EP0755887B1 - Method and device for pneumatically slowing down sheets in the delivery device of a rotary sheet printing machine - Google Patents
Method and device for pneumatically slowing down sheets in the delivery device of a rotary sheet printing machine Download PDFInfo
- Publication number
- EP0755887B1 EP0755887B1 EP96110376A EP96110376A EP0755887B1 EP 0755887 B1 EP0755887 B1 EP 0755887B1 EP 96110376 A EP96110376 A EP 96110376A EP 96110376 A EP96110376 A EP 96110376A EP 0755887 B1 EP0755887 B1 EP 0755887B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- braking
- blowing
- air
- directed
- 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
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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
- B65H29/68—Reducing the speed of articles as they advance
- B65H29/686—Pneumatic brakes
-
- 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 method and to a Device for pneumatic sheet braking in the delivery a sheet-fed rotary printing press using blowing air, which the Sheet transport direction is opposite.
- the bow comes up full width with the blow bar completely, or in individual zones, rubbing against each other, so that especially in the Fine and reverse printing slight smearing arise.
- the blow bar closes against the A baffle bent downward in the shape of a horn with tongues cut free.
- the blow out of the Blowing bar directed under the bow blowing air overflows the curved surface and hugs the arch by negative pressure to the lead tongues.
- the invention has for its object a solution for a contactless braking an arc carried on the braking path by a stream of air in the boom one Sheet-fed rotary printing press for high-quality printed products Lubrication phenomena, especially in the perfect and reverse printing, when braking the sheet to avoid.
- a Device provided in which one against the Directional blowing nozzles having sheet transport direction Blow nozzle bar at least on its rear edge rounded cross-sectional profile and blow nozzles still in the area this has roundings. It is through these training characteristics a vacuum under the arch and thus one Avoid sucking the bow.
- Floating between the bow to the braking distance transporting blowing device and a blowing device for braking the bow by opposing it directed blowing air is a channel for discharging the opposed air flows arranged.
- the air volume and the air pressure can be adjustable. Further Control options result from adjustable Blow nozzles with adjustable throttle and in the direction adjustable nozzle openings.
- the drawing shows schematic representations of Explanation of the method according to the invention and Design of a device for the exercise of such Process.
- FIG. 1 shows a sheet delivery with the sheet gripper 1 one arranged on rotating conveyor chains 2 Gripper system 3 the sheet 4 each at its in Detect the transport direction of the front edge and the last one Printing unit of a sheet-fed rotary printing press for Guide delivery pile 5.
- the deceleration begins at high speed incoming sheet 4. over an over the sheet width extending blow nozzle bar 6 with a rounded cross-section Top and arranged on their top blowing nozzles directed against the transport direction of the sheet 4 Blown air among those by the bow gripper 1 Gripper systems 3 blown released blows.
- Figure 2 shows a graph the formation of the shear stresses Speed distribution in the direction of sheet transport opposing airflow, the arc non-contact at a transport level with a distance above the leadership levels determined by mechanical installations is worn without contact. Which is in the airflow shear stresses act on the kinetic energy of the arch so that the arch is continuous is braked. It makes sense not to get the bow up to Decelerate standstill, but only up to one Remaining speed, which is still a good sheet deposit on the Delivery pile enabled.
- FIGs in Figures 3 and 4 show the training a braking distance for the bow following one non-contact sheet guidance through blown air directed towards the sheet transport is blown under sheet 4.
- the two colliding air flows one of which is to Sheet conveying directed in the transport direction of the sheet and one for braking the bow against the Sheet conveying direction is directed via a channel 8 derived below and, if necessary, via the regulatory body 7 blown again as brake air under sheet 4.
- schematically 4 is the outflow direction of the blow nozzles in the Blow bar 6 in two alternative embodiments shown.
- FIG. 5 An embodiment for the design of the Blow nozzle bar 6 is shown in Figures 5 and 6.
- the Cross section in Figure 5 shows a formed from sheet metal Blow nozzle bar 6 with a connecting piece 10 for the Blowing air.
- In the transport direction of the sheet 4 is both Front edge as well as the rear edge of the blow nozzle bar 6 rounded.
