EP4059716A1 - Guide-feuilles - Google Patents

Guide-feuilles Download PDF

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Publication number
EP4059716A1
EP4059716A1 EP21163444.9A EP21163444A EP4059716A1 EP 4059716 A1 EP4059716 A1 EP 4059716A1 EP 21163444 A EP21163444 A EP 21163444A EP 4059716 A1 EP4059716 A1 EP 4059716A1
Authority
EP
European Patent Office
Prior art keywords
sheet
housing
overpressure chamber
cylinder
inspection system
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
EP21163444.9A
Other languages
German (de)
English (en)
Other versions
EP4059716B1 (fr
Inventor
Frank Soltwedel
Michael Gieser
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to EP21163444.9A priority Critical patent/EP4059716B1/fr
Priority to CN202111632064.XA priority patent/CN115157854A/zh
Publication of EP4059716A1 publication Critical patent/EP4059716A1/fr
Application granted granted Critical
Publication of EP4059716B1 publication Critical patent/EP4059716B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/102—Combinations of transfer drums and grippers with pneumatic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing

Definitions

  • the present invention relates to a device for guiding a sheet during inspection in a printing press.
  • the object of the invention is to provide another device of this type.
  • the object is achieved by a device for guiding a sheet during inspection in a printing press, characterized in that side walls of a housing that has an overpressure chamber overlap side surfaces of a cylinder that transports the sheet.
  • the invention has the advantage that little air can escape from the housing between the side walls and side surfaces. Seals are formed by the overlaps.
  • FIG 1 an impression cylinder 1 is shown which, together with a blanket cylinder 2, forms a printing nip in which offset printing takes place.
  • a sheet 3 is transported on the impression cylinder 1 and is held in place by its gripper bar 4 .
  • a pneumatic sheet guide is arranged after the printing nip, which presses the sheet 3 onto the impression cylinder 1 and prevents fluttering.
  • the pneumatic sheet guide has a housing 5 which is open towards the impression cylinder 1 and thus forms a kind of hood.
  • a sheet inspection system is arranged outside of the housing 5 and detects optical properties of the printed image on the sheet 3 .
  • the sheet inspection system includes a camera 6 and a light 7 directed at the sheet 3 .
  • the pneumatic sheet guide ensures that the sheet 3 lies flat on the impression cylinder 1 when the sheet 3 is measured by the sheet inspection system.
  • the line of sight of the camera 6 is in the sheet transport direction after the housing 5.
  • an overpressure chamber 8 which has no nozzles or blown air openings towards the impression cylinder 1, but only a format-wide, single opening.
  • the overpressure prevailing in the overpressure chamber 8 is represented symbolically by double arrows and acts as an air cushion through the opening mentioned on the sheet 3.
  • figure 2 1 shows a modification in which the housing 5 is enlarged in such a way that the sheet inspection system can be arranged in the hyperbaric chamber 8. Otherwise the system with an integrated arrangement of the camera 6 and lighting 7 does not differ from the system with an external arrangement described above.
  • the housing 5 includes a collecting line 9 which is connected to a blower 10 which generates the overpressure in the overpressure chamber 8 .
  • sliding walls 14, 15 are arranged, which correspond to the format width of the sheet 3 at a greater distance ( figure 3 ) and smaller distance ( figure 4 ) can be adjusted from each other.
  • the sliding walls 14, 15 limit the lateral extent of the overpressure chamber 8 lying between them, which is therefore variable in format.
  • the sliding walls 14, 15 can be adjusted steplessly.
  • the outer supply channels 11, 12 are each connected to the collecting line 9 via a shut-off valve 16 in the form of a flap. No such shut-off valve is assigned to the inner supply channel 13 .
  • figure 3 shows a mode in which the outer supply channels 11, 12 between the sliding walls 14, 15 open into the overpressure chamber 8 and the shut-off valves 16 are open.
  • figure 4 shows another mode in which the sliding walls 14, 15 are adjusted so far towards each other that the outer supply channels 11, 12 open out outside the overpressure chamber 8. In this mode, the shut-off valves 16 are closed and the overpressure chamber 8 is only supplied with compressed air via the inner supply channel 13 .
  • the shut-off valves 16 avoid wasting air and reduce air consumption.
  • the housing 5 has side walls 17, 18 which overlap a side surface 19, 20 of the impression cylinder 1, respectively. In the region of the overlaps 21 there is only a narrow movement gap between the side wall 17, 18 and the side surface 19 or 20, through which only very little secondary air 22 can escape from the housing 5.
  • the overlaps 21 form seals, through which the efficiency of the pneumatic sheet guiding is noticeably increased.
  • the secondary air 22 comes from the overpressure chamber 8, which is sealed off laterally from the environment by the sliding walls 14, 15 in a first stage and by the overlaps 21 in a second stage.
  • an impression cylinder of a varnishing unit or a sheet transport cylinder between two printing units can also be used as an inspection cylinder, which transports the sheet 3 during its inspection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP21163444.9A 2021-03-18 2021-03-18 Machine d'impression avec système d'inspection de feuilles et guide-feuilles Active EP4059716B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21163444.9A EP4059716B1 (fr) 2021-03-18 2021-03-18 Machine d'impression avec système d'inspection de feuilles et guide-feuilles
CN202111632064.XA CN115157854A (zh) 2021-03-18 2021-12-29 页张引导装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21163444.9A EP4059716B1 (fr) 2021-03-18 2021-03-18 Machine d'impression avec système d'inspection de feuilles et guide-feuilles

