EP0417497B1 - Transfer drum in rotary presses - Google Patents

Transfer drum in rotary presses Download PDF

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Publication number
EP0417497B1
EP0417497B1 EP90115642A EP90115642A EP0417497B1 EP 0417497 B1 EP0417497 B1 EP 0417497B1 EP 90115642 A EP90115642 A EP 90115642A EP 90115642 A EP90115642 A EP 90115642A EP 0417497 B1 EP0417497 B1 EP 0417497B1
Authority
EP
European Patent Office
Prior art keywords
drum
transfer drum
sheet
bristles
round brushes
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
EP90115642A
Other languages
German (de)
French (fr)
Other versions
EP0417497A3 (en
EP0417497A2 (en
Inventor
Helmut Emrich
Uwe Sabrowski
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
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT90115642T priority Critical patent/ATE91967T1/en
Publication of EP0417497A2 publication Critical patent/EP0417497A2/en
Publication of EP0417497A3 publication Critical patent/EP0417497A3/en
Application granted granted Critical
Publication of EP0417497B1 publication Critical patent/EP0417497B1/en
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
    • B41F22/00—Means preventing smudging of machine parts or printed articles
    • 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
    • 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

Definitions

  • the invention relates to a sheet guide drum in rotary printing machines according to the preamble of claim 1.
  • a sheet guide drum with the features specified above is known from GB-PS 972 487.
  • the sheets are carried by a number of support rollers arranged on bars, which smear or scratch the printed image if they are not adjusted to non-pressure points by axial displacement.
  • suitable non-printing areas are not always present in the printed image.
  • US Pat. No. 3,054,348 describes a sheet guide drum, the surface of which is formed by a plurality of brush rings which are arranged next to one another and spaced apart on the drum axis and which have the drum diameter.
  • the brush rings are attached to disks that are arranged on the drum shaft.
  • the object of the invention is to provide sheet-bearing brush bodies of a sheet guide drum in rotary printing presses which do not move relative to the freshly printed side of the sheet.
  • the advantage of the invention is that with the easy rotatability of the round brushes, which have a low moment of inertia, no relative movements between the round brushes and the bends can occur.
  • the bristles thus form flexible support points without smearing or scratching of the printed image being possible, even in the case of sheet guide drums designed as chain deflecting drums.
  • the sheet guide drum 1 shown in FIGS. 1 and 2 has just taken over a freshly printed sheet 3 from an upstream printing cylinder 4 by the gripper systems 2 and transports it into the subsequent printing unit or to a sheet delivery station, not shown.
  • the sheet guide drum 1 has two circular sector end disks 5, 6, which are firmly seated on the drum shaft 7.
  • the bristles 12 of the round brushes 11 are preferably made of a color-repellent material, e.g. made of nylon, polyester or the like with a suitable rigidity.
  • the brush body of the round brushes 11 is preferably cylindrical. However, there are also other outer contours of the bristles 12, e.g. a spherical design or possibly also bristles 12 inclined relative to the brush body are conceivable.
  • the bristles 12 can be cleaned very easily, e.g. by dry rubbing or by wet washing using the usual detergents, but only after a long period of use.
  • the rods 10 can also be axially resiliently mounted in a known manner, so that they are easily completely interchangeable, which is not shown in the drawing.

Abstract

In order to support freshly printed sheets (3) without marking on a transfer drum (1) in rotary presses, the transfer drum (1) is provided on the drum circumference with bars (10) which extend parallel to the axis of the transfer drum (1), and on which a multiplicity of small round brushes (11) with ink-resisting bristles (12) are arranged closely adjacently over the width of the maximum sheet format so as to be easily rotatable. <IMAGE>

Description

Die Erfindung betrifft eine Bogenführungstrommel in Rotationsdruckmaschinen nach dem Oberbegriff des Patentanspruches 1.The invention relates to a sheet guide drum in rotary printing machines according to the preamble of claim 1.

Eine Bogenführungstrommel mit den eingangs spezifizierten Merkmalen ist aus der GB-PS 972 487 bekannt.A sheet guide drum with the features specified above is known from GB-PS 972 487.

Nachteilig ist, daß die Bogen von einer Anzahl auf Stäben angeordneter Tragrollen getragen werden, welche das Druckbild verschmieren oder verkratzen, wenn sie nicht durch axiales Verschieben auf druckfreie Stellen eingestellt sind. Abgesehen davon, daß die Einstellung sehr zeitaufwendig ist, sind auch geeignete druckfreie Stellen im Druckbild nicht immer vorhanden.It is disadvantageous that the sheets are carried by a number of support rollers arranged on bars, which smear or scratch the printed image if they are not adjusted to non-pressure points by axial displacement. In addition to the fact that the setting is very time-consuming, suitable non-printing areas are not always present in the printed image.

In der US-PS 3 054 348 ist eine Bogenführungstrommel beschrieben, deren Oberfläche von mehreren nebeneinander mit Abstand auf der Trommelachse angeordneten Bürstenkränzen gebildet wird, welche den Trommeldurchmesser aufweisen. Die Bürstenkränze sind auf Scheiben befestigt, die auf der Trommelwelle angeordnet sind. Dadurch trifft die druckfrische Bogenunterseite während des Bogentransportes partiell auf eine Vielzahl nachgiebiger Borsten, die den Bogen tragen. Der auf schweren Tragscheiben angeordnete Bürstenkranz besitzt ein großes Massenträgheitsmoment, so daß zwischen den Bürstenkränzen und den Bogen Relativbewegungen auftreten können. Diese entstehen besonders auf mit entsprechenden Bürstenkränzen versehenen Bogenauslegetrommeln, weil bei Übergang des Kettengreifers von der Kreisbahn des Umlenkkettenrades in die gerade Kettenbahn den transportierten Bogen eine von der Oberflächengeschwindigkeit der Bogenführungstrommel geringfügig unterschiedliche Geschwindigkeit aufgezwungen wird. Durch die Relativbewegung zwischen Bogen und Bürstenkränzen ist ein Verschmieren und Verkratzen des Druckbildes durch die Borsten nicht völlig vermeidbar.US Pat. No. 3,054,348 describes a sheet guide drum, the surface of which is formed by a plurality of brush rings which are arranged next to one another and spaced apart on the drum axis and which have the drum diameter. The brush rings are attached to disks that are arranged on the drum shaft. As a result, the freshly printed underside of the sheet partially encounters a large number of flexible bristles that carry the sheet during sheet transport. The brush ring arranged on heavy supporting disks has a large moment of inertia, so that relative movements can occur between the brush ring and the bow. These arise particularly on sheet-laying drums provided with corresponding brush rings, because when the chain gripper passes from the circular path of the deflection sprocket into the straight chain path, the transported sheets are forced to have a speed slightly different from the surface speed of the sheet-guiding drum. Through the relative movement between the arch and the brush wreaths, smearing and scratching of the printed image by the bristles cannot be completely avoided.

Aufgabe der Erfindung ist es, bogentragende Bürstenkörper einer Bogenführungstrommel in Rotationsdruckmaschinen zu schaffen, welche keine Relativbewegung gegenüber der frisch bedruckten Seite des Bogens ausführen.The object of the invention is to provide sheet-bearing brush bodies of a sheet guide drum in rotary printing presses which do not move relative to the freshly printed side of the sheet.

Gelöst wird die Aufgabe durch die im Kennzeichen des Patentanspruches 1 aufgeführten Merkmale. Weiterbildungen ergeben sich aus dem Unteranspruch.The object is achieved by the features listed in the characterizing part of patent claim 1. Further developments result from the subclaim.

Der Vorteil der Erfindung besteht darin, daß mit der leichten Drehbarkeit der ein geringes Massenträgheitsmoment aufweisenden Rundbürsten keine Relativbewegungen zwischen den Rundbürsten und den Bogen auftreten können. Die Borsten bilden somit nachgiebige Tragpunkte, ohne daß ein Verschmieren oder Verkratzen des Druckbildes möglich ist, auch bei als Kettenumlenktrommeln ausgebildeten Bogenführungstrommeln.The advantage of the invention is that with the easy rotatability of the round brushes, which have a low moment of inertia, no relative movements between the round brushes and the bends can occur. The bristles thus form flexible support points without smearing or scratching of the printed image being possible, even in the case of sheet guide drums designed as chain deflecting drums.

Anhand einer Zeichnung wird die Erfindung in einem Ausführungsbeispiel kurz erläutert.The invention is briefly explained in an exemplary embodiment with reference to a drawing.

Es zeigt:

  • Fig. 1 einen Querschnitt durch eine Bogenführungstrommel bei Übernahme des Bogens vom Druckzylinder, teilweise schematisch,
  • Fig. 2 einen Längsschnitt A-B nach Fig. 1, wobei nur die in der Zeichnungsebene liegenden Rundbürsten dargestellt sind.
It shows:
  • 1 shows a cross section through a sheet guide drum when the sheet is taken over from the impression cylinder, partly schematically,
  • Fig. 2 shows a longitudinal section AB of FIG. 1, only the round brushes lying in the plane of the drawing are shown.

Die in Fig. 1 und Fig. 2 dargestellte Bogenführungstrommel 1 hat gerade durch die Greifersysteme 2 einen frisch bedruckten Bogen 3 von einem vorgeordneten Druckzylinder 4 übernommen und transportiert ihn in das nachfolgende Druckwerk oder zu einer nicht dargestellten Bogenauslegestation. Die Bogenführungstrommel 1 weist zwei kreissektorförmige Endscheiben 5, 6 auf, welche fest auf der Trommelwelle 7 sitzen. In einander gegenüberliegenden Bohrungen 8, 9, die am Umfang in der Nähe der Peripherie der Endscheiben 5, 6 vorgesehen sind, stecken die Enden von zur Trommelwelle 7 vorzugsweise parallel angeordneten rotationssymetrischen Stäben 10. Auf den Stäben 10 sind dicht nebeneinander leicht drehbar eine Vielzahl von kleinen Rundbürsten 11 über die Breite des maximalen Formates des Bogens 3 lückenlos angeordnet.The sheet guide drum 1 shown in FIGS. 1 and 2 has just taken over a freshly printed sheet 3 from an upstream printing cylinder 4 by the gripper systems 2 and transports it into the subsequent printing unit or to a sheet delivery station, not shown. The sheet guide drum 1 has two circular sector end disks 5, 6, which are firmly seated on the drum shaft 7. In opposite bores 8, 9, which are provided on the circumference in the vicinity of the periphery of the end disks 5, 6, the ends of rotationally symmetrical rods 10, which are preferably arranged parallel to the drum shaft 7, are inserted small round brushes 11 arranged across the width of the maximum format of the sheet 3 without gaps.

Die Borsten 12 der Rundbürsten 11 bestehen vorzugsweise aus einem farbabweisenden Material, z.B. aus Nylon, Polyester oder dgl. mit einer geeigneten Steifigkeit.The bristles 12 of the round brushes 11 are preferably made of a color-repellent material, e.g. made of nylon, polyester or the like with a suitable rigidity.

Der Bürstenkörper der Rundbürsten 11 ist vorzugsweise zylindrisch ausgebildet. Es sind aber auch andere Außenkonturen der Borsten 12, z.B. eine ballige Ausführung oder ggf. auch gegenüber dem Bürstenkörper schräggestellte Borsten 12 denkbar.The brush body of the round brushes 11 is preferably cylindrical. However, there are also other outer contours of the bristles 12, e.g. a spherical design or possibly also bristles 12 inclined relative to the brush body are conceivable.

Die Säuberung der Borsten 12 ist sehr leicht vorzunehmen, z.B. durch trocknes Abreiben oder durch Naßwaschen mittels der üblichen Waschmittel, aber erst nach längerer Nutzungsdauer erforderlich.The bristles 12 can be cleaned very easily, e.g. by dry rubbing or by wet washing using the usual detergents, but only after a long period of use.

Auch können die Stäbe 10 in bekannter Weise axial federnd gelagert werden, so daß sie leicht komplett austauschbar sind, was in der Zeichnung nicht dargestellt ist.The rods 10 can also be axially resiliently mounted in a known manner, so that they are easily completely interchangeable, which is not shown in the drawing.

BezugszeichenlisteReference symbol list

11
BogenführungstrommelSheet guide drum
22nd
GreifersystemeGripper systems
33rd
Bogenarc
44th
DruckzylinderPressure cylinder
55
EndscheibeEnd plate
66
EndscheibeEnd plate
77
TrommelwelleDrum shaft
88th
Bohrungdrilling
99
Bohrungdrilling
1010th
StäbeRods
1111
RundbürstenRound brushes
1212
BorstenBristles

Claims (2)

  1. Sheet guiding drum in rotary printing press with bars fixed around the periphery of the drum which run parallel to the axis of the drum shaft, characterised in that there are arranged rotatably on the bars (10) closely adjacent one another across the width of the maximum sheet format a plurality of small round brushes (11).
  2. Sheet guiding drum according to Claim 1, characterised in that the bristles (12) of the rotatable round brushes (11) consist of an ink repellent material.
EP90115642A 1989-09-14 1990-08-16 Transfer drum in rotary presses Expired - Lifetime EP0417497B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90115642T ATE91967T1 (en) 1989-09-14 1990-08-16 SHEET GUIDE DRUM IN ROTARY PRESSES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3930747A DE3930747A1 (en) 1989-09-14 1989-09-14 ARCH GUIDE DRUM IN ROTARY PRINTING MACHINES
DE3930747 1989-09-14

Publications (3)

Publication Number Publication Date
EP0417497A2 EP0417497A2 (en) 1991-03-20
EP0417497A3 EP0417497A3 (en) 1991-06-05
EP0417497B1 true EP0417497B1 (en) 1993-07-28

Family

ID=6389443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90115642A Expired - Lifetime EP0417497B1 (en) 1989-09-14 1990-08-16 Transfer drum in rotary presses

Country Status (7)

Country Link
US (1) US5115740A (en)
EP (1) EP0417497B1 (en)
JP (1) JPH03106653A (en)
AT (1) ATE91967T1 (en)
BR (1) BR9004573A (en)
DE (2) DE3930747A1 (en)
ES (1) ES2044348T3 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214604A1 (en) * 1992-05-08 1993-11-11 Roland Man Druckmasch Device for transporting sheets within a printing machine
DE4440325C1 (en) * 1994-11-11 1996-02-01 Roland Man Druckmasch Cleaning mechanism for sheet conveyor on rotary printer
DE19516066C2 (en) * 1995-05-04 1999-09-09 Heidelberger Druckmasch Ag Sheet-guiding drum, in particular delivery drum, of a sheet-fed rotary printing machine
US5818208A (en) * 1996-12-19 1998-10-06 Abb Power T&D Company Inc. Flicker controllers using voltage source converters
US5842412A (en) * 1997-03-07 1998-12-01 Bba Nonwovens Simpsonville, Inc. Anti-marking covering for printing press transfer cylinder
DE19719624C1 (en) * 1997-05-09 1998-06-10 Heidelberger Druckmasch Ag Sheet-fed rotary press with printing-varnish units
US6684774B2 (en) 1997-05-09 2004-02-03 Heidelberger Druckmaschinen Ag Sheet-fed rotary printing press
DE19745763A1 (en) * 1997-10-16 1999-04-22 Heidelberger Druckmasch Ag Transport drum in rotary printing machines
US6666449B2 (en) 2001-05-15 2003-12-23 Defosse Stephen Francis Star wheel surface enhancement and process of manufacture

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US599044A (en) * 1898-02-15 Ernest pain
US1086120A (en) * 1911-05-22 1914-02-03 American Multigraph Co Feeding-roller.
US3054348A (en) * 1959-08-19 1962-09-18 Edgar C Gutweniger Skeleton roll printing press
CH392564A (en) * 1961-09-26 1965-05-31 Color Metal Ag Transfer drum for rotary printing machines
US3308522A (en) * 1962-12-14 1967-03-14 Velcro Corp Anti-offset roll
DE1179559B (en) * 1963-06-05 1964-10-15 Roland Offsetmaschf Boom drum
US3334892A (en) * 1965-08-04 1967-08-08 Adamovske Strojirny Np Drum for delivering paper sheets from machines
US3642274A (en) * 1970-08-07 1972-02-15 Francis Walter Herrington Sheet-supporting assembly for an inverter roll
DE2550721C3 (en) * 1975-11-12 1986-07-31 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Transfer drum on a printing machine
DE3614565A1 (en) * 1986-04-29 1987-11-05 Roland Man Druckmasch REVERSE DRUM IN ARC ROTATION PRINTING MACHINES
US4858910A (en) * 1987-01-22 1989-08-22 M.A.N. Roland Druckmaschinen Conveyor for a sheet-fed rotary press

Also Published As

Publication number Publication date
ES2044348T3 (en) 1994-01-01
US5115740A (en) 1992-05-26
DE3930747A1 (en) 1991-03-28
EP0417497A3 (en) 1991-06-05
DE3930747C2 (en) 1991-07-11
JPH03106653A (en) 1991-05-07
EP0417497A2 (en) 1991-03-20
BR9004573A (en) 1991-09-10
DE59002089D1 (en) 1993-09-02
ATE91967T1 (en) 1993-08-15

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