WO1995008444A2 - Perforation or cutting device for an offset printing machine - Google Patents

Perforation or cutting device for an offset printing machine Download PDF

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Publication number
WO1995008444A2
WO1995008444A2 PCT/IB1994/000315 IB9400315W WO9508444A2 WO 1995008444 A2 WO1995008444 A2 WO 1995008444A2 IB 9400315 W IB9400315 W IB 9400315W WO 9508444 A2 WO9508444 A2 WO 9508444A2
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WO
WIPO (PCT)
Prior art keywords
blanket
counter
nets
adhesive
strips
Prior art date
Application number
PCT/IB1994/000315
Other languages
French (fr)
Other versions
WO1995008444A3 (en
Inventor
Walter Fruttiger
Original Assignee
Walter Fruttiger
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 Walter Fruttiger filed Critical Walter Fruttiger
Priority to EP94927779A priority Critical patent/EP0670782B1/en
Priority to DE69407394T priority patent/DE69407394T2/en
Publication of WO1995008444A2 publication Critical patent/WO1995008444A2/en
Publication of WO1995008444A3 publication Critical patent/WO1995008444A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • 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 method and a device for protecting the blanket of an offset machine when using perforating nets, cutting nets or the like.
  • a perforating net is in the form of a strip, generally metallic, having a lateral rim projecting toothed or sharpened, the face opposite to the rim carries an adhesive coating initially protected by a protective tape which remove at the time of use.
  • this temporary fixing being carried out by applying the perforating net to the model by its face adjacent to the rim after having removed the protective strip which initially covered the double-sided adhesive, - the passage of the model thus produced in the printing machine, after extraction of the protective strip from the adhesive layer of the different threads so that during this passage, the threads stick to the margin cylinder at the locations they must occupy and at the same time the double-sided adhesive is removed at the same time as the sheet to which it is stuck, due to the fact that the adhesive / metal adhesion of the threads is weaker than the adhesive / paper adhesion.
  • the invention therefore more particularly aims to eliminate these drawbacks.
  • the other face of the counter-support strips may be coated with a double-sided adhesive so as to be able to ensure installation in a sequence comprising the following steps:
  • the sheet used to make the model is previously passed through the printing machine equipped with perforating nets and / or cutting nets so that the perforation and / or cutting lines are visible in relief on the front of the sheet. .
  • the counter-support strips can be made of steel.
  • Figure 1 schematically shows an offset type printing machine
  • Figure 2 is a schematic perspective of a strip of abutment according to the invention.
  • Figure 3 is a cross section of the strip shown in Figure 1;
  • FIGS. 4 and 5 are schematic representations illustrating a sequence of laying perforating nets on the margin cylinder of the machine, FIG. 4 showing a model carrying the perforating nets on the back and FIG. 5 illustrating the passage of the model between the margin cylinder and blanket;
  • FIGS. 6 to 8 are schematic representations of a sequence of laying of counter-support strips on the blanket of the machine, this sequence comprising the production ( Figure 6) of a model ( Figure 7) and then the passage of this model between the margin cylinder and the blanket.
  • the invention is intended for machines of the offset or similar type comprising, as shown in FIG. 1, a plate cylinder 1 provided with ink rollers 2 and wetting rollers 3, a blanket 4 and a back pressure cylinder usually called margin cylinder 5.
