EP0114446B1 - Flexible sheet attaching device for a printing cylinder of a rotary printing machine - Google Patents

Flexible sheet attaching device for a printing cylinder of a rotary printing machine Download PDF

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Publication number
EP0114446B1
EP0114446B1 EP83201871A EP83201871A EP0114446B1 EP 0114446 B1 EP0114446 B1 EP 0114446B1 EP 83201871 A EP83201871 A EP 83201871A EP 83201871 A EP83201871 A EP 83201871A EP 0114446 B1 EP0114446 B1 EP 0114446B1
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EP
European Patent Office
Prior art keywords
cylinder
blanket
slot
sheet
width
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
Application number
EP83201871A
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German (de)
French (fr)
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EP0114446A2 (en
EP0114446A3 (en
Inventor
Hartmut Karl Sauer
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.)
KBA Notasys SA
Original Assignee
De la Rue Giori SA
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Publication date
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Priority to AT83201871T priority Critical patent/ATE20326T1/en
Publication of EP0114446A2 publication Critical patent/EP0114446A2/en
Publication of EP0114446A3 publication Critical patent/EP0114446A3/en
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Publication of EP0114446B1 publication Critical patent/EP0114446B1/en
Expired legal-status Critical Current

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    • 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
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/125—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end on a curvilinear path, e.g. by winding on a roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the present invention relates to a device for fixing one end of a sheet of flexible and folding-resistant material, such as a blanket, to a cylinder of a rotary printing machine, the cylinder being provided with a slot. radial insertion extending parallel to the axis of the cylinder, intended for fixing the folded end of the sheet.
  • Such a device is described in DE-PS.22.52.949.
  • the wall of the slot parallel to the axis is provided with a fixing device for one of the ends of the sheet.
  • the fixing device has a chamfered edge inserted into the body of the cylinder.
  • a border strip attached to the end of the sheet is slipped into this edge. To prevent it from falling outside, this strip must be protected by a safety device which complicates the fixing of the end of the sheet.
  • the present invention overcomes these drawbacks by providing a device for fixing and securing directly to the cylinder body in a simple manner the end of a flexible sheet and resistant to folding.
  • the fixing device is characterized in that the radial slot in its inner part forms a housing whose cross section widens towards the axis of the cylinder and whose inner bottom has, in the peripheral direction, a width greater than the width of the folded part of the end of the sheet, that one of the walls of the radial slot is provided with a receiving groove parallel to the axis of the cylinder forming an acute angle with the part of said wall extending outwards and that the maximum width of the external part of the radial slot extending beyond the receiving groove is less than the width of the folded part of the end of the sheet .
  • the advantages of this device are above all linked to its simplicity which makes it possible to ensure the fixing of one end of a flexible sheet and resistant to folding, for example a blanket, on the body of a cylinder without it being necessary. to have recourse to an additional device to prevent that the fixed end is detached involuntarily, for example by gravity or under the action of the centrifugal force.
  • the end of the sheet to be fixed is folded and preferably reinforced by a steel blade so that it is rigid and it is pushed into the insertion slot, the folding edge first and the folded part against the wall provided with the receiving groove.
  • the folded end behaves like a spring which relaxes as soon as its free end is facing the receiving groove, from this moment the sheet is no longer pushed but slightly pulled outward from the slot so that the entire folded portion is engaged in the groove.
  • the sheet is pushed as previously towards the inside of the slot until the folded part leaves the groove and is in the enlarged housing inside which the end unfolds. completely the part engaged in the slot can be removed.
