EP0405166B1 - Vorrichtung zur Bogenglättung am Druckzylinder in einer Bogenrotationsdruckmaschine - Google Patents

Vorrichtung zur Bogenglättung am Druckzylinder in einer Bogenrotationsdruckmaschine Download PDF

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Publication number
EP0405166B1
EP0405166B1 EP90110278A EP90110278A EP0405166B1 EP 0405166 B1 EP0405166 B1 EP 0405166B1 EP 90110278 A EP90110278 A EP 90110278A EP 90110278 A EP90110278 A EP 90110278A EP 0405166 B1 EP0405166 B1 EP 0405166B1
Authority
EP
European Patent Office
Prior art keywords
sheet
printing
impression cylinder
nozzle
blower nozzle
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
EP90110278A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0405166A2 (de
EP0405166A3 (en
Inventor
Arno Wirz
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 AT90110278T priority Critical patent/ATE102546T1/de
Publication of EP0405166A2 publication Critical patent/EP0405166A2/de
Publication of EP0405166A3 publication Critical patent/EP0405166A3/de
Application granted granted Critical
Publication of EP0405166B1 publication Critical patent/EP0405166B1/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
    • B41F25/00—Devices for pressing sheets or webs against cylinders, e.g. for smoothing purposes
    • 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
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast
    • B65H2406/122—Nozzles
    • B65H2406/1222—Nozzles adjustable impact angle

