EP0287563B1 - Verfahren zum perforieren und drucktuch für rotationsdruckmaschine mit perforiereinrichtung, zum beispiel offsetpresse - Google Patents

Verfahren zum perforieren und drucktuch für rotationsdruckmaschine mit perforiereinrichtung, zum beispiel offsetpresse Download PDF

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Publication number
EP0287563B1
EP0287563B1 EP19870900174 EP87900174A EP0287563B1 EP 0287563 B1 EP0287563 B1 EP 0287563B1 EP 19870900174 EP19870900174 EP 19870900174 EP 87900174 A EP87900174 A EP 87900174A EP 0287563 B1 EP0287563 B1 EP 0287563B1
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EP
European Patent Office
Prior art keywords
blanket
groove
printing
cylinder
small bar
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
EP19870900174
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English (en)
French (fr)
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EP0287563A1 (de
Inventor
Gilbert Orsi
Jean-Claude Orsi
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to AT87900174T priority Critical patent/ATE57136T1/de
Publication of EP0287563A1 publication Critical patent/EP0287563A1/de
Application granted granted Critical
Publication of EP0287563B1 publication Critical patent/EP0287563B1/de
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
    • B41G—APPARATUS FOR BRONZE PRINTING, LINE PRINTING, OR FOR BORDERING OR EDGING SHEETS OR LIKE ARTICLES; AUXILIARY FOR PERFORATING IN CONJUNCTION WITH PRINTING
    • B41G7/00—Auxiliary perforating apparatus associated with printing devices