  • the walls of the slot may be parallel to the median plane of the slot which is simultaneously a radial plane of the cylinder.
  • om can also use the cylinder in printing machines, for example rotary machines for intaglio printing, the cylinders of which have a linear load. particularly high.
  • the blankets covering the printing cylinders of these machines consist of a canvas or a fine fabric covered externally with a layer of rubber. The total thickness of such a blanket is of the order of 0.4 to 0.7 mm.
  • the sheet 3 to be fixed on the mantle 1 of the cylinder 2 of a printing machine is a blanket with a thickness of approximately 0.5 mm.
  • the cylinder 2 is provided with an insertion slot 6 open on the mantle 1 so as to be able to bring one or both ends 7, 8 of the blanket 3 to a fixing device 9, 11.
  • the insertion slot 6 preferably has two walls 12, 13 parallel to each other and parallel to the median plane of the slot 6 represented by the line r which is simultaneously a radial plane of the cylinder.
  • the width d of this slot 6 is approximately 4 mm.
  • the insertion slot 6 is wide enough to allow it to slide and push towards the center of the cylinder the folded and reinforced end 7 of the blanket 3, reinforcement consisting of a spring steel strip 14 of a thickness , for example 0.2 mm and 5 mm wide, glued to the folded end of the blanket 3.
  • the opening angle y between the end 7 and the blanket 3 should be only a few degrees ( 5-15 °) when inserting the folded end 7 into the insertion slot 6 (fig. 3).
  • the radial slot 6 forms at its inner part a housing 16 parallel to the axis of the cylinder 2, the cross section of which widens inwards.
  • the housing 16 is limited by an inclined part 17 of the wall 12 and the second wall 13 of the slot 6.
  • the acute angle a between the external part of the wall 12 and the inclined part is of the order of 20 °.
  • the enlarged housing 16 opens for example on a cylindrical hole 18 for tension pivot, hole coaxial with the cylinder, and where the tension pivot 19 is housed.
  • the tension pivot 19 has a groove 21 parallel to the axis of the cylinder 2 and used for fixing the second reinforced end 8 of the blanket 3.
  • a groove 22 has been inserted parallel to the axis of the cylinder which extends over the entire length of cylinder 2 and whose profile is rectangular.
  • the median plane 23 of the groove shows, with respect to wall 12, an opening angle ⁇ varying between 5 ° and 45 °, but preferably being 30 °.
  • the width c of the groove 22 is chosen so that there is still just enough room for the reinforced end 7 of the blanket 3.
  • the depth g of the receiving groove 22 is slightly greater than the width of the first reinforced end 7 of the blanket 3.
  • the blanket 3 is folded at its first end 7, just behind the spring steel strip 14, so as to be against the side of the insertion slot 6 in which the receiving groove 22 is located (fig. 3 ). In doing so, the blanket 3 rests so that its outer side 26 is against the mantle 1 of the cylinder 2. Then the folded end 7, in this folded form, is inserted, from the mantle 1, into the slot Insertion 6, using a piece of thin sheet metal or a spatula. It is advisable to contribute to a good insertion by repeatedly pushing the folded end along the insertion crack 6. Since, during folding, the width 1 of the folded end 7 has been chosen so to be barely greater than the width d of the insertion slot 6, the folded end 7, by sliding in the insertion slot 6, can only open very slightly.
  • the opening angle y of the folded end 7 increases under the effect of the return force of the blanket 3 and the front part 27 slides in the receiving groove 22. If one then pulls, towards the circumference of the cylinder, on the blanket 3 now hooked, the first end 7 enters the groove longitudinal 22 up to the height of the blanket folding edge 3. The blanket 3 is then folded down and its second end 8 is introduced into the groove 21 of the tension pivot 19, passing through the insertion slot 6. By turning the tension pivot 19, the blanket 3 is stretched, in a known manner.
  • the blanket 3 can of course rest on a covering 4.
  • the fixing device can also be used for other applications, for example for fixing the blankets to a blanket cylinder of an offset printing machine provided that the thickness of the blanket is not too much large to be foldable.
  • a blanket having a thickness of 0.4 to 0.7 mr can in fact be fixed to the cylinder by means of the device described above.