  • the blank sheets to be printed which are initially stacked in a feeding station 6, are transmitted one by one in a margining area 7 before passing between the blanket 4 and the margin cylinder 5, place where the printing takes place.
  • the sheets 8 thus printed are then stacked in a receiving station 9.
  • perforating nets or cutting nets
  • the installation of perforating nets (or cutting nets) on the margin cylinder 5 can be carried out as illustrated in FIGS. 4 and 5 thanks to perforating nets 10 whose lower side (opposite to the cutting or perforating side) is coated with an adhesive layer 11, while the upper side is covered with a double-sided adhesive strip 12.
  • the operator first of all prints a sheet 8. Thanks to the double-sided adhesive 12, he sticks the perforating threads to the back of the sheet 8 where perform the perforations, the cutting or perforating elements being oriented towards the sheet 8 (FIG. 4). It then passes the model thus produced in the machine, the perforating nets 10 being placed on the side of the margin cylinder 5.
  • the perforating nets 10 are placed on the margin cylinder 5 at the suitable locations. The operator can therefore perform his printing operations with perforation or cutting.
  • the invention therefore proposes placing counter-support strips 13 on the blanket 5 at the locations on which the cutting or perforating elements of the threads 10 come to bear.
  • these strips 13 may be initially covered:
  • a layer of adhesive material 14 covered with a protective strip 15 which can be removed during use - on the other side, by a double-sided adhesive strip 16 (c ' that is to say a flexible strip carrying on its two faces an adhesive covering 17, 18), the adhesive covering 17 opposite the strip 13 being initially protected by a protective strip 19 which can be removed during use.
  • the operator passes a sheet 8 ′ through the machine so as to obtain a proof provided with the cutting lines and / or perforations 20, which are visible on the front of the sheet 8 '(here, in broken lines).
  • the operator After having removed the protective tapes 15, the operator fixes the counter-support strips 13 on the test 8 ′ by ensuring that their longitudinal axis of symmetry is substantially coincident with the cutting lines and / or perforation 20, the fixing of these strips 13 on the test 8 ′ then being obtained by means of the double-sided adhesive 16.
  • the operator passes the test 8 ′ with the machine provided with the counter-support strips 13, these being oriented towards the blanket side 4.
  • the double-sided adhesive strip 16 which remains glued to the sheet 8 ′ is detached from the strips 13 (the adhesion of the double-sided adhesive being stronger on the paper than on the strip 13).
  • the counter-support strips 13 are placed on the blanket 4 at suitable locations, vis-a-vis the cutting nets and / or the perforating nets 10.
  • the operator can then perform his printing operations with perforation and cutting.
  • the method described above may also include at least one pressure adjustment phase between the blanket 4 and the cylinder. margin 5. This adjustment can advantageously be carried out at the end of the laying of the perforating nets 10 and / or at the end of the laying of the counter-support strips 13.
  • the counter-support strips 13 may consist of a steel strip with a thickness of a few tenths of a millimeter (for example 0.2 mm) and a width of a few millimeters (for example 4 mm).
  • the operations of placing the counter-support strips are easy to perform: as with the perforating nets, the installation of the counter-support strips on the model can be carried out flat on a work table.
  • the use of the counter-support strips ensures protection of the blankets, and therefore an extension of the life of the latter.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Control Of Cutting Processes (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

