EP0765746B1 - Druckmaschine und Verfahren zum Bogentransport entlang mehrerer Formzylinder - Google Patents
Druckmaschine und Verfahren zum Bogentransport entlang mehrerer Formzylinder Download PDFInfo
- Publication number
- EP0765746B1 EP0765746B1 EP96115358A EP96115358A EP0765746B1 EP 0765746 B1 EP0765746 B1 EP 0765746B1 EP 96115358 A EP96115358 A EP 96115358A EP 96115358 A EP96115358 A EP 96115358A EP 0765746 B1 EP0765746 B1 EP 0765746B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transport band
- printing machine
- ink transfer
- band
- conveyor belt
- 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
- 238000000034 method Methods 0.000 title claims description 6
- 239000000758 substrate Substances 0.000 claims description 7
- 230000036316 preload Effects 0.000 description 7
- 239000000976 ink Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
Definitions
- the invention relates to a printing machine with an endless Conveyor belt and a method for producing Contact forces during a sheet transport along several Forme cylinder using a conveyor belt.
- the invention is based, the Adjustment effort for setting several printing units to reduce changing operating conditions.
- any color transfer device can a forme cylinder of a printing unit or a ribbon that the Color from another point of the printing unit and around a cylinder on which the paint is pressed by the substrates is transferred.
- the invention is particularly for digital printing machines suitable where the for perfect printing required back pressure and the pulling forces from Forme cylinders much smaller than conventional ones Printing presses are.
- the bias to generate a such back pressure can be generated simply by the conveyor belt within its elastic range is kept tense.
- the strength of the contact pressure can be both about the pretensioning of the conveyor belt and about control its modulus of elasticity.
- impression cylinders or the like are omitted and instead its just a device for generating the bias must be provided, e.g. B. an adjustment device for one of the rollers around which the conveyor belt runs has the Printing machine according to the invention a very simple structure and is therefore inexpensive to manufacture.
- This printing machine has an endless Conveyor belt 1 on the two spaced Rolls 2 and 3 rotates and not on its upper run shown sheets conveyed similarly to that mentioned above Color copier.
- On the upper run of the conveyor belt 1 between the rollers 2 and 3 are four printing units in the same Distances arranged one behind the other, of which only the Forme cylinder 4 are shown.
- Below the upper run of the conveyor belt 1 are four impression cylinders 5 stored, each impression cylinder 5 a Forme cylinder 4 is opposite.
- the conveyor belt 1 runs in a straight line between the Forme cylinders 4 and impression cylinders 5 through, wherein between one forme cylinder 4 and one Back pressure cylinder 5 a contact force Fn perpendicular to Surface of the forme cylinder 4 acts through which on the Conveyor belt 1 conveyed sheets against the forme cylinder 4 to be pressed one by one from the inks Transfer form cylinders 4 to the arches.
- the Forme cylinder 4 and / or the impression cylinder 5 are for Setting to different paper thicknesses individually in the Adjustable height.
- the printing machine shown in Fig. 1 differs from 5 in that it does not Has impression cylinder. Instead, it is provided that the forme cylinder 4 are arranged so that the Conveyor belt 1 adjacent places on the circumference of the Forme cylinder 4 more or less far below a level are located, which is a straight course of the upper run of the Conveyor belt 1 would correspond. In other words the forme cylinder 4 arranged so that the upper run of the The conveyor belt 1 as a whole is approximately parabolic bends towards the lower run. Between each However, the conveyor belt 1 runs through two forme cylinders 4 rectilinear, the planes of each of the forme cylinders 4 arriving part and the moving part of the Cut conveyor belt 1 at a small angle. In this state, the conveyor belt 1 is under one Preload Fv.
- Each forme cylinder 4 is over a small part of its Wrapped around the circumference of the conveyor belt 1, the Wrap angle is equal to the angle at which to each forme cylinder 4 the levels of the incoming part and cut away part of the conveyor belt 1.
