EP1475333B1 - Buckling folder - Google Patents

Buckling folder Download PDF

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Publication number
EP1475333B1
EP1475333B1 EP20030010424 EP03010424A EP1475333B1 EP 1475333 B1 EP1475333 B1 EP 1475333B1 EP 20030010424 EP20030010424 EP 20030010424 EP 03010424 A EP03010424 A EP 03010424A EP 1475333 B1 EP1475333 B1 EP 1475333B1
Authority
EP
European Patent Office
Prior art keywords
sheet
folding roller
folding
roller pair
edge
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 - Fee Related
Application number
EP20030010424
Other languages
German (de)
French (fr)
Other versions
EP1475333B8 (en
EP1475333A1 (en
Inventor
Klaus Stocklassa
Bodo Tegtmeier
Georg Dannemann
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.)
MBO Postpress Solutions GmbH
Original Assignee
Maschinenbau Oppenweiler Binder GmbH and Co KG
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 Maschinenbau Oppenweiler Binder GmbH and Co KG filed Critical Maschinenbau Oppenweiler Binder GmbH and Co KG
Priority to EP20030010424 priority Critical patent/EP1475333B8/en
Priority to DE50306184T priority patent/DE50306184D1/en
Publication of EP1475333A1 publication Critical patent/EP1475333A1/en
Application granted granted Critical
Publication of EP1475333B1 publication Critical patent/EP1475333B1/en
Publication of EP1475333B8 publication Critical patent/EP1475333B8/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B65H45/14—Buckling folders
    • B65H45/142—Pocket-type folders
    • B65H45/147—Pocket-type folders folding rollers therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/25—Damages to handled material
    • B65H2601/251—Smearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/25—Damages to handled material
    • B65H2601/2525—Collisions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/25—Damages to handled material
    • B65H2601/253—Damages to handled material to particular parts of material
    • B65H2601/2531—Edges

Definitions

  • the invention relates to a pocket folder according to the preamble of patent claim 1.
  • Such a pocket folder is known, for example, from EP 0 732 294 A3.
  • the driven folding rollers are driven by a single drive via toothed belts or gears.
  • a sheet is inserted through a first pair of folding rollers in the folding pocket of the folding unit, it strikes with its leading edge on the sheet stop.
  • curling may occur, causing variations in the accuracy of a fold.
  • the transport speed of the first folding roller pair must therefore be reduced so that the formation of marks on the sheet edge when hitting the sheet stop is prevented.
  • the invention has for its object to provide with simple design means a pocket folder with high performance.
  • the method according to claim 4 and 5 can be carried out with the pocket folder according to the invention.
  • the transport speed of the Falzwalzencrue is independently adjustable, it is possible to reduce the transport speed of the sheet just before the impact of a leading edge on the sheet stop and to increase again after the impact of the sheet stop. As a result, the formation of marks on the leading edge of the sheet and a wave formation can be prevented and the performance of the pocket folder can be increased.
  • the transport speed can be increased in the short term, just before the leading edge sheet after the entry of the sheet in the second pair of folding rollers is in the vicinity of the trailing sheet section, which is still transported by the first pair of folding rollers.
  • a bulge in the trailing portion of the sheet behind the first pair of folding rollers are formed, by the unfolding of the already folded portion of the sheet is prevented, so that the sheet is properly inserted between the folding rollers of the second pair of folding rollers.
  • the production speed of the pocket folder is increased, but also the quality of the folded sheets.
  • the Taschenfalzwerk shown in Figs. 1 to 4 has a folding pocket 24, in which an adjustable sheet stop 26 is provided.
  • a first, vertically arranged pair of folding rollers 18, 20 is provided, through which a sheet 12 is inserted through the inlet opening 25 until the leading sheet edge 30 hits the sheet stop 26 in the folding pocket 24.
  • the upper folding roller 18 of the first folding roller pair in FIG. 1 is driven by a servomotor SV1.
  • the second folding roller 20 is driven by its own servo motor SV3.
  • Fig. 1 shows the inlet of a sheet 12 in the folding pocket to form a first fold.
  • the transport speed of the first pair of folding rollers 18, 20 is reduced shortly before the leading edge 30 hits the sheet stop 26.
  • the transport speed is increased again to the original transport speed.
  • the normal transport speed is for example 200 m / min.
  • the transport speed is reduced to 150 m / min.
  • the leading edge of the sheet 30 is just before hitting the trailing portion 36 of the sheet 12.
  • the first pair of folding rollers 18, 20 as possible accelerated as possible short time in addition to promote 1 to 2 cm bow. Subsequently, the folding rollers 18, 20 are rotated again at normal speed. As a result of the acceleration, after the first folding roller pair 18, 20, a bulge 34 is formed which presses the leading end 30 of the sheet downwards in the direction of the folding roller gap between the folding rollers 20, 22. This ensures that the sheet edge 30 is inserted properly between the folding rollers 20, 22 in order to achieve a decent folding result.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Description

Die Erfindung betrifft ein Taschenfalzwerk nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a pocket folder according to the preamble of patent claim 1.