The method of the invention consists in providing on the blanket (4) of the printing machine, at the locations where the perforating rules are bearing, counter-bearing bands, made of flexible but resistant material, said bands being secured temporarily to the surface of the blanket (4) by means of an adhesive coating applied to one of their faces. The invention avoids a premature wear of the blanket.

Description

DISPOSITIF DE PERFORATION OU DE COUPE POUR UNE MACHINE D'IMPRESSION OFFSETPUNCHING OR CUTTING DEVICE FOR AN OFFSET PRINTING MACHINE
La présente invention concerne un procédé et un dispositif pour la protection du blanchet d'une machine Offset lors de l'utilisation de filets perforants, de filets coupeurs ou analogues.The present invention relates to a method and a device for protecting the blanket of an offset machine when using perforating nets, cutting nets or the like.
On sait qu'un filet perforant se présente sous la forme d'une bande, généralement métallique, présentant un rebord latéral en saillie denté ou aiguisé dont la face opposée au rebord porte un revêtement adhésif initialement protégé par un ruban de protection que l'on retire au moment de l'utilisation.We know that a perforating net is in the form of a strip, generally metallic, having a lateral rim projecting toothed or sharpened, the face opposite to the rim carries an adhesive coating initially protected by a protective tape which remove at the time of use.
Ces filets perforants sont destinés à venir se coller sur le cylindre de marge qui vient normalement comprimer les feuilles à imprimer sur le blanchet.These perforating nets are intended to be stuck on the margin cylinder which normally compresses the sheets to be printed on the blanket.
En vue de faciliter la mise en place de ces filets sur le cylindre de marge, on a déjà proposé de disposer sur la face du filet adjacente au rebord en saillie, un ruban adhésif double face dont la face externe est initialement protégée par un ruban de protection (brevet FR 80 06862). Grâce à cette disposition, la mise en place des filets perforants sur le cylindre de marge peut s'obtenir en effectuant les opérations suivantes :In order to facilitate the positioning of these threads on the margin cylinder, it has already been proposed to have on the face of the thread adjacent to the protruding rim, a double-sided adhesive tape whose external face is initially protected by a ribbon of protection (patent FR 80 06862). Thanks to this arrangement, the placement of the perforating nets on the margin cylinder can be obtained by performing the following operations:
- l'impression sur une feuille de papier d'une maquette de l'épreuve que l'on souhaite réaliser,- the printing on a sheet of paper of a model of the test that one wishes to carry out,
- la fixation temporaire, sur cette maquette, des filets perforants, de telle sorte que les rebords se trouvent aux emplacements où se situent les perforations ou les découpes que l'on désire réaliser, cette fixation temporaire étant réalisée en appliquant le filet perforant sur la maquette par sa face adjacente au rebord après avoir ôté la bande de protection qui recouvrait initialement l'adhésif double face, - le passage de la maquette ainsi réalisée dans la machine d'impression, après extraction de la bande de protection de la couche adhésive des différents filets de manière à ce qu'en cours de ce passage, les filets viennent se coller sur le cylindre de marge aux emplacements qu'ils doivent occuper et qu'en même temps l'adhésif double face soit extrait en même temps que la feuille sur laquelle il se trouve collé, en raison du fait que l'adhérence adhésif/métal des filets est plus faible que l'adhérence adhésif/papier.- the temporary fixing, on this model, of the perforating nets, so that the flanges are at the locations where the perforations or the cuts which one wishes to make are located, this temporary fixing being carried out by applying the perforating net to the model by its face adjacent to the rim after having removed the protective strip which initially covered the double-sided adhesive, - the passage of the model thus produced in the printing machine, after extraction of the protective strip from the adhesive layer of the different threads so that during this passage, the threads stick to the margin cylinder at the locations they must occupy and at the same time the double-sided adhesive is removed at the same time as the sheet to which it is stuck, due to the fact that the adhesive / metal adhesion of the threads is weaker than the adhesive / paper adhesion.
En raison de la facilité de sa mise en oeuvre, ce procédé a largement contribué à généraliser l'emploi de filets perforants dans les machines d'impression Offset.Because of the ease of its implementation, this process has largely contributed to the widespread use of perforating nets in offset printing machines.
Toutefois, cette généralisation a fait apparaître un problème inhérent à cette technique qui tient au fait qu'à la longue les blanchets se trouvent prématurément usés voire même détériorés par 1 ' action des filets perforants ou coupeurs.However, this generalization has revealed a problem inherent in this technique which is due to the fact that in the long term the blankets are prematurely worn or even deteriorated by the action of the perforating or cutting nets.
En conséquence, ces blanchets doivent être fréquemment changés, ce qui pénalise cette technique notamment du fait : - du coût relativement élevé des blanchets,Consequently, these blankets must be changed frequently, which penalizes this technique in particular because: - the relatively high cost of blankets,
