EP0243720B1 - Folding apparatus with a second and third fold - Google Patents

Folding apparatus with a second and third fold Download PDF

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Publication number
EP0243720B1
EP0243720B1 EP87104922A EP87104922A EP0243720B1 EP 0243720 B1 EP0243720 B1 EP 0243720B1 EP 87104922 A EP87104922 A EP 87104922A EP 87104922 A EP87104922 A EP 87104922A EP 0243720 B1 EP0243720 B1 EP 0243720B1
Authority
EP
European Patent Office
Prior art keywords
folding
fold
cylinder
group
jaws
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
Application number
EP87104922A
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German (de)
French (fr)
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EP0243720A1 (en
Inventor
Eckhard Schneider
Erwin Saalfrank
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
Publication of EP0243720A1 publication Critical patent/EP0243720A1/en
Application granted granted Critical
Publication of EP0243720B1 publication Critical patent/EP0243720B1/en
Expired legal-status Critical Current

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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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/16—Rotary folders
    • B65H45/162—Rotary folders with folding jaw cylinders
    • B65H45/168—Rotary folders with folding jaw cylinders having changeable mode of operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
    • B41F13/56—Folding or cutting
    • B41F13/60—Folding or cutting crosswise

Definitions

  • the invention relates to a folder with a fold group for the second fold (first transverse fold) and at least one fold group for the third fold (second longitudinal fold) and transport devices for feeding the printed copies cut from a print carrier web.
  • the object of the invention is to provide a device with which printed copies of different types, which are preferably already folded at least once, are further processed so that the two printed copies are optionally available folded into one another so that they can be inserted in a magazine or magazine insert process can be added to another printed product, which is compact and which can be converted to normal production without a significant changeover time.
  • This object is achieved by applying the features of the characterizing part of claim 1. Further developments result from the subclaims and from the description in connection with the drawing. 1 schematically shows the folder according to the invention and in FIGS. 2 to 4 fold products.
  • the folding apparatus shown comprises a folding group 1 which, in one operating mode, a non-longitudinally cut print carrier web 3 and in two further operating modes a partial web 1a produced by the indicated longitudinal cutting device can be fed via a funnel inlet roller pair 4, a pair of pull roller 5, a cross perforation cylinder pair 6 and a further pair of pull roller 7.
  • the partial web 1a or the non-longitudinally cut print carrier web 3 is fed by means of a cutting knife cylinder 9, a folding knife cylinder 8 with the desired print copy length.
  • the printed copies A1 are needled onto the folding knife cylinder 8 at the front edge, for which purpose punctures 8 'are provided and are pushed into corresponding folding jaws 10' of the adjacent folding jaw cylinder 10 'with the aid of folding knives 8'.
  • Cutting knife cylinder 9, folding knife cylinder 8 and folding jaw cylinder 10 thus constitute the first Fold group 1, with which the so-called second fold, that is, the first transverse fold, is produced.
  • the print copies A1, which have been folded at least once, are transferred to a ribbon line 12, 13 behind the folding jaw cylinder 10.
  • the cross-folded print copies arrive in a straight version at a third Fold 14, the so-called second longitudinal fold, which, as is known, consists of a pair of folding rollers and a folding knife which can be inserted between them.
  • a second transverse fold can also be produced in the first folding group 1 on the printed copies A1, if this is desired.
  • a further operating mode is made possible by the folding knife cylinder 11, in which the folded printed copies A1 are lifted off the folding jaw cylinder 10 and guided into a ribbon line 24, 25. They then arrive at the second folding group 15, which can be constructed approximately identically to the first folding group 1 and in which the partial web 1b can be cut and folded in one mode of operation.
  • the partial web 1 is fed to the second folding group 15 via guide and regulating rollers 16, a pair of pull rollers 17.
  • This comprises a cutting knife cylinder 18, a folding knife cylinder 19 with punctures 19 'and folding knife 19 "and a folding jaw cylinder 20 with folding jaws 20'.
  • the construction according to the invention thus advantageously provides the possibility of cross-folded folding products A1 via the ribbon cables 24, 25, which are guided over deflecting roller 26 in one operating mode to feed the folding jaw cylinder 20, in whose folding jaws 20 'the cross-folded printed copies A2 produced by the partial web 1b are guided
  • Print copies A1, A2 are partially guided around the folding jaw cylinder 20 and then both reach the upper longitudinal fold 23 via the ribbon line 21, 22, which folds the print copies A1, A2 into one another as shown in Fig. 2.
  • print copies A1, A2 of different types can be easily 2 ineina nder couches are produced that can be enclosed together with a product, for example a newspaper.
  • the partial webs 1a and 1b are cut and folded separately in the folding groups 1, 15 and each processed in the associated longitudinal fold 14, 23 into the product according to FIG. 3.
  • the slitting device indicated in the drawing according to FIG. 1 out of operation and to feed the uncut web only to the lower folding group 1.
  • the cross-folded, not longitudinally cut, printed copies can alternately either via the gripper and folding knife cylinder 11, the ribbon line 24, 25, the folding jaw cylinder 20, the ribbon lines 21, 22, the upper longitudinal fold 23 or from the folding jaw cylinder 10, via the ribbon lines 12, 13 the lower longitudinal fold 14 are fed.
  • Products according to FIG. 4 can thus be produced.
  • This splitting can significantly increase the speed of the folder.
  • the folding jaw cylinder 20 of the upper folding group 15 is also partially integrated into the transport path.
  • the folder of the invention is compact. Only short changeover times between the three possible production types for producing the folded products according to FIGS. 2 to 4 are required.
  • the merging of the printed copies A1, A2 is possible with great accuracy on the folding jaw cylinder 20, it being possible for this to be rotated in the circumferential direction in order to be superimposed on the leading edges. During this process, the printed copy A2 is still held in the jaws 20 '.
  • a continuous line from the gripper and folding knife cylinder 11 to the upper longitudinal fold 23 can also be used instead of the lower lines 25 or 22, which line then has to be partially guided around the folding jaw cylinder 20.