- a contact pressure Fn exerted by the biasing force Fv of the conveyor belt 1 depends, as in the figure by four Force parallelograms above the associated forme cylinders 4 shown. Due to the parabolic arrangement of the equally spaced forme cylinders 4 are the four Contact forces Fn1 to Fn4 are of the same magnitude.
- One of the rollers 2, 3 is by means of a not shown Adjustment device towards and away from the other adjustable.
- the adjustment device changes the biasing force Fv of the conveyor belt 1, so that on this way the contact forces Fn1 to Fn4 are increased together or can be reduced.
- This allows the Contact forces Fn1 to Fn4 on all printing units simultaneously be changed or adapted if this is in the operation of the Printing press is required.
- the Printing machine very quickly and easily to a new one Paper thickness or paper quality can be set without any settings on the individual printing units to have to make, as with conventional printing presses.
- a tensile conveyor belt 1 with a high Young's modulus e.g. B. a conveyor belt 1 made of steel or with steel inserts, can already be used with very small ones Adjustment paths of the rollers 2, 3 a large adjustment range be covered so that the effective length of the Conveyor belt 1 only when adjusting the pretension changes slightly.
- the pretension can only be achieved by Internal tension of the conveyor belt 1 when held Rollers 2, 3 are applied, but if necessary, z. B. an elastic suspension of one of the rollers 2, 3 is provided become.
- the invention is not based on one more or less straight line arrangement of the forme cylinders limited.
- z. B four Forme cylinder 6 along an arc at intervals be arranged one behind the other, the circular arc in case shown is slightly more than 180 °.
- each a deflection roller 7, 8 arranged such that a the deflecting rollers 7, 8 guided endless Conveyor belt 9 all four forme cylinders 6 partially wraps around.
- the returning run of the conveyor belt 9 is by two further deflecting rollers 10, 11 at a distance around the entire arrangement led around.
- One of the deflection rollers 7, 8, 10, 11, here the deflection roller 10, is adjustable to adjust the belt tension, as by a double arrow P is displayed.
- the Band tension can be used as in previous ones Embodiments of the contact forces between the forme cylinders 6 and the conveyor belt 9 are changed together.
- FIG Forme cylinder 6 enables a relatively compact Construction and is also for machine constructions from Interest that have one or more elements by all printing units are used together and within a dashed circle 12 may be arranged can.
- the Positions of the forme cylinder 6 are unchangeable; otherwise can also in the embodiment of Fig. 4, the forme cylinder 6 individually in the direction of Conveyor belt 9 and be adjustable away from it to be able to adjust the respective contact forces.
Landscapes
- Delivering By Means Of Belts And Rollers (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
- Fig. 1
- eine Prinzipskizze einer Druckmaschine mit einem Transportband und mehreren hintereinander angeordneten Druckwerken, an denen ein Gegendruck durch Vorspannung des Transportbandes erzeugt wird;
- Fig. 2 und Fig. 3
- die Druckmaschine von Fig. 1 in geänderten Einstellzuständen;
- Fig. 4
- eine weitere Ausführungsform einer Druckmaschine mit einem Transportband und mehreren Druckwerken, an denen ein Gegendruck durch Vorspannung des Transportbandes erzeugt wird; und
- Fig. 5
- eine Prinzipskizze einer Druckmaschine mit einem Transportband und mehreren hintereinander angeordneten Druckwerken, an denen der Gegendruck durch Gegendruckzylinder erzeugt wird.
