WO2020031084A1 - Manchon pour supporter une plaque d'impression - Google Patents

Manchon pour supporter une plaque d'impression Download PDF

Info

Publication number
WO2020031084A1
WO2020031084A1 PCT/IB2019/056685 IB2019056685W WO2020031084A1 WO 2020031084 A1 WO2020031084 A1 WO 2020031084A1 IB 2019056685 W IB2019056685 W IB 2019056685W WO 2020031084 A1 WO2020031084 A1 WO 2020031084A1
Authority
WO
WIPO (PCT)
Prior art keywords
jacket
sleeve
inner jacket
connecting element
sleeve according
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.)
Ceased
Application number
PCT/IB2019/056685
Other languages
English (en)
Inventor
Amerigo Manzini
Marco Gaddi
Carmine CIOFFI
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.)
Omet SRL
Original Assignee
Omet SRL
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 Omet SRL filed Critical Omet SRL
Priority to EP19765562.4A priority Critical patent/EP3833543A1/fr
Publication of WO2020031084A1 publication Critical patent/WO2020031084A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/14—Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members
    • 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
    • B41F27/06—Devices for attaching printing elements or formes to supports for attaching printing elements to forme cylinders
    • 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
    • B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising

Definitions

  • the present invention is generally in the field of printing machines; in particular, the invention refers to a printing plate support sleeve.
  • Support sleeves for printing plates in the form of composite cylindrical elements that are fitted, by means of a pneumatic thrust, on rotating mandrels of a printing machine (as will be better appreciated in the following description) are known.
  • the plate is a matrix that is mounted on a radially outer jacket of the sleeve (as shown in Figures 1A and 1B); such sleeve comprises a radially inner jacket that is forced onto the mandrel of the printing machine.
  • the two jackets are connected by several layers of materials having different elasticity and flexibility with respect to the jackets themselves.
  • a traditional mandrel comprises a number of radial holes, from which pressurized air is expelled during operations of assembly and disassembly of the sleeve, creating a pneumatic bearing that causes the radial expansion of the inner jacket of the sleeve and allows the operator to bring the sleeve axially and angularly into the printing position (as shown in Figures 2A and 2B).
  • the expansion of the inner jacket of the sleeve is permitted by its flexibility, as well as by the elasticity and compressibility of the damping and filling layers that wrap the inner jacket. Once the air is no longer expelled from the mandrel shaft, the inner diameter of the sleeve returns to its original size, tightening the sleeve on the shaft.
  • the outer jacket is not rigidly bonded to the inner jacket. Indeed, the intervention of external forces may cause unwanted deformation of the intermediate layers, causing angular and radial displacements between the two jackets, depending on the reaction force of the elastic damping part and the stresses on the sleeve.
  • Figures 3A and 3B schematically show a sleeve according to the prior art during the printing stage; such sleeve carries a plate rotating between an inking roller (bottom left in the figures) and a contrast roller for printing (bottom right), in a manner known per se.
  • Figures 3A and 3B show, respectively, a condition wherein the inner and outer jackets undergo an angular misalignment, and a condition wherein the two jackets undergo a radial misalignment (but it is also possible for the two conditions to occur simultaneously).
  • These adapters in turn consist of a radially innermost jacket and a radially outermost jacket, radially expandable by means of a pressurizable fluid, which is blown into the interface between said jackets.
  • a pressurizable fluid which is blown into the interface between said jackets.
  • the fluid inside the adapter must be kept under pressure to preserve the radial expansion of the outer jacket of the adapter, and the consequent engagement of the sleeve.
  • valves and seals must be provided in the adapter, which make its construction complex.
  • One purpose of the present invention is to eliminate the angular and radial misalignments between the outer jacket and the inner jacket of the sleeve, while maintaining the pneumatic mounting of the sleeve on the mandrel, by means of radial expansion of the inner jacket.
  • the inner and outer jackets of the sleeve are rigidly joined together by means of radial connecting elements, which are preferably placed at the axial ends of the sleeve and are firmly joined to the two jackets, so that the transmission of the rotation from the inner jacket to the outer jacket is conveyed by the rigid connecting element, and not by the elastic layers that may be placed between these jackets.
  • the sleeve is monolithic, so that the inner and outer jackets and the radial connecting elements are made in one piece.
  • the radial thickness of the inner jacket is reduced in the segments near the connecting elements.
  • the radial expansion of the inner jacket would be hindered.
  • the inner jacket is free to expand radially under the effect of pneumatic pressure, so that it may be fitted on, and removed from, the rotating mandrel of the printing machine, according to methods known to the person skilled in the art.
  • FIG. 1A and 1B are respectively a schematic frontal view and a longitudinal sectional view of a sleeve on which a printing plate is mounted, according to the prior art