- the air blows against the direction of conveyance of the sheet 4 by blowing nozzles 9, which by tongue-shaped Incisions 11 on the top of the blow nozzle bar 6 are formed.
- Such incisions 11 are also in Area of the rounding of the blow nozzle bar 6 to this Assign the formation of a vacuum under the sheet 4 avoid.
- a sheet guide 12 the Trailing edge of the sheet 4 on the main stack 5 in the delivery.
- FIG. 7 The principle of operation of the inventive method for Bow braking by blowing air is shown in FIG. 7 illustrated.
- Gripper system 3 is held at its leading edge sheet 4 in the area of the braking section against the direction of transport of the arc blowing air from the blowing nozzles 9 of the blowing nozzle bar 6 blown, thereby tightening and stretching the bow 4 he follows.
- 4 shear stresses form under the arch according to the representation in Figure 2, by the a braking of the sheet 4 after its release by the Gripper system takes place.
- the sheet 4 is transported contact-free on the air flow to slow down the Sheet 4.
- the sheet is transported before the braking section an air flow which is in the conveying direction of the sheet is directed.
- This air flow carrying the bow 4 and the air flow directed towards it for pneumatic Sheet braking are immediately before the braking distance for the Sheet 4 derived downwards.
- the possible repatriation of the derived air flow was explained for Figure 3.
- FIG. 8 illustrates the scaled Sheet transport to delivery pile 5. While the rear one is still End of a sheet 4 already released by the gripper system 3 the shear stresses caused by surface friction Brake air is exposed, a subsequent sheet 4 is still held by the gripper system 3 and in the direction of conveyance directed airflow carried. Only when the back end of the former arc 4, the channel 8 for discharging the air Sheet conveying and the brake air to brake the sheet released, also form under the second arch Shear stresses for braking the bow. To this In this way, a completely contact-free curved flaking takes place with the help of the hover guide in front of the braking section, which also saves time for braking the bow is achieved.
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren und auf eine Vorrichtung zum pneumatischen Bogenabbremsen im Ausleger einer Bogenrotationsdruckmaschine mittels Blasluft, die der Bogentransportrichtung entgegengerichtet ist.The invention relates to a method and to a Device for pneumatic sheet braking in the delivery a sheet-fed rotary printing press using blowing air, which the Sheet transport direction is opposite.
Der dem erfindungsgemäßen Verfahren und der zu seiner Ausübung benutzten Vorrichtung nächstliegende Stand der Technik ergibt sich aus der DE-AS 21 35 105. Hieraus ist es bekannt, den ankommenden, an seiner in Transportrichtung vorderen Kante durch Bogengreifer eines an Förderketten umlaufenden Greifersystems gehaltenen Bogen auf ganzer Breite mit Blasluft zu unterblasen, die dem Bogenlauf entgegengerichtet ist, wobei diese Blasluft aus Blasdüsen einer Blasdüsenleiste austritt, die in der Förderstrecke des Bogens unmittelbar vor der vorderen Kante eines Auslegestapels unterhalb der Bewegungsbahn des Bogens angeordnet ist. Durch diese der Bogenbewegung entgegengerichtete Luftströmung entsteht an der in Bogenlaufrichtung hinteren Kante der Blasleiste ein Unterdruck, durch den der Bogen angesaugt und dadurch infolge der entstehenden Reibungskräfte kraftschlüssig abgebremst wird. Der Bogen kommt dabei auf ganzer Breite mit der Blasleiste vollständig, oder in einzelnen Zonen, reibend in Berührung, so daß vor allem im Schön- und Widerdruck leicht Abschmiererscheinungen entstehen. An die Blasleiste schließt sich entgegen der Bogenlaufrichtung ein hornförmig abwärts gebogenes Leitblech mit freigeschnittenen Zungen an. Die aus den Blasdüsen der Blasleiste unter den Bogen gerichtete Blasluft strömt über die gekrümmte Fläche und schmiegt den Bogen durch Unterdruck an die Leitzungen. The method according to the invention and its Exercise device used closest to the state Technology results from DE-AS 21 35 105. From this it is known, the incoming, at its in the direction of transport front edge by a gripper on conveyor chains circulating gripper system held sheets across the entire width to blow with blowing air, which is the sheet run is opposed, this blowing air from blowing nozzles a blow nozzle strip emerges, which in the conveyor line of the Sheet immediately in front of the front edge of a delivery stack is arranged below the path of movement of the arc. Through this air flow directed against the arc movement arises at the rear edge in the direction of sheet travel Blow bar a negative pressure through which the bow is sucked and as a result of the resulting frictional forces is braked non-positively. The bow comes up full width with the blow bar completely, or in individual zones, rubbing against each other, so that especially in the Fine and reverse printing slight smearing arise. The blow bar closes against the A baffle bent downward in the shape of a horn with tongues cut free. The blow out of the Blowing bar directed under the bow blowing air overflows the curved surface and hugs the arch by negative pressure to the lead tongues.