- du prix des interventions nécessaires pour le remplacement de ces blanchets,- the price of the interventions necessary for the replacement of these blankets,
- des immobilisations de l'Offset pendant ces interventions.- Offset fixed assets during these interventions.
L'invention a donc plus particulièrement pour objet de supprimer ces inconvénients.The invention therefore more particularly aims to eliminate these drawbacks.
A cet effet, elle propose de disposer sur le blanchet, aux emplacements où viennent porter les filets perforants, des bandes de contre-appui en matière flexible mais présentant une bonne dureté, ces bandes étant fixées temporairement à la surface du blanchet, grâce à un revêtement adhésif déposé sur l'une de leurs faces.For this purpose, it proposes to have on the blanket, at the locations where the perforating nets come, counter-support strips made of flexible material but having good hardness, these strips being temporarily fixed to the surface of the blanket, by means of a adhesive coating deposited on one of their faces.
Avantageusement, l'autre face des bandes de contre-appui pourra être revêtue d'un adhésif double face de manière à pouvoir assurer une mise en place selon une séquence comprenant les étapes suivantes :Advantageously, the other face of the counter-support strips may be coated with a double-sided adhesive so as to be able to ensure installation in a sequence comprising the following steps:
- la réalisation d'une maquette à l'aide d'une feuille sur le recto de laquelle les lignes de perforation et/ou de (pré)découpes sont indiquées,- the realization of a model using a sheet on the front of which the lines of perforation and / or (pre) cuts are indicated,
- la fixation temporaire sur le recto de cette maquette, grâce à l'adhésif double face, des bandes de contre- appui, celles-ci étant disposées de manière à suivre et à recouvrir les lignes de perforation et/ou de (pré)découpes,- temporary fixing on the front of this model, thanks to the double-sided adhesive, of the counter-support strips, these being arranged so as to follow and cover the lines of perforation and / or (pre) cuts ,
- le passage dans la machine d'impression de la maquette ainsi réalisée, après avoir ôté si elle existe la bande de protection de la couche adhésive, de manière à ce qu'au cours de ce passage,- les bandes de contre-appui viennent se coller sur le blanchet aux emplacements qu'elles doivent occuper, et que le ruban adhésif double face soit extrait en même temps que la feuille où il demeure collé, en raison de la différence de son pouvoir adhésif avec le papier de la maquette et le matériau constitutif des bandes de contre-appui.- the passage in the printing machine of the mock-up thus produced, after having removed if there is the protective strip of the adhesive layer, so that during this passage, - the counter-support strips come stick to the blanket in the places they must occupy, and the double-sided adhesive tape is removed at the same time as the sheet where it remains stuck, due to the difference of its adhesive power with the paper of the model and the material of the backing strips.
Avantageusement, la feuille utilisée pour réaliser la maquette est préalablement passée dans la machine d'impression équipée des filets perforants et/ou des filets coupeurs de sorte que les lignes de perforation et/ou de coupes sont visibles en relief sur le recto de la feuille.Advantageously, the sheet used to make the model is previously passed through the printing machine equipped with perforating nets and / or cutting nets so that the perforation and / or cutting lines are visible in relief on the front of the sheet. .
Bien entendu, les bandes de contre-appui pourront être réalisées en acier.Of course, the counter-support strips can be made of steel.
Un mode d'exécution de l'invention sera décrit ci-après, à titre d'exemple non limitatif, avec référence aux dessins annexés dans lesquels :An embodiment of the invention will be described below, by way of non-limiting example, with reference to the accompanying drawings in which:
La figure 1 représente schématiquement une machine d'impression de type Offset ;Figure 1 schematically shows an offset type printing machine;
La figure 2 est une perspective schématique d'une bande de contre-appui selon l'invention ;Figure 2 is a schematic perspective of a strip of abutment according to the invention;
La figure 3 est une coupe transversale de la bande représentée figure 1 ;Figure 3 is a cross section of the strip shown in Figure 1;
Les figures 4 et 5 sont des représentations schématiques illustrant une séquence de pose de filets perforants sur le cylindre de marge de la machine, la figure 4 montrant une maquette portant au verso les filets perforants et la figure 5 illustrant le passage de la maquette entre le cylindre de marge et le blanchet ;FIGS. 4 and 5 are schematic representations illustrating a sequence of laying perforating nets on the margin cylinder of the machine, FIG. 4 showing a model carrying the perforating nets on the back and FIG. 5 illustrating the passage of the model between the margin cylinder and blanket;
Les figures 6 à 8 sont des représentations schématiques d'une séquence de pose de bandes de contre-appui sur le blanchet de la machine, cette séquence comprenant la réalisation (figure 6) d'une maquette (figure 7) puis le passage de cette maquette entre le cylindre de marge et le blanchet.FIGS. 6 to 8 are schematic representations of a sequence of laying of counter-support strips on the blanket of the machine, this sequence comprising the production (Figure 6) of a model (Figure 7) and then the passage of this model between the margin cylinder and the blanket.
