EP0490087B1 - Device for smoothing the sheets on the impression cylinder of a sheet-fed rotary printing machine - Google Patents
Device for smoothing the sheets on the impression cylinder of a sheet-fed rotary printing machine Download PDFInfo
- Publication number
- EP0490087B1 EP0490087B1 EP91119118A EP91119118A EP0490087B1 EP 0490087 B1 EP0490087 B1 EP 0490087B1 EP 91119118 A EP91119118 A EP 91119118A EP 91119118 A EP91119118 A EP 91119118A EP 0490087 B1 EP0490087 B1 EP 0490087B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- impression cylinder
- nozzle
- running direction
- lance 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
Links
Images
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
- B41F25/00—Devices for pressing sheets or webs against cylinders, e.g. for smoothing purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
Definitions
- the invention relates to a device for smoothing sheets on the printing cylinder in a sheet-fed printing press.
- a device is described in the main patent, in which a blowing nozzle which moves and acts upon the machine in the work cycle ensures that the printing sheet is securely and properly placed on the printing cylinder before it enters the machine the printing gap and greater security for duplication-free and smear-free printing is also sought at high printing speeds.
- a sword nozzle which extends over a substantial part of the width, preferably over the entire width of the printing cylinder, is particularly suitable for this purpose. This has a non-contact effect on the printing sheet for the purpose of achieving a secure and smooth contact with the printing cylinder before it enters the printing nip.
- the object of the invention is a further improvement with the same objective as in the patent DE-A-3 920 730 (see EP-A-0 405 166) (prior art make Article 54 (3) EPC), regardless of the type of paper, to reach.
- the air flow emerging from the blowing nozzle leads in the middle of the sheet against the running direction of the sheet, so that a smoothing movement by the air flow not only in the direction from the sheet leading edge to the trailing edge of the sheet, but also from the center to both sides.
- blowing air emerging from the blow nozzle first reaches the sheet at its front edge and then smoothes the sheet to the sheet rear edge and on both sides.
- a blowing nozzle in the form of an arrow is provided, in which the tip is directed against the running direction of the sheet.
- the printing sheet 1 taken over from a preceding printing unit is transferred from a transfer drum 2 to the printing cylinder 3 of a subsequent printing unit.
- the sheet grippers 4 grasp the printing sheet 1 at the tangent point between the transfer drum 2 and the printing cylinder 3 and pull the printing sheet 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 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 nip 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 swings back and forth in the machine's work cycle, swinging in the running direction of the sheet.
- the blowing nozzle 8 is designed as a sword nozzle, or as a sword consisting of many individual nozzles or openings, so that their nozzle opening extends over a substantial part of the width of the printing cylinder 3, advantageously over its entire width.
- the angular range in which the blowing nozzle 8 swings is adjustable, in such a way that both the angle of attack of the blowing direction with respect to the normal through the pendulum axis 9 on the circumference of the pressure cylinder 3 and the pivoting angle can be adjusted.
- each nozzle can advantageously be regulated individually.
- the sword nozzle is attached to a tube 11 so that it can be adjusted in the circumferential direction.
- the tube 11 is mounted so that it can swing about its longitudinal axis in the frame 12 of the machine.
- a lever mechanism 13 is suitable for driving the pendulum movement.
- the sword nozzle 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.
- the air control for the sword nozzle takes place through the overlap of radial openings in the tube 11 with the inner end of the connection 19 or the passage in the housing 17 to the sword nozzle.
- Settings, controls and effects correspond to the representation in the main patent.
- the sword nozzle has an arrow shape directed with the tip against the running direction of the bow 1, as is shown in FIG. 3, which shows a plan view of the arrow shape of the sword nozzle.
- curved-shaped sword nozzles can also be used in order to first blow air into the sheet to be printed in the middle of the sheet from the leading edge to the trailing edge of the sheet before entering the printing nip, in order to move the sheet from the leading edge to the trailing edge and at the same time from smooth the center outwards so that a safe and full contact of the sheet to be printed on the impression cylinder is achieved by this contactless action.
Landscapes
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Rotary Presses (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Bogenglättung am Druckzylinder in einer Bogendruckmaschine nach dem Oberbegriff des Patentanspruches 1.The invention relates to a device for smoothing sheets on the printing cylinder in a sheet-fed printing press.
Ausgehend von einem Stand der Technik nach der EP-A-0 306 684 wird in dem Hauptpatent eine Vorrichtung beschrieben, bei der durch eine im Arbeitstakt der Maschine schwingend bewegte und beaufschlagte Blasdüse ein sicheres und sattes Auflegen des Druckbogens auf dem Druckzylinder vor dem Einlauf in den Druckspalt und eine größere Sicherheit für einen dublierfreien und abschmierfreien Druck auch bei hohen Druckgeschwindigkeiten angestrebt wird. Dazu ist eine Schwertdüse besonders geeignet, die sich über einen wesentlichen Teil der Breite, vorzugsweise über die gesamte Breite des Druckzylinders, erstreckt. Dadurch erfolgt eine berührungslose Einwirkung auf den Druckbogen zum Zwecke der Erzielung einer sicheren und glatten Anlage am Druckzylinder vor dem Einlauf in den Druckspalt.Starting from a state of the art according to EP-A-0 306 684, a device is described in the main patent, in which a blowing nozzle which moves and acts upon the machine in the work cycle ensures that the printing sheet is securely and properly placed on the printing cylinder before it enters the machine the printing gap and greater security for duplication-free and smear-free printing is also sought at high printing speeds. A sword nozzle which extends over a substantial part of the width, preferably over the entire width of the printing cylinder, is particularly suitable for this purpose. This has a non-contact effect on the printing sheet for the purpose of achieving a secure and smooth contact with the printing cylinder before it enters the printing nip.
Aufgabe der Erfindung ist, eine weitere Verbesserung mit der gleichen Zielsetzung wie im Patent DE-A-3 920 730 (Siehe EP-A-0 405 166) (Stand der Technik mach Antikel 54(3) EPÜ), unabhängig von der Papiersorte, zu erreichen.The object of the invention is a further improvement with the same objective as in the patent DE-A-3 920 730 (see EP-A-0 405 166) (prior art make Article 54 (3) EPC), regardless of the type of paper, to reach.
Dazu ist in weiterer Ausgestaltung der Anordnung nach dem Hauptpatent eine Ausbildung mit Merkmalen nach dem Kennzeichen des Patentanspruches 1 vorgesehen.For this purpose, in a further embodiment of the arrangement according to the main patent, training with features according to the characterizing part of
Durch diese Ausbildungsmerkmale eilt der aus der Blasdüse austretende Luftstrom in der Bogenmitte entgegen der Laufrichtung des Bogens vor, so daß eine Glättbewegung durch den Luftstrom nicht nur in Richtung von der Bogenvorderkante zur Bogenhinterkante, sondern auch von der Mitte nach beiden Seiten erfolgt.By means of these design features, the air flow emerging from the blowing nozzle leads in the middle of the sheet against the running direction of the sheet, so that a smoothing movement by the air flow not only in the direction from the sheet leading edge to the trailing edge of the sheet, but also from the center to both sides.
Diese Wirkung kann durch eine gebogen geformte Blasdüse erreicht werden, so daß die aus der Blasdüse austretende Blasluft den Bogen an seiner Vorderkante zuerst erreicht und den Bogen dann zur Bogenhinterkante und nach beiden Seiten glättet. Bei einer bevorzugten Ausführung ist eine Blasdüse in Pfeilform vorgesehen, bei der die Spitze gegen die Laufrichtung des Bogens gerichtet ist.This effect can be achieved by means of a curved blow nozzle, so that the blowing air emerging from the blow nozzle first reaches the sheet at its front edge and then smoothes the sheet to the sheet rear edge and on both sides. In a preferred embodiment, a blowing nozzle in the form of an arrow is provided, in which the tip is directed against the running direction of the sheet.
Die Erfindung wird anhand eines auf der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:
Figur 1- eine Seitenansicht eines Druckwerks einer Bogenrotationsoffsetdruckmaschine,
Figur 2- eine im Maßstab gegenüber der
Figur 1 vergrößerte Ansicht der Glattstreichdüse in Laufrichtung des Druckbogens gesehen und Figur 3- einen Schnitt nach der Linie III - III der
Figur 2.
- Figure 1
- a side view of a printing unit of a sheet-fed rotary offset printing machine,
- Figure 2
- seen a scale enlarged view of Figure 1 of the smoothing nozzle in the direction of the sheet and
- Figure 3
- a section along the line III - III of Figure 2.
In Übereinstimmung mit der Anordnung nach dem Hauptpatent wird der von einem vorausgehenden Druckwerk übernommene Druckbogen 1 von einer Überführungstrommel 2 dem Druckzylinder 3 eines nachfolgenden Druckwerks übergeben. Die Bogengreifer 4 erfassen den Druckbogen 1 im Tangentenpunkt zwischen der Überführungstrommel 2 und dem Druckzylinder 3 und ziehen den Druckbogen durch den Druckspalt 5 zwischen dem Druckzylinder 3 und dem Gummituchzylinder 6. Hinter dem Druckspalt 5 wird der Druckbogen 1 einer weiteren Überführungstrommel 7 zugeführt, die den Druckbogen 1 an ein weiteres Druckwerk übergibt.In accordance with the arrangement according to the main patent, the
Zur Erzielung einer sicheren und satten Anlage des Druckbogens 1 am Umfang des Druckzylinders 3 ist mit einem gewissen Abstand vor dem Druckspalt 5 eine Blasdüse 8 gegen den Umfang des Druckzylinders 3 gerichtet und um eine Pendelachse 9 pendelbar gelagert sowie mit einem Antrieb kuppelbar, der die Blasdüse 8 im Arbeitstakt der Maschine schwingend in Laufrichtung des Bogens vor- und zurückbewegt. Die Blasdüse 8 ist als Schwertdüse ausgebildet, oder als Schwert bestehend aus vielen Einzeldüsen bzw. öffnungen, so daß sich deren Düsenöffnung über einen wesentlichen Teil der Breite des Druckzylinders 3, vorteilhaft über dessen gesamte Breite, erstreckt. Der Winkelbereich, in dem sich die Blasdüse 8 schwingend bewegt, ist einstellbar, und zwar so, daß sowohl der Anstellwinkel der Blasrichtung gegenüber der Normalen durch die Pendelachse 9 auf den Umfang des Druckzylinders 3 als auch der Schwenkwinkel einstellbar sind.To achieve a secure and full contact of the
Im Falle, daß die Schwertdüse aus lauter Einzeldüsen besteht, kann in vorteilhafterweise jede Düse für sich geregelt werden. Bei dem Ausführungsbeispiel ist die Schwertdüse an einem Rohr 11 in dessen Umfangsrichtung verstellbar befestigt. Das Rohr 11 ist um seine Längsachse schwingend pendelbar in dem Gestell 12 der Maschine gelagert. Für den Antrieb der Pendelbewegung ist ein Hebelgetriebe 13 beispielsweise geeignet. Die Schwertdüse ist mit einem rohrförmigen Gehäuse 17 auf dem Mantel eines Ventilstellringes 14 aufgeschoben, der gegenüber einem Gestellteil 15 mittels einer Schraube 16 einstellbar ist. Der Ventilstellring 14 ist durch einen Mitnehmer 18 seitlich geführt. Ein radial gerichteter Anschluß 19 für die auf der Zeichnung nicht dargestellte Luftleitung durchgreift das Gehäuse 17 und ist mit dem inneren Ende in dem Ventilstellring 14 befestigt. Die Luftsteuerung für die Schwertdüse erfolgt durch die überdeckung radialer öffnungen im Rohr 11 mit dem inneren Ende des Anschlusses 19 bzw. des Durchganges in dem Gehäuse 17 zu der Schwertdüse. Einstellungen, Steuerungen und Wirkungen entsprechen der Darstellung in dem Hauptpatent. Die Schwertdüse weist bei dem Ausführungsbeispiel eine mit der Spitze gegen die Laufrichtung des Bogens 1 gerichtete Pfeilform auf, wie es in der Figur 3 dargestellt ist, die eine Draufsicht auf die Pfeilform der Schwertdüse zeigt. Anstelle einer solchen Pfeilform können auch gebogen geformte Schwertdüsen zur Anwendung kommen, um den zu bedruckenden Bogen vor dem Einlauf in den Druckspalt zunächst in der Bogenmitte von der Bogenvorderkante zur Bogenhinterkante hin mit Blasluft zu beaufschlagen, um den Bogen von der Vorderkante zur Hinterkante und gleichzeitig von der Mitte nach außen zu glätten, so daß durch diese berührungslose Einwirkung eine sichere und satte Anlage des zu bedruckenden Bogens am Druckzylinder erreicht wird.In the event that the sword nozzle consists of nothing but individual nozzles, each nozzle can advantageously be regulated individually. In the exemplary embodiment, the sword nozzle is attached to a
- 11
- DruckbogenPrinted sheet
- 22nd
- ÜberführungstrommelTransfer drum
- 33rd
- DruckzylinderImpression cylinder
- 44th
- BogengreiferBow grab
- 55
- DruckspaltPressure gap
- 66
- GummituchzylinderBlanket cylinder
- 77
- ÜberführungstrommelTransfer drum
- 88th
- BlasdüseBlow nozzle
- 99
- PendelachseSwing axle
- 1010th
- 1111
- Rohrpipe
- 1212th
- Gestell der MaschineFrame of the machine
- 1313
- HebelgetriebeLever gear
- 1414
- VentilstellringValve collar
- 1515
- GestellteilFrame part
- 1616
- Schraubescrew
- 1717th
- Gehäusecasing
- 1818th
- MitnehmerCarrier
- 1919th
- Anschluß für LuftConnection for air
Claims (4)
- Device for the smooth placing of sheets (1) on the impression cylinder (3) ahead of the printing gap (5) of a sheet-fed rotary offset printing machine, in which device at least one blower nozzle (8), which can be directed towards the circumference of the impression cylinder (3) and extends over a substantial part of the width of the impression cylinder (3), is mounted with spacing ahead of the printing gap (5) so as to oscillate about an axis of oscillation (9) lying parallel to the axis of the impression cylinder (3) for pressing the sheet (1) on by the dynamic effect of flowing air and can be coupled to a drive which moves the blower nozzle (8) back and forth in phase with the machine, oscillating in the running direction of the sheet (1), the ends of the blower nozzle (8) being offset relative to a central region in the running direction of the sheet (1) and causing a centrally leading smoothing of the sheet (1) to take place from the leading edge to the trailing edge of the sheet and from the centre of the sheet to the two outsides.
- Device according to Claim 1, characterised in that the blower nozzle (8) is provided as a lance nozzle which is bent in shape.
- Device according to Claim 1, characterised in that the lance nozzle has an arrow-type shape with the tip directed counter to the running direction of the sheet (1).
- Device according to Claims 1 to 3, characterised in that the lance nozzle consists of individual, separately controllable nozzles.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19904039311 DE4039311A1 (en) | 1989-06-24 | 1990-12-10 | System for smoothing sheet against printing press cylinder - uses air nozzle with ends offset from middle part |
DE4039311 | 1990-12-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0490087A1 EP0490087A1 (en) | 1992-06-17 |
EP0490087B1 true EP0490087B1 (en) | 1994-11-02 |
Family
ID=6419944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91119118A Expired - Lifetime EP0490087B1 (en) | 1990-12-10 | 1991-11-11 | Device for smoothing the sheets on the impression cylinder of a sheet-fed rotary printing machine |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0490087B1 (en) |
JP (1) | JPH04275150A (en) |
CN (1) | CN1022554C (en) |
AT (1) | ATE113533T1 (en) |
CA (1) | CA2055586C (en) |
DE (1) | DE59103420D1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19523076C5 (en) * | 1995-06-24 | 2007-05-16 | Heidelberger Druckmasch Ag | Device for achieving a perfect support of a printing substrate in a printing press |
DE19753137C1 (en) * | 1997-11-29 | 1998-10-15 | Roland Man Druckmasch | Sheet-guide and handler for printing machine |
DE10000308A1 (en) * | 2000-01-05 | 2001-07-12 | Heidelberger Druckmasch Ag | Air duct system in a sheet-fed press |
JP2008156123A (en) * | 2006-12-21 | 2008-07-10 | Heidelberger Druckmas Ag | Device for feeding sheet toward machine for processing sheet |
CN106629193B (en) * | 2016-11-18 | 2018-01-23 | 无锡祁龙胶粘制品有限公司 | A kind of diaphragm winding flattening device |
CN114103429A (en) * | 2020-08-26 | 2022-03-01 | 北京华夏视科技术股份有限公司 | Paper flattening mechanism of printing machine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3650043A (en) * | 1970-04-03 | 1972-03-21 | Overly Inc | Web stabilizer |
DE2603483B2 (en) * | 1976-01-30 | 1978-06-08 | Reinhard Mohn Ohg, 4830 Guetersloh | Method for guiding a sheet for simultaneous printing with a perfecting printing and device for carrying out the method |
JPS55102373A (en) * | 1979-02-01 | 1980-08-05 | Nippon Carbide Ind Co Ltd | Preparation of artificial fish egg |
DD241397A1 (en) * | 1985-09-30 | 1986-12-10 | Polygraph Leipzig | BLADE DEVICE IN PRINTING MACHINES |
JP2628647B2 (en) * | 1987-06-08 | 1997-07-09 | デュプロ精工株式会社 | Stencil locking device for stencil printing machine |
EP0306684B1 (en) * | 1987-09-11 | 1992-04-08 | M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft | Device for pressing a sheet against the impression cylinder in a rotary sheet-fed printing press for multicolour printing |
DD264651B5 (en) * | 1987-10-29 | 1993-11-04 | Kba Planeta Ag | DEVICE FOR LUBRICATING BOW GUIDANCE |
DE3920730A1 (en) * | 1989-06-24 | 1991-01-10 | Heidelberger Druckmasch Ag | DEVICE FOR ARC SMOOTHING ON THE PRINT CYLINDER IN AN ARC ROTATION PRINTING MACHINE |
-
1991
- 1991-11-11 EP EP91119118A patent/EP0490087B1/en not_active Expired - Lifetime
- 1991-11-11 AT AT91119118T patent/ATE113533T1/en not_active IP Right Cessation
- 1991-11-11 DE DE59103420T patent/DE59103420D1/en not_active Expired - Fee Related
- 1991-11-14 CA CA002055586A patent/CA2055586C/en not_active Expired - Fee Related
- 1991-12-09 JP JP3324140A patent/JPH04275150A/en active Pending
- 1991-12-10 CN CN91111504A patent/CN1022554C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ATE113533T1 (en) | 1994-11-15 |
DE59103420D1 (en) | 1994-12-08 |
JPH04275150A (en) | 1992-09-30 |
EP0490087A1 (en) | 1992-06-17 |
CN1062318A (en) | 1992-07-01 |
CA2055586C (en) | 1995-01-03 |
CN1022554C (en) | 1993-10-27 |
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