Ein solches Taschenfalzwerk ist beispielsweise aus der EP 0 732 294 A3 bekannt. Bei den bekannten Taschenfalzwerken werden die angetriebenen Falzwalzen von einem einzigen Antrieb über Zahnriemen oder Zahnräder angetrieben. Wenn ein Bogen durch ein erstes Falzwalzenpaar in die Falztasche des Falzwerks eingeführt wird, trifft er mit seiner voreilenden Kante auf den Bogenanschlag auf. Je höher die Geschwindigkeit ist, mit der der Bogen auf den Bogenanschlag auftrifft, desto höher ist die Gefahr, dass an der Bogenkante ungewollte Markierungen auftreten, die die Qualität des Bogens beeinträchtigen. Darüber hinaus kann eine Wellenbildung auftreten, durch die Schwankungen der Genauigkeit eines Falzes verursacht werden können. Die Transportgeschwindigkeit des ersten Falzwalzenpaares muss daher so verringert werden, dass eine Bildung von Markierungen an der Bogenkante beim Auftreffen auf den Bogenanschlag verhindert wird. Bei der Bildung von Wickelfalzen oder Fensterfalzen kann es vorkommen, dass die Bogenkante eines zuvor gefalzten Falzabschnittes auf einen nacheilenden Abschnitt des Bogens so auftrifft, dass der Falzabschnitt vor dem Durchlauf durch das zweite Falzwalzenpaar aufgeklappt wird, wodurch es zu Doppelbrüchen kommen kann. Auch in diesem Fall ist die Transportgeschwindigkeit des ersten Falzwalzenpaares so zu verringern, dass dies verhindert wird. Der nächstliegenden Stand der Technik stellt die EP 0 844 205 A1 dar.Such a pocket folder is known, for example, from EP 0 732 294 A3. In the known Taschenfalzwerken the driven folding rollers are driven by a single drive via toothed belts or gears. When a sheet is inserted through a first pair of folding rollers in the folding pocket of the folding unit, it strikes with its leading edge on the sheet stop. The higher the speed at which the sheet strikes the sheet stopper, the greater the risk of unwanted markings on the sheet edge which affect the quality of the sheet. In addition, curling may occur, causing variations in the accuracy of a fold. The transport speed of the first folding roller pair must therefore be reduced so that the formation of marks on the sheet edge when hitting the sheet stop is prevented. In the formation of winding folds or window folds, it may happen that the sheet edge of a previously folded seaming portion so impinges on a trailing portion of the sheet that the folding portion is unfolded before passing through the second pair of folding rollers, which can lead to double breaks. Also in this case, the transport speed of the first pair of folding rollers should be reduced so that this is prevented. The closest prior art is EP 0 844 205 A1.

Der Erfindung liegt die Aufgabe zugrunde, mit konstruktiv einfachen Mitteln ein Taschenfalzwerk mit hoher Leistung zu schaffen.The invention has for its object to provide with simple design means a pocket folder with high performance.

Diese Aufgabe wird erfindungsgemäß durch ein Taschenfalzwerk mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen des erfindungsgemäßen Taschenfalzwerkes sind Gegenstand der Patentansprüche 2 und 3.This object is achieved by a pocket folder with the features of claim 1. Advantageous embodiments of the invention Taschenfalzwerkes are the subject of claims 2 and 3.

Mit dem erfindungsgemäßen Taschenfalzwerk können die Verfahren nach Anspruch 4 und 5 durchgeführt werden.The method according to claim 4 and 5 can be carried out with the pocket folder according to the invention.

Da die Transportgeschwindigkeit der Falzwalzenpaare unabhängig voneinander einstellbar ist, ist es möglich, die Transportgeschwindigkeit des Bogens kurz vor dem Auftreffen einer voreilenden Kante auf dem Bogenanschlag zu verringern und nach dem Auftreffen des Bogenanschlags wieder zu erhöhen. Hierdurch kann die Bildung von Markierungen an der voreilenden Bogenkante und eine Wellenbildung verhindert sowie die Leistung des Taschenfalzwerkes erhöht werden.Since the transport speed of the Falzwalzenpaare is independently adjustable, it is possible to reduce the transport speed of the sheet just before the impact of a leading edge on the sheet stop and to increase again after the impact of the sheet stop. As a result, the formation of marks on the leading edge of the sheet and a wave formation can be prevented and the performance of the pocket folder can be increased.