Comme précédemment mentionné, l'invention s'adresse aux machines de type Offset ou similaire comprenant, de la façon indiquée sur la figure 1 un cylindre porte-plaque 1 muni de rouleaux encreurs 2 et de rouleaux de mouillage 3, un blanchet 4 et un cylindre de contre pression appelé habituellement cylindre de marge 5.As previously mentioned, the invention is intended for machines of the offset or similar type comprising, as shown in FIG. 1, a plate cylinder 1 provided with ink rollers 2 and wetting rollers 3, a blanket 4 and a back pressure cylinder usually called margin cylinder 5.
Dans une machine de ce genre, les feuilles vierges à imprimer qui sont initialement empilées dans un poste d'alimentation 6, sont transmises une à une dans une aire de margeage 7 avant de passer entre le blanchet 4 et le cylindre de marge 5, lieu où s'effectue l'impression.In a machine of this kind, the blank sheets to be printed which are initially stacked in a feeding station 6, are transmitted one by one in a margining area 7 before passing between the blanket 4 and the margin cylinder 5, place where the printing takes place.
Les feuilles 8 ainsi imprimées viennent ensuite s'empiler dans un poste de réception 9.The sheets 8 thus printed are then stacked in a receiving station 9.
La mise en place de filets perforants (ou de filets coupeurs) sur le cylindre de marge 5 peut s'effectuer comme illustré sur les figures 4 et 5 grâce à des filets perforants 10 dont le côté inférieur (opposé au côté coupant ou perforant) est enduit d'une couche adhésive 11, tandis que le côté supérieur est recouvert d'une bande adhésive double face 12.The installation of perforating nets (or cutting nets) on the margin cylinder 5 can be carried out as illustrated in FIGS. 4 and 5 thanks to perforating nets 10 whose lower side (opposite to the cutting or perforating side) is coated with an adhesive layer 11, while the upper side is covered with a double-sided adhesive strip 12.
En vue d'effectuer cette mise en place, l'opérateur procède tout d'abord à l'impression d'une feuille 8. Grâce à l'adhésif double face 12, il colle les filets perforants au verso de la feuille 8 où doivent s'effectuer les perforations, les éléments coupants ou perforants étant orientés vers la feuille 8 (figure 4). Il passe ensuite la maquette ainsi réalisée dans la machine, les filets perforants 10 étant placés du côté du cylindre de marge 5.In order to carry out this positioning, the operator first of all prints a sheet 8. Thanks to the double-sided adhesive 12, he sticks the perforating threads to the back of the sheet 8 where perform the perforations, the cutting or perforating elements being oriented towards the sheet 8 (FIG. 4). It then passes the model thus produced in the machine, the perforating nets 10 being placed on the side of the margin cylinder 5.
Au cours de leur passage entre le blanchet 4 et le cylindre de marge 5, les filets perforants 10 viennent automatiquement se coller sur le cylindre de marge 5. Simultanément, la bande adhésive double face 12 qui reste collée sur la feuille 8, se détache des filets perforants 10 (figure 5) .During their passage between the blanket 4 and the margin cylinder 5, the perforating nets 10 automatically stick to the margin cylinder 5. Simultaneously, the double-sided adhesive strip 12 which remains stuck on the sheet 8, is detached from the perforating nets 10 (Figure 5).
Au terme du passage de la feuille 8, les filets perforants 10 se trouvent placés sur le cylindre de marge 5 aux emplacements convenables. L'opérateur peut donc effectuer ses opérations d'impression avec perforation ou découpe.At the end of the passage of the sheet 8, the perforating nets 10 are placed on the margin cylinder 5 at the suitable locations. The operator can therefore perform his printing operations with perforation or cutting.
Comme précédemment mentionné, l'inconvénient de ce mode de perforation ou de découpe consiste en ce qu'il provoque une usure prématurée (ou même des détériorations) du blanchet 5.As previously mentioned, the drawback of this method of perforation or cutting consists in that it causes premature wear (or even deterioration) of the blanket 5.
L'invention propose donc de placer sur le blanchet 5 des bandes de contre-appui 13 aux emplacements sur lesquelles viennent porter les éléments coupants ou perforants des filets 10.The invention therefore proposes placing counter-support strips 13 on the blanket 5 at the locations on which the cutting or perforating elements of the threads 10 come to bear.
Dans le but de faciliter la mise en place des bandes de contre-appui 12 sur le blanchet 4, ces bandes 13 pourront être initialement recouvertes :In order to facilitate the positioning of the counter-support strips 12 on the blanket 4, these strips 13 may be initially covered:
- d'un côté, par une couche en matériau adhésif 14 recouverte d'une bande de protection 15 que l'on peut ôter lors de l'utilisation, - de l'autre côté, par une bande adhésive double face 16 (c'est-à-dire une bande souple portant sur ses deux faces un revêtement adhésif 17, 18), le revêtement adhésif 17 opposé à la bande 13 étant initialement protégé par une bande de protection 19 que l'on peut ôter lors de l'utilisation.- on one side, by a layer of adhesive material 14 covered with a protective strip 15 which can be removed during use, - on the other side, by a double-sided adhesive strip 16 (c ' that is to say a flexible strip carrying on its two faces an adhesive covering 17, 18), the adhesive covering 17 opposite the strip 13 being initially protected by a protective strip 19 which can be removed during use.
