EP1995064B1 - Dispositif de guidage de feuilles dans des machines d'impression pour assister au transport des feuilles - Google Patents

Dispositif de guidage de feuilles dans des machines d'impression pour assister au transport des feuilles Download PDF

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Publication number
EP1995064B1
EP1995064B1 EP08164150A EP08164150A EP1995064B1 EP 1995064 B1 EP1995064 B1 EP 1995064B1 EP 08164150 A EP08164150 A EP 08164150A EP 08164150 A EP08164150 A EP 08164150A EP 1995064 B1 EP1995064 B1 EP 1995064B1
Authority
EP
European Patent Office
Prior art keywords
sheet
printing
guide device
cylinder
air box
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
Application number
EP08164150A
Other languages
German (de)
English (en)
Other versions
EP1995064A1 (fr
Inventor
Michael Koch
Michael Beyer
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer 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
Priority claimed from DE2000153106 external-priority patent/DE10053106A1/de
Priority claimed from DE2000153105 external-priority patent/DE10053105A1/de
Priority claimed from DE2000153104 external-priority patent/DE10053104A1/de
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1995064A1 publication Critical patent/EP1995064A1/fr
Application granted granted Critical
Publication of EP1995064B1 publication Critical patent/EP1995064B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F25/00—Devices for pressing sheets or webs against cylinders, e.g. for smoothing purposes

