EP0792742B2 - Bogentransportvorrichtung und Verfahren zur Führung von bogenförmigem Material in einer Druckmaschine, insbesondere in einer Bogenrotations-Offsetdruckmaschine - Google Patents

Bogentransportvorrichtung und Verfahren zur Führung von bogenförmigem Material in einer Druckmaschine, insbesondere in einer Bogenrotations-Offsetdruckmaschine Download PDF

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Publication number
EP0792742B2
EP0792742B2 EP96118243A EP96118243A EP0792742B2 EP 0792742 B2 EP0792742 B2 EP 0792742B2 EP 96118243 A EP96118243 A EP 96118243A EP 96118243 A EP96118243 A EP 96118243A EP 0792742 B2 EP0792742 B2 EP 0792742B2
Authority
EP
European Patent Office
Prior art keywords
nozzles
zone
guide surface
zones
blowing
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
EP96118243A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0792742A1 (de
EP0792742B1 (de
Inventor
Michael Gieser
Günter Stephan
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7786596&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0792742(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0792742A1 publication Critical patent/EP0792742A1/de
Publication of EP0792742B1 publication Critical patent/EP0792742B1/de
Application granted granted Critical
Publication of EP0792742B2 publication Critical patent/EP0792742B2/de
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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • 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
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/245—Air blast devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
    • B65H5/228—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by air-blast devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • 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
    • B65H2406/113—Details of the part distributing the air cushion
    • B65H2406/1132—Multiple nozzles arrangement
    • 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 transport device and a method of guiding arcuate Material in a printing press, in particular a sheet-fed rotary offset printing machine, according to the preamble of claims 1, 2 and 11.
  • DE-OS 44 06 844 is a device for hovering sheets in a rotary printing machine known in the case of a guide surface in three in the direction of the sheet guide, arranged across the width of the sheet guide surface Zones are let in, both in the beautiful as well as in the beautiful and reverse printing of Blowing air must always be applied to the press and a reliable levitation of the bow in to ensure the two operating modes.
  • nozzles have a blowing direction that essentially to the side and to the rear edge of the sheet is directed so that both a lateral tightening of the Bow, as well as a tightening of the bow in the longitudinal direction of the bow in these lateral guide zones.
  • the scripture gives no indication of the blowing direction of the nozzles in the middle zone in the sheet transport direction and in the middle zone arranged nozzles in the perfecting mode to be blown with air and this in straight printing off.
  • WO / A / 92/05467 describes a transport device for photographic films, which one Transport surface with rows of nozzles running in the longitudinal direction which has a total of three each Longitudinally assigned nozzle rows assigned Blow boxes are charged with blown air.
  • the blowing direction of the in the middle of the film material Zone arranged blowing nozzles points in Film transport direction, whereas that on the side edges arranged on the transport surface Have blowing direction that the sheet transport direction is opposite.
  • the object of the invention is to be achieved to create an apparatus and method with those during the perfecting operation a reliable levitation of the bilateral printed sheet is guaranteed and with which in straight printing at high printing speeds extremely short set-up times, as well also a reliable and effective tightening of the bow let achieve. It is also a task of Invention, the energy requirement and the device effort for sheet guiding in straight printing reduce.
  • the invention has the particular advantage on that with her switching the sheet guide between straight printing and face and reverse printing the printing press without complex adjustment work is possible. Furthermore, the invention Device the advantage that they are particularly without problems in the area of dry sections, in which there is high heat development and in which the use of switchable in their direction of rotation Axial fans or axial fans are not possible is, can be used.
