EP0943432A1 - Printing cylinder with a core and a sleeve thereon - Google Patents

Printing cylinder with a core and a sleeve thereon Download PDF

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Publication number
EP0943432A1
EP0943432A1 EP98103118A EP98103118A EP0943432A1 EP 0943432 A1 EP0943432 A1 EP 0943432A1 EP 98103118 A EP98103118 A EP 98103118A EP 98103118 A EP98103118 A EP 98103118A EP 0943432 A1 EP0943432 A1 EP 0943432A1
Authority
EP
European Patent Office
Prior art keywords
printing cylinder
electrically conductive
core
printing
inner layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98103118A
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German (de)
French (fr)
Other versions
EP0943432B1 (en
Inventor
Jeanette Scherf
Knut Dr. Bauer
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.)
Fgm Fritz Gradert Maschinenbau & Co KG GmbH
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP19980103118 priority Critical patent/EP0943432B1/en
Priority to DE59802053T priority patent/DE59802053D1/en
Publication of EP0943432A1 publication Critical patent/EP0943432A1/en
Application granted granted Critical
Publication of EP0943432B1 publication Critical patent/EP0943432B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/193—Transfer cylinders; Offset cylinders

Definitions

  • the invention relates to a printing cylinder with a printing cylinder core and a pressure cylinder jacket pushed onto it, which in the working position the pressure cylinder core sits frictionally and from a seamless inner layer made of fiber-reinforced plastic and an electrical one attached to it conductive material existing seamless outer layer with defined External shape exists.
  • Such a pressure cylinder is known from DE 27 00 118 C2.
  • the pressure cylinder jacket can be expanded by means of a gas cushion which is attached to the Surface of the pressure cylinder core by supplying compressed gas through a Supply line is established.
  • the impression cylinder jacket has a seamless inner layer from one fiber-reinforced plastic and one of a vulcanized on it electrically conductive rubber or a hardened rubber-like Plastic existing seamless outer layer that defines a has cylindrical outer shape.
  • These known printing cylinders have the Disadvantage that they are electrically up and possibly during the printing process discharge what sparks and fires - in most cases solvent-containing atmospheres in the vicinity of printing presses - as well Contamination caused by dust accumulation.
  • the object of the invention is a pressure cylinder of a known type to improve that none during the printing process train electrical charges.
  • electrically conductive threads are arranged such that at least one Make an electrically conductive connection with the metallic Printing cylinder core and at least in one place with the elastic there is electrically conductive material of the impression cylinder jacket.
  • the invention on the one hand an electrostatic charging of the Pressure cylinder and thus the risk of fire prevented and on the other hand one higher mechanical strength, especially of the pressure cylinder jacket and thus also the printing cylinder as a whole, which increases the Print quality and service life leads.
  • the embodiment of a printing cylinder 1 shown in Fig. 1 exists from a metal cylinder 2 and a Printing cylinder jacket 3.
  • the printing cylinder jacket 3 consists of a fiber-reinforced electrically conductive inner layer 4 and one thereon applied elastic outer layer 3a made of electrically conductive rubber or a rubbery plastic.
  • the elastic layer 3a can in Depending on the printing process also as a base for the application of a Serve printing form.
  • the printing cylinder core 2 can not only cylindrical, but also be conical.
  • a Compressed air connection 5 compressed air in the hollow pressure cylinder core 2 which from in Pressure cylinder core 2 provided compressed air outlets 6, whereby the Pressure cylinder jacket 3 expanded and axially by the resulting air cushion completely pushed into its working position or removed can be.
  • the 2 is an embodiment of one - preferably by individual Glass fibers - fiber-reinforced inner layer 4 shown in a plastic 8.
  • the plastic 8 with the glass fibers are electrically conductive threads embedded, especially metal threads - especially copper - which preferably are intersecting and form a network.
  • the threads 7 of the Braid are at least at some crossing points 9 with each other electrically conductively connected.
  • the braid from the threads 7 can also be used as be designed to be relatively rigid. Through the electrically conductive braid electrostatic charges of the printing cylinder 1 avoided during the printing process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

The casing is held by friction on the core (2), and comprises a seamless inner layer of fibre-reinforced plastic, and a seamless outer one of electrically-conductive and elastic material with a precisely-cylindrical external surface. The woven conductive metal is in contact with the core and the elastic material of the casing. The strands of woven metal are electrically connected to each other where they cross. Rubber can be used as the material (3) for electrically-conductive and elastic material of the casing, or alternatively rubber-like plastic.