Abstract

The cylinder is provided with a radial insertion slot forming in its inner portion a widened cavity. One of the walls of the slot is provided with a receiving groove of which the median plane forms with the wall of the slot an acute angle of the order of 30 DEG . The folded end reinforced by a spring-steel blade of the blanket is inserted into the slot and thrusted by using a thin piece of sheet-metal or a spatula until, due to the return force of the blanket, it engages the opening of the groove. Then, the blanket is pulled outwards so that the reinforced end penetrates into the groove. Subsequently, the second end of the blanket is attached in the known fashion to a stretching pivot. The length, in the peripheral direction, of the bottom of the widened cavity is greater than the width of the folded end of the blanket, and the width of the outer portion of the radial slot is smaller than the width of the folded end.

Description

La présente invention concerne un dispositif de fixation d'une extrémité d'une feuille en matériau souple et résistant au pliage, telle qu'un blanchet, sur un cylindre de machine d'impression rotative, le cylindre étant muni d'une fente d'insertion radiale s'étendant parallèlement à l'axe du cylindre, destinée à la fixation de l'extrémité repliée de la feuille.The present invention relates to a device for fixing one end of a sheet of flexible and folding-resistant material, such as a blanket, to a cylinder of a rotary printing machine, the cylinder being provided with a slot. radial insertion extending parallel to the axis of the cylinder, intended for fixing the folded end of the sheet.

Un tel dispositif est décrit dans le DE-PS.22.52.949. La paroi de la fente parallèle à l'axe est dotée d'un dispositif de fixation pour l'une des extrémités de la feuille. Le dispositif de fixation est doté d'une arête chanfreinée insérée dans le corps du cylindre. Un listel de bordure fixé à l'extrémité de la feuille est glissé dans cette arête. Pour éviter qu'il ne tombe à l'extérieur, ce listel doit être protégé par un dispositif de sécurité ce qui complique la fixation de l'extrémité de la feuille.Such a device is described in DE-PS.22.52.949. The wall of the slot parallel to the axis is provided with a fixing device for one of the ends of the sheet. The fixing device has a chamfered edge inserted into the body of the cylinder. A border strip attached to the end of the sheet is slipped into this edge. To prevent it from falling outside, this strip must be protected by a safety device which complicates the fixing of the end of the sheet.

La présente invention permet de pallier ces inconvénients en proposant un dispositif permettant de fixer et d'assurer directement sur le corps du cylindre de manière simple l'extrémité d'une feuille souple et résistant au pliage.The present invention overcomes these drawbacks by providing a device for fixing and securing directly to the cylinder body in a simple manner the end of a flexible sheet and resistant to folding.

Le dispositif de fixation selon l'invention est caractérisé par le fait que la fente radiale dans sa partie intérieure forme un logement dont la section transversale s'élargit vers l'axe du cylindre et dont le fond intérieur a, dans le sens périphérique, une largeur plus grande que la largeur de la partie repliée de l'extrémité de la feuille, que l'une des parois de la fente radiale est munie d'une rainure de réception parallèle à l'axe du cylindre formant un angle aigu avec la partie de ladite paroi s'étendant vers l'extérieur et que la largeur maximale de la partie extérieure de la fente radiale s'étendant au-delà de la rainure de réception est inférieure à la largeur de la partie repliée de l'extrémité de la feuille.The fixing device according to the invention is characterized in that the radial slot in its inner part forms a housing whose cross section widens towards the axis of the cylinder and whose inner bottom has, in the peripheral direction, a width greater than the width of the folded part of the end of the sheet, that one of the walls of the radial slot is provided with a receiving groove parallel to the axis of the cylinder forming an acute angle with the part of said wall extending outwards and that the maximum width of the external part of the radial slot extending beyond the receiving groove is less than the width of the folded part of the end of the sheet .