Wirkungsgleiche, aber konstruktiv abweichende Anordnungen sind aus der DE-PS 23 58 206 und aus der DE-OS 27 20 674 bekannt.Arrangements having the same effect but deviating in terms of construction are known from DE-PS 23 58 206 and known from DE-OS 27 20 674.
Bei einem Verfahren und einer Vorrichtung zum schwebenden Führen von Bogen über eine teils gekrümmte Förderstrecke nach der WO 89/09177 ist es vorgesehen, den Bogen mittels eines an seiner Vorderkante angreifenden Zugmittels über eine Schwebeführung zu fördern, die durch ein Luftkissen erzeugt wird. Das Luftkissen wird durch eine sehr große Anzahl von Freistrahlen erzeugt, die in gleichem Maß sowohl in als auch gegen die Bogentransportrichtung gerichtet sind. Ein derartig erzeugtes Luftkissen übt jedoch keine nennenswerte Bremswirkung auf den Bogen aus.In a method and an apparatus for levitating sheets over a partly curved conveyor line according to WO 89/09177, it is provided by means of the sheet to convey a traction device acting on its front edge via a levitation guide, generated by an air cushion. The air cushion is made up of a very large number of Free jets generated to the same degree both in and against the Sheet transport direction are directed. However, an air cushion produced in this way does not exercise significant braking effect on the bow.
Der Erfindung liegt die Aufgabe zugrunde, eine Lösung für ein berührungsfreies Abbremsen eines auf dem Bremsweg von einem Luftstrom getragenen Bogens im Ausleger einer Bogenrotationsdruckmaschine für Druckerzeugnisse hoher Qualität darzustellen, um Abschmiererscheinungen, vor allemim Schön- und Widerdruck, beim Abbremsen des Bogens zu vermeiden.The invention has for its object a solution for a contactless braking an arc carried on the braking path by a stream of air in the boom one Sheet-fed rotary printing press for high-quality printed products Lubrication phenomena, especially in the perfect and reverse printing, when braking the sheet to avoid.
Zur Lösung dieser Aufgabe wird erfindungsgemäß ein Verfahren nach dem Patentanspruch 1
und eine Vorrichtung nach den Ansprüche 4 und 5 vorgeschlagen.According to the invention, a method according to claim 1 is used to achieve this object
and a device according to
In Abweichung von Lösungsversuchen nach dem Stande der Technik beruht die Wirkung des erfindungsgemäßen Verfahrens nicht auf Reibung des abzubremsenden Bogens, sondern auf Schubspannungen in dem den Bogen berührungsfrei tragenden Luftstrom. Die Bremskraft ergibt sich aus dem Produkt der sich an der Grenzfläche im Luftstrom ergebenden Schubspannung und der mit diesem Luftstrom beaufschlagten Fläche. Zur Erzielung dieser Wirkung wird die Luftströmung zwischen einem Leitblech und dem Bogen ausgebildet. Dabei erfolgt eine Umsetzung des Vordruckes der Luftströmung in kinetische Energie und eine gleichmäßige Ausbreitung des Luftstroms zu einer flächendeckenden Filmströmung unter dem Bogen. zum Abbremsen des Bogens vor der eigentlichen Bremss trecke für den Bogen kontrolliert nach unten abgeleitet. Der nach unten abgeleitete Luftstrom kann gegebenenfalls über Regeleinrichtungen zu den Blasdüsen des einen oder des anderen Luftstromes zurückgeführt werden.Deviating from attempted solutions according to the prior art, the effect of The inventive method not on friction of the sheet to be braked, but on Shear stresses in the air flow carrying the bow without contact. The braking force results from the product of the air flow at the interface Shear stress and the area exposed to this air flow. To achieve this Effectively, the air flow is formed between a baffle and the bend. there the pre-pressure of the air flow is converted into kinetic energy and one uniform spreading of the air flow to a full-coverage film flow below the bow. for braking the sheet in front of the actual braking track for the bow is derived downwards in a controlled manner. The after Airflow derived below may be over Control devices for the blow nozzles of one or the other air flow can be returned.