Bei der Bildung von Wickel- oder Fensterfalzen kann die Transportgeschwindigkeit kurzfristig erhöht werden, kurz bevor die voreilende Bogenkante nach dem Einzug des Bogens in das zweite Falzwalzenpaar sich in der Nähe des nachlaufenden Bogenabschnitts befindet, der noch durch das erste Falzwalzenpaar transportiert wird. Hierdurch kann eine Ausbauchung im nacheilenden Abschnitt des Bogens hinter dem ersten Falzwalzenpaar gebildet werden, durch die ein Auseinanderklappen des bereits gefalzten Abschnittes des Bogens verhindert wird, so dass der Bogen ordnungsgemäß zwischen die Falzwalzen des zweiten Falzwalzenpaares eingeführt wird. Hierdurch wird nicht nur die Produktionsgeschwindigkeit des Taschenfalzwerkes erhöht, sondern auch die Qualität der gefalzten Bögen.In the formation of winding or Fensterfalzen the transport speed can be increased in the short term, just before the leading edge sheet after the entry of the sheet in the second pair of folding rollers is in the vicinity of the trailing sheet section, which is still transported by the first pair of folding rollers. In this way, a bulge in the trailing portion of the sheet behind the first pair of folding rollers are formed, by the unfolding of the already folded portion of the sheet is prevented, so that the sheet is properly inserted between the folding rollers of the second pair of folding rollers. As a result, not only the production speed of the pocket folder is increased, but also the quality of the folded sheets.

Ausführungsbeispiele der Erfindung werden nachstehend an Hand von Zeichnungen näher erläutert. Es zeigen

Fig. 1
schematisch ein Taschenfalzwerk, in das ein ungefalzter Bogen einläuft,
Fig. 2
schematisch das Taschenfalzwerk von Fig. 1, wobei ein Bogen eingeführt wird, bei dem eine erste Falzung ausgebildet ist,
Fig. 3
die Ansicht von Fig. 2 unmittelbar zum Zeitpunkt der Einführung des Bogens zwischen die Falzwalzen des zweiten Falzwalzenpaares,
Fig. 4
die Ansicht von Fig. 3 kurz nach dem Einzug des Bogens in das zweite Falzwalzenpaar.
Embodiments of the invention are explained below with reference to drawings. Show it
Fig. 1
schematically a pocket folder into which an unfolded sheet enters,
Fig. 2
1 schematically shows the pocket folder of FIG. 1, introducing a sheet in which a first fold is formed;
Fig. 3
the view of Figure 2 immediately at the time of insertion of the sheet between the folding rollers of the second folding roller pair,
Fig. 4
the view of Fig. 3 shortly after the insertion of the sheet in the second pair of folding rollers.

Das in den Fig. 1 bis 4 gezeigte Taschenfalzwerk weist eine Falztasche 24 auf, in der ein einstellbarer Bogenanschlag 26 vorgesehen ist. Vor der Einlauföffnung 25 der Falztasche 24 ist ein erstes, vertikal angeordnetes Falzwalzenpaar 18, 20 vorgesehen, durch das ein Bogen 12 durch die Einlauföffnung 25 bis zum Aufschlagen der voreilenden Bogenkante 30 an den Bogenanschlag 26 in die Falztasche 24 eingeführt wird. Die in Fig. 1 obere Falzwalze 18 des ersten Falzwalzenpaares wird von einem Servomotor SV1 angetrieben. Die zweite Falzwalze 20 wird über einen eigenen Servomotor SV3 angetrieben. Nach dem Auftreffen der voreilenden Kante 30 des Bogens 12 auf den Bogenanschlag 26 wird aufgrund eines weiteren Transports des Bogens 12 durch das erste Falzwalzenpaar 18, 20 der Bogen in den Falzwalzenspalt eines zweiten, horizontal angeordneten Falzwalzenpaares eingeführt, das von der Falzwalze 20 und einer weiteren Falzwalze 22 gebildet wird, die durch einen weiteren Servomotor SV2 angetrieben wird. Die Geschwindigkeit der Servomotoren SV1 und SV2 und SV3 ist unabhängig von einander einstellbar.The Taschenfalzwerk shown in Figs. 1 to 4 has a folding pocket 24, in which an adjustable sheet stop 26 is provided. In front of the inlet opening 25 of the folding pocket 24, a first, vertically arranged pair of folding rollers 18, 20 is provided, through which a sheet 12 is inserted through the inlet opening 25 until the leading sheet edge 30 hits the sheet stop 26 in the folding pocket 24. The upper folding roller 18 of the first folding roller pair in FIG. 1 is driven by a servomotor SV1. The second folding roller 20 is driven by its own servo motor SV3. After hitting the leading edge 30 of the sheet 12 on the sheet stop 26 is due to a further transport of the sheet 12 by the first pair of folding rollers 18, 20 of the sheet inserted into the Falzwalzenspalt a second, horizontally arranged Falzwalzenpaares that of the folding roller 20 and another Folding roller 22 is formed, which is driven by a further servo motor SV2. The speed of the servomotors SV1 and SV2 and SV3 can be adjusted independently of each other.