Description

Die Erfindung betrifft einen Falzapparat mit einer Falzgruppe für den zweiten Falz (erster Querfalz) und mindestens einer Falzgruppe für den dritten Falz (zweiter Längsfalz) und Transportvorrichtungen zum Zuführen der von einer Druckträgerbahn zugeschnittenen Druckexemplare.The invention relates to a folder with a fold group for the second fold (first transverse fold) and at least one fold group for the third fold (second longitudinal fold) and transport devices for feeding the printed copies cut from a print carrier web.

Häufig ist es erwünscht, bereits quergefalzte Produkte unterschiedlicher Art, beispielsweise für Damen- und Herrenmode, lose ineinanderliegend gemeinsam einer Zeitung als Beilage beizufügen. Bisher mußten in diesem Fall die unterschiedlichen Exemplare in zwei verschiedenen Falzgruppen erzeugt und durch Nachverarbeitung ineinandergelegt und in die Zeitung eingefügt werden. Diese erfordert naturgemäß hohen maschinellen und zeitlichen Aufwand.It is often desirable to enclose different types of cross-folded products, for example for women's and men's fashion, loosely one inside the other as a supplement to a newspaper. Previously, in this case, the different copies had to be created in two different fold groups and put together in postprocessing and inserted into the newspaper. This naturally requires a high level of machine and time.