Description

Die Erfindung betrifft einen Druckzylinder mit einem Druckzylinderkern und einem auf ihn aufgeschobenen Druckzylindermantel, der in Arbeitsstellung auf dem Druckzylinderkern reibschlüssig sitzt und aus einer nahtlosen Innenschicht aus faserverstärktem Kunststoff und einer darauf aufgebrachten aus elektrisch leitfähigem Material bestehenden nahtlosen Außenschicht mit definierter Außenform besteht.The invention relates to a printing cylinder with a printing cylinder core and a pressure cylinder jacket pushed onto it, which in the working position the pressure cylinder core sits frictionally and from a seamless inner layer made of fiber-reinforced plastic and an electrical one attached to it conductive material existing seamless outer layer with defined External shape exists.

Aus der DE 27 00 118 C2 ist ein derartiger Druckzylinder bekannt. Der Druckzylindermantel ist mittels eines Gaspolsters aufweitbar, das auf die Oberfläche des Druckzylinderkernes durch Zufuhr von Druckgas durch eine Zufuhrleitung aufgebaut wird.Such a pressure cylinder is known from DE 27 00 118 C2. Of the The pressure cylinder jacket can be expanded by means of a gas cushion which is attached to the Surface of the pressure cylinder core by supplying compressed gas through a Supply line is established.

Der Druckzylindermantel weist eine nahtlose Innenschicht aus einem faserverstärkten Kunststoff und eine aus einem darauf aufvulkanisierten elektrisch leitfähigen Gummi oder einem ausgehärteten gummiartigen Kunststoff bestehende nahtlose Außenschicht auf, die eine definierte zylindrische Außenform aufweist. Diese bekannten Druckzylinder haben den Nachteil, daß sie sich beim Druckvorgang elektrisch auf- und gegebenenfalls entladen, was zur Funkenbildung und Bränden - in den meist lösungsmittelhaltigen Atmosphären im Umfeld von Druckmaschinen - sowie zu Verschmutzungen durch Staubanreicherungen führt.The impression cylinder jacket has a seamless inner layer from one fiber-reinforced plastic and one of a vulcanized on it electrically conductive rubber or a hardened rubber-like Plastic existing seamless outer layer that defines a has cylindrical outer shape. These known printing cylinders have the Disadvantage that they are electrically up and possibly during the printing process discharge what sparks and fires - in most cases solvent-containing atmospheres in the vicinity of printing presses - as well Contamination caused by dust accumulation.

Aufgabe der Erfindung ist es, einen Druckzylinder bekannter Bauart dahingehend zu verbessern, daß sich während des Druckvorganges keine elektrischen Aufladungen ausbilden. The object of the invention is a pressure cylinder of a known type to improve that none during the printing process train electrical charges.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß in der Innenschicht elektrisch leitfähige Fäden derart angeordnet sind, daß mindestens an einer Stelle eine elektrisch leitende Verbindung mit dem metallischen Druckzylinderkern und mindestens an einer Stelle eine mit dem elastischen elektrisch leitfähigen Material des Druckzylindermantels besteht.This object is achieved in that in the inner layer electrically conductive threads are arranged such that at least one Make an electrically conductive connection with the metallic Printing cylinder core and at least in one place with the elastic there is electrically conductive material of the impression cylinder jacket.

Vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen.Advantageous embodiments of the invention are set out in the subclaims remove.

Durch die Erfindung wird einerseits ein elektrostatisches Aufladen des Druckzylinders und damit die Brandgefahr verhindert und andererseits eine höhere mechanische Festigkeit, insbesondere des Druckzylindermantels und damit auch des Druckzylinders insgesamt erreicht, was zur Erhöhung der Druckqualität und der Standzeit führt.The invention on the one hand an electrostatic charging of the Pressure cylinder and thus the risk of fire prevented and on the other hand one higher mechanical strength, especially of the pressure cylinder jacket and thus also the printing cylinder as a whole, which increases the Print quality and service life leads.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels unter Bezug auf Zeichnungen näher erläutert. Es zeigt:

Fig. 1
einen Druckzylinder in Seitenansicht mit teilweisem Schnitt in schematischer Darstelluung,
Fig. 2
eine nahtlose faserverstärkte Innenschicht für einen Druckzylinder in schematischer Darstellung.
The invention is explained in more detail below using an exemplary embodiment with reference to drawings. It shows:
Fig. 1
a pressure cylinder in side view with partial section in a schematic representation,
Fig. 2
a seamless fiber-reinforced inner layer for a printing cylinder in a schematic representation.

Das in Fig. 1 dargestellte Ausführungsbeispiel eines Druckzylinders 1 besteht aus einem aus einem Metall ausgeführten Druckzylinderkern 2 und einem Druckzylindermantel 3. Der Druckzylindermantel 3 besteht aus einer faserverstärkten elektrisch leitfähigen Innenschicht 4 und einer darauf aufgebrachten elastischen Außenschicht 3a aus elektrisch leitfähigem Gummi oder einem gummiartigen Kunststoff. Die elastische Schicht 3a kann in Abhängigkeit vom Druckverfahren auch als Unterlage für das Aufbringen einer Druckform dienen. The embodiment of a printing cylinder 1 shown in Fig. 1 exists from a metal cylinder 2 and a Printing cylinder jacket 3. The printing cylinder jacket 3 consists of a fiber-reinforced electrically conductive inner layer 4 and one thereon applied elastic outer layer 3a made of electrically conductive rubber or a rubbery plastic. The elastic layer 3a can in Depending on the printing process also as a base for the application of a Serve printing form.

Der Druckzylinderkern 2 kann je nach Bauart der Druckmaschine nicht nur zylindrisch, sondern auch konisch gestaltet sein. Beim Aufschieben des Druckzylindermantels 3 auf den Druckzylinderkern 2 wird über einen Druckluftanschluß 5 Luft in den hohlen Druckzylinderkern 2 gepreßt, die aus im Druckzylinderkern 2 vorgesehenen Druckluftauslassen 6 austritt, wodurch der Druckzylindermantel 3 durch das entstehende Luftpolster aufgeweitet und axial bis in seine Arbeitsstellung vollständig aufgeschoben oder auch entfernt werden kann.Depending on the design of the printing press, the printing cylinder core 2 can not only cylindrical, but also be conical. When postponing the Printing cylinder jacket 3 on the printing cylinder core 2 is a Compressed air connection 5 compressed air in the hollow pressure cylinder core 2, which from in Pressure cylinder core 2 provided compressed air outlets 6, whereby the Pressure cylinder jacket 3 expanded and axially by the resulting air cushion completely pushed into its working position or removed can be.

In Fig. 2 ist ein Ausführungsbeispiel einer - vorzugsweise durch einzelne Glasfasern - faserverstärkten Innenschicht 4 aus einem Kunststoff 8 dargestellt. In den Kunststoff 8 mit den Glasfasern sind elektrisch leitende Fäden eingebettet, insbesondere Metallfäden - speziell aus Kupfer -, die vorzugsweise sich kreuzend angeordnet sind und ein Geflecht bilden. Die Fäden 7 des Geflechtes sind mindestens an einigen Kreuzungsstellen 9 miteinander elektrisch leitfähig verbunden. Das Geflecht aus den Fäden 7 kann auch als relativ biegesteifes Gerüst gestaltet sein. Durch das elektrisch leitende Geflecht bzw. Gerüst werden elektrostatische Aufladungen des Druckzylinders 1 während des Druckvorganges vermieden.2 is an embodiment of one - preferably by individual Glass fibers - fiber-reinforced inner layer 4 shown in a plastic 8. In the plastic 8 with the glass fibers are electrically conductive threads embedded, especially metal threads - especially copper - which preferably are intersecting and form a network. The threads 7 of the Braid are at least at some crossing points 9 with each other electrically conductively connected. The braid from the threads 7 can also be used as be designed to be relatively rigid. Through the electrically conductive braid electrostatic charges of the printing cylinder 1 avoided during the printing process.

Durch den Einsatz von Glasfasern als Einzelfäden (Filaments, Rovings), anstelle von üblicherweise verwendeten Glasfasergewebebändern, wird auch die Festigkeit des Druckzylinders erhöht, die unmittelbar einen Einfluß auf die Qualität des Druckes ausübt und die Standzeit des Druckzylinders verlängert. Bevorzugt wird die Struktur durch kontinuierliches Aufbringen von einzelnen Glasfaserfäden im Filament-Winding-Verfahren (Wickelverfahren) bei der Herstellung der Innenschicht erzeugt.Through the use of glass fibers as single threads (filaments, rovings), instead of commonly used fiberglass tapes, too the strength of the impression cylinder increases, which directly affects the Print quality and extends the life of the printing cylinder. The structure is preferred by continuous application of individual Glass fiber threads in the filament winding process (winding process) at Production of the inner layer generated.

Claims (6)

Druckzylinder (1) mit einem metallischen Druckzylinderkern (2) und einem auf ihn aufgeschobenen Druckzylindermantel (3), der in Arbeitsstellung auf dem Druckzylinderkern (2) reibschlüssig sitzt und aus einer nahtlosen Innenschicht (4) aus einem faserverstärktem Kunststoff und einer darauf aufgebrachten elektrisch leitfähigen aus einem elastischen Material bestehenden nahtlosen Außenschicht (3a) mit definierter Außenform besteht, dadurch gekennzeichnet, daß in der Innenschicht (4) elektrisch leitfähige Fäden derart angeordnet sind, daß mindestens an einer Stelle eine elektrisch leitende Verbindung mit dem Druckzylinderkern (2) und mindestens an einer Stelle eine mit der elektrisch leitfähigen elastischen Schicht (3a) des Druckzylindermantels (3) besteht.Printing cylinder (1) with a metallic printing cylinder core (2) and a pressure cylinder jacket (3) pushed onto it, which is in the working position sits frictionally on the pressure cylinder core (2) and from a seamless Inner layer (4) made of a fiber-reinforced plastic and one on it applied electrically conductive from an elastic material existing seamless outer layer (3a) with a defined outer shape, characterized in that in the inner layer (4) electrically conductive threads are arranged such that an electrically conductive at least at one point Connection to the pressure cylinder core (2) and at least at one point with the electrically conductive elastic layer (3a) of the impression cylinder jacket (3) exists. Druckzylinder nach Anspruch 1, dadurch gekennzeichnet, daß die Fäden sich kreuzend geflechtartig angeordnet sind, und mindestens an einem Teil ihrer Kreuzungsstellen elektrisch leitend miteinander verbunden sind.Printing cylinder according to claim 1, characterized in that the threads are arranged in a cross-like manner, and at least in part their crossing points are electrically connected. Druckzylinder nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Fäden aus einem Metall bestehen.Printing cylinder according to claim 1 or 2, characterized in that the Threads consist of a metal. Druckzylinder nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Faserverstärkung in Form einzelner Fasern im Filament-Winding-Verfahren kontinuierlich in den Kunststoff (8) der Innenschicht (4) eingebracht ist.Printing cylinder according to one of claims 1 to 3, characterized characterized in that the fiber reinforcement in the form of individual fibers in Filament winding process continuously in the plastic (8) of the Inner layer (4) is introduced. Druckzylinder nach Anspruch 4, dadurch gekennzeichnet, daß die einzelnen Fasern Glasfasern sind. Printing cylinder according to claim 4, characterized in that the individual fibers are glass fibers. Druckzylinder nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die elektrisch leitfähige elastische Schicht (3a) aus Gummi oder einem gummiartigen Kunststoff besteht.Printing cylinder according to one of claims 1 to 5, characterized characterized in that the electrically conductive elastic layer (3a) Rubber or a rubber-like plastic is made.
EP19980103118 1998-02-23 1998-02-23 Printing cylinder with a core and a sleeve thereon Expired - Lifetime EP0943432B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19980103118 EP0943432B1 (en) 1998-02-23 1998-02-23 Printing cylinder with a core and a sleeve thereon
DE59802053T DE59802053D1 (en) 1998-02-23 1998-02-23 Printing cylinder with a printing cylinder core and a printing cylinder jacket pushed onto it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980103118 EP0943432B1 (en) 1998-02-23 1998-02-23 Printing cylinder with a core and a sleeve thereon

Publications (2)

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EP0943432A1 true EP0943432A1 (en) 1999-09-22
EP0943432B1 EP0943432B1 (en) 2001-11-07