Les avantages de ce dispositif sont surtout liés à sa simplicité qui permet d'assurer la fixation d'une extrémité d'une feuille souple et résistant au pliage, par exemple un blanchet, sur le corps d'un cylindre sans qu'il soit nécessaire d'avoir recours à un dispositif supplémentaire pour empêcher que l'extrémité fixée se détache involontairement, par exemple par gravité ou sous l'action de la force centrifuge. L'extrémité de la feuille à fixer est repliée et de préférence renforçée par une lame d'acier pour qu'elle soit rigide et elle est poussée dans la fente d'insertion, l'arête de pliage en premier et la partie repliée contre la paroi munie de la rainure de réception. Sous l'effet de la résistance au pliage de la feuille l'extrémité repliée se comporte comme un ressort qui se détend dés que son extrémité libre se trouve face à la rainure de réception, dés ce moment la feuille n'est plus poussée mais légèrement tirée vers l'extérieur de la fente de sorte que la totalité de la partie repliée soit engagée dans la rainure. Pour libérer l'extrémité fixée dans la rainure on pousse comme précédemment la feuille vers l'intérieur de la fente jusqu'à ce que la partie repliée quitte la rainure et se trouve dans le logement élargi à l'intérieur duquel l'extrémité se déplie complètement ainsi la partie engagée dans la fente peut être retirée.The advantages of this device are above all linked to its simplicity which makes it possible to ensure the fixing of one end of a flexible sheet and resistant to folding, for example a blanket, on the body of a cylinder without it being necessary. to have recourse to an additional device to prevent that the fixed end is detached involuntarily, for example by gravity or under the action of the centrifugal force. The end of the sheet to be fixed is folded and preferably reinforced by a steel blade so that it is rigid and it is pushed into the insertion slot, the folding edge first and the folded part against the wall provided with the receiving groove. Under the effect of the folding resistance of the sheet, the folded end behaves like a spring which relaxes as soon as its free end is facing the receiving groove, from this moment the sheet is no longer pushed but slightly pulled outward from the slot so that the entire folded portion is engaged in the groove. To release the end fixed in the groove, the sheet is pushed as previously towards the inside of the slot until the folded part leaves the groove and is in the enlarged housing inside which the end unfolds. completely the part engaged in the slot can be removed.

Les parois de la fente peuvent être parallèles au plan médian de la fente qui est simultanément un plan radial du cylindre. Ainsi, et en raison du léger affaiblissement du corps du cylindre dû à la clavette longitudinale de support, om peut également utiliser le cylindre dans des machines d'impression, par exemple des machines rotatives pour impression taille-douce dont les cylindres présentent une charge linéaire particulièrement élevée. Les blanchets couvrant les cylindres d'impression de ces machines sont constitués d'une toile ou d'un tissu de fin recouvert extérieurement d'une couche de caoutchouc. L'épaisseur totale d'un tel blanchet est de l'ordre de 0,4 à 0,7 mm.The walls of the slot may be parallel to the median plane of the slot which is simultaneously a radial plane of the cylinder. Thus, and due to the slight weakening of the cylinder body due to the longitudinal support key, om can also use the cylinder in printing machines, for example rotary machines for intaglio printing, the cylinders of which have a linear load. particularly high. The blankets covering the printing cylinders of these machines consist of a canvas or a fine fabric covered externally with a layer of rubber. The total thickness of such a blanket is of the order of 0.4 to 0.7 mm.

L'invention sera décrite plus en détail à l'aide du dessin annexé représentant une exécution.

  • La figure 1 représente une vue en coupe transversale partielle d'un dispositif de fixation montrant l'extrémité de la feuille fixée.
  • La figure 2 représente un détail de la figure 1 agrandie.
  • La figure 3 représente une vue analogue à celle de la figure 1, l'extrémité de la feuille n'étant pas encore fixée.
The invention will be described in more detail with the aid of the appended drawing representing an embodiment.
  • Figure 1 shows a partial cross-sectional view of a fixing device showing the end of the fixed sheet.
  • Figure 2 shows a detail of Figure 1 enlarged.
  • Figure 3 shows a view similar to that of Figure 1, the end of the sheet not yet fixed.

La feuille 3 à fixer sur le manteau 1 du cylindre 2 d'une machine d'impression est un blanchet d'une épaisseur d'environ 0,5 mm. Le cylindre 2 est doté d'une fente d'insertion 6 ouverte sur le manteau 1 afin de pouvoir amener l'une ou les deux extrémités 7, 8 du blanchet 3 à un dispositif de fixation 9, 11.The sheet 3 to be fixed on the mantle 1 of the cylinder 2 of a printing machine is a blanket with a thickness of approximately 0.5 mm. The cylinder 2 is provided with an insertion slot 6 open on the mantle 1 so as to be able to bring one or both ends 7, 8 of the blanket 3 to a fixing device 9, 11.