Zur Ausübung des erfindungsgemäßen Verfahrens ist eine Vorrichtung vorgesehen, bei der eine gegen die Bogentransportrichtung gerichtete Blasdüsen aufweisende Blasdüsenleiste wenigstens an ihrer Hinterkante ein abgerundetes Querschnittsprofil und Blasdüsen noch im Bereich dieser Abrundungen aufweist. Es wird durch diese Ausbildungsmerkmale ein Unterdruck unter dem Bogen und damit ein Ansaugen des Bogens vermieden.To carry out the method according to the invention is a Device provided in which one against the Directional blowing nozzles having sheet transport direction Blow nozzle bar at least on its rear edge rounded cross-sectional profile and blow nozzles still in the area this has roundings. It is through these training characteristics a vacuum under the arch and thus one Avoid sucking the bow.
Zwischen der den Bogen schwebend bis zur Bremsstrecke transportierenden Blaseinrichtung und einer Blaseinrichtung für die Abbremsung des Bogens durch entgegengesetzt gerichtete Blasluft ist ein Kanal zur Ableitung der gegeneinander gerichteten Luftströme angeordnet.Floating between the bow to the braking distance transporting blowing device and a blowing device for braking the bow by opposing it directed blowing air is a channel for discharging the opposed air flows arranged.
Zur Regelung des Luftstromes für die Bogenabbremsung können die Luftmenge und der Luftdruck einstellbar sein. Weitere Regelungsmöglichkeiten ergeben sich durch einstellbare Blasdüsen mit regulierbarer Drosselstelle und in der Richtung verstellbaren Düsenöffnungen.To control the air flow for braking the arc the air volume and the air pressure can be adjustable. Further Control options result from adjustable Blow nozzles with adjustable throttle and in the direction adjustable nozzle openings.
Die Zeichnung zeigt schematische Darstellungen zur Erläuterung des erfindungsgemäßen Verfahrens und zur Gestaltung einer Vorrichtung für die Ausübung eines solchen Verfahrens.The drawing shows schematic representations of Explanation of the method according to the invention and Design of a device for the exercise of such Process.
Es zeigen:
- Fig. 1
- eine Seitenansicht einer Bogenauslage mit Auslagestapel,
- Fig. 2,3 + 4
- Schemata für die Luftführung im Bereich der Bremsstrecke für den abzubremsenden Bogen,
- Fig. 5
- einen vertikalen Querschnitt durch die Blasdüsenleiste,
- Fig. 6
- eine Draufsicht auf einen Teilbereich der Blasdüsenleiste,
- Fig. 7
- eine Darstellung des Wirkungsprinzips des erfindungsgemäßen Verfahrens und
- Fig. 8
- eine Darstellung des geschuppten Bogentransports zum Auslegestapel mit pneumatischer Bogenbremsung.
- Fig. 1
- a side view of a sheet delivery with delivery stack,
- Fig. 2,3 + 4
- Schemes for the air flow in the area of the braking section for the sheet to be braked,
- Fig. 5
- a vertical cross section through the blow nozzle bar,
- Fig. 6
- a plan view of a portion of the blow nozzle bar,
- Fig. 7
- a representation of the principle of action of the method according to the invention and
- Fig. 8
- a representation of the scaled sheet transport to the delivery stack with pneumatic sheet braking.