- 1
- Transportband
- 2
- Walze
- 3
- Walze
- 4
- Formzylinder
- 5
- Gegendruckzylinder
- 6
- Formzylinder
- 7
- Umlenkwalze
- 8
- Umlenkwalze
- 9
- Transportband
- 10
- Umlenkwalze
- 11
- Umlenkwalze
- 12
- Kreis
Claims (9)
- Verfahren zur Erzeugung von Anpreßkräften zwischen zu bedruckenden Substraten, die auf einem endlosen Transportband befördert werden, und mehreren Farbübertragungseinrichtungen, die längs des Transportbandes in Abständen hintereinander angeordnet sind und die jede eine zylindrisch gekrümmte Oberfläche aufweisen, die dem Transportband gegenüberliegt,
dadurch gekennzeichnet,
daß die Anpreßkräfte (Fn1 - Fn4) durch eine Vorspannung (Fv) des Transportbandes (1; 9) und durch teilweise Umschlingung der Substrate an den gekrümmten Oberflächen der Farbübertragungseinrichtungen (4; 6) durch das Transportband erzeugt werden. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Anpreßkräfte (Fn1 - Fn4) gemeinsam eingestellt werden, indem die Vorspannung (Fv) des Transportbandes (1; 9) eingestellt wird. - Verfahren nach Anspruch 1 oder Anspruch 2,
dadurch gekennzeichnet,
daß die Anpreßkraft (Fn) an einer einzelnen Farbübertragungseinrichtung (4; 6) eingestellt wird, indem die Farbübertragungseinrichtung in Richtung auf das Transportband (1; 9) und davon weg verstellt wird. - Druckmaschine mit einem endlosen Transportband für zu bedruckende Substrate und mit mehreren Farbübertragungseinrichtungen, die längs des Transportbandes in Abständen hintereinander angeordnet sind und die jede eine zylindrisch gekrümmte Oberfläche aufweisen, die dem Transportband gegenüberliegt,
dadurch gekennzeichnet,
daß im Betrieb der Druckmaschine das Transportband (1; 9) unter einer Vorspannung (Fv) steht und die Farbübertragungseinrichtungen (4; 6) so angeordnet sind, daß sich an jeder Farbübertragungseinrichtung die Ebenen des ankommenden Teils und des sich entfernenden Teils des Transportbandes unter einem Winkel schneiden, wobei die Substrate an den gekrümmten Oberflächen der Farbübertragungseinrichtungen (4; 6) von dem Transportband (1; 9) umschlungen werden. - Druckmaschine nach Anspruch 4,
dadurch gekennzeichnet,
daß jede Farbübertragungseinrichtung ein Formzylinder (4; 6) oder ein um einen entsprechenden Zylinder umlaufendes Band eines Druckwerks ist. - Druckmaschine nach Anspruch 4 oder Anspruch 5,
dadurch gekennzeichnet,
daß das Transportband (1; 9) um mehrere Walzen (2, 3; 7, 8, 10, 11) umläuft, von denen wenigstens eine zur Einstellung der Bandspannung verstellbar ist. - Druckmaschine nach Anspruch 6,
dadurch gekennzeichnet,
daß das Transportband (1) um zwei in einem Abstand gelagerte Walzen (2, 3) umläuft und daß die Vorspannung und die Elastizität des Transportbandes so gewählt sind, daß Anpreßkräfte (Fn1 - Fn4) in einem gewünschten Bereich einstellbar sind, ohne daß sich die beiden Trums des Transportbandes berühren. - Druckmaschine nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet,
daß jede Farbübertragungseinrichtung (4; 6) zur Einstellung der jeweiligen Anpreßkraft (Fn1 - Fn4) einzeln in Richtung auf das Transportband (1; 9) und davon weg verstellbar ist. - Druckmaschine nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet,
daß sie eine digitale Druckmaschine ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19536359A DE19536359A1 (de) | 1995-09-29 | 1995-09-29 | Druckmaschine und Verfahren zum Bogentransport entlang mehrerer Formzylinder |