La fente d'insertion 6 a de préférence deux parois 12, 13 parallèles entre elles et parallèles au plan médian de la fente 6 représenté par la ligne r qui est simultanément un plan radial du cylindre. La largeur d de cette fente 6 est d'environ 4 mm. La fente d'insertion 6 est suffisamment large pour permettre d'y glisser et de pousser en direction du centre du cylindre l'extrémité pliée et renforcée 7 du blanchet 3, renforcement consistant en une lamelle d'acier à ressorts 14 d'une épaisseur, de par exemple 0,2 mm et d'une largeur de 5 mm, collée sur l'extrémité repliée du blanchet 3. L'angle d'ouverture y entre l'extrémité 7 et le blanchet 3 ne devrait accuser que quelques degrés (5-15°) lors de l'insertion de l'extrémité pliée 7 dans la fente d'insertion 6 (fig. 3). La fente radiale 6 forme à sa partie intérieure un logement 16 parallèle à l'axe du cylindre 2, dont la section transversale s'élargit vers l'intérieur. Le logement 16 est limité par une partie inclinée 17 de la paroi 12 et la seconde paroi 13 de la fente 6. L'angle aigu a entre la partie extérieure de la paroi 12 et la partie inclinée est de l'ordre de 20°.The insertion slot 6 preferably has two walls 12, 13 parallel to each other and parallel to the median plane of the slot 6 represented by the line r which is simultaneously a radial plane of the cylinder. The width d of this slot 6 is approximately 4 mm. The insertion slot 6 is wide enough to allow it to slide and push towards the center of the cylinder the folded and reinforced end 7 of the blanket 3, reinforcement consisting of a spring steel strip 14 of a thickness , for example 0.2 mm and 5 mm wide, glued to the folded end of the blanket 3. The opening angle y between the end 7 and the blanket 3 should be only a few degrees ( 5-15 °) when inserting the folded end 7 into the insertion slot 6 (fig. 3). The radial slot 6 forms at its inner part a housing 16 parallel to the axis of the cylinder 2, the cross section of which widens inwards. The housing 16 is limited by an inclined part 17 of the wall 12 and the second wall 13 of the slot 6. The acute angle a between the external part of the wall 12 and the inclined part is of the order of 20 °.

Le logement élargi 16 débouche par exemple sur un trou cylindrique 18 pour pivot de tension, trou coaxial avec le cylindre, et où est logé le pivot de tension 19. Le pivot de tension 19 est doté d'une rainure 21 parallèle à l'axe du cylindre 2 et servant à la fixation de la seconde extrémité renforcée 8 du blanchet 3.The enlarged housing 16 opens for example on a cylindrical hole 18 for tension pivot, hole coaxial with the cylinder, and where the tension pivot 19 is housed. The tension pivot 19 has a groove 21 parallel to the axis of the cylinder 2 and used for fixing the second reinforced end 8 of the blanket 3.

Dans la paroi 17, au début du logement 16, on a inséré une rainure 22 parallèle à l'axe du cylindre qui s'étend sur toute la longueur du cylindre 2 et dont le profil est rectangulaire. Le plan médian 23 de la rainure accuse, par rapport à paroi 12, un angle d'ouverture β variant entre 5° et 45°, mais étant de préférence de 30°. La largeur c de la rainure 22 est choisie de telle sorte qu'il reste encore juste assez de place pour l'extrémité renforcée 7 du blanchet 3. La profondeur g de la rainure de réception 22 est légèrement plus élevée que la largeur de la première extrémité renforcée 7 du blanchet 3. Le processus de fixation de l'extrémité 7 du blanchet est le suivant :In the wall 17, at the start of the housing 16, a groove 22 has been inserted parallel to the axis of the cylinder which extends over the entire length of cylinder 2 and whose profile is rectangular. The median plane 23 of the groove shows, with respect to wall 12, an opening angle β varying between 5 ° and 45 °, but preferably being 30 °. The width c of the groove 22 is chosen so that there is still just enough room for the reinforced end 7 of the blanket 3. The depth g of the receiving groove 22 is slightly greater than the width of the first reinforced end 7 of the blanket 3. The process for fixing the end 7 of the blanket is as follows:

Le blanchet 3 est plié sur sa première extrémité 7, juste derrière la bande d'acier à ressort 14, de manière à se trouver contre le flanc de la fente d'insertion 6 dans lequel se trouve la rainure de réception 22 (fig. 3). Ce faisant, le blanchet 3 repose de telle sorte que son côté extérieur 26 se trouve contre le manteau 1 du cylindre 2. Ensuite, l'extrémité pliée 7, dans cette forme pliée, est insérée, à partir du manteau 1, dans la fente d'insertion 6, à l'aide d'une pièce en tôle mince ou d'une spatule. Il est indiqué de contribuer à une bonne insertion en poussant à plusieurs reprises l'extrémité pliée le long de la fissure d'insertion 6. Etant donné que, lors du pliage, la largeur 1 de l'extrémité pliée 7 a été choisie de manière à être à peine supérieure à la largeur d de la fente d'insertion 6, l'extrémité pliée 7, en glissant dans la fente d'insertion 6, ne peut s'ouvrir que très légèrement. Mais lorsque l'extrémité 7, ou plus exactement sa partie frontale 27 arrive à la hauteur de l'embouchure dans la rainure de réception 22, l'angle d'ouverture y de l'extrémité pliée 7 s'agrandit sous l'effet de la force de rappel du blanchet 3 et la partie frontale 27 glisse dans la rainure de réception 22. Si l'on tire alors, en direction de la circonférence du cylindre, sur le blanchet 3 désormais croché, la première extrémité 7 pénètre dans la rainure longitudinale 22 jusqu'à la hauteur de l'arête de pliage du blanchet 3. On rabat ensuite le blanchet 3 et on introduit sa seconde extrémité 8 dans la rainure 21 du pivot de tension 19, en passant par la fente d'insertion 6. En tournant le pivot de tension 19, le blanchet 3 est tendu, de manière connue.The blanket 3 is folded at its first end 7, just behind the spring steel strip 14, so as to be against the side of the insertion slot 6 in which the receiving groove 22 is located (fig. 3 ). In doing so, the blanket 3 rests so that its outer side 26 is against the mantle 1 of the cylinder 2. Then the folded end 7, in this folded form, is inserted, from the mantle 1, into the slot Insertion 6, using a piece of thin sheet metal or a spatula. It is advisable to contribute to a good insertion by repeatedly pushing the folded end along the insertion crack 6. Since, during folding, the width 1 of the folded end 7 has been chosen so to be barely greater than the width d of the insertion slot 6, the folded end 7, by sliding in the insertion slot 6, can only open very slightly. But when the end 7, or more precisely its front part 27 reaches the height of the mouth in the receiving groove 22, the opening angle y of the folded end 7 increases under the effect of the return force of the blanket 3 and the front part 27 slides in the receiving groove 22. If one then pulls, towards the circumference of the cylinder, on the blanket 3 now hooked, the first end 7 enters the groove longitudinal 22 up to the height of the blanket folding edge 3. The blanket 3 is then folded down and its second end 8 is introduced into the groove 21 of the tension pivot 19, passing through the insertion slot 6. By turning the tension pivot 19, the blanket 3 is stretched, in a known manner.