Die Figur 1 zeigt einen Bogenausleger, bei dem Bogengreifer 1
eines an umlaufend geführten Förderketten 2 angeordneten
Greifersystems 3 den Bogen 4 jeweils an seiner in
Transportrichtung vorderen Kante erfassen und vom letzten
Druckwerk einer Bogenrotationsdruckmaschine zum
Auslegestapel 5 führen. Unmittelbar vor dem Auslegestapel 5
beginnt die Abbremsung des mit hoher Geschwindigkeit
ankommenden Bogens 4. über eine sich über die Bogenbreite
erstreckende Blasdüsenleiste 6 mit im Querschnitt gerundeter
Oberseite und an ihrer Oberseite angeordneten Blasdüsen wird
entgegen der Transportrichtung des Bogens 4 gerichtete
Blasluft unter den durch die Bogengreifer 1 der
Greifersysteme 3 freigegebenen Bogen geblasen. Die Menge und
der Druck dieser Blasluft werden auf einen
Gleichgewichtszustand mit der vom ankommenden Bogen
ausgehenden kinetischen Energie eingestellt, so daß der
Bogen 4 im Bereich des Bremsweges berührungsfrei von diesem
Luftstrom getragen wird. Die Figur 2 zeigt in einem Schaubild
die Ausbildung der die Schubspannungen hervorrufenden
Geschwindigkeitsverteilung in dem der Bogentransportrichtung
entgegengerichteten Luftstrom, wobei der Bogen berührungsfrei
auf einem Transportniveau mit einem Abstand oberhalb des
durch mechanische Einbauten bestimmten Führungsniveaus
berührungsfrei getragen wird. Die sich in dem Luftstrom
ausbildenden Schubspannungen wirken der kinetischen Energie
des Bogens entgegen, so daß der Bogen kontinuierlich
abgebremst wird. Es ist sinnvoll, den Bogen nicht bis zum
Stillstand abzubremsen, sondern lediglich bis zu einer
Restgeschwindigkeit, die noch eine gute Bogenablage auf dem
Auslegestapel ermöglicht.FIG. 1 shows a sheet delivery with the sheet gripper 1
one arranged on rotating conveyor chains 2
In dem Schaubild der Figur 3 ist dargestellt, daß die zum
Zwecke des Abbremsen des Bogens 4 unter den Bogen geblasene
Bremsluft am Beginn der Bremsstrecke nach unten abgeleitet
und über ein Regelorgan 7 gegebenenfalls erneut als Bremsluft
unter den Bogen geblasen werden kann.In the diagram of Figure 3 it is shown that the for
Purpose of braking the
Die Schaubilder in den Figuren 3 und 4 zeigen die Ausbildung
einer Bremsstrecke für den Bogen im Anschluß an eine
berührungsfreie Bogenführung durch Blasluft, die in Richtung
des Bogentransports unter den Bogen 4 geblasen wird. Bei
einer solchen Anordnung werden die beiden
aufeinandertreffenden Luftströme, von denen einer zur
Bogenförderung in Transportrichtung des Bogens gerichtet und
einer zum Abbremsen des Bogens entgegen der
Bogenförderrichtung gerichtetet ist, über einen Kanal 8 nach
unten abgeleitet und gegebenenfalls über das Regelorgan 7
erneut als Bremsluft unter den Bogen 4 geblasen. Schematisch
ist in der Figur 4 die Ausströmrichtung der Blasdüsen in der
Blasleiste 6 in zwei alternativen Ausführungsformen
dargestellt.The diagrams in Figures 3 and 4 show the training
a braking distance for the bow following one
non-contact sheet guidance through blown air directed towards
the sheet transport is blown under
Ein Ausführungsbeispiel für die konstruktive Gestaltung der
Blasdüsenleiste 6 ist in den Figuren 5 und 6 dargestellt. Der
Querschnitt in Figur 5 zeigt eine aus Blech geformte
Blasdüsenleiste 6 mit einem Anschlußstutzen 10 für die
Blasluft. In Transportrichtung des Bogens 4 ist sowohl die
Vorderkante als auch die Hinterkante der Blasdüsenleiste 6
abgerundet. Die Blasluft tritt entgegen der Förderrichtung
des Bogens 4 durch Blasdüsen 9 aus, die durch zungenförmige
Einschnitte 11 an der Oberseite der Blasdüsenleiste 6
gebildet sind. Solche Einschnitte 11 befinden sich auch im