Aufgabe der Erfindung ist es, eine Vorrichtung zu schaffen, mit der Druckexemplare unterschiedlicher Art, die vorzugsweise bereits mindestens einmal quergefalzt sind, so weiterbehandelt werden, daß als Endprodukt wahlweise die beiden Druckexemplare ineinandergefalzt zur Verfügung stehen, so daß diese in einem Einlegevorgang einer Zeitschrift oder einem anderen Druckprodukt beigefügt werden können, die kompakt baut und die ohne wesentliche Umrüstzeit auf Normalproduktion umstellbar ist. Diese Aufgabe wird durch die Anwendung der Merkmale des Kennzeichens des Anspruchs 1 gelöst. Weiterbildungen ergeben sich aus den Unteransprüchen sowie aus der Beschreibung in Verbindung mit der Zeichnung. Diese zeigt in Fig. 1 schematisch den erfindungsgemäßen Falzapparat und in den Fig. 2 bis 4 Falzprodukte.The object of the invention is to provide a device with which printed copies of different types, which are preferably already folded at least once, are further processed so that the two printed copies are optionally available folded into one another so that they can be inserted in a magazine or magazine insert process can be added to another printed product, which is compact and which can be converted to normal production without a significant changeover time. This object is achieved by applying the features of the characterizing part of claim 1. Further developments result from the subclaims and from the description in connection with the drawing. 1 schematically shows the folder according to the invention and in FIGS. 2 to 4 fold products.

Der dargestellte Falzapparat umfaßt eine Falzgruppe 1, der bei einer Betriebsart eine nicht längsgeschnittene Druckträgerbahn 3 und bei zwei weiteren Betriebsarten eine durch die angedeutete Längsschneidvorrichtung erzeugte Teilbahn 1a über ein Trichtereinlaufwalzenpaar 4, ein Zugwalzenpaar 5, ein Querperforationszylinderpaar 6 und ein weiteres Zugwalzenpaar 7 zuführbar ist. Die Teilbahn 1a bzw. die nicht längsgeschnittene Druckträgerbahn 3 wird mittels eines Schneidmesserzylinders 9, einem Falzmesserzylinder 8 mit der gewünschten Druckexemplarlänge zugeführt. An dem Falzmesserzylinder 8 werden die Druckexemplare A1 an der Vorderkante aufgenadelt, wofür entsprechende Punkturen 8' vorgesehen sind und mit Hilfe von Falzmessern 8" in entsprechende Falzklappen 10' des benachbarten Falzklappenzylinders 10 gestoßen. Schneidmesserzylinder 9, Falzmesserzylinder 8 und Falzklappenzylinder 10 stellen somit die erste Falzgruppe 1 dar, mit der der sogenannte zweite Falz, das ist der erste Querfalz erzeugt wird. Hinter dem Falzklappenzylinder 10 werden die zumindest einmal quergefalzten Druckexemplare A1 in eine Bandleitung 12, 13 übergeben. Bei einer Betriebsweise gelangen die quergefalzten Druckexemplare in Geradeausführung zu einem dritten Falz 14, dem sogenannten zweiten Längsfalz, der bekanntlich aus einem Falzwalzenpaar und einem darüber angeordneten zwischen dieses einstoßbaren Falzmesser besteht. Es versteht sich, daß ggf. auch anstelle des Längsfalzes der dritte Falz als Querfalz ausgebildet sein kann.The folding apparatus shown comprises a folding group 1 which, in one operating mode, a non-longitudinally cut print carrier web 3 and in two further operating modes a partial web 1a produced by the indicated longitudinal cutting device can be fed via a funnel inlet roller pair 4, a pair of pull roller 5, a cross perforation cylinder pair 6 and a further pair of pull roller 7. The partial web 1a or the non-longitudinally cut print carrier web 3 is fed by means of a cutting knife cylinder 9, a folding knife cylinder 8 with the desired print copy length. The printed copies A1 are needled onto the folding knife cylinder 8 at the front edge, for which purpose punctures 8 'are provided and are pushed into corresponding folding jaws 10' of the adjacent folding jaw cylinder 10 'with the aid of folding knives 8'. Cutting knife cylinder 9, folding knife cylinder 8 and folding jaw cylinder 10 thus constitute the first Fold group 1, with which the so-called second fold, that is, the first transverse fold, is produced. The print copies A1, which have been folded at least once, are transferred to a ribbon line 12, 13 behind the folding jaw cylinder 10. In one operating mode, the cross-folded print copies arrive in a straight version at a third Fold 14, the so-called second longitudinal fold, which, as is known, consists of a pair of folding rollers and a folding knife which can be inserted between them.