Pour enlever le blanchet 3, on extrait d'abord la seconde extrémité 8 du pivot de tension 19, de la façon déjà connue, puis de la fente d'insertion 6. On donne ensuite suffisamment de jeu au blanchet 3, sur le manteau 1 du cylindre 2 pour pouvoir pousser le blanchet 3 dans la fissure d'insertion 6, du côté de son extrémité 7 encore crochée. En effectuant un mouvement de poussée, on décroche entièrement de la rainure de réception 22 cette extrémité 7 qui y était encore crochée. Le décrochement effectué, l'extrémité 7 s'ouvre sous l'effet de la force de rappel intérieure du blanchet élastique 3. Ce phénomène est possible parce que la grandeur b du fond du logement 16 est supérieure à la largeur 1 de la partie pliée de la première extrémité 7 du blanchet 3. Ainsi, on peut extraire entièrement de la rainure de réception 22 l'extrémité 7 du blanchet 3.To remove the blanket 3, first extract the second end 8 of the tension pin 19, in the manner already known, then from the insertion slot 6. Then give sufficient clearance to the blanket 3, on the mantle 1 cylinder 2 to be able to push the blanket 3 into the insertion crack 6, on the side of its end 7 still hooked. By carrying out a pushing movement, this end 7 which was still hooked on it is entirely detached from the receiving groove 22. The setback made, the end 7 opens under the effect of the internal return force of the elastic blanket 3. This phenomenon is possible because the magnitude b of the bottom of the housing 16 is greater than the width 1 of the folded part from the first end 7 of the blanket 3. Thus, the end 7 of the blanket 3 can be entirely extracted from the receiving groove 22.

Le blanchet 3 peut bien entendu se reposer sur un habillage 4.The blanket 3 can of course rest on a covering 4.

Le grand avantage de ce processus de fixation des extrémités d'un blanchet consiste en son utilisation sur des cylindres qui doivent avoir une petite fente et des cylindres qui subissent des forces importantes. C'est le cas, par exemple, de cylindres d'impression sur des machines rotatives la bobine pour impression taille-douce.The great advantage of this process of fixing the ends of a blanket consists in its use on cylinders which must have a small slit and cylinders which undergo significant forces. This is the case, for example, of printing cylinders on rotary machines the spool for intaglio printing.

Bien entendu, le dispositif de fixation peut être utilisé aussi pour d'autres applications, par exemp pour la fixation des blanchets sur un cylindre porte-blanchets d'une machine d'impression offse pour autant que l'épaisseur du blanchet ne soit pa trop grande pour pouvoir être plié. En général, un blanchet présentant une épaisseur de 0,4 à 0,7 mr peut en effet être fixé sur le cylindre au moyen du dispositif décrit précédemment.Of course, the fixing device can also be used for other applications, for example for fixing the blankets to a blanket cylinder of an offset printing machine provided that the thickness of the blanket is not too much large to be foldable. In general, a blanket having a thickness of 0.4 to 0.7 mr can in fact be fixed to the cylinder by means of the device described above.

Claims (6)

1. Device for attaching one end of a sheet of flexible, fold-proof material, such as a blanket, on a cylinder of a rotary printing machine, the cylinder being provided with a radial insertion slot extending parallel to the cylinder axis and intended for attaching the folded end of the sheet, characterized by the fact that the radial slot (6) constitutes in its lower portion a cavity (16) of which the cross-section widens out towards the axis of the cylinder (2) and of which the inner bottom has, in the peripheral direction, a width (b) greater than the width (I) of the folded portion (7) of the end of the sheet (3), that one of the walls (12, 13) of the radial slot (6) is provided with a receiving groove (22) for the folded portion (7) of the end of the sheet, said groove being parallel to the axis of the cylinder (2) and forming an acute angle (p) with the portion of said wall (12) extending outwards, and that the maximum width (d) of the external portion of the radial slot (6) which extends beyond the receiving groove (22) is smaller than the width (I) of the folded portion (7) of the end of the sheet (3).
2. Attachment device according to claim 1, characterized by the fact that the folded end (7) of the sheet is provided with a spring-steel blade (14).
3. Attachment device according to one of claims 1 or 2, characterized by the fact that at least one of the walls (12, 13) of the slot (6) is parallel to one radius of the cylinder.
4. Attachment device according to any of claims 1 to 3, characterized by the fact that the acute angle (p) formed between the longitudinal groove (22) and the wall (12) of the radial slot (6) ranges from 5° to 45°, but is preferably equal to 30°.
5. Attachment device according to any of claims 1 to 4, characterized by the fact that the cavity (16) formed in the inner portion of the radial slot (6) is bound on the one hand by an inclined portion (17) of the wall (12) provided with the receiving groove (22), whereby the cavity widens out towards the axis of the cylinder (2), and on the other hand by the inner portion of the second wall (13) of the radial slot (6), which remains in the same plane as its outer portion.
6. Attachment device according to claim 5, characterized by the fact that the acute angle (a) formed by the plane of the external portion of the wall (12) provided with the receiving groove (22) and the plane of the inclined portion (17) is about 20°.
EP83201871A 1983-01-18 1983-12-29 Flexible sheet attaching device for a printing cylinder of a rotary printing machine Expired EP0114446B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83201871T ATE20326T1 (en) 1983-01-18 1983-12-29 DEVICE FOR FIXING FLEXIBLE FILMS ON A CYLINDER OF A ROTARY PRINTING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH258/83 1983-01-18
CH25883 1983-01-18