Fig. 1 zeigt den Einlauf eines Bogens 12 in die Falztasche zur Bildung einer ersten Falzung. Um eine Beschädigung der voreilenden Kante 30 des Bogens 12 beim Auftreffen auf den Bogenanschlag 26 zu verhindern, wird durch Steuerung des Servomotors SV1 die Transportgeschwindigkeit des ersten Falzwalzenpaares 18, 20 kurz vor Auftreffen der voreilenden Kante 30 auf den Bogenanschlag 26 verringert. Nach Auftreffen der Bogenkante 30 auf den Bogenanschlag 26 wird die Transportgeschwindigkeit wieder auf die ursprüngliche Transportgeschwindigkeit erhöht. Die normale Transportgeschwindigkeit beträgt beispielsweise 200 m/min. Wenn sich die voreilende Kante 30 ca. 4 cm vor dem Bogenanschlag 26 befindet wird die Transportgeschwindigkeit auf 150m/min verringert.Fig. 1 shows the inlet of a sheet 12 in the folding pocket to form a first fold. In order to prevent damage to the leading edge 30 of the sheet 12 when hitting the sheet stop 26, by controlling the servo motor SV1, the transport speed of the first pair of folding rollers 18, 20 is reduced shortly before the leading edge 30 hits the sheet stop 26. After hitting the sheet edge 30 on the sheet stop 26, the transport speed is increased again to the original transport speed. The normal transport speed is for example 200 m / min. When the leading edge 30 is about 4 cm in front of the sheet stop 26, the transport speed is reduced to 150 m / min.

Die Fig. 2 bis 4 zeigen die Falzung eines Bogens 12 in dem Taschenfalzwerk 10, an dem zur Bildung eines Falzabschnittes 31 bereits eine Falzung so durchgeführt wurde, dass das voreilende Ende 30 des Bogens auf Höhe der Bogenmitte liegt. In der in Fig. 2 gezeigten Stellung befindet sich die Falzkante 28 unmittelbar vor dem Bogenanschlag 26. Durch einen weiteren Antrieb des ersten Falzwalzenpaares 18, 20 wird der Bogen 12 gestaucht und entlang der Falzlinie 32 in der Bogenmitte in das zweite Falzwalzenpaar 20, 22 eingezogen. Dabei wird die Falzkante 28 von dem Bogenanschlag 26 weg bewegt, so dass die voreilende Bogenkante 30 dem nachlaufenden Abschnitt 36 des Bogens in dem Bereich nach dem ersten Falzwalzenpaar 18, 20 näher kommt. In der in Fig. 3 gezeigten Stellung befindet sich die voreilende Bogenkante 30 kurz vor dem Auftreffen auf den nachlaufenden Abschnitt 36 des Bogens 12. Sobald die Falzkante 28 auf den Bogenanschlag 26 auftrifft, wird das erste Falzwalzenpaar 18, 20 möglichst beschleunigt, um in möglichst kurzer Zeit zusätzlich 1 bis 2 cm Bogen zu fördern. Anschließend werden die Falzwalzen 18, 20 wieder mit Normalgeschwindigkeit gedreht. Durch die Beschleunigung wird nach dem ersten Falzwalzenpaar 18, 20 eine Ausbauchung 34 gebildet, die das voreilende Ende 30 des Bogens nach unten in Richtung des Falzwalzenspaltes zwischen den Falzwalzen 20, 22 drückt. Hierdurch wird gewährleistet, dass die Bogenkante 30 ordnungsgemäß zwischen die Falzwalzen 20, 22 eingeführt wird, um ein ordentliches Falzergebnis zu erreichen.2 to 4 show the folding of a sheet 12 in the Taschenfalzwerk 10, at the formation of a folding section 31 already a fold was performed so that the leading end 30 of the sheet is at the level of the bow center. In the position shown in Fig. 2, the folded edge 28 is located immediately in front of the sheet stop 26. By a further drive of the first pair of folding rollers 18, 20 of the sheet 12 is compressed and fed along the fold line 32 in the middle of the sheet in the second pair of folding rollers 20, 22 , In this case, the folded edge 28 is moved away from the sheet stop 26, so that the leading sheet edge 30 comes closer to the trailing portion 36 of the sheet in the area after the first pair of folding rollers 18, 20. In the position shown in Fig. 3, the leading edge of the sheet 30 is just before hitting the trailing portion 36 of the sheet 12. As soon as the folded edge 28 impinges on the sheet stop 26, the first pair of folding rollers 18, 20 as possible accelerated as possible short time in addition to promote 1 to 2 cm bow. Subsequently, the folding rollers 18, 20 are rotated again at normal speed. As a result of the acceleration, after the first folding roller pair 18, 20, a bulge 34 is formed which presses the leading end 30 of the sheet downwards in the direction of the folding roller gap between the folding rollers 20, 22. This ensures that the sheet edge 30 is inserted properly between the folding rollers 20, 22 in order to achieve a decent folding result.