| DE19536359 | 1995-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0765746A1 EP0765746A1 (de) | 1997-04-02 |
| EP0765746B1 true EP0765746B1 (de) | 1999-04-07 |
Family
ID=7773607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96115358A Expired - Lifetime EP0765746B1 (de) | 1995-09-29 | 1996-09-25 | Druckmaschine und Verfahren zum Bogentransport entlang mehrerer Formzylinder |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5738010A (de) |
| EP (1) | EP0765746B1 (de) |
| JP (1) | JPH09123415A (de) |
| AU (1) | AU701120B2 (de) |
| DE (2) | DE19536359A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0999319B1 (de) | 1998-11-06 | 2005-01-26 | Harol International N.V. | Vorrichtung zur Befestigung und zum Verriegeln für aussen montierte Jalousien oder Sonnenschutzmarkisen |
| DE10023151A1 (de) * | 2000-05-12 | 2001-11-15 | Nexpress Solutions Llc | Einrichtung zur Umlenkung von Riemen zum Transport flächigen Materials |
| CN113263826B (zh) * | 2021-04-28 | 2024-12-13 | 温州市梦泰实业有限公司 | 一种紫光固化柔版印刷机 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1338165A (en) * | 1918-04-13 | 1920-04-27 | Enameled Steel Sign Company | Printing-machine |
| DE587513C (de) * | 1933-01-13 | 1933-11-04 | Georg Boettinger | Gummiwalzendruckmaschine zum ein- und mehrfarbigen Bedrucken verschieden dicker Bogen |
| DE1099560B (de) * | 1958-03-11 | 1961-02-16 | Wilhelm Ritzerfeld | Gegendruckelement fuer Rotationsvervielfaeltiger in Form eines rotierenden, den Druckzylinder teilweise umschliessenden Druckbandes |
| CH433174A (de) * | 1965-07-02 | 1967-04-15 | Buser Ag Maschf Fritz | Kontinuierlich arbeitende Vorrichtung zum Aufkleben eines zu bearbeitenden, insbesondere zu bedruckenden flächigen Gutes auf ein thermoplastbeschichtetes Transportband |
| GB1154756A (en) * | 1967-05-02 | 1969-06-11 | Bowater Packaging Ltd | A Printing Machine for Printing Articles Supplied by an Endless Conveyor Belt |
| US3934505A (en) * | 1973-12-10 | 1976-01-27 | Bernard Screen Printing Corporation | Method and apparatus for synchronous printing of a moving web |
| US4116127A (en) * | 1975-11-17 | 1978-09-26 | Brandt-Pra, Inc. | Ticket counter and endorser |
| JPS5827109B2 (ja) * | 1977-12-21 | 1983-06-07 | 王子製袋株式会社 | 内容物充填後の袋の表面に印刷する方法及び装置 |
| US4620807A (en) * | 1985-09-23 | 1986-11-04 | Xerox Corporation | Article transport for printers |
| DD264190A1 (de) * | 1987-09-04 | 1989-01-25 | Polygraph Leipzig | Schaufelradausleger zur schuppenauslage von druckprodukten |
| DE19527264A1 (de) * | 1995-07-26 | 1997-01-30 | Heidelberger Druckmasch Ag | Druckmaschine mit geradliniger Substratführung und Wendeeinrichtungen dafür |
-
1995
- 1995-09-29 DE DE19536359A patent/DE19536359A1/de not_active Withdrawn
-
1996
- 1996-09-25 EP EP96115358A patent/EP0765746B1/de not_active Expired - Lifetime
- 1996-09-25 DE DE59601597T patent/DE59601597D1/de not_active Expired - Fee Related
- 1996-09-27 JP JP8256738A patent/JPH09123415A/ja active Pending
- 1996-09-27 US US08/722,369 patent/US5738010A/en not_active Expired - Lifetime
- 1996-09-30 AU AU67904/96A patent/AU701120B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09123415A (ja) | 1997-05-13 |
| DE19536359A1 (de) | 1997-04-10 |
| EP0765746A1 (de) | 1997-04-02 |
| DE59601597D1 (de) | 1999-05-12 |
| US5738010A (en) | 1998-04-14 |
| AU701120B2 (en) | 1999-01-21 |
| AU6790496A (en) | 1997-04-10 |
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