EP0796734A1 - Cylindre de transfert de feuilles pour machine à imprimer - Google Patents

Cylindre de transfert de feuilles pour machine à imprimer Download PDF

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Publication number
EP0796734A1
EP0796734A1 EP96118805A EP96118805A EP0796734A1 EP 0796734 A1 EP0796734 A1 EP 0796734A1 EP 96118805 A EP96118805 A EP 96118805A EP 96118805 A EP96118805 A EP 96118805A EP 0796734 A1 EP0796734 A1 EP 0796734A1
Authority
EP
European Patent Office
Prior art keywords
drum
sheet
jacket
guiding
air
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
EP96118805A
Other languages
German (de)
English (en)
Other versions
EP0796734B1 (fr
Inventor
Hanns-Otto Haas
Norbert Kreuzer
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.)
Manroland AG
Original Assignee
MAN Roland 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
Priority claimed from DE19611590A external-priority patent/DE19611590C1/de
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0796734A1 publication Critical patent/EP0796734A1/fr
Application granted granted Critical
Publication of EP0796734B1 publication Critical patent/EP0796734B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/041—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands and introducing into a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F22/00—Means preventing smudging of machine parts or printed articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/25—Damages to handled material
    • B65H2601/251—Smearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a sheet-guiding drum for a printing machine for smear-free sheet transport according to the preamble of claim 1.
  • a sheet-guiding drum of this type is known from DE 3 347 886 C2.
  • the drum body has an outer surface made of a porous, air-permeable material.
  • An air cushion generated on the outer surface prevents the printed sheets transported in the direction of sheet travel from being smeared, the air being conducted from the inside of the drum to the surface thereof.
  • DE 4 223 839 C1 discloses a sheet-guiding drum which also has through openings in its outer surface. Blown air is generated inside the drum by means of a radial fan which is rotatably mounted coaxially to the cylinder axis and which is connected to the ambient air at the end face via openings arranged in the side walls of the drum.
  • the radial fan has a drive which is adjustable in speed independently of the sheet-guiding drum.
  • the object of the invention is to develop a sheet-guiding drum which ensures a smear-free sheet guidance of printed sheets with little construction effort. This is solved by the training features of the main claim. Further training results from the subclaims.
  • the sheet-guiding drum ensures smear-free transport of printed and / or painted sheets.
  • the sheet coming from an upstream printing press cylinder is kept with the printed side away from the lateral surface of the sheet-guiding drum by an air cushion.
  • the drum is suitable for a take-up drum arranged in the boom, as well as Transfer drum between printing units, coating units or further processing stations or in their combination.
  • a sheet-guiding drum 1 is arranged as a take-up drum in the delivery of a sheet-processing printing machine.
  • the boom is formed in a manner known per se by a chain conveyor system 4 rotating in the sheet running direction 9, on which gripper systems 3 for sheets 2 to be laid out for transport are arranged.
  • the drum 1 is preceded by a printing press cylinder 10 belonging to a coating unit.
  • a sheet guide device 8 is arranged, which can be acted upon either with blowing or suction air.
  • a sheet brake unit 7 is arranged, which serves to decelerate the speed of the sheets 2 to be deposited on the delivery stack 5.
  • the sheet-guiding drum 1 is arranged as a transfer drum between two printing units, a printing unit being formed by a plate cylinder 12, a blanket cylinder 11 and a printing press cylinder 10.
  • a printing unit being formed by a plate cylinder 12, a blanket cylinder 11 and a printing press cylinder 10.
  • Other well-known assemblies such as inking and dampening units will not be discussed further here.
  • FIG. 3 shows the sheet-guiding drum 1 as a removal drum with a shaft 14 mounted on the frame.
  • the fans 15 are coupled in terms of circuitry to an electrical voltage supply.
  • the rotatably mounted drum jacket 13 is provided with openings 23 for the escape of air.
  • a closed guide plate 22 is fixed to the frame in the non-leading area of the drum 1 within the drum shell 13 to improve the efficiency.
  • the drum jacket 13 has a plurality of openings 23.
  • the drum jacket 13 can likewise be formed by porous material or in combination with openings and porous material.
  • the drum 1 is designed as a removal drum.
  • the shaft 14 is mounted in a frame 6 arranged on both sides.
  • a connector 16 is attached to the frame 6 and carries a partition plate 17.
  • the partition plate 17 extends essentially over the side surfaces of the drum 1. Facing the frame 6, the fans 15 on the partition plate 17 are fixed to the frame arranged.
  • a sprocket 19 is fixed on the rotatable shaft 14 with a flange 21 adjacent to the partition plate 17.
  • a chain 18 of the chain conveyor system 4 is guided over the chain wheel 19, to which the gripper systems 3 are fastened in a known manner.
  • the drum jacket 13 is attached to the sprocket 19 on each side of the frame. Partition plate 17 and sprocket 19 have openings 20 so that the air generated by fans 15 is connected to the hollow interior of the drum 1.
  • the design is not limited to the take-up drum which interacts with rotating gripper systems 3. Rather, the drum 1 can also be designed as a transfer drum with gripper bridges fixedly arranged on the circumference.
  • the structure is equivalent to the take-up drum according to FIG. 4.
  • the drum jacket 13 is supported on the shaft 14 when it is designed as a transfer drum.
  • the partition plate 17 with fans 15 is arranged fixed to the frame, analogous to the design as a removal drum.
  • a baffle 22 is arranged in the area of the transfer drum that does not lead to the bend in the upper circular sector (FIG. 2).
  • a drying function for the sheet can be achieved by means of the drum 1.
  • the heating element 24 is fixedly arranged on the partition plate 17 in front of the sprocket 19.
  • the heating element 24 is designed, for example, as a heating wire element, which is connected to the machine control in terms of circuitry and can be switched on if required.
  • a sheet 2 is transferred from a printing press cylinder 10 to the drum 1.
  • the fans 15 built up a rotating air cushion on the drum casing 13 so that the sheet is guided on the drum casing 13 without contact.
  • the sheet guide devices 8 assigned to the drum 1 are supplied with blown air (with perfect and reverse printing) or with suction air (with straight printing).
  • the sheet 2 is deflected by the drum 1 and, if it is designed as a take-up drum, is guided from the gripper system 3 to the delivery stack 5.
  • the sheet 2 guided in the gripper closure is transferred to a printing press cylinder 10 arranged downstream in the sheet travel direction 9.
  • the drum jacket 13 rotates while the partition plates 17 are fixed with fans 15. There is a small gap between the drum jacket 13 and the bulkhead 17.
  • the drum casing 13 is designed as a take-up drum, it is driven by the rotating sprocket 19.
  • it is designed as a transfer drum, it is driven by the machine drive and the shaft 14.
  • the drying time can be shortened by switching on the heating elements 24.
  • the air supplied to the drum 1 is heated and emerges from the openings 23 of the drum shell 13.
  • the fans 15 are switched to blown air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP96118805A 1996-03-23 1996-11-23 Cylindre de transfert de feuilles pour machine à imprimer Expired - Lifetime EP0796734B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19611590 1996-03-23
DE19611590A DE19611590C1 (de) 1995-12-15 1996-03-23 Bogenführende Trommel für eine Druckmaschine