  • FIGS 2 A and 2B are schematic views of two stages of the process of mounting a sleeve on the mandrel shaft of a printing machine, according to the known technique, wherein is visible the stage of radial expansion of the inner jacket under the pneumatic thrust generated by the mandrel, and this inner jacket’s subsequent return to its original diameter, with the resulting locking on the mandrel;
  • FIGS. 3A and 3B are schematic views of two undesirable conditions that may be found in a sleeve according to the prior art and illustrate respectively a condition of angular misalignment and a condition of radial misalignment between the inner and outer jackets;
  • FIGS. 4 A and 4B are respectively a schematic frontal view and a longitudinal sectional view of a sleeve on which a printing plate is mounted, according to an
  • FIG. 5 is a schematic longitudinal sectional view of a sleeve on which is mounted a printing plate, according to an embodiment of the present invention wherein the sleeve is made monolithic, i.e. having the inner and outer jackets and connecting elements made in one piece.
  • a sleeve 1 adapted to support a printing plate 10, comprises an inner jacket 12, annular or cylindrical in shape and extending axially between a first end portion l2a and a second end portion l2b.
  • the inner jacket 12 is adapted to be mounted on a mandrel shaft 1 1 of a printing machine and is at least partly elastically deformable in a radial direction under the action of a pneumatic thrust exerted by such mandrel shaft 11.
  • the sleeve 1 further comprises an outer jacket 14 of an annular shape, coaxial with respect to the inner jacket 12 and radially outermost with respect to the latter.
  • the sleeve 1 comprises at least one connecting element 16, extending radially between the inner jacket 12 and the outer jacket 14 and configured in such a way as to rigidly connect said inner and outer jackets 12, 14.
  • the connecting element 16 is located near an end portion l2a, 12b of the inner jacket 12.
  • said inner and outer jackets 12, 14 and in said at least one connecting element 16 there are no through holes adapted to allow the introduction of a fluid to the interface between said jackets 12, 14 (to cause the radial expansion of the radially outer jacket 14 with respect to the radially inner jacket 12) and/or to accommodate pressurizing means, adapted to pressurize and/or to maintain under pressure a fluid between these jackets 12, 14.
  • the sleeve 1 is monolithic, i.e. the inner and outer jackets 12, 14 and connecting elements 16 are made in one piece (as shown in figure 5). In other words, there is a mechanical and structural continuity between the inner and outer jackets 12, 14 and the connecting elements 16.
  • the outer jacket 14 rotates integrally with the inner jacket 12, and no undesired misalignments are possible.
  • connecting elements 16 located near the opposite end portions l2a, l2b of the inner jacket 12 (as shown by way of example in Figure 4B).
  • the connecting element 16 is configured as rays of elements spaced circumferentially.
  • the connecting element 16 is configured as a ring extending circumferentially for at least part of the cross-section of the inner jacket 12 (as illustrated by way of example in Figure 4A).
  • the terms and expressions indicating positions and orientations such as“longitudinal”,“radial” or“circumferential”, refer to the longitudinal axis x of the sleeve 1.
  • the inner diameter of the inner jacket 12 at the connecting element 16 is greater than the diameter of the sections of such inner jacket 12 where there is no connecting element 16.
  • the inner diameter of the inner jacket 12 at the connecting element 16 is configured to prevent contact between the inner jacket 12 and the mandrel 1 1. In this way, the mandrel 11 may be inserted into, or removed from, the sleeve 1 without resistance, and without the need to deform the inner jacket 12 (the deformation of which would be hindered by the connecting element 16).
  • the segments of the inner jacket 12 wherein the connecting elements 16 are not present at the segments of the inner jacket 12 wherein the connecting elements 16 are not present (conveniently, the axially central segment of the inner jacket 12, i.e.
  • this inner jacket 12 will be free to expand radially under the thrust of air jets coming out of the mandrel 1 1 , so as to accommodate the latter and, once the pneumatic thrust has ceased, return elastically to the original diameter, remaining locked on the mandrel 1 1. It follows that, when the connecting element 16 is placed near an end portion l2a, l2b, the inner diameter of the inner jacket 12 near that end portion l2a, l2b would be greater than the diameter of the other sections of the inner jacket 12, as for example illustrated in the embodiment in Figure 4B.
  • the sleeve comprises an intermediate jacket 18, in a radially interposed position between the inner jacket 12 and the outer jacket 14.
  • a layer of damping material 20 made for example of rubber or other material having greater elasticity and flexibility than those of the inner and outer jackets 12, 14.
  • a filling layer 22 which has different elasticity and flexibility with respect to the layer of damping material 20.
  • a printing plate support sleeve according to the invention has been described. It is understood that each embodiment may be combined with any other embodiment. The invention, moreover, is not limited to the described embodiments, but may be varied within the scope defined by the accompanying claims.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Pens And Brushes (AREA)