Definitions

  • the present invention relates to a blanket for a rotary printing machine, such as a sheetfed or continuous offset machine, equipped with a punching device.
  • the most annoying drawback of this method of pre-cutting the sheets of paper lies in the fact that the teeth or cutting elements of the perforating nets penetrating into the soft material of the blanket, create blisters, at the level of the perforations, on the face of said sheets opposite to the penetrating face. After punching, the sheets of paper tend to bend slightly at the level of the punch line. In the case of the printing of sheets having a detachable useful surface and a narrow strip allowing their assembly, for example in the form of notebooks or bundles, the narrow strip of the sheets tends to lift slightly relative to the detachable useful surface of said leaves, instead of staying flat.
  • the printed and perforated sheets are very poorly received and very poorly "jogged” or centered on the receiving plate, due to the lack of rigidity of said sheets which are slightly folded and of their blisters which hang on to each other, so that the stack of sheets stacked on said receiving tray is irregular and has one side higher than the other.
  • the stacking height of the sheets is thereby reduced correspondingly, which leads to frequent changes of the receiving carriage and, consequently, to frequent machine stops.
  • poorly stacked sheets can be easily damaged and made unusable, which results in significant loss of time when these sheets are numbered.
  • the printed and perforated sheets are generally assembled in an automatic collator which must receive stacks of sheets perfectly “jogged” or centered and flat above, so that it is necessary to resume, by hand, “jogging "or centering improperly stacked sheets, which is another waste of time.
  • the object of the invention is in particular to remedy the aforementioned drawbacks of the perforation process according to which the teeth or cutting elements of the perforating nets are carried by the printing cylinder and applied against the blanket.
  • this object is achieved thanks to a blanket provided with at least one groove opening on its active external face or printing surface and in the bottom of which is housed a strip or strip made of a hard material. , this bar having an upper face against which the perforating or cutting elements of the perforating threads fixed on the printing cylinder of the machine are intended to come into pressure, during the printing process.
  • the sharpness of the perforation means that, during the subsequent use of the bundles and, above all, the notebooks, it is very easy to detach several sheets at a time with a very nice appearance of the edge resulting from the pre-cutting of said sheets.
  • rotary printing machines such as offset machines of all kinds mainly comprising ( Figure 1) a plate cylinder 1 with which are associated inking rollers 2 and dampening rollers 3, a blanket cylinder 4 and a printing cylinder 5 also called a pressure cylinder or margin cylinder, a feeding station 6 receiving the stacks of blank sheets 7 to be printed, and a receiving tray 8 on which are stacked the printed sheets, numbered and perforated 9, after their passage in the printing and punching assembly.
  • a jogging device (not shown) ensures the correct stacking of the printed sheets, on the receiving tray.
  • the blanket cylinder 4 is intended for the removable mounting of the flexible blanket 10 made of rubber or elastomer with a very fine grain and perfectly regular and on which the pattern deposited on the plate deposited on the plate cylinder 1 is deposited, during the printing process, this pattern then transfers to the sheets of paper.
  • the blanket 10 is provided with at least one groove 11 opening on its printing face and in the bottom of which is housed a bar 12 made of a hard and non-compressible material.
  • the position of the groove or grooves 11 provided with a non-compressible bar 12 is a function of the location of the perforations to be made on the printed sheets of paper.
  • the groove 11 or each groove 11 is formed at a location intended to come into contact with the cutting elements of a perforating thread bonded to the printing cylinder, during the printing process, as is best seen from the which follows.
  • a blanket 10 provided with a groove 11 with a reinforced bottom which is arranged parallel to the axis of the cylinders 1, 4, 5 when said blanket is installed on the blanket cylinder, while there is shown in Figure 3, a blanket 10 provided with two parallel grooves 11 with reinforced bottom which are arranged in the circumferential direction when said blanket is mounted on the blanket cylinder.
  • the blanket can also be provided, at the same time, with one or more grooves with reinforced bottom oriented parallel to the axis of the cylinders, and with one or more grooves with reinforced bottom arranged in the circumferential direction, as shown in Figure 3.
  • the groove or grooves with a reinforced bottom 11-12 can be formed in any part of the outer surface of the blanket, and in any orientation or pattern, as required. It suffices, prior to the execution of the groove (s), to wear the usual and necessary marks on the blanket and to dig the said groove (s) at the locations of these marks.
  • the longitudinal walls 11a of the groove or of each groove 11 have a divergent orientation in the direction of the printing surface 10a of the blanket 10, as shown in particular in FIG. 6.
  • the groove or each groove 11 can be executed during the manufacture of the blanket or later, as required, before use thereof.
  • a layer 13 of a sealant such as a polyurethane varnish is applied to the bottom and the sides of the groove after it has been hollowed out. desired size and height, in order to ensure a permanent seal at this groove and thus to avoid detergents used for frequent cleaning of the blanket, being able to penetrate into the multi-layers of the latter.
  • the non-compressible bar 12 constituting the reinforced bottom of the groove or of each groove 11, can be put in place during the manufacture of the blanket, or subsequently, as required, before use thereof.
  • the bar 12 can be glued, in the bottom of the groove 11, in a removable manner, by means of an adhesive strip 14 provided with two opposite self-adhesive faces and having a width and a length identical to those of said bar.
  • the double-sided adhesive strip 14 is fixed, by means of one of its self-adhesive faces, to the bottom of the groove, while the bar is glued to said adhesive strip by means of the second auto face. - sticky of the latter.
  • the bar 12 forming the bottom of the groove 11 is formed by a strip of material that is not compressible or has a very low degree of malleability, but the hardness of which is however less than that of the teeth or cutting elements of the perforating nets intended to be glued to the printing cylinder 5 of the machine.
  • the bar 12 can advantageously consist of a small blade or tinsel of brass.
  • the upper face 12a of the non-compressible bar 12 housed in the groove 11 is set back relative to the active external surface or printing surface 10a of the blanket, so that a vacuum of height h is formed between said upper face 12a and the plane in which is located said printing surface 10a, so that the offset plate, installed on the plate cylinder 1, can unroll on said surface without encountering any relief.
  • a perforating net 15 is removably fixed, for example by gluing, on the printing cylinder 5, at the desired location or locations, so that, during the rotation of the blanket cylinder 4 and of said printing cylinder, the teeth or cutting elements of said perforating net come to bear on the bar 12 reinforcing the bottom of the groove or grooves 11.
  • an exemplary embodiment of a perforating net 15 may be used advantageously for the implementation of the method of the invention.
  • This perforating net comprises a base 15a consisting of a steel strip, the lower face of which is provided with a self-adhesive strip or layer 15b, the lower face of the latter being covered, before use, by a detachable protective film 15c. On its upper face, the base 15a is provided with teeth or cutting elements 15d aligned in the longitudinal direction of said base.
  • the distance h between the upper face 12a of the non-compressible bar 12 and the plane in which the active external face or printing surface 10a of the blanket 10 is included is barely less than or substantially equal to the height H of the perforating net 15 , so that sufficient pressure can be obtained from the end of the teeth or from the cutting edge of the cutting members 15d of said perforating thread on the upper face of said strip, making it possible to cut along the length of the teeth or a net perforation and perfect from the sheet of paper 16, without creating blisters or stain removal.
  • FIG. 10 illustrates the implementation of the punching method of the invention.
  • the sheet of paper 16 is pressed by the printing cylinder 5 provided with the perforating net 15, against the blanket 10 provided with a groove 11 equipped with a bar or non-compressible strip 12.
  • the locations where said perforating net and said groove are placed come into tangential contact, the ends of the teeth or the cutting edges of the cutting elements of said perforating net are pressed against the upper face of the bar or lamella 12, which leads to sectioning. according to the length of the teeth or the clean and perfect perforation of the sheet of paper.