Definitions

  • the invention relates to a device for smooth application of printing sheets to the printing cylinder in front of the printing nip of a sheet-fed rotary printing press with generic features according to the preamble of patent claim 1.
  • EP-A-0 306 684 describes a device for sheet smoothing in a multicolor sheet-fed rotary printing press, which is arranged behind the printing nip above the printing cylinder of a printing unit and has blowing fingers which are arranged in a rotationally fixed manner on a blast finger tube over the width of the printing cylinder with a uniform spacing from one another , so that the blowing fingers in their lower area, which are provided with air outlet openings, have an air outlet surface adapted to the outer contour of the printing cylinder, which is guided up to the tangent point between a downstream arc-turning cylinder and the printing cylinder, the blowing fingers together with the blowing finger tube by means of an adjustment device in the straight printing from the direction Tangent point can be lifted off and stored on fixed machine parts in perfecting in the direction of the tangent point.
  • This device is thus effective behind the printing nip to smoothly apply the sheet printed in face-to-face printing in the area in front of the tangent point between a sheet turning cylinder and the upstream printing cylinder to the closed surface of the printing cylinder until the sheet end is detected by the sheet turning cylinder due to the action of flowing air.
  • this publication it also belongs to the prior art that axially parallel blow strips are distributed in front of the printing zone above a printing cylinder are arranged so that the sheet is smoothly spread on the surface of the impression cylinder by means of blowing air.
  • a device with a blowpipe and nozzles that can be adjusted in the blowing direction for blowing a printing sheet against a feed drum in a multi-color sheet-fed rotary printing press is known from DE-OS 25 50 721. However, it is not intended to smooth the printing sheet on the circumference of the printing cylinder.
  • DE-PS 1 061 798 arranged in front of the printing nip, smooth brushes which are effective against the circumference of the printing cylinder, are lifted off when passing the leading edge of the sheet and smoothly sweep the sheet against the printing cylinder after its leading edge has passed.
  • the invention solves this problem by training features according to the characterizing part of patent claim 1.
  • a particularly advantageous effect of the features of the invention is seen in connection with a sword nozzle effective as an air knife, the nozzle opening of which extends over a substantial part of the width of the printing cylinder, preferably over its entire width, and which is at a distance in front of the printing nip the circumference of the impression cylinder is directed.
  • the swivel angle with air outlet from the sword nozzle can be brought more or less close to the normal through the swivel axis of the blow nozzle onto the circumference of the printing cylinder. Closer to stiffer types of paper than thinner types of paper.
  • the sword nozzle swivels out of the air, possibly via the tangent to the pressure cylinder, through the pivot axis of the sword nozzle.
  • a swivel position can be achieved in which no air flow is effective on the printed sheet. When the sheet leading edge passes by, there is no blowing effect on the sheet, so that underblowing of the sheet is prevented.
  • This can be achieved in that the sword nozzle is swung into a tangent to the pressure cylinder through the pivot axis of the sword nozzle when the sheet leading edge passes, or in that an air control interrupts the blown air as the sheet leading edge passes.
  • a lever mechanism with cam control is suitable for driving the oscillating oscillating movement of the sword nozzle in the machine's work cycle.
  • a plurality of oscillating smoothing nozzles with the above-described training features can be arranged one behind the other in the circumferential direction of the printing cylinder. It is also possible to arrange an oscillating smoothing nozzle in connection with a blowing nozzle which may be adjustable in the blowing direction but is fixed during operation in front of the pressure gap or behind the pressure gap.
  • FIG. 1 shows schematically a side view of a printing unit of a multi-color sheet-fed rotary printing press.
  • the printed sheet 1 taken over from a preceding printing unit is from a transfer drum 2 to the printing cylinder 3 of a subsequent printing unit.
  • the sheet grippers 4 grip the printing sheet 1 at the tangent point between the transfer drum 2 and the printing cylinder 3 and pull the printing sheet 1 through the printing gap 5 between the printing cylinder 3 and the blanket cylinder 6. Behind the printing gap 5, the printing sheet 1 is fed to a further transfer drum 7 which passes the printed sheet 1 to another printing unit.
  • a blowing nozzle 8 is directed against the circumference of the printing cylinder 3 at a certain distance in front of the printing gap 5 and is mounted such that it can oscillate about a pendulum axis 9 and can be coupled to a drive that drives the Blowing nozzle 8 moves back and forth in the machine's working cycle, swinging in the direction of travel of the sheet.
  • the blowing nozzle 8 is particularly advantageously designed as a sword nozzle according to the illustration in FIG. 2, the nozzle opening of which extends at least over a substantial part of the width of the printing cylinder 3, advantageously over its entire width.
  • the angular range for the oscillating movement of the blowing nozzle 8 is adjustable, in such a way that both the angle of attack alpha (FIGS. 5 and 6) of the blowing direction with respect to the normal 10 through the pendulum axis 9 on the circumference of the printing cylinder 3 and the pivoting angle beta ( 1 and 4) are adjustable.
  • the blowing nozzle 8 is fastened to a tube 11 which is adjustable in the circumferential direction thereof and which is mounted in the frame 12 of the machine so that it can swing about its longitudinal axis.
  • a lever mechanism 13 with a cam control or the like is suitable for driving the pendulum movement of the blowing nozzle 8, and in the case of the example intended.
  • the blow nozzle 8 is pushed with a tubular housing 17 onto the jacket of a valve collar 14, which is adjustable relative to a frame part 15 by means of a screw 16.
  • the valve collar 14 is guided laterally by a driver 18.
  • a radially directed connection 19 for the air line passes through the housing 17 and is fastened with the inner end in the valve collar 14.
  • this connection can be moved radially in a range corresponding to the setting angle range.
  • an adjustment can be made to change the angle of attack alpha relative to the normal 10.
  • the pivot angle beta is set in the selected embodiment by the lever gear 13.
  • the air control for the blower nozzle takes place by covering radial openings in the tube 11 with the inner end of the connection 19 or the passage in the housing 17 to the blower nozzle 8. At the smallest angle of attack alpha, the air flow from the blower nozzle 8 is almost perpendicular to the outer surface of the printing cylinder 3 directional.
  • the center of the pendulum movements of the blowing nozzle 8 lies approximately on the tangent to the printing cylinder 3, which is defined by the pendulum axis 9, so that the blowing nozzle 8 comes out of a pivoted-back zero position without air supply, which is shown in FIG. 3 with full lines and in FIG. 4 with dashed lines is oscillating until it reaches a front position, which is shown in FIG. 4 with solid lines.
  • This has the advantage that, especially when processing cardboard sheets in machines with bypass drums without a cover sheet in the swiveling angle range beta 1, an air stream can be directed onto the rear end of the sheet in order to press it away from the shaft of the bypass drum 2 and thus prevent signs of smearing.
  • the air pushes out of the Blower nozzle 8 against the circumference of the printing cylinder 3.
  • the swiveling movement of the blowing nozzle 8 advantageously takes place against the running direction of the sheet 1 on the circumference of the printing cylinder 3.
  • the air flow from the blowing nozzle 8 can be interrupted when the leading edge of the printing sheet 1 runs past, or the blowing nozzle can be in a swivel position which prevents the passing printing sheet from blowing on its leading edge.
  • the blower nozzle 8 can advantageously be fixed in the swiveled-back end position, as is shown, for example, in FIG. 4 with dashed lines, or can be uncoupled from the drive in order to enable a shutdown when the blower nozzle is not required for printing processes.
  • a further pendulum nozzle 20 is indicated schematically, which can be coupled to the tube 11 or the lever gear 13 by a further lever gear 21.
  • the pendulum angle of the nozzle 20 can deviate from the pendulum angle of the nozzle 8 and the set angle of attack can also be different.
  • an adjustable nozzle that is stationary during operation can also be provided at this point.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Rotary Presses (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP90110278A 1989-06-24 1990-05-30 Vorrichtung zur Bogenglättung am Druckzylinder in einer Bogenrotationsdruckmaschine Expired - Lifetime EP0405166B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90110278T ATE102546T1 (de) 1989-06-24 1990-05-30 Vorrichtung zur bogenglaettung am druckzylinder in einer bogenrotationsdruckmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3920730A DE3920730A1 (de) 1989-06-24 1989-06-24 Vorrichtung zur bogenglaettung am druckzylinder in einer bogenrotationsdruckmaschine
DE3920730 1989-06-24

Publications (3)

Publication Number Publication Date
EP0405166A2 EP0405166A2 (de) 1991-01-02
EP0405166A3 EP0405166A3 (en) 1991-07-31
EP0405166B1 true EP0405166B1 (de) 1994-03-09

Family

ID=6383489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110278A Expired - Lifetime EP0405166B1 (de) 1989-06-24 1990-05-30 Vorrichtung zur Bogenglättung am Druckzylinder in einer Bogenrotationsdruckmaschine

Country Status (7)

Country Link
US (1) US5086698A (ja)
EP (1) EP0405166B1 (ja)
JP (1) JPH0336033A (ja)
CN (1) CN1017034B (ja)
AT (1) ATE102546T1 (ja)
CA (1) CA2015948C (ja)
DE (2) DE3920730A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19516374A1 (de) * 1995-05-04 1996-11-07 Kba Planeta Ag Blaseinrichtung zur Bogenführung

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ATE113533T1 (de) * 1990-12-10 1994-11-15 Heidelberger Druckmasch Ag Vorrichtung zur bogenglättung am druckzylinder in einer bogenrotationsdruckmaschine.
DE4217813C2 (de) * 1992-05-29 1996-06-05 Heidelberger Druckmasch Ag Vorrichtung zum Erzielen einer flächigen Anlage von Bedruckstoffen
DE4410189A1 (de) * 1994-03-24 1995-09-28 Heidelberger Druckmasch Ag Leiteinrichtung für bewegtes Bogenmatrial in Druckmaschinen
DE4430105C2 (de) * 1994-08-25 1996-07-04 Roland Man Druckmasch Verfahren und Vorrichtung zur flächigen Führung von im Greiferschluß fixierten Bogen auf einer gekrümmten Oberfläche eines Zylinders einer Roationsdruckmaschine
DE9416106U1 (de) * 1994-10-06 1994-11-24 Heidelberger Druckmaschinen Ag, 69115 Heidelberg Bogenleitblech für eine Wendeeinrichtung
DE19549845B4 (de) * 1995-06-24 2007-07-12 Heidelberger Druckmaschinen Ag Vorrichtung zur Erzielung einer einwandfreien Auflage eines Bedruckstoffes in einer Druckmaschine
DE19624196C2 (de) * 1996-06-18 1999-09-23 Koenig & Bauer Ag Vorrichtung und Verfahren Bogenführung bei einer qualitativen Beurteilung von bearbeiteten Bogen
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DE10150842B4 (de) * 2000-11-15 2013-11-21 Heidelberger Druckmaschinen Ag Speichereinrichtung zur Wendung bogenförmigen Materials
DE10158486A1 (de) * 2001-01-05 2002-07-11 Heidelberger Druckmasch Ag Einrichtung zur Trennung benachbarter flächiger Exemplare
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Publication number Priority date Publication date Assignee Title
DE19516374A1 (de) * 1995-05-04 1996-11-07 Kba Planeta Ag Blaseinrichtung zur Bogenführung
DE19516374B4 (de) * 1995-05-04 2005-08-11 Koenig & Bauer Ag Blaseinrichtung zur Bogenführung

Also Published As

Publication number Publication date
ATE102546T1 (de) 1994-03-15
CA2015948A1 (en) 1990-12-24
CN1017034B (zh) 1992-06-17
US5086698A (en) 1992-02-11
EP0405166A2 (de) 1991-01-02
DE3920730C2 (ja) 1991-10-10
CA2015948C (en) 1995-01-17
DE59004865D1 (de) 1994-04-14
CN1048353A (zh) 1991-01-09
DE3920730A1 (de) 1991-01-10
EP0405166A3 (en) 1991-07-31
JPH0336033A (ja) 1991-02-15

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