Publications (3)

Publication Number Publication Date
EP0114446A2 EP0114446A2 (en) 1984-08-01
EP0114446A3 EP0114446A3 (en) 1984-08-22
EP0114446B1 true EP0114446B1 (en) 1986-06-11

Family

ID=4182904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83201871A Expired EP0114446B1 (en) 1983-01-18 1983-12-29 Flexible sheet attaching device for a printing cylinder of a rotary printing machine

Country Status (9)

Country Link
US (1) US4584942A (en)
EP (1) EP0114446B1 (en)
JP (1) JPS59138455A (en)
AT (1) ATE20326T1 (en)
AU (1) AU562876B2 (en)
CA (1) CA1213466A (en)
DD (1) DD212006A1 (en)
DE (1) DE3364104D1 (en)
SU (1) SU1306470A3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738200A (en) * 1985-03-14 1988-04-19 M.A.N. Roland Druckmaschinen Aktiengesellschaft Rubber blanket cylinder for a rotary offset printing machine
US4702166A (en) * 1986-08-28 1987-10-27 Rockwell International Corporation Plate lock-up mechanism for printing presses
JPH09300588A (en) * 1996-05-17 1997-11-25 Mitsubishi Heavy Ind Ltd Mounting of blanket on rotary press and mounting device
US5979272A (en) * 1997-02-10 1999-11-09 Artos Engineering Company Device for gathering, cutting and stripping insulated wire
EP1602482A1 (en) 2004-06-03 2005-12-07 Kba-Giori S.A. Intaglio printing machine with antishock cylinder arrangement
TWI316466B (en) * 2007-03-09 2009-11-01 Ind Tech Res Inst Mold structure and the manufacturing method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2285116A (en) * 1938-10-12 1942-06-02 Interchem Corp Printing plate
US2209127A (en) * 1938-12-19 1940-07-23 United Autographic Register Co Apparatus for attaching printing plates to a cylinder
US2850970A (en) * 1955-04-22 1958-09-09 Levey Fred K H Co Inc Lock-up
DE1213861B (en) * 1956-02-24 1966-04-07 Gerhard Ritzerfeld Rotary multiplier with a printing cylinder for stretching thin, flexible printing form foils
US2986085A (en) * 1959-04-13 1961-05-30 Cottrell Company Printing cylinders for rotary web presses
US3844214A (en) * 1971-11-01 1974-10-29 Dayco Corp Printing blanket bar assembly with edging strip locking means

Also Published As

Publication number Publication date
EP0114446A2 (en) 1984-08-01
DD212006A1 (en) 1984-08-01
US4584942A (en) 1986-04-29
DE3364104D1 (en) 1986-07-17
AU562876B2 (en) 1987-06-18
AU2310384A (en) 1984-07-19
JPH0152186B2 (en) 1989-11-08
CA1213466A (en) 1986-11-04
SU1306470A3 (en) 1987-04-23
ATE20326T1 (en) 1986-06-15
JPS59138455A (en) 1984-08-08
EP0114446A3 (en) 1984-08-22

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