Bereich der Abrundungen der Blasdüsenleiste 6, um auf diese
Weise die Ausbildung eines Unterdrucks unter dem Bogen 4 zu
vermeiden. An einer Bogenführung 12 senkt sich die
Hinterkante des Bogens 4 auf den Hauptstapel 5 im Ausleger.An embodiment for the design of the
Das Wirkungsprinzip des erfindungsgemäßen Verfahrens zur
Bogenbremsung durch Blasluft wird in der Figur 7
veranschaulicht. Unter den zunächst noch durch das
Greifersystem 3 an seiner Vorderkante gehaltenen Bogen 4 wird
im Bereich der Bremsstrecke entgegen der Transportrichtung
des Bogens Blasluft aus den Blasdüsen 9 der Blasdüsenleiste 6
geblasen, wodurch eine Straffung und Streckung des Bogens 4
erfolgt. Dabei bilden sich unter dem Bogen 4 Schubspannungen
entsprechend der Darstellung in der Figur 2 aus, durch die
eine Abbremsung des Bogens 4 nach seiner Freigabe durch das
Greifersystem erfolgt. Der Transport des Bogens 4 erfolgt
dabei berührungsfrei auf dem Luftstrom zur Abbremsung des
Bogens 4. Bei der Anordnung nach dem Schaubild in Figur 7
erfolgt der Bogentransport bereits vor der Bremsstrecke auf
einem Luftstrom, welcher in Förderrichtung des Bogens
gerichtet ist. Dieser den Bogen 4 tragende Luftstrom und der
ihm entgegengerichtete Luftstrom zur pneumatischen
Bogenbremsung werden unmittelbar vor der Bremsstrecke für den
Bogen 4 nach unten abgeleitet. Die mögliche Rückführung des
abgeleiteten Luftstromes wurde zu Figur 3 erläutert.The principle of operation of the inventive method for
Bow braking by blowing air is shown in FIG. 7
illustrated. Among those initially through that
Das Schaubild in der Figur 8 veranschaulicht den geschuppten
Bogentransport zum Auslegestapel 5. Während noch das hintere
Ende eines bereits vom Greifersystem 3 freigegebenen Bogens 4
den durch Oberflächenreibung bewirkten Schubspannungen der
Bremsluft ausgesetzt ist, wird ein nachfolgender Bogen 4 noch
vom Greifersystem 3 gehalten und von dem in Förderrichtung
gerichteten Luftstrom getragen. Erst wenn das hintere Ende
des ersteren Bogens 4 den Kanal 8 zur Ableitung der Luft zur
Bogenförderung und der Bremsluft zur Abbremsung des Bogens
freigegeben hat, bilden sich auch unter dem zweiten Bogen
Schubspannungen zur Abbremsung des Bogens aus. Auf diese
Weise erfolgt eine vollkommen berührungsfreie Bogenschuppung
mit Hilfe der der Bremsstrecke vorgelagerten Schwebeführung,
durch die auch ein Zeitgewinn für die Abbremsung des Bogens
erreicht wird. The diagram in Figure 8 illustrates the scaled
Sheet transport to
- 11
- Bogengreifersheet grippers
- 22
- Förderkettenconveyor chains
- 33
- Greifersystemgripper system
- 44
- Bogenarc
- 55
- Auslegestapeldelivery pile
- 66
- Blasdüsenleisteblast nozzle
- 77
- Regelorganregulating element
- 88th
- Kanalchannel
- 99
- Blasdüseblow nozzle
- 1010
- AnschlußConnection
- 1111
- Einschnittecuts
- 1212
- Bogenführungbowing
Claims (7)
- Method of braking a sheet in the delivery means of a sheet-fed rotary printing machine by means of a braking arrangement (6) which operates, along a braking section, with blowing-air flow which is directed counter to the sheet-transporting direction, characterized in that, in the region upstream of the braking section of the braking arrangement (6), the sheet (4) is transported on an air stream which is directed in the transporting direction, in that the blowing-air flow which brakes the sheet (4) is directed between the sheet (4) which is to be braked and a top side of the braking arrangement (6) such that the sheet (4) is borne in a contact-free manner by the blowing-air flow in the region of the braking section.