La mise en place des bandes de contre-appui 13 précédemment décrites peut être avantageusement effectuée comme suit :The establishment of the abutment strips 13 previously described can advantageously be carried out as follows:
Une fois les filets perforants 10 disposés sur le cylindre de marge 5, par exemple de la façon illustrée sur les figues 4 et 5, l'opérateur passe une feuille 8' dans la machine de manière à obtenir une épreuve munie des lignes de découpes et/ou de perforations 20, lesquelles sont visibles au recto de la feuille 8' (ici, en traits interrompus ) .Once the perforating nets 10 have been placed on the margin cylinder 5, for example as illustrated in figs 4 and 5, the operator passes a sheet 8 ′ through the machine so as to obtain a proof provided with the cutting lines and / or perforations 20, which are visible on the front of the sheet 8 '(here, in broken lines).
Après avoir ôté les rubans de protection 15, l'opérateur fixe les bandes de contre-appui 13 sur l'épreuve 8' en faisant en sorte que leur axe longitudinal de symétrie se trouve sensiblement en coïncidence avec les lignes de découpe et/ou de perforation 20, la fixation de ces bandes 13 sur l'épreuve 8' étant alors obtenue grâce à l'adhésif double face 16.After having removed the protective tapes 15, the operator fixes the counter-support strips 13 on the test 8 ′ by ensuring that their longitudinal axis of symmetry is substantially coincident with the cutting lines and / or perforation 20, the fixing of these strips 13 on the test 8 ′ then being obtained by means of the double-sided adhesive 16.
Une fois cette opération terminée, l'opérateur passe à la machine l'épreuve 8' munie des bandes de contre-appui 13, celles-ci étant orientées du côté du blanchet 4.Once this operation has been completed, the operator passes the test 8 ′ with the machine provided with the counter-support strips 13, these being oriented towards the blanket side 4.
Au cours de leur passage entre le blanchet 4 et le cylindre de marge 5, les bandes de contre-appui 13 viennent automatiquement se coller sur le blanchet 4.During their passage between the blanket 4 and the margin cylinder 5, the counter-support strips 13 automatically stick to the blanket 4.
Parallèlement, la bande adhésive double face 16 qui reste collée sur la feuille 8 ' , se détache des bandes 13 (l'adhérence de l'adhésif double face étant plus forte sur le papier que sur la bande 13 ) .At the same time, the double-sided adhesive strip 16 which remains glued to the sheet 8 ′ is detached from the strips 13 (the adhesion of the double-sided adhesive being stronger on the paper than on the strip 13).
Au terme du passage de l'épreuve, les bandes de contre- appui 13 se trouvent placées sur le blanchet 4 aux emplacements appropriés, vis-à-vis des filets de découpes et/ou des filets perforants 10.At the end of the test, the counter-support strips 13 are placed on the blanket 4 at suitable locations, vis-a-vis the cutting nets and / or the perforating nets 10.
L'opérateur peut alors effectuer ses opérations d'impression avec perforation et découpe.The operator can then perform his printing operations with perforation and cutting.
Il convient de noter qu'il faut tenir compte de l'épaisseur des filets perforants 10 et des bandes de contre-appui 13, le procédé précédemment décrit pourra en outre comprendre au moins une phase de réglage de pression entre le blanchet 4 et le cylindre de marge 5. Ce réglage pourra être avantageusement effectué en fin de pose des filets perforants 10 et/ou en fin de pose des bandes de contre-appui 13.It should be noted that the thickness of the perforating threads 10 and the counter-support strips 13 must be taken into account, the method described above may also include at least one pressure adjustment phase between the blanket 4 and the cylinder. margin 5. This adjustment can advantageously be carried out at the end of the laying of the perforating nets 10 and / or at the end of the laying of the counter-support strips 13.
Avantageusement, les bandes de contre-appui 13 pourront consister en une bande d'acier d'épaisseur de quelques dixièmes de millimètres (par exemple 0,2 mm) et de largeur de quelques millimètres (par exemple 4 mm).Advantageously, the counter-support strips 13 may consist of a steel strip with a thickness of a few tenths of a millimeter (for example 0.2 mm) and a width of a few millimeters (for example 4 mm).
Les avantages du procédé précédemment décrit apparaissent clairement.The advantages of the method described above are clearly apparent.
Il peut s'utiliser sur toutes les machines d'impression de type Offset, même celles qui ne permettent pas un accès suffisant au blanchet et au cylindre de marge.It can be used on all offset printing machines, even those that do not allow sufficient access to the blanket and the margin cylinder.
Il supprime toute intervention directe de l'opérateur sur ces cylindres et les inconvénients qui en découlent.It eliminates any direct operator intervention on these cylinders and the resulting drawbacks.
Les opérations de mise en place des bandes de contre- appui sont faciles à exécuter : de même que pour les filets perforants, la pose des bandes de contre-appui sur la maquette peut s'effectuer à plat sur une table de travail. Bien entendu, l'usage des bandes de contre-appui assure une protection des blanchets, et donc un allongement de la durée de vie de ces derniers. The operations of placing the counter-support strips are easy to perform: as with the perforating nets, the installation of the counter-support strips on the model can be carried out flat on a work table. Of course, the use of the counter-support strips ensures protection of the blankets, and therefore an extension of the life of the latter.