Claims (5)

  1. Buckle folder with at least one fold buckle (24) with an intake opening (25) and a sheet stop (26), wherein a first folding roller pair (18, 20) for transporting a sheet (12) into the fold buckle (24) and a second folding roller pair (20, 22) for transporting and folding the sheet (12) after the sheet (12) strikes the sheet stop (26) are disposed before the intake opening (25), characterised in that the transport speeds of the folding roller pairs (18, 20; 20, 22) can be adjusted independently of one another.
  2. Buckle folder according to Claim 1, characterised in that a driven folding roller (20) forms a folding roller both of the first folding roller pair (18, 20) and of the second folding roller pair (20, 22), wherein all the folding rollers are driven separately by a respective servomotor (SV1, SV2, SV3) or the folding rollers of the first folding roller pair (18, 20) are driven by a common servomotor (SV1) and the other folding roller of the second folding roller pair (20, 22) is driven by a separate servomotor (SV2).
  3. Buckle folder according to Claim 2, characterised in that the drives are formed by servomotors which are controlled by a control device.
  4. Method for folding a sheet by means of a pocket folder according to any one of Claims 1 to 3, characterised in that the transport speed of the first folding roller pair (18, 20) is reduced shortly before the leading sheet edge (30) strikes the sheet stop (26).
  5. Method for folding a sheet (12) which is folded at least about one fold line for forming a folded edge (28), with a buckle folder (10) according to either of Claims 2 and 3, in which the folded sheet (12) is firstly introduced through the first folding roller pair (18, 20) so far that the folded edge (28) strikes against the sheet stop (26), wherein the leading sheet edge (30) faces the first folding roller pair (18, 20), is then introduced along a second fold line (32) into the second folding roller pair (20, 22), wherein a trailing portion (36) of the sheet (12) is simultaneously transported through the first folding roller pair (18, 20), characterised in that the first folding roller pair (18, 20) is accelerated before the leading sheet edge (30) strikes the trailing portion (36) of the sheet (12).
EP20030010424 2003-05-08 2003-05-08 Buckling folder Expired - Fee Related EP1475333B8 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20030010424 EP1475333B8 (en) 2003-05-08 2003-05-08 Buckling folder
DE50306184T DE50306184D1 (en) 2003-05-08 2003-05-08 Bucklefolder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20030010424 EP1475333B8 (en) 2003-05-08 2003-05-08 Buckling folder

Publications (3)

Publication Number Publication Date
EP1475333A1 EP1475333A1 (en) 2004-11-10
EP1475333B1 true EP1475333B1 (en) 2007-01-03
EP1475333B8 EP1475333B8 (en) 2007-04-25

Family

ID=32981845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030010424 Expired - Fee Related EP1475333B8 (en) 2003-05-08 2003-05-08 Buckling folder

Country Status (2)

Country Link
EP (1) EP1475333B8 (en)
DE (1) DE50306184D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007302383A (en) * 2006-05-10 2007-11-22 Horizon International Inc Paper folding device
EP2660177B1 (en) * 2012-04-30 2016-03-23 Heidelberger Druckmaschinen AG Method for folding and buckle plate folding machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5967963A (en) * 1996-11-26 1999-10-19 Grapha-Holding Ag Apparatus for folding paper sheets

Also Published As

Publication number Publication date
EP1475333B8 (en) 2007-04-25
EP1475333A1 (en) 2004-11-10
DE50306184D1 (en) 2007-02-15

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