- Method according to Claim 1, characterized in that the air stream which bears the sheet in a contact-free manner over its braking path and an air stream which is directed in the opposite direction, and transports the sheet in a contact-free manner to a delivery stack (5), are discharged downwards in a controlled manner upstream of the braking section of the sheet.
- Method according to Claims 1 and 2, characterized in that the downwardly discharged air stream is guided back to the braking nozzles via a regulating element (7).
- Apparatus for implementing a method according to Claim 1 for braking a sheet in the delivery means of a sheet-fed rotary printing machine by means of a braking arrangement (6) which operates, along a braking section, with blowing-air flow which is directed counter to the sheet-transporting direction, characterized in that a blowing-nozzle bar (6) which is directed counter to the sheet-transporting direction, and has blowing nozzles (9), has a rounded cross-sectional profile at least on its trailing edge, as seen in the running direction of the sheet, and, on its top side, blowing nozzles (9) in the region of the rounded portions.
- Apparatus for implementing a method according to Claim 1 for braking a sheet in the delivery means of a sheet-fed rotary printing machine by means of a braking arrangement (6) which operates, along a braking section, with blowing-air flow which is directed counter to the sheet-transporting direction, characterized in that a channel (8) for discharging the air streams which are directed towards one another beneath the sheet is arranged between a blowing arrangement which transports the sheet in a floating manner and is intended for contact-free transportation to the delivery stack (5) and a blowing arrangement for sheet-braking purposes.
- Apparatus according to Claim 5, characterized in that it is possible to adjust the outlet direction of the blowing nozzles (9) in the blowing-nozzle bar (6).
- Apparatus according to Claim 6, characterized in that located between the blowing nozzles (9) of the blowing-nozzle bar (6), said nozzles being directed counter to the sheet-running direction, are blowing nozzles from which blowing air emerges in the sheet-running direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19527441 | 1995-07-27 | ||
| DE19527441A DE19527441C2 (en) | 1995-07-27 | 1995-07-27 | Method and device for pneumatic sheet braking in the delivery of a sheet-fed rotary printing machine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0755887A2 EP0755887A2 (en) | 1997-01-29 |
| EP0755887A3 EP0755887A3 (en) | 1997-10-15 |
| EP0755887B1 true EP0755887B1 (en) | 2002-01-30 |
Family
ID=7767923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96110376A Expired - Lifetime EP0755887B1 (en) | 1995-07-27 | 1996-06-27 | Method and device for pneumatically slowing down sheets in the delivery device of a rotary sheet printing machine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5718176A (en) |
| EP (1) | EP0755887B1 (en) |
| JP (1) | JP3676503B2 (en) |
| CN (1) | CN1144187A (en) |
| AT (1) | ATE212601T1 (en) |
| CA (1) | CA2180061A1 (en) |
| DE (2) | DE19527441C2 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10129886A (en) * | 1996-10-15 | 1998-05-19 | Heidelberger Druckmas Ag | Sheet paper inserting plate in automatic paper feeder of sheet paper processing machine |
| DE19914177A1 (en) * | 1999-03-29 | 2000-10-05 | Heidelberger Druckmasch Ag | Boom of a sheet-fed printing machine |
| DE10049809B4 (en) * | 1999-10-28 | 2014-02-13 | Heidelberger Druckmaschinen Ag | Guide device for a sheet-like substrate |
| DE10043807B4 (en) * | 1999-12-17 | 2009-05-07 | Heidelberger Druckmaschinen Ag | Boom of a flat printing material processing machine |
