EP0943432B1 - 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
EP0943432B1
EP0943432B1 EP19980103118 EP98103118A EP0943432B1 EP 0943432 B1 EP0943432 B1 EP 0943432B1 EP 19980103118 EP19980103118 EP 19980103118 EP 98103118 A EP98103118 A EP 98103118A EP 0943432 B1 EP0943432 B1 EP 0943432B1
Authority
EP
European Patent Office
Prior art keywords
printing cylinder
electrically conductive
core
printing
threads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19980103118
Other languages
German (de)
French (fr)
Other versions
EP0943432A1 (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 GMBH & CO. KG
Original Assignee
Fgm Fritz Gradert Maschinenbau & Co KG GmbH
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 Fgm Fritz Gradert Maschinenbau & Co KG GmbH filed Critical Fgm Fritz Gradert Maschinenbau & Co KG GmbH
Priority to DE59802053T priority Critical patent/DE59802053D1/en
Priority to EP19980103118 priority patent/EP0943432B1/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 Compression 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.

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. 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 Druckluftauslässen 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 Compression 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)

  1. Printing cylinder (1) with a metal printing cylinder core (2) and a printing cylinder jacket (3) slipped thereon, which is placed with frictional fit on the printing cylinder core (2) in the operating position and consists of a seamless inner layer (4) consisting of a fibre reinforced plastics material and an electrically conductive seamless outer layer (3a), with a defined external shape and consisting of an elastic material, applied thereto, characterised in that electrically conductive threads are arranged in the inner layer (4) in such a way that at least at one point, there is an electrically conductive connection to the printing cylinder core (2) and at least at one point there is an electrically conductive connection to the electrically conductive elastic layer (3a) of the printing cylinder jacket (3).
  2. Printing cylinder according to claim 1, characterised in that the threads are arranged to intersect in the manner of braiding and are connected to one another in an electrically conductive manner, at least at some of their points of intersection.
  3. Printing cylinder according to claim 1 or 2, characterised in that the threads consist of a metal.
  4. Printing cylinder according to any one of claims 1 to 3, characterised in that the fibre reinforcement in the form of individual fibres in the filament-winding process is inserted continuously into the plastics material (8) of the inner layer (4).
  5. Printing cylinder according to claim 4, characterised in that the individual fibres are glass-fibres.
  6. Printing cylinder according to any one of claims 1 to 5, characterised in that the electrically conductive elastic layer (3a) consists of rubber or a rubber-like plastics material.
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
DE59802053T DE59802053D1 (en) 1998-02-23 1998-02-23 Printing cylinder with a printing cylinder core and a printing cylinder jacket pushed onto it
EP19980103118 EP0943432B1 (en) 1998-02-23 1998-02-23 Printing cylinder with a core and a sleeve thereon

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)

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

Family

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Family Applications (1)

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

Country Status (2)

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EP (1) EP0943432B1 (en)
DE (1) DE59802053D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10261955A1 (en) * 2002-03-19 2003-11-13 Polywest Kunststofftechnik Sleeve for flexographic printing
DE20204412U1 (en) 2002-03-19 2002-05-29 Polywest Kunststofftechnik Sleeve for flexographic printing
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
US20150135978A1 (en) 2011-12-09 2015-05-21 Flint Group Germany Gmbh Glass fiber-reinforced sleeve for the printing industry

Family Cites Families (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
JPS55164858A (en) * 1979-06-12 1980-12-22 Fuji Xerox Co Ltd Heat fixing device
GB2051681B (en) * 1979-06-25 1983-03-02 Drg Ltd Printing rolls
DE3401350C2 (en) * 1984-01-17 1986-01-23 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Cylinder lift for a blanket cylinder of a rotary offset printing machine
ES2022212B3 (en) * 1987-06-19 1991-12-01 Saueressig Gmbh + Co ENGRAVING HOLLOW CYLINDER CONSISTING OF A NUCLEUS AND A RELEASABLE SLEEVE ATTACHED WITH SUCH NUCLEUS
DE4230431C2 (en) * 1992-09-11 1996-09-26 Roland Man Druckmasch Offset blanket sleeve
EP0741016A3 (en) * 1995-05-05 1997-09-24 Pretto De Escher Wyss Srl Impression roller
US5907998A (en) * 1995-12-29 1999-06-01 Howard W. Demoore 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

Also Published As

Publication number Publication date
DE59802053D1 (en) 2001-12-13
EP0943432A1 (en) 1999-09-22

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