Publications (2)

Publication Number Publication Date
EP4059716A1 true EP4059716A1 (fr) 2022-09-21
EP4059716B1 EP4059716B1 (fr) 2024-07-10

Family

ID=75108221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21163444.9A Active EP4059716B1 (fr) 2021-03-18 2021-03-18 Machine d'impression avec système d'inspection de feuilles et guide-feuilles

Country Status (2)

Country Link
EP (1) EP4059716B1 (fr)
CN (1) CN115157854A (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19546046A1 (de) * 1995-12-09 1997-06-12 Heidelberger Druckmasch Ag Bogenführsystem für eine Druckmaschine
DE19701230C1 (de) * 1997-01-16 1998-02-19 Roland Man Druckmasch Pneumatische Bogenleiteinrichtung in einer Druckmaschine
DE202006011273U1 (de) 2006-07-21 2006-10-05 Man Roland Druckmaschinen Ag Leitelement für Bogeninspektion
DE202007009389U1 (de) 2007-07-04 2007-08-30 Man Roland Druckmaschinen Ag Bogenführung für Bogeninspektionssystem
DE102010003046A1 (de) * 2010-03-19 2011-09-22 Koenig & Bauer Aktiengesellschaft Vorrichtung und Verfahren zum Führen eines Bogens unter Inline-Messsystemen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19546046A1 (de) * 1995-12-09 1997-06-12 Heidelberger Druckmasch Ag Bogenführsystem für eine Druckmaschine
DE19701230C1 (de) * 1997-01-16 1998-02-19 Roland Man Druckmasch Pneumatische Bogenleiteinrichtung in einer Druckmaschine
DE202006011273U1 (de) 2006-07-21 2006-10-05 Man Roland Druckmaschinen Ag Leitelement für Bogeninspektion
DE202007009389U1 (de) 2007-07-04 2007-08-30 Man Roland Druckmaschinen Ag Bogenführung für Bogeninspektionssystem
DE102010003046A1 (de) * 2010-03-19 2011-09-22 Koenig & Bauer Aktiengesellschaft Vorrichtung und Verfahren zum Führen eines Bogens unter Inline-Messsystemen

Also Published As

Publication number Publication date
EP4059716B1 (fr) 2024-07-10
CN115157854A (zh) 2022-10-11

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