| DE10133633A1 (en) * | 2000-08-31 | 2002-03-14 | Heidelberger Druckmasch Ag | System for reducing friction between support and sheets of paper in processing machine comprise compressed air outlets in surface of support, outlets being fitted with throttle system, e.g. spiral air feed |
| US7513499B2 (en) | 2004-05-04 | 2009-04-07 | Heidelberger Druckmaschinen Ag | Sheet brake using a partitioned blower nozzle array |
| US8454665B2 (en) * | 2005-09-16 | 2013-06-04 | Christopher G. Sidebotham | Multi-purpose bone plate system |
| DE102008010985A1 (en) * | 2008-02-25 | 2009-08-27 | Heidelberger Druckmaschinen Ag | Sheet braking mechanism |
| US7913999B2 (en) * | 2008-06-12 | 2011-03-29 | Xerox Corporation | Resilient belt sheet compiler with mixed sheet length mode |
| BR102015024454A2 (en) * | 2014-10-01 | 2016-05-24 | Müller Martini Holding AG | transverse puller brake for printing sheet |
| JP6694255B2 (en) * | 2014-10-01 | 2020-05-13 | ミュラー・マルティニ・ホルディング・アクチエンゲゼルシヤフト | Printing paper brake |
| US10934119B2 (en) | 2018-02-28 | 2021-03-02 | Mueller Martini Holding Ag | Printing sheet brake |
| CN112041175B (en) * | 2018-07-23 | 2022-06-03 | 惠普发展公司，有限责任合伙企业 | Media transport |
| CN111605764B (en) * | 2020-06-04 | 2021-10-29 | 青岛欣欣向荣智能设备有限公司 | Airflow threading packer and packing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3081082A (en) * | 1958-12-15 | 1963-03-12 | Linotype Machinery Ltd | Sheet control for printing machines |
| US3437335A (en) * | 1967-06-16 | 1969-04-08 | Sperry Rand Corp | Fluid document transporter |
| US3503607A (en) * | 1967-12-27 | 1970-03-31 | Sperry Rand Corp | Pneumatic document stacking device |
| DE2135105B1 (en) * | 1971-07-14 | 1972-11-09 | Roland Offsetmaschf | Sheet delivery device on rotary printing machines |
| DE2358206C3 (en) * | 1973-11-22 | 1979-10-04 | Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach | Device on printing machines for transporting sheets |
| JPS5269186A (en) * | 1975-12-08 | 1977-06-08 | Hitachi Ltd | Air conveyor |
| DE2720674A1 (en) * | 1977-05-07 | 1978-11-09 | Maschf Augsburg Nuernberg Ag | Sheet feed for rotary printing press - has gripper system and stop with blower at laying-up point |
| DE3113750A1 (en) * | 1981-04-04 | 1982-10-14 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | "BOW BOOM FOR ROTARY PRINTING MACHINES WITH GRIPPER BRIDGES CIRCULATING ON ENDLESS CHAINS" |
| DD251964A1 (en) * | 1986-08-04 | 1987-12-02 | Polygraph Leipzig | ARC DIRECTION IN PRESSURE MACHINES |
| WO1988004639A1 (en) * | 1986-12-22 | 1988-06-30 | Shimizu Construction Co., Ltd. | Method and apparatus for collecting waste material |
| DE3841909A1 (en) * | 1988-04-02 | 1989-10-19 | Hilmar Vits | METHOD AND DEVICE FOR THE FLOATING GUIDANCE OF ARCHED OR RAIL-SHAPED MATERIAL OVER A CONVEYOR LINE, ESPECIALLY A CURVED CONVEYOR LINE |
-
1995
- 1995-07-27 DE DE19527441A patent/DE19527441C2/en not_active Expired - Fee Related
-
1996
- 1996-06-27 CA CA002180061A patent/CA2180061A1/en not_active Abandoned
- 1996-06-27 EP EP96110376A patent/EP0755887B1/en not_active Expired - Lifetime
- 1996-06-27 DE DE59608664T patent/DE59608664D1/en not_active Expired - Fee Related
- 1996-06-27 AT AT96110376T patent/ATE212601T1/en not_active IP Right Cessation
- 1996-07-19 CN CN96107174A patent/CN1144187A/en active Pending
- 1996-07-19 JP JP19077596A patent/JP3676503B2/en not_active Expired - Fee Related
- 1996-07-29 US US08/681,940 patent/US5718176A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0755887A2 (en) | 1997-01-29 |
| CN1144187A (en) | 1997-03-05 |
| EP0755887A3 (en) | 1997-10-15 |
| JP3676503B2 (en) | 2005-07-27 |
| DE19527441A1 (en) | 1997-02-06 |
| DE59608664D1 (en) | 2002-03-14 |
| DE19527441C2 (en) | 1998-01-29 |
| CA2180061A1 (en) | 1997-01-28 |
| JPH0940260A (en) | 1997-02-10 |
| ATE212601T1 (en) | 2002-02-15 |
| US5718176A (en) | 1998-02-17 |
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