Abstract

Un manchon (1) pour une plaque d'impression (10) comprend une chemise interne (12) de forme annulaire, une chemise externe (14) coaxiale par rapport à cette chemise interne (12), et au moins un élément de liaison (16), s'étendant radialement entre les deux chemises (12, 14) et configuré pour les relier fixement.
PCT/IB2019/056685 2018-08-06 2019-08-06 Manchon pour supporter une plaque d'impression Ceased WO2020031084A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19765562.4A EP3833543A1 (fr) 2018-08-06 2019-08-06 Manchon pour supporter une plaque d'impression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000007881 2018-08-06
IT102018000007881A IT201800007881A1 (it) 2018-08-06 2018-08-06 Manicotto porta-cliché di stampa.

Publications (1)

Publication Number Publication Date
WO2020031084A1 true WO2020031084A1 (fr) 2020-02-13

Family

ID=63896588

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/056685 Ceased WO2020031084A1 (fr) 2018-08-06 2019-08-06 Manchon pour supporter une plaque d'impression

Country Status (3)

Country Link
EP (1) EP3833543A1 (fr)
IT (1) IT201800007881A1 (fr)
WO (1) WO2020031084A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5819657A (en) * 1996-03-11 1998-10-13 Ermino Rossini, Spa Air carrier spacer sleeve for a printing cylinder
DE20012929U1 (de) * 2000-07-25 2000-11-23 Polywest Kunststofftechnik Saueressig & Partner GmbH & Co. KG, 48683 Ahaus Adapterhülse, insbesondere für Druckmaschinen
DE20019625U1 (de) * 2000-11-17 2001-04-05 Polywest Kunststofftechnik Saueressig & Partner GmbH & Co. KG, 48683 Ahaus Trägerhülse für Druckmaschinen
EP1327522A1 (fr) * 2002-01-15 2003-07-16 Xymid, LLC Manchon réutilisable pour une machine d'impression
US20040139872A1 (en) * 2003-01-17 2004-07-22 Renzo Melotti Device for adjusting extractable jackets in flexographic machines
EP2202073A1 (fr) * 2008-12-16 2010-06-30 ROSSINI S.p.A. Manchon adaptateur haute rigidité pour cylindres d'impression

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10241800B4 (de) * 2002-09-06 2014-04-30 Polywest Kunststofftechnik Saueressig & Partner Gmbh & Co. Kg Hülse mit mehrschichtigem Aufbau für Druckmaschinen und Verfahren zu ihrer Herstellung
ES2712654B2 (es) * 2017-11-13 2019-10-16 Rossini Spain Printing Rollers SAU Camisa adaptadora para máquinas de impresión flexográfica

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5819657A (en) * 1996-03-11 1998-10-13 Ermino Rossini, Spa Air carrier spacer sleeve for a printing cylinder
DE20012929U1 (de) * 2000-07-25 2000-11-23 Polywest Kunststofftechnik Saueressig & Partner GmbH & Co. KG, 48683 Ahaus Adapterhülse, insbesondere für Druckmaschinen
DE20019625U1 (de) * 2000-11-17 2001-04-05 Polywest Kunststofftechnik Saueressig & Partner GmbH & Co. KG, 48683 Ahaus Trägerhülse für Druckmaschinen
EP1327522A1 (fr) * 2002-01-15 2003-07-16 Xymid, LLC Manchon réutilisable pour une machine d'impression
US20040139872A1 (en) * 2003-01-17 2004-07-22 Renzo Melotti Device for adjusting extractable jackets in flexographic machines
EP2202073A1 (fr) * 2008-12-16 2010-06-30 ROSSINI S.p.A. Manchon adaptateur haute rigidité pour cylindres d'impression

Also Published As

Publication number Publication date
EP3833543A1 (fr) 2021-06-16
IT201800007881A1 (it) 2020-02-06

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