Landscapes

  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (10)

1. Drucktuch für eine Rotationsdruckmaschine, z.B. Offsetmaschine, ausgestattet mit einer Perforiereinrichtung, dadurch gekennzeichnet, daß das Drucktuch (10) zumindest mit einer Nut (11) ausgestattet ist, die sich zur Druckfläche (10a) öffnet und auf deren Boden ein Steg oder eine Lamelle (12) aus einem harten und nicht kompressiblen Material hergestellt, angeordnet ist, welcher Steg eine obere Fläche (12a) besitzt, gegen welche die Perforier- oder Schneidelemente (15d) von Perforierleisten (15), die auf dem Druckzylinder (5) oder Preßzylinder oder Randzylinder der Maschine während des Druckvorgangs zur Anlage kommen.
2. Drucktuch für eine Rotationsdruckmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Steg (12) der den Boden der Nut oder jeder Nut (11) bildet, aus einem nicht zusammendrückbaren Material hergestellt ist, dessen Härte geringer ist, als diejenige von Zähnen oder Schneidelementen (15d) die Perforierleisten (15), die auf dem Druckerzylinder (5) der Maschine aufgeklebt sind.
3. Drucktuch für eine Rotationsdruckmaschine nach Anspruch 2, dadurch gekennzeichnet, daß der Steg (12), der den Boden der Nut oder jeder Nut (11) bildet, aus einer Messingfolie besteht.
4. Drucktuch für eine Rotationsdruckmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Boden und die Seiten der Nut oder jeder Nut (11) mit einer Lage aus Dichtmaterial beschichtet ist, beispielsweise einem Polyurethanfirnis.
5. Drucktuch für eine Rotationsdruckmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der nicht zusammendrückbare Steg (12) auf den Boden der Nut (11) mittels eines Klebbands (14) geklebt ist, das mit zwei entgegengesetzt gerichteten selbstklebenden Flächen ausgestattet ist.
6. Drucktuch für eine Rotationsdruckmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die obere Fläche (12a) des nicht zusammendrückbaren Stegs oder der Lamelle, der oder die in der Nut oder jeder Nut (11) angeordnet ist, bezüglich der Druckoberfläche (10a) des Drucktuchs (10) zurückgezogen angeordnet ist.
7. Drucktuch nach Anspruch 6, dadurch gekennzeichnet, daß der Abstand (h) der oberen Fläche (12a) des nicht zusammendrückbaren Stegs oder der Lamelle (12) und der Ebene, in der die Druckoberfläche (10)ä) des Drucktuchs (10) zusammengedrückt wird, geringfügig kleiner oder im wesentlichen gleich der Höhe (H) der Perforierleiste (15) ist, die dazu bestimmt ist, auf dem Druckzylinder (5) der Maschine installiert zu werden.
8. Verfahren zum Perforieren von Bögen während des Druckens für Rotationsdruckmaschinen, beispielsweise Offsetmaschinen, mit einem Trägerzylinder für ein Drucktuch (4) und einem Druckzylinder (5), Preßzylinder oder Randzylinder, gemäß welchem zumindest eine Perforierleiste (15) entfernbar auf dem genannten Druckzylinder derart befestigt ist, daß die Perforierung von Bögen (16) während ihres Durchgangs zwischen letzterem und dem genannten Drucktuch sichergestellt ist, dadurch gekennzeichnet, daß an der oder den Stellen, die in Kontakt mit den Schnittelementen (15d) des oder der Perforiersteg treten soll, das Drucktuch (10) mit einer oder mehreren Nuten (11) versehen ist, auf dessen oder deren Boden ein Steg oder eine Lamelle (12) aus hartem und nicht zusammendrückbaren Material angeordnet ist, derart, daß während des Druckvorgangs die genannten Schnittelemente gegen den nicht zusammendrückbaren Steg gedrückt werden, wodurch eine saubere und vollständige Perforierung der Papierbögen (16) sichergestellt ist.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß zwischen der oberen Fläche (12a) des nicht zusammendrückbaren Stegs (12) und der Ebene, in dem die Druck oberfläche (10a) des Drucktuchs (10) zusammengedrückt wird, ein Spalt vorgesehen ist, dessen Höhe (h) geringfügig kleiner oder im wesentlichen gleich der Höhe (H) der des Perforierleiste (15) ist, der vorbestimmt ist, auf dem Druckzylinder (5) der Maschine befestigt zu werden.
10. Verfahren nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, daß eine Beilage-Element (17) geringer Dicke zwischen dem Drucktuch (10) und dem Drucktuchträgerzylinder (4) unterhalb der Nut oder jeder Nut (11) vorgesehen ist, welche mit dem nicht zusammendrückbaren Steg (12) ausgestattet ist.
EP19870900174 1985-12-24 1986-12-23 Verfahren zum perforieren und drucktuch für rotationsdruckmaschine mit perforiereinrichtung, zum beispiel offsetpresse Expired - Lifetime EP0287563B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87900174T ATE57136T1 (de) 1985-12-24 1986-12-23 Verfahren zum perforieren und drucktuch fuer rotationsdruckmaschine mit perforiereinrichtung, zum beispiel offsetpresse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8519367 1985-12-24
FR8519367A FR2591943B1 (fr) 1985-12-24 1985-12-24 Procede de perforage et blanchet pour machine d'impression rotative equipee d'un dispositif ou d'un accessoire de perforage, par exemple pour machine offset