Durch den an den Falzklappenzylinder 10 angestellten Falzmesserzylinder 11 mit Greifern 11' kann an den Druckexemplaren A1 auch ein zweiter Querfalz in der ersten Falzgruppe 1 erzeugt werden, falls dies gewünscht ist. Erfindungsgemäß wird eine weitere Betriebsart über den Falzmesserzylinder 11 ermöglicht, bei der die gefalzten Druckexemplare A1 von dem Falzklappenzylinder 10 abgehoben und in eine Bandleitung 24, 25 geführt werden. Anschlie- βend gelangen sie zu der zweiten Falzgruppe 15, die in etwa identisch aufgebaut sein kann, wie die erste Falzgruppe 1 und in der bei einer Betriebsweise die Teilbahn 1b geschnitten und quergefalzt werden kann. Der zweiten Falzgruppe 15 wird die Teilbahn 1 über Leit- und Regulierwalzen 16, ein Zugwalzenpaar 17 zugeführt. Diese umfaßt einen Schneidmesserzylinder 18, einen Falzmesserzylinder 19 mit Punkturen 19' und Falzmesser 19" sowie einem Falzklappenzylinder 20 mit Falzklappen 20'. Mit dem erfindungsgemäßen Aufbau ergibt sich somit in vorteilhafter Weise die Möglichkeit, die quergefalzten Falzprodukte A1 über die Bandleitungen 24, 25, die über Umlenkwalze 26 geführt werden, bei einer Betriebsart dem Falzklappenzylinder 20 zuzuführen, in dessen Falzklappen 20' die von der Teilbahn 1b erzeugten quergefalzten Druckexemplare A2 geführt werden. Erfindungsgemäß erfolgt das Zusammenführen der Druckexemplare A1 und A2 vorderkantengenau am Falzklappenzylinder 20. Anschließend werden die zusammengeführten Druckexemplare A1, A2 teilweise um den Falzklappenzylinder 20 geführt und gelangen dann beide über die Bandleitung 21, 22 zu dem oberen Längsfalz 23, der die Druckexemplare A1, A2 gemäß Fig. 2 ineinanderfalzt. Somit können auf einfache Weise Druckexemplare A1, A2 unterschiedlicher Art, die gemäß Fig. 2 ineinanderliegen hergestellt werden, die gemeinsam einem Produkt, beispielsweise einer Zeitung beigelegt werden können.Due to the folding blade cylinder 11 with grippers 11 'placed on the folding jaw cylinder 10, a second transverse fold can also be produced in the first folding group 1 on the printed copies A1, if this is desired. According to the invention, a further operating mode is made possible by the folding knife cylinder 11, in which the folded printed copies A1 are lifted off the folding jaw cylinder 10 and guided into a ribbon line 24, 25. They then arrive at the second folding group 15, which can be constructed approximately identically to the first folding group 1 and in which the partial web 1b can be cut and folded in one mode of operation. The partial web 1 is fed to the second folding group 15 via guide and regulating rollers 16, a pair of pull rollers 17. This comprises a cutting knife cylinder 18, a folding knife cylinder 19 with punctures 19 'and folding knife 19 "and a folding jaw cylinder 20 with folding jaws 20'. The construction according to the invention thus advantageously provides the possibility of cross-folded folding products A1 via the ribbon cables 24, 25, which are guided over deflecting roller 26 in one operating mode to feed the folding jaw cylinder 20, in whose folding jaws 20 'the cross-folded printed copies A2 produced by the partial web 1b are guided Print copies A1, A2 are partially guided around the folding jaw cylinder 20 and then both reach the upper longitudinal fold 23 via the ribbon line 21, 22, which folds the print copies A1, A2 into one another as shown in Fig. 2. Thus, print copies A1, A2 of different types can be easily 2 ineina nder couches are produced that can be enclosed together with a product, for example a newspaper.

Bei einer anderen Betriebsweise werden die Teilbahnen 1a und 1 b separat in den Falzgruppen 1, 15 zugeschnitten und quergefalzt und jeweils in den zugehörigen Längsfalz 14, 23 zu dem Produkt gemäß Fig. 3 verarbeitet.In another mode of operation, the partial webs 1a and 1b are cut and folded separately in the folding groups 1, 15 and each processed in the associated longitudinal fold 14, 23 into the product according to FIG. 3.