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DE (1) DE59802053D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10243183C1 (en) * 2002-03-19 2003-08-21 Polywest Kunststofftechnik Sleeve for use on flexoprinting machines comprises an electrically conductive surface which is joined to a contact zone on the sleeve carrier cylinder via an electrically conductive unit accommodated in the sleeve body
EP1346846A2 (en) * 2002-03-19 2003-09-24 POLYWEST KUNSTSTOFFTECHNIK Saueressig & Partner GmbH & Co. KG Sleeve for flexographic printing
US6745692B2 (en) 2002-03-19 2004-06-08 Polywest Kunststofftechnik Saueressig & Partner Gmbh & Co. Kg Sleeve for flexographic printing
WO2013083797A1 (en) 2011-12-09 2013-06-13 Flint Group Germany Gmbh Glass fiber-reinforced sleeve for the printing industry

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235772A (en) * 1961-08-08 1966-02-15 Gurin Emanuel Anti-static printer's blanket in combination with grounded metal roller
GB2051681A (en) * 1979-06-25 1981-01-21 Drg Ltd Printing rolls
US4320714A (en) * 1979-06-12 1982-03-23 Fuji Xerox Co., Ltd. Heat fixing device
EP0149036A2 (en) * 1984-01-17 1985-07-24 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Blanket cylinder for rotative offset printing machine
EP0295319A1 (en) * 1987-06-19 1988-12-21 Saueressig Gmbh & Co. Engraved cylinder composed of a core and a detachable sleeve
DE4230431A1 (en) * 1992-09-11 1994-03-17 Roland Man Druckmasch Offset blanket sleeve
EP0741016A2 (en) * 1995-05-05 1996-11-06 De Pretto-Escher Wyss s.r.l. Impression roller
EP0781654A2 (en) * 1995-12-29 1997-07-02 DeMoore, Howard W. Anti-static, anti-smearing pre-stretched and pressed flat, precision-cut striped flexible coverings for transfer cylinders
DE19634033C1 (en) * 1996-08-23 1998-03-26 Knut Dr Ing Bauer Pressure-resistant cylinder with core and casing

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235772A (en) * 1961-08-08 1966-02-15 Gurin Emanuel Anti-static printer's blanket in combination with grounded metal roller
US4320714A (en) * 1979-06-12 1982-03-23 Fuji Xerox Co., Ltd. Heat fixing device
GB2051681A (en) * 1979-06-25 1981-01-21 Drg Ltd Printing rolls
EP0149036A2 (en) * 1984-01-17 1985-07-24 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Blanket cylinder for rotative offset printing machine
EP0295319A1 (en) * 1987-06-19 1988-12-21 Saueressig Gmbh & Co. Engraved cylinder composed of a core and a detachable sleeve
DE4230431A1 (en) * 1992-09-11 1994-03-17 Roland Man Druckmasch Offset blanket sleeve
EP0741016A2 (en) * 1995-05-05 1996-11-06 De Pretto-Escher Wyss s.r.l. Impression roller
EP0781654A2 (en) * 1995-12-29 1997-07-02 DeMoore, Howard W. Anti-static, anti-smearing pre-stretched and pressed flat, precision-cut striped flexible coverings for transfer cylinders
DE19634033C1 (en) * 1996-08-23 1998-03-26 Knut Dr Ing Bauer Pressure-resistant cylinder with core and casing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10243183C1 (en) * 2002-03-19 2003-08-21 Polywest Kunststofftechnik Sleeve for use on flexoprinting machines comprises an electrically conductive surface which is joined to a contact zone on the sleeve carrier cylinder via an electrically conductive unit accommodated in the sleeve body
EP1346846A2 (en) * 2002-03-19 2003-09-24 POLYWEST KUNSTSTOFFTECHNIK Saueressig & Partner GmbH & Co. KG Sleeve for flexographic printing
US6745692B2 (en) 2002-03-19 2004-06-08 Polywest Kunststofftechnik Saueressig & Partner Gmbh & Co. Kg Sleeve for flexographic printing
EP1346846A3 (en) * 2002-03-19 2004-09-08 POLYWEST KUNSTSTOFFTECHNIK Saueressig & Partner GmbH & Co. KG Sleeve for flexographic printing
WO2013083797A1 (en) 2011-12-09 2013-06-13 Flint Group Germany Gmbh Glass fiber-reinforced sleeve for the printing industry

Also Published As

Publication number Publication date
EP0943432B1 (en) 2001-11-07
DE59802053D1 (en) 2001-12-13

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