Claims

Revendications claims
1. Procédé pour la protection du blanchet d'une machine Offset lors de l'utilisation de filets perforants, de filets coupeurs ou analogues, caractérisé en ce qu'il consiste à disposer, sur le blanchet (4), aux emplacements où viennent porter les filets perforants, des bandes de contre-appui (13) en matière flexible mais résistantes, ces bandes étant fixées temporairement à la surface du blanchet grâce à un revêtement adhésif (14) déposé à l'une de leurs faces.1. A method for protecting the blanket of an offset machine when using perforating nets, cutting nets or the like, characterized in that it consists in placing, on the blanket (4), at the places where they come to bear perforating nets, counter-support strips (13) made of flexible but resistant material, these strips being temporarily fixed to the surface of the blanket by means of an adhesive coating (14) deposited on one of their faces.
2. Procédé selon la revendication 1, caractérisé en ce que 1 'autre face des bandes de contre- appui (13) pourra être revêtue d'un adhésif double face (16) de manière à pouvoir assurer une mise en place selon une séquence comprenant les étapes suivantes :2. Method according to claim 1, characterized in that the other side of the counter-support strips (13) can be coated with a double-sided adhesive (16) so as to be able to ensure positioning according to a sequence comprising the following steps:
- la réalisation d'une maquette à l'aide d'une feuille ( 8 ' ) sur le recto de laquelle les lignes de perforation et/ou de (pré)découpes (20) sont indiquées,- making a model using a sheet (8 ') on the front of which the perforation lines and / or (pre) cuts (20) are indicated,
- la fixation temporaire sur le recto de cette maquette, grâce à l'adhésif double face (16), des bandes de contre-appui (13), celles-ci étant disposées de manière à suivre et à recouvrir les lignes de perforation et/ou de (pré)découpes (20),- the temporary fixing on the front of this model, using the double-sided adhesive (16), of the counter-support strips (13), these being arranged so as to follow and cover the perforation lines and / or (pre) cuts (20),
- le passage dans la machine d'impression de la maquette ainsi réalisée, après avoir ôté si elle existe la bande de protection (15) de la couche adhésive, de manière à ce qu'au cours de ce passage, les bandes de contre- appui (13) viennent se coller sur le blanchet (4) aux emplacements qu'ils doivent occuper, et que le ruban adhésif double face (16) soit extrait en même temps que la feuille (8' ) où il demeure collé, en raison de la différence de son pouvoir adhésif avec le papier de la maquette et le matériau constitutif des bandes de contre-appui. - The passage through the printing machine of the mock-up thus produced, after removing if there is the protective strip (15) of the adhesive layer, so that during this passage, the counter-strips support (13) are bonded to the blanket (4) at the locations they must occupy, and the double-sided adhesive tape (16) is removed at the same time as the sheet (8 ') where it remains glued, due of the difference in its adhesive power with the paper of the model and the material of the counter-support strips.
3. Procédé selon la revendication 2, caractérisé en ce que la feuille ( 8 ' ) utilisée pour réaliser la maquette est préalablement passée dans la machine d'impression équipée des filets perforants et/ou des filets coupeurs ( 20) de sorte que les lignes de perforation et/ou de découpe sont visibles en relief sur le recto de la feuille.3. Method according to claim 2, characterized in that the sheet (8 ') used to make the model is previously passed through the printing machine equipped with perforating nets and / or cutting nets (20) so that the lines perforation and / or cutting are visible in relief on the front of the sheet.
4. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il comprend en outre une phase de réglage des pressions entre le blanchet (4) et le cylindre de marge ( 5 ) , préalablement au passage de la maquette dans la machine.4. Method according to one of the preceding claims, characterized in that it further comprises a pressure adjustment phase between the blanket (4) and the margin cylinder (5), prior to the passage of the model in the machine .
5. Dispositif pour la protection du blanchet conformément au procédé selon 1 'une des revendications précédentes, caractérisé en ce qu' il comprend au moins une bande de contre-appui ( 13 ) dont une face est munie de moyens adhésifs (14) de manière à pouvoir se fixer sur le blanchet (4) de la machine en un emplacement où vient porter un filet perforant ou un filet coupeur.5. Device for protecting the blanket according to the method according to one of the preceding claims, characterized in that it comprises at least one counter-support strip (13), one face of which is provided with adhesive means (14) so to be able to be fixed on the blanket (4) of the machine in a place where comes to carry a perforating net or a cutting net.
6. Dispositif selon la revendication 5, caractérisé en ce que la face de la bande de contre-appui (13) qui est située à l'opposé des susdits moyens adhésifs est revêtue d'un adhésif double face (16).6. Device according to claim 5, characterized in that the face of the backing strip (13) which is located opposite the above adhesive means is coated with a double-sided adhesive (16).
7. Dispositif selon la revendication 6, caractérisé en ce que les susdits moyens adhésifs (14) et le susdit adhésif double face (16) sont respectivement protégés par des bandes de protection (15, 19) que l'on peut ôter au moment de l'utilisation.7. Device according to claim 6, characterized in that the above adhesive means (14) and the above double-sided adhesive (16) are respectively protected by protective strips (15, 19) which can be removed when use.
8. Dispositif selon l'une des revendications 5 à 7, caractérisé en ce que la bande de contre-appui (13) est en acier.8. Device according to one of claims 5 to 7, characterized in that the counter-support strip (13) is made of steel.
9. Dispositif selon la revendication 8, caractérisé en ce que la bande d'acier présente une épaisseur de quelques dixièmes de millimètres et une largeur de quelques millimètres. 9. Device according to claim 8, characterized in that the steel strip has a thickness of a few tenths of a millimeter and a width of a few millimeters.
PCT/IB1994/000315 1993-09-24 1994-09-26 Perforation or cutting device for an offset printing machine WO1995008444A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP94927779A EP0670782B1 (en) 1993-09-24 1994-09-26 Perforation or cutting device for an offset printing machine
DE69407394T DE69407394T2 (en) 1993-09-24 1994-09-26 PERFORATING OR CUTTING DEVICE FOR AN OFFSET PRINTING MACHINE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9311632A FR2710291B1 (en) 1993-09-24 1993-09-24 Method and device for protecting the blanket of an offset machine when using perforating nets, cutting nets or the like.
FR93/11632 1993-09-24