Publications (2)

Publication Number Publication Date
EP0796734A1 true EP0796734A1 (fr) 1997-09-24
EP0796734B1 EP0796734B1 (fr) 1999-05-26

Family

ID=7789246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118805A Expired - Lifetime EP0796734B1 (fr) 1996-03-23 1996-11-23 Cylindre de transfert de feuilles pour machine à imprimer

Country Status (2)

Country Link
EP (1) EP0796734B1 (fr)
AT (1) ATE180438T1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347886A1 (de) * 1983-08-06 1985-05-30 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Abschmierfreie umfuehrtrommel fuer bogenrotationsdruckmaschinen
DE4223839C1 (de) 1992-07-20 1993-12-23 Heidelberger Druckmasch Ag Bogenführungszylinder einer Druckmaschine
DE4434778C1 (de) * 1994-09-29 1995-11-30 Roland Man Druckmasch Bogenführungsmodul für eine Wendeeinrichtung in einer für Schöndruck oder Schön- und Wiederdruck einsetzbaren Rotationsdruckmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347886A1 (de) * 1983-08-06 1985-05-30 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Abschmierfreie umfuehrtrommel fuer bogenrotationsdruckmaschinen
DE3347886C2 (fr) 1983-08-06 1988-08-18 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
DE4223839C1 (de) 1992-07-20 1993-12-23 Heidelberger Druckmasch Ag Bogenführungszylinder einer Druckmaschine
DE4434778C1 (de) * 1994-09-29 1995-11-30 Roland Man Druckmasch Bogenführungsmodul für eine Wendeeinrichtung in einer für Schöndruck oder Schön- und Wiederdruck einsetzbaren Rotationsdruckmaschine

Also Published As

Publication number Publication date
ATE180438T1 (de) 1999-06-15
EP0796734B1 (fr) 1999-05-26

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