  • the device 1 shown in Fig. 1 for Guiding sheet material 2 in a printing press has a guide surface 4, over the the bow 2 into the one marked by the arrow A. Sheet guiding direction is moved away.
  • the leadership area 4 points in the preferred embodiment of the invention as shown in FIG. 1 and FIG. 2 as a whole three are in the longitudinal direction of the guide surface 4 extending zones 6, 8, 10, of which the zone 6 in the middle of the guide surface 4 and zones 8 and 10 corresponding to the side edges of the guide surface 4 are arranged.
  • zones 6, 8, 10 are Blown air nozzles 12, 14, 16 arranged, which in the figures are shown only schematically and their blowing directions are indicated by associated arrows.
  • the blowing direction in the middle or first zone 6 arranged blowing nozzles 12 points in the preferred Embodiment of the invention essentially in the transport direction A of the sheet 2, however, can also a component in the direction of Have sides of the sheet guide surface 4.
  • the blowing direction which in the right or second zone 8 of Fig. 1 and 2 arranged on the right side of the guide surface 4 Blow nozzles 14 essentially have in Direction of the right side edge of the guide surface 4, and the blowing direction in the left or third zone 10 arranged blowing nozzles 16 essentially has to the left edge of the guide surface 4.
  • the blowing direction the nozzles 14 and 16 preferably run at an angle of 90 ° to the transport direction A, can, however, also be in a range from 30 to 120 °.
  • the nozzles 12, 14, 16 can each have any shape of nozzle and are preferred in the Embodiment of the invention by im State of the art, for example in the an existing guide surface 4 punched into a flat sheet Slot nozzles with preferably diverging Blown air jets formed.
  • the blowing direction in relation on the guide surface 4 is at least in the lateral Nozzles 14, 16, as shown in FIGS. 3 and 4, essentially directed tangentially, but can also a component in the direction of the surface normal have the guide surface 4.
  • the blowing direction of this lateral nozzles 14 and 16 is shown in Fig. 3 shown.
  • the blowing direction in the middle zone 6 nozzles 12 is arranged with respect to the guide surface 4 preferably also essentially tangential directed, but can in the same way as in the nozzles 14 and 16 also have a vertical component to the guide surface 4. Furthermore, it can be provided be that to produce an improved Levitation around the nozzles 12 of the middle zone 6 around, not shown in the figures, by a round opening in the central zone 6 blow nozzles formed are provided, the blowing direction of which is only one Component in the direction of the surface normal of the Has guide surface 4.
  • the distribution of the nozzles 14 and 16 over the side edge zones 8 and 10 is at preferred embodiment of the invention chosen such that the blowing jets of the near the middle zone 6 arranged nozzles between run through the outermost nozzles and not directly to the center of the farther outside lying nozzles are directed.
  • This allows one uniform essentially vortex free flow of achieve side nozzles 14 and 16, which at Transport of a sheet 2 over the guide surface 4 for a lateral tightening of the arch both in the Schönals also ensures beautiful and reverse printing.
  • the Occupancy density at nozzles in zones 6, 8 and 10 can be both homogeneous and uniform in one zone, as well as inhomogeneous, e.g. B. from the center of the guide surface 4 decreasing towards the side edges, his
  • Fig. 1 As shown in Fig. 1 are below the zones 6, 8, 10 separate blow boxes 18, 20 assigned to them and 22 arranged, the unspecified Lines with associated fans 24, 26 and 28 in terms of flow are connected and the blow boxes 18, 20 and 22 during the perfecting mode supply blown air to the press.
  • these Embodiments of the invention will be any blow box supplied by its own fan 24, 26, 28. The required amount of air is preferred by a correspondingly variable speed of the Blower 24, 26, 28 reached because of the effort for corresponding throttle valves.
  • blowers 24, 26 and 28 can also be operated with throttle valves 30, 32 and 34 with the blow boxes 18, 20 and 22 be connected. The amount of air over the Throttle position of valves 30, 32 and 34 set.
  • the blowing air generates in perfect and reverse printing mode under sheet 2 a constant air cushion on which the sheet 2 is secure and at a constant distance from the guide surface 4 passed over the guide surface 4 is, in which case the printed sheet underside does not come into contact with the guide surface 4.