In vorteilhafter Weise ist es auch möglich, die in der Zeichnung gemäß Fig. 1 angedeutete Längsschneidvorrichtung außer Betrieb zu setzen und die ungeschnitte Bahn lediglich der unteren Falzgruppe 1 zuzuführen. Von dieser aus können abwechselnd die quergefalzten nicht längsgeschnittenen Druckexemplare entweder über den Greifer-und Falzmesserzylinder 11, die Bandleitung 24, 25, den Falzklappenzylinder 20, die Bandleitungen 21, 22 dem oberen Längsfalz 23 oder von dem Falzklappenzylinder 10, über die Bandleitungen 12,13 dem unteren Längsfalz 14 zugeführt werden. Es lassen sich so Produkte gemäß Fig. 4 herstellen. Durch diese Aufsplittung kann die Arbeitsgeschwindigkeit des Falzapparates wesentlich erhöht werden. Bei dieser Betriebsweise wird auch der Falzklappenzylinder 20 der oberen Falzgruppe 15 teilweise in den Transportweg integriert.In an advantageous manner, it is also possible to put the slitting device indicated in the drawing according to FIG. 1 out of operation and to feed the uncut web only to the lower folding group 1. From this, the cross-folded, not longitudinally cut, printed copies can alternately either via the gripper and folding knife cylinder 11, the ribbon line 24, 25, the folding jaw cylinder 20, the ribbon lines 21, 22, the upper longitudinal fold 23 or from the folding jaw cylinder 10, via the ribbon lines 12, 13 the lower longitudinal fold 14 are fed. Products according to FIG. 4 can thus be produced. This splitting can significantly increase the speed of the folder. In this mode of operation, the folding jaw cylinder 20 of the upper folding group 15 is also partially integrated into the transport path.

Der erfindungsgemäße Falzapparat baut kompakt. Es sind nur geringe Umrüstzeiten zwischen den drei möglichen Produktionsarten zur Erzeugung der Falzprodukte gemäß den Fig. 2 bis 4 erforderlich. Das Zusammenführen der Druckexemplare A1, A2 ist mit großer Genauigkeit an dem Falzklappenzylinder 20 möglich, wobei ggf. dieser in Umfangsrichtung zum vorderkantengenauen Übereinanderlegen verdreht werden kann. Bei diesem Vorgang wird das Druckexemplar A2 noch in den Falzklappen 20' gehalten. Gegebenenfalls kann auch anstelle der unteren Leitungen 25 bzw. 22 eine durchgehende Leitung von dem Greifer- und Falzmesserzylinder 11 bis zum oberen Längsfalz 23 verwendet werden, die dann teilweise um den Falzklappenzylinder 20 geführt werden muß.The folder of the invention is compact. Only short changeover times between the three possible production types for producing the folded products according to FIGS. 2 to 4 are required. The merging of the printed copies A1, A2 is possible with great accuracy on the folding jaw cylinder 20, it being possible for this to be rotated in the circumferential direction in order to be superimposed on the leading edges. During this process, the printed copy A2 is still held in the jaws 20 '. If necessary, a continuous line from the gripper and folding knife cylinder 11 to the upper longitudinal fold 23 can also be used instead of the lower lines 25 or 22, which line then has to be partially guided around the folding jaw cylinder 20.

Claims (4)

1. Folding apparatus having a folding group (1) for the second fold (first cross fold) and at least one folding group (14, 23) for the third fold (second longitudinal fold) and transport devices for supplying the printed copies (A1, A2) cut to size from a print carrier web (3), characterised in that printed copies of different types (A1 and A2) are provided with the second fold (first cross fold) in separate folding groups (8, 9, 10; 18, 19, 20), in that one folding group (18, 19, 20) is arranged to be offset as regards height with respect to the other folding group (8, 9, 10), and in that the printed copies (A2) cross-folded in this folding group (18, 19, 20) are laid, still held in folding jaws (20'), one above the other on the associated folding jaws cylinder (20) with the crossfold- ed printed copies (A1) supplied via conveyor belts (24, 25) from the other folding group (8, 9, 10), with their front edges accurately aligned, and can be commonly guided partially round this folding jaws cylinder (20) after which the printed copies (A1, A2) can be commonly conveyed via a conveyor belt (21, 22) to a third folding group (23) effecting the third fold (second longitudinal fold).
2. Folding apparatus according to claim 1, characterised in that the print carrier web (3) conveyed via a former (2) is cut by a longitudinal cutting device on the former (2) into partial webs (1a, 1 b), in that one partial web (1a) is conveyed over a cutting blade cylinder (9) and a folding blade cylinder (8) to a folding jaws cylinder (10) of the first folding group (8, 9, 10) for the second fold (first cross fold), in that the other partial web (1b) can be conveyed over a cutting cylinder (18) to a folding blade cylinder (19) and then to a folding jaws cylinder (20) of the second folding group (18, 19, 20) for the second fold (first cross fold), and in that associated with the folding jaws cylinder (10) of the first folding group (8, 9, 10) for the second fold there is a folding blade cylinder (11), equipped with grippers (11"), with which cylinder (11) either a second crossfold is produced on the folding jaws cylinder (10) or by means of which the already cross-folded printed copies (Al) can be conveyed via a conveyor belt system (24, 25) to the folding jaws cylinder (20) of the other folding group (18, 19, 20).
3. Folding apparatus according to one of the preceding claims, characterised in that when the longitudinal cutting device on the former (2) is turned off, the non-longitudinally-cut printing carrier web (3) is only supplied to the lower folding group (8, 9, 10), and in that the printed copies cross-folded on the folding jaws cylinder can be alternately conveyed, via the gripper- and folding blade cylinder (11), the conveyor belts (24, 25), the folding jaws cylinder (20) and the conveyor belts (21, 22), to the upper third folding group (23) or via the conveyor belts (12, 13) to a lower third folding group (14).
4. Folding apparatus according to one of the preceding claims, characterised in that the partial products (A1) of the folding group (8, 9, 10) can be conveyed to the lower third folding group (14), and the partial products (A2) of the folding group (18, 19, 20) can be conveyed to the upper third folding group (23).
EP87104922A 1986-04-26 1987-04-02 Folding apparatus with a second and third fold Expired EP0243720B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3614263 1986-04-26
DE19863614263 DE3614263A1 (en) 1986-04-26 1986-04-26 FOLDING APPARATUS WITH A SECOND AND THIRD FOLD

Publications (2)

Publication Number Publication Date
EP0243720A1 EP0243720A1 (en) 1987-11-04
EP0243720B1 true EP0243720B1 (en) 1989-09-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104922A Expired EP0243720B1 (en) 1986-04-26 1987-04-02 Folding apparatus with a second and third fold

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US (1) US4746107A (en)
EP (1) EP0243720B1 (en)
JP (1) JP2771161B2 (en)
DE (2) DE3614263A1 (en)

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DE3404170C2 (en) * 1984-02-07 1993-11-11 Heidelberger Druckmasch Ag Folder on web-fed rotary printing machines
DE3422755C2 (en) * 1984-06-20 1986-06-19 Koenig & Bauer AG, 8700 Würzburg Folder for book folds on a web-fed rotary printing press
FR2575701B1 (en) * 1985-01-10 1988-05-27 Marinoni Harris Sa SUB-ASSEMBLY FOR ADJUSTING A JAW FOLDING MACHINE FOR ROTARY PRESS
DE8503157U1 (en) * 1985-02-06 1985-05-30 Albert-Frankenthal Ag, 6710 Frankenthal Device for the production of folded products

Also Published As

Publication number Publication date
DE3614263A1 (en) 1987-10-29
US4746107A (en) 1988-05-24
JPS62275974A (en) 1987-11-30
JP2771161B2 (en) 1998-07-02
EP0243720A1 (en) 1987-11-04
DE3760529D1 (en) 1989-10-12
DE3614263C2 (en) 1989-10-26

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