzung und druckplatte und offsetdruckmaschine zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8800664 1988-01-21
FR8800664A FR2626214B1 (fr) 1988-01-21 1988-01-21 Procede d'accrochage et de positionnement de plaques d'impression offset a support magnetique, ainsi que plaques et machines d'impression offset utilisables pour sa mise en oeuvre

Publications (2)

Publication Number Publication Date
EP0325535A1 true EP0325535A1 (de) 1989-07-26
EP0325535B1 EP0325535B1 (de) 1993-04-28

Family

ID=9362499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400151A Expired - Lifetime EP0325535B1 (de) 1988-01-21 1989-01-19 Verfahren zum Befestigen und Positionieren von Offsetdruckplatten mit magnetischer Unterstützung und Druckplatte und Offsetdruckmaschine zur Durchführung des Verfahrens

Country Status (4)

Country Link
EP (1) EP0325535B1 (de)
AT (1) ATE88670T1 (de)
DE (1) DE68906168T2 (de)
FR (1) FR2626214B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354148A (en) * 1991-10-01 1994-10-11 Colas Apparatus for spreading a bonding emulsion, or similar fluids, and road-building machine
EP0775577A1 (de) * 1995-11-21 1997-05-28 BIELOMATIK LEUZE GmbH + Co. Bearbeitungs-Werkzeug zur Bearbeitung von Lagen-Material od. dgl.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10112761A1 (de) 2000-04-13 2001-10-18 Heidelberger Druckmasch Ag Verfahren zum Gebrauch einer Druckplatte

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1629376A (en) * 1926-11-13 1927-05-17 Howard T Buck Attaching means for multigraph signature plates
CH323933A (de) * 1954-08-30 1957-08-31 Herzer Alfred Emil Magnetisierbarer, planer und biegsamer Druckformträger für Rakeltiefdruck
GB1505548A (en) * 1976-12-09 1978-03-30 Plastotype Ltd Printing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1286536C (en) * 1986-02-07 1991-07-23 Donnelley (R.R.) & Sons Company Printing cylinder with retractable plate register pin and method of assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1629376A (en) * 1926-11-13 1927-05-17 Howard T Buck Attaching means for multigraph signature plates
CH323933A (de) * 1954-08-30 1957-08-31 Herzer Alfred Emil Magnetisierbarer, planer und biegsamer Druckformträger für Rakeltiefdruck
GB1505548A (en) * 1976-12-09 1978-03-30 Plastotype Ltd Printing apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354148A (en) * 1991-10-01 1994-10-11 Colas Apparatus for spreading a bonding emulsion, or similar fluids, and road-building machine
EP0775577A1 (de) * 1995-11-21 1997-05-28 BIELOMATIK LEUZE GmbH + Co. Bearbeitungs-Werkzeug zur Bearbeitung von Lagen-Material od. dgl.
US5792262A (en) * 1995-11-21 1998-08-11 Bielomatik Leuze Gmbh & Co. Processing tool for processing ply material or the like

Also Published As

Publication number Publication date
DE68906168T2 (de) 1993-11-18
FR2626214A1 (fr) 1989-07-28
EP0325535B1 (de) 1993-04-28
ATE88670T1 (de) 1993-05-15
DE68906168D1 (de) 1993-06-03
FR2626214B1 (fr) 1995-05-12

Similar Documents

Publication Publication Date Title
JPH09207308A (ja) フレキソ印刷またはグラビア印刷ロール用スリーブ、その製造方法、およびその製造装置の作動方法
US4587900A (en) Master retaining device for a printing machine
JP3442372B2 (ja) 特にオフセットロール紙輪転印刷機のためのゴム胴スリーブ
FR2716140A1 (fr) Presse rotative à imprimer et procédé pour remplacer l'élément de revêtement devant être tendu d'un cylindre.
EP0325535B1 (de) Verfahren zum Befestigen und Positionieren von Offsetdruckplatten mit magnetischer Unterstützung und Druckplatte und Offsetdruckmaschine zur Durchführung des Verfahrens
EP0185421B1 (de) Rotationsdruckmaschine für indirekten mehrfarbigen Schön- und Widerdruck
JP3674500B2 (ja) 円筒物品へのオフセット印刷方法とその装置
EP1176796A3 (de) Blattmaterialhalter
EP0683046B1 (de) Hülse zum Montieren auf Trägerzylindern von Flexodruckmaschinen
US20090044713A1 (en) Gravure Printing-Form Sleeve and Production Thereof
EP0455068A1 (de) Verfahren zum Montieren und Befestigen einer Druckplatte auf einem Plattenzylinder in einer Offsetmaschine
JP2002326341A (ja) ブランケット固定装置とその方法及びブランケット
FR2723708A1 (fr) Cylindre porte-plaques dispose dans une presse rotative
FR2559426A1 (fr) Plaque flexographique
JPH09300588A (ja) 輪転機のブランケット装着方法および装着装置
JPH08118603A (ja) 印刷胴の緩衝装置
JP3606817B2 (ja) コーティング材の重ね印刷用凸版印刷装置
FR2715103A1 (fr) Unités d'impression de machines offset rotatives.
FR2922479A1 (fr) Procede de montage d'un manchon mince sur un cylindre porteur de machine d'impression, manchon transfert adapte
JP5292745B2 (ja) グラビア印刷用版胴
JPH0538804A (ja) フレキシブルな印刷ロール
KR200285100Y1 (ko) 롤러용 스크레이퍼
JPS6015158A (ja) 凹版印刷機
JPH09309278A (ja) ゴムブランケットおよびブランケット胴
JP2853388B2 (ja) 画像転写装置

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: A1

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19900119

17Q First examination report despatched

Effective date: 19910617

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;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.SCRIBED TIME-LIMIT

Effective date: 19930428

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19930428

Ref country code: SE

Effective date: 19930428

Ref country code: NL

Effective date: 19930428

Ref country code: AT

Effective date: 19930428

Ref country code: GB

Effective date: 19930428

REF Corresponds to:

Ref document number: 88670

Country of ref document: AT

Date of ref document: 19930515

Kind code of ref document: T

REF Corresponds to:

Ref document number: 68906168

Country of ref document: DE

Date of ref document: 19930603

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19930428

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

Ref country code: LU

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

Effective date: 19940131

Ref country code: BE

Effective date: 19940131

Ref country code: CH

Effective date: 19940131

Ref country code: LI

Effective date: 19940131

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

26N No opposition filed
BERE Be: lapsed

Owner name: NOUEL JEAN-MARIE

Effective date: 19940131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: DE

Payment date: 19960120

Year of fee payment: 8

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

Ref country code: FR

Payment date: 19961231

Year of fee payment: 9

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

Ref country code: DE

Effective date: 19971001

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

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19980131

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST