EP2660052A1 - System und Verfahren zur Befestigung eines bedruckbaren Bahnsubstrats auf einem zentralen Druckzylinder einer Druckmaschine, und Druckmaschine mit diesem System - Google Patents

System und Verfahren zur Befestigung eines bedruckbaren Bahnsubstrats auf einem zentralen Druckzylinder einer Druckmaschine, und Druckmaschine mit diesem System Download PDF

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Publication number
EP2660052A1
EP2660052A1 EP12003023.4A EP12003023A EP2660052A1 EP 2660052 A1 EP2660052 A1 EP 2660052A1 EP 12003023 A EP12003023 A EP 12003023A EP 2660052 A1 EP2660052 A1 EP 2660052A1
Authority
EP
European Patent Office
Prior art keywords
impression cylinder
central impression
web
printable substrate
electrostatic charge
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.)
Withdrawn
Application number
EP12003023.4A
Other languages
English (en)
French (fr)
Inventor
Michiel Van Der Meulen
Adelbert Lucas Schoonman
Lluis Puigdemont
Suesa Luis Antonio Ruiz
Vila Jordi Puig
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.)
Neopack SL
Original Assignee
Neopack SL
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 Neopack SL filed Critical Neopack SL
Priority to EP12003023.4A priority Critical patent/EP2660052A1/de
Publication of EP2660052A1 publication Critical patent/EP2660052A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing

Definitions

  • the present invention generally relates, in a first aspect, to a system for fixation a web printable substrate on a central impression cylinder (CI cylinder) of a printing machine, and more particularly to a system which comprises electrostatic charging means for performing said fixation.
  • CI cylinder central impression cylinder
  • a second aspect of the invention comprises a printing machine with a central impression cylinder comprising the system of the first aspect.
  • a third aspect of the invention relates to a method for fixation a web printable substrate on a central impression cylinder of a printing machine, by applying a controlled electrostatic charge on a surface of the web printable substrate and/or of the central impression cylinder.
  • EP 1034078 discusses an electrostatic arrangement for rotogravure and flexographic printing that uses HV electrode fitted to outside of impression cylinder or printing form cylinder at one end intended for polarising printing ink droplets to provide improved printing quality.
  • EP 115611 discloses an electrostatically-assisted, rotogravure printer using HV inductor at end of pressure roller.
  • electrostatic charge obtained from an electrostatic field is used to increasing the flow and incorporation of the ink into the material to be printed.
  • the present invention provides provides a different application of electrostatic charge in a printing press with a CI cylinder which will be explained below.
  • the system provides a solution for the printing of thin and/or elastic web shaped film materials on a central impression cylinder type press in order to avoid web lifting that can occur due to the fact that:
  • the present invention provides, in a first aspect, a system for fixation a web printable substrate on a central impression cylinder of a printing machine, said printing machine comprising said central impression cylinder on which said web printable substrate is supported and a plurality of printing stations arranged around the central impression cylinder and comprising respective printing elements.
  • the system of the invention comprises, in a characteristic manner, at least one electrostatic charge unit for applying a controlled electrostatic charge on a surface which whether belongs to the web printable substrate or forms part of a surface of the central impression cylinder supporting said web printable substrate.
  • a second aspect of the invention comprises a printing machine with a central impression cylinder, in particular an offset printing machine with a central impression cylinder as the one disclosed in the patent application EP 10014329 comprising the referred system.
  • a third aspect of the invention relates to a method for fixation a web printable substrate on a central impression cylinder of an offset printing machine, where said printing machine comprises said central impression cylinder on which said web printable substrate is supported and a plurality of printing stations arranged around the central impression cylinder and comprising respective printing elements.
  • the method of the invention comprises performing said fixation by applying a controlled electrostatic charge on a non-conducting surface (using well known means) which whether belongs to the web printable substrate or forms part of a surface of the central impression cylinder supporting said web printable substrate.
  • the system of the invention is applied to a printing machine which comprises a central impression cylinder 1 on which a web printable substrate B is supported and a plurality of offset printing stations P1-P4 arranged around the central impression cylinder 1 and comprising respective printing elements, including at least blankets, although for some embodiments, not illustrated, it also includes one or more flexographic plates and/or a continuous sleeve for offset printing or flexographic printing.
  • the system comprises, for the illustrated embodiment, one electrostatic charge unit C placed at an entry zone E of the central impression cylinder 1, for the web printable substrate B, and configured for transferring a controlled electrostatic charge to a region of the web printable substrate B at said entry zone E before it contacts the external surface of central impression cylinder 1.
  • the electrostatic charge unit (C) comprises or is associated to at least one electrostatic charge generator (not illustrated) placed near the web printing substrate (B) wherein said charge generator is configured for generating up to 50 KV.
  • the electrostatic charge unit C applies a controlled electrostatic charge on a non-conducting surface of the central impression cylinder 1 supporting said web printable substrate B, alternatively or in addition to the electrostatic charge application on the web printable substrate B.
  • the system of the invention further comprises an electrostatically discharge unit D for discharging said non-conducting surface once charged, which, for the illustrated embodiment, is placed at an exit zone S of the central impression cylinder 1, for the web printable substrate B, and configured for discharging an already charged region of the web printable substrate B at said exit zone S after it stops contacting the external surface of the central impression cylinder 1.
  • an electrostatically discharge unit D for discharging said non-conducting surface once charged, which, for the illustrated embodiment, is placed at an exit zone S of the central impression cylinder 1, for the web printable substrate B, and configured for discharging an already charged region of the web printable substrate B at said exit zone S after it stops contacting the external surface of the central impression cylinder 1.
  • the system comprises several electrostatic charge units configured for transferring electrostatic charges to the web printable substrate B on more than one zone along its development over the external surface of the central impression cylinder 1 which supports it.
  • the central impression cylinder 1 is coated with a material (not shown) which electrically isolates it from the web printable substrate B making difficult the electrical surface charge dissipation and then avoiding losses of electrical charge.
  • both the central impression cylinder 1 and the web printable substrate B are electrically isolating, the electrostatic charge unit C being configured for applying electrostatic charges on both, the central impression cylinder 1 and the web printable substrate B.
  • the system of the invention comprises control means for controlling the operation the electrostatic charge unit C and of the electrostatic discharge unit D, which may be external or internal to the units C, D.
  • the electrostatic charging and/or discharging obtained by units C and D of the system of the invention provides a tightening of the web printing substrate B against the external surface of the central impression cylinder 1 is also achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Rotary Presses (AREA)
EP12003023.4A 2012-04-30 2012-04-30 System und Verfahren zur Befestigung eines bedruckbaren Bahnsubstrats auf einem zentralen Druckzylinder einer Druckmaschine, und Druckmaschine mit diesem System Withdrawn EP2660052A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12003023.4A EP2660052A1 (de) 2012-04-30 2012-04-30 System und Verfahren zur Befestigung eines bedruckbaren Bahnsubstrats auf einem zentralen Druckzylinder einer Druckmaschine, und Druckmaschine mit diesem System

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12003023.4A EP2660052A1 (de) 2012-04-30 2012-04-30 System und Verfahren zur Befestigung eines bedruckbaren Bahnsubstrats auf einem zentralen Druckzylinder einer Druckmaschine, und Druckmaschine mit diesem System

Publications (1)

Publication Number Publication Date
EP2660052A1 true EP2660052A1 (de) 2013-11-06

Family

ID=46061991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12003023.4A Withdrawn EP2660052A1 (de) 2012-04-30 2012-04-30 System und Verfahren zur Befestigung eines bedruckbaren Bahnsubstrats auf einem zentralen Druckzylinder einer Druckmaschine, und Druckmaschine mit diesem System

Country Status (1)

Country Link
EP (1) EP2660052A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117400625A (zh) * 2023-09-13 2024-01-16 浙江盛龙装饰材料有限公司 一种装饰纸的静电修正系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57157785A (en) * 1981-03-26 1982-09-29 Kyodo Printing Co Ltd Method and device for printing on multi-layer web
EP0115611A1 (de) 1982-12-27 1984-08-15 Walter Spengler Druckwerk mit elektrostatischer Druckhilfe
DE3935013A1 (de) * 1989-10-20 1991-04-25 Klaus Kalwar Verfahren und vorrichtung zur koronabehandlung von unbeschichteten oder beschichteten materialien
EP1001432A1 (de) 1998-11-10 2000-05-17 Lucent Technologies Inc. Prüfungsverfahren eines dynamischen Speichers
EP1318014A1 (de) * 2001-12-10 2003-06-11 Eltex-Elektrostatik GmbH Vorrichtung zum Fixieren einer Materialbahn

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57157785A (en) * 1981-03-26 1982-09-29 Kyodo Printing Co Ltd Method and device for printing on multi-layer web
EP0115611A1 (de) 1982-12-27 1984-08-15 Walter Spengler Druckwerk mit elektrostatischer Druckhilfe
DE3935013A1 (de) * 1989-10-20 1991-04-25 Klaus Kalwar Verfahren und vorrichtung zur koronabehandlung von unbeschichteten oder beschichteten materialien
EP1001432A1 (de) 1998-11-10 2000-05-17 Lucent Technologies Inc. Prüfungsverfahren eines dynamischen Speichers
EP1318014A1 (de) * 2001-12-10 2003-06-11 Eltex-Elektrostatik GmbH Vorrichtung zum Fixieren einer Materialbahn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117400625A (zh) * 2023-09-13 2024-01-16 浙江盛龙装饰材料有限公司 一种装饰纸的静电修正系统

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