Publications (2)

Publication Number Publication Date
WO1995008444A2 true WO1995008444A2 (en) 1995-03-30
WO1995008444A3 WO1995008444A3 (en) 1995-04-27

Family

ID=9451393

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1994/000315 WO1995008444A2 (en) 1993-09-24 1994-09-26 Perforation or cutting device for an offset printing machine

Country Status (6)

Country Link
EP (1) EP0670782B1 (en)
AT (1) ATE161225T1 (en)
DE (1) DE69407394T2 (en)
ES (1) ES2113679T3 (en)
FR (1) FR2710291B1 (en)
WO (1) WO1995008444A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0739731A1 (en) * 1995-04-25 1996-10-30 Ruprecht Handels AG Impression device for realising perforations or die-cuts on sheet printing presses
US5623874A (en) * 1994-04-14 1997-04-29 Ruprecht Handels Ag Counter-pressure means for effectuating perforations and/or punchings at offset sheet printing machines
WO2008055516A1 (en) * 2006-11-07 2008-05-15 Cito Printline Gmbh Apparatus for perforating, scoring or punching for rotary printing presses

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011141041A1 (en) * 2010-05-14 2011-11-17 Cito-System Gmbh Device for perforating and/or fluting and/or punching for rotary printing presses

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1175092A (en) * 1967-03-03 1969-12-23 Druckmaschinenwerk Victoria Ve Method and Device for Perforation During Printing
FR2491448A3 (en) * 1980-10-03 1982-04-09 Garcia Cervera Julian Positioner for stamping counter punch - is profiled to suit counter punch and held by double adhesive facings
FR2591943A1 (en) * 1985-12-24 1987-06-26 Orsi Gilbert PUNCHING PROCESS AND BLANKET FOR ROTARY PRINTING MACHINE EQUIPPED WITH A PUNCHING DEVICE OR ACCESSORY, FOR EXAMPLE FOR OFFSET MACHINE

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1561521B1 (en) * 1961-08-17 1971-03-11 Emil Wentzel Profile strips for setting up the punching and groove forms on punching machines for simultaneous punching and grooving of cardboard boxes or the like.
FR2479094A1 (en) * 1980-03-27 1981-10-02 Steve Christian PERFORATING THREAD OR THE LIKE USED ESPECIALLY ON PRINTING MACHINES SUCH AS OFFSET MACHINES, AND ITS PROCESS FOR IMPLEMENTING THESE MACHINES

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1175092A (en) * 1967-03-03 1969-12-23 Druckmaschinenwerk Victoria Ve Method and Device for Perforation During Printing
FR2491448A3 (en) * 1980-10-03 1982-04-09 Garcia Cervera Julian Positioner for stamping counter punch - is profiled to suit counter punch and held by double adhesive facings
FR2591943A1 (en) * 1985-12-24 1987-06-26 Orsi Gilbert PUNCHING PROCESS AND BLANKET FOR ROTARY PRINTING MACHINE EQUIPPED WITH A PUNCHING DEVICE OR ACCESSORY, FOR EXAMPLE FOR OFFSET MACHINE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0670782A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5623874A (en) * 1994-04-14 1997-04-29 Ruprecht Handels Ag Counter-pressure means for effectuating perforations and/or punchings at offset sheet printing machines
EP0739731A1 (en) * 1995-04-25 1996-10-30 Ruprecht Handels AG Impression device for realising perforations or die-cuts on sheet printing presses
WO2008055516A1 (en) * 2006-11-07 2008-05-15 Cito Printline Gmbh Apparatus for perforating, scoring or punching for rotary printing presses

Also Published As

Publication number Publication date
ATE161225T1 (en) 1998-01-15
DE69407394D1 (en) 1998-01-29
ES2113679T3 (en) 1998-05-01
EP0670782A1 (en) 1995-09-13
EP0670782B1 (en) 1997-12-17
WO1995008444A3 (en) 1995-04-27
FR2710291A1 (en) 1995-03-31
FR2710291B1 (en) 1995-11-17
DE69407394T2 (en) 1998-05-07

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