  • the fan speed accordingly or the valves
  • the floating state between the sheet 2 and the guide surface 4 in the Zones 6, 8, 10 are adjusted accordingly, whereby depending on the production speed the printing press in perfecting mode reliable and trouble-free sheet guidance can be achieved.
  • blow boxes 120 and 122 in terms of flow connected and are about a common fan 128 and an associated one Flow throttle 132 is charged with blown air. In this Traps are only two fans for the device 124, 128 sufficient.
  • blow boxes 18, 118, 20, 120 and 22, 122 by only a, shown in Fig. 2 in dashed lines Blower 200 and corresponding flow restrictors 210 and 212 can be supplied with blown air.
  • a Shut-off valve 214 included, with which the blown air supply interrupt to the middle blow box 18, 118 leaves, so that the blown air supply of the middle Blow box 18, 118 is turned off while the side Blow boxes 20, 120 and 22, 122 through the blower 200 continue to be blown with air.
  • the shut-off function is also through Combination of valves 210 and 214 in a common Unity possible.
  • the Lowering the arch 2 in the central zone 6 is based on the so-called ejector effect, which thereby is caused that the outward air flow the side nozzles 14 and 16 between the arch 2 and the guide surface 4 in the middle Zone 6 entrains air and transports it outside, so that this area is evacuated and a Vacuum occurs when the fan is off 24, 124 or closed shut-off valve 214 none or only a little air flows through the nozzles 12.
  • the Sheet 2 is therefore with its underside in the area of Zone 6 sucked on the guide surface 4 and slides on this, which makes a
  • the arch 2 is tightened in the longitudinal direction of the arch, which together with that through the outside directed air flow in the lateral zones 8 and 10 lateral tightening of the arch 2 in Fine printing operation of the printing press a trouble-free Guaranteed sheet travel.
  • blowing air on or off in the middle zone 6 can thus be easier and more convenient Way between the perfecting and reverse printing the printing press, in which the blowing air is switched on and a clean levitation guide shown in Fig. 3 of the bow, and that shown in FIG. 4 Face printing, in which the unprinted Lower edge of the sheet in the area of the middle zone 6 slides on the guide surface 4, can be switched.
  • the blowing air for a safe sheet run set once in perfecting mode the printer can switch between the two operating modes Face printing and perfecting through single and single Switch off the blown air in zone 6 inside switch over in the shortest possible time without further adjustments of air volumes and air routing.
  • there is the advantage that for Sucking the sheet in zone 6 in straight printing no suction fan is required and therefore the equipment and the energy requirement of the invention Device 1 in the straight printing mode can be greatly reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP96118243A 1996-02-28 1996-11-14 Bogentransportvorrichtung und Verfahren zur Führung von bogenförmigem Material in einer Druckmaschine, insbesondere in einer Bogenrotations-Offsetdruckmaschine Expired - Lifetime EP0792742B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19607397 1996-02-28
DE19607397A DE19607397A1 (de) 1996-02-28 1996-02-28 Vorrichtung und Verfahren zur Führung von bogenförmigem Material in einer Druckmaschine, insbesondere in einer Bogenrotations-Offsetdruckmaschine

Publications (3)

Publication Number Publication Date
EP0792742A1 EP0792742A1 (de) 1997-09-03
EP0792742B1 EP0792742B1 (de) 2000-02-09
EP0792742B2 true EP0792742B2 (de) 2002-12-11

Family

ID=7786596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118243A Expired - Lifetime EP0792742B2 (de) 1996-02-28 1996-11-14 Bogentransportvorrichtung und Verfahren zur Führung von bogenförmigem Material in einer Druckmaschine, insbesondere in einer Bogenrotations-Offsetdruckmaschine

Country Status (4)

Country Link
US (2) US5797327A (enExample)
EP (1) EP0792742B2 (enExample)
JP (1) JP3924343B2 (enExample)
DE (2) DE19607397A1 (enExample)

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JP3924343B2 (ja) 2007-06-06
EP0792742A1 (de) 1997-09-03
US5927203A (en) 1999-07-27
JPH101238A (ja) 1998-01-06
DE59604421D1 (de) 2000-03-16
DE19607397A1 (de) 1997-09-04
EP0792742B1 (de) 2000-02-09
US5797327A (en) 1998-08-25

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