Publications (2)

Publication Number Publication Date
EP0287563A1 EP0287563A1 (de) 1988-10-26
EP0287563B1 true EP0287563B1 (de) 1990-10-03

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Application Number Title Priority Date Filing Date
EP19870900174 Expired - Lifetime EP0287563B1 (de) 1985-12-24 1986-12-23 Verfahren zum perforieren und drucktuch für rotationsdruckmaschine mit perforiereinrichtung, zum beispiel offsetpresse

Country Status (5)

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EP (1) EP0287563B1 (de)
AU (1) AU6839087A (de)
DE (1) DE3674807D1 (de)
FR (1) FR2591943B1 (de)
WO (1) WO1987003844A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2710291B1 (fr) * 1993-09-24 1995-11-17 Walter Fruttiger Procédé et dispositif pour la protection du blanchet d'une machine offset lors de l'utilisation de filets perforants, de filets coupeurs ou analogues.
GB0201471D0 (en) * 2002-01-23 2002-03-13 Post Press Products Ltd Device for document preparation
DE102007047172A1 (de) 2007-10-02 2009-04-09 Manroland Ag Gummisleeve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2234141B1 (de) * 1972-07-12 1973-11-29 Heidelberger Druckmaschinen Ag, 6900 Heidelberg

Also Published As

Publication number Publication date
FR2591943B1 (fr) 1988-03-18
EP0287563A1 (de) 1988-10-26
FR2591943A1 (fr) 1987-06-26
DE3674807D1 (de) 1990-11-08
AU6839087A (en) 1987-07-15
WO1987003844A1 (fr) 1987-07-02

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