Definitions

  • the invention relates to a sheet guiding device in printing presses for supporting sheet guiding according to the preamble of claim 1.
  • Sheet guiding devices in printing machines have the task of acting on the sheet to be conveyed by the printing press in such a way that they can be moved through the printing press in a smear-free and wrinkle-free manner and deposited on the delivery pile.
  • Sheet guiding devices which are assigned to a printing cylinder, ensure that the sheet rests smoothly on the printing cylinder. It is generally known to use as sheet guiding devices blow boxes with pneumatic devices that hang up the sheet on the surface of the cylinder with their pressure force.
  • a disadvantage of this device are the complex nozzle design and the missing radiant component outside the minimum format width.
  • a sheet guiding device in a printing machine is known, arranged in the conveying direction of the printing material in the zwickelförmigen space in front of a pressure blank formed by blanket and forme cylinders and printing cylinder axially parallel to the cylinders and coupled to a pneumatic system and several chambers with openings for the Blas Kunststoffaustritt for placing the printing material exists on the associated lateral surface and in the conveying direction to the pressure gap towards tapered inlet gap having.
  • the chambers have rising in the conveying direction of the printing material, acting on the substrate printing energies (P 1 > P 2 > P 3 ) on.
  • this sheet guiding device which is designed as a box with individual chambers, the complex box design and the energy loss through the pressure reduction via throttling.
  • a pneumatic sheet guiding device on a curved switch is known, which is associated with a central pressure cylinder and a transfer drum adjacent thereto and has two of the contour of the printing cylinder and the transfer drum adapted, acted upon with blowing air guide surfaces. With the sheet guiding device two air cushions are simultaneously generated, which should place the sheet on the printing cylinder and the transfer drum or to keep on the lateral surfaces.
  • a disadvantage of these devices is further that from the area of the pressure gap of the contacting cylinder air can flow between the sheet guide and blanket cylinder. It may cause air currents that can under blow the bow end of the bow.
  • the sheet guiding device has the advantage that a sheet conveyed by the printing cylinder can be smoothly spread over the entire surface and placed on the lateral surface, so that it can be printed correctly in the printing nip and also properly conveyed by the printing cylinder.
  • the sheet is acted upon by the nozzles in the guide surface with blowing air; the blown air forces the bow to hang up on the pressure cylinder.
  • the guide gap is fed more continuously in the sheet conveying direction more compressed air, which then from the inside outwards and against the sheet conveying direction - additionally supported by a in Sheet conveying direction and axially to the machine center (transverse to the sheet conveying direction) converging gap - flows in the direction of the side edges and the trailing edge.
  • An increasing nozzle density in the guide surface is understood to mean that in the sheet conveying direction or according to a second variant in and across the sheet conveying direction from outside to inside, the proportion of the nozzle surface on the entire guide surface increases. This is achieved by a larger number of nozzles in the guide surface and / or larger nozzle openings.
  • an effective barrier pad between the blocking surface and the lateral surface of the blanket cylinder is constructed. It is advantageous to adapt the blocking surface of the air box to the contour of the lateral surface of the blanket cylinder.
  • the air emerging from the nozzles of the guide surface in the region of the pressure gap endeavors to escape from this region via the space between the blanket cylinder and the airbox.
  • the construction of the barrier pad, this air is prevented from flowing between the blanket cylinder and air box. As a result, the air flows between the guide surface and the sheet against the sheet conveying direction and thus deletes the sheet on the printing cylinder.
  • an air flow from the high-pressure barrier pad flows into the area in front of the nip, increases the air pressure in front of the nip, is deflected in this area and flows against the arc direction against the sheet travel direction through the guide gap with and increases the above described effect , This prevents underblowing in this area of the bow in the rear area.
  • the air box is simple in construction, since it consists of only a single chamber.
  • the nozzle design is simple by the flow from the inside to the outside over the increase of the nozzle density in the sheet conveying direction and formation of the guide gap.
  • the sheet guiding device is used in processing the entire range of materials from rigid to non-rigid materials.
  • the Bogenkantenleit is effective only when processing rigid materials.
  • the edge guide rollers are otherwise outside the format range.
  • the sheet After the sheet has passed the edge guide roller, it is transferred to the sheet guiding device.
  • the sheet guide through the guide surface of the air box is carried out by sliding along the sheet trailing edge on the guide surface, whereby a smearing of the sheet is avoided because the sheet touches the guide surface only with its trailing edge.
  • Fig. 1 shows a schematic representation in side view of two printing units 1 of a printing press. Shown are the printing, rubber and plate cylinders 2, 3, 4. Between the two printing cylinders 2, a sheet guiding cylinder 5 is arranged. In a printing unit 1, which is designed as a coating unit, the blanket cylinder 3 is designed as a paint form cylinder 3. Before and after the printing nip 7 of rubber and printing cylinder 3.2, a sheet guiding device 6 is arranged, which will be explained below with reference to the sheet guiding device 6 before the printing nip 7. The sheet guiding device 6 after the printing nip 7 is arranged in mirror image or approximately mirror image to the sheet guiding device 6 in front of the printing nip 7. The sheet conveying direction 8 results from the direction of rotation of the cylinder 2,5, which is indicated by the direction of rotation arrow.
  • Sheet guiding and impression cylinder 5.2 have the common tangent point t 2.5 .
  • Fig. 2 shows the sheet guiding device 6 in detail.
  • the sheet guiding device 6 is formed as an air box 9 extending over the sheet conveying path. It extends in the area above the tangent point t 2.5 from the sheet guiding cylinder 5 to near the printing nip 7 of printing and blanket cylinder 2;
  • the air box 9 is pivotally mounted on the machine frame 15. Lead to the air box 9 pneumatic air supply systems 16, which are formed in the embodiment as fans 16.
  • Towards the arc of the air box 9 is provided with a guide surface 11 which converges near the pressure gap 7 with a contour of the blanket cylinder 3 adapted blocking surface 10 of the air box 9 at the beginning of the air box 9, where in the air box 9 in the direction of pressure gap 7 facing outlet opening 13th is introduced.
  • the adaptation of the blocking surface 10 to the contour of the blanket cylinder 3 is advantageous, but not a condition for the construction of a barrier pad.
  • the guide surface 11 forms with the lateral surface of the printing cylinder 2, the guide gap 17.
  • the guide gap 17 can converge to the impression cylinder 2 or diverge or run parallel.
  • the air box 9 is pivoted in such a way that the guide gap 17 converges. (Sh. Fig.2 ).
  • the blocking surface 10 is provided with at least one row of nozzles 14 (in Fig. 2 There are 5 rows of nozzles).
  • the nozzle row 14 extends over the width of the blocking surface 10.
  • the blown air jet, which can be blown out of the nozzle row 14, is directed against the lateral surface of the blanket cylinder 3.
  • the blocking surface 10 of the air box 9 has the outer surface of the blanket cylinder 3 at a distance S.
  • nozzle rows 14 Essential for the number of nozzle rows 14 is that an effective barrier pad is constructed against the discharge and uncontrolled air. For the promising effect, it is not absolutely necessary that nozzle rows 14 are present. It is essential that a barrier pad is constructed, wherein the air can also be blown over the width of the blocking surface 10 asymmetrically arranged individual nozzles.
  • the length L of the blocking surface 10 is essential for the construction of the barrier pad. The larger the blocking surface 10, the more effective the built-up barrier pad. The length L of the blocking surface 10 is greater than the distance S.
  • Fig. 3 shows a view towards B according to Fig. 2 on the guide surface 11.
  • the guide surface 11 is provided over the entire surface with nozzles 12 which blow vertically from the guide surface 11.
  • the nozzle density in the sheet conveying direction 8 (FIG. Fig. 3 ) or according to another variant in sheet conveying direction 8 and from outside to inside ( Fig. 4 ).
  • Fig. 5 shows a view of the air box 9 in the direction A according to another variant Fig. 2 , It can be seen that the guide surface 11 from the outside (on both sides) inwardly to the surface of the printing cylinder 2 has a converging distance. For simplicity, the nozzles 12 in the guide plate in Fig. 5 not shown.
  • the operation of the sheet guiding device 6 is the following:
  • the air box 9 fulfills the function of a pressure accumulator.
  • the air emerging from the nozzles 12 forms an air cushion and thus acts on the guided under the guide surface 11 sheet and forces it on the printing cylinder 2.
  • the sheet is thereby struck from front to back and possibly additionally from the center to the outside.
  • the barrier pad avoids both the subsequent flow of air from the guide gap 17 in the direction of the pressure gap 7, as well as the outflow of air from the region of the pressure gap. 7
  • the air blown out of the outlet opening 13 in the direction of the pressure gap 7 against the blanket cylinder 3 is deflected by the latter in the direction of the printing cylinder 2 and sweeps the sheet immediately before the printing gap 7 in a region in which the air can no longer act from the guide surface 11.
  • the sheet guiding device 6 can also be used when the printing unit 1 is used as a coating unit or is not involved in the printing. If it is not involved in the pressure, have rubber and printing cylinder 2.3 in the printing gap 7 at a distance from each other.
  • the construction of a barrier pad by a blocking surface 10 with rows of nozzles 14, which are directed against a blanket cylinder 3 is not limited to the application described before the printing gap 7 of rubber and printing cylinder 2.3.
  • the sheet guiding device 6 for the construction of a barrier pad after the printing nip 7.
  • the construction of a barrier pad is everywhere useful where the bowing is supported by air and at or near the point of action nachf beaude air reduces the promising effect. In this case, the construction of a barrier pad is useful because it increases the effect of air blown directly on the bow.
  • Fig. 6 and Fig. 8 show the sheet guiding device 6 for rigid substrates in more detail.
  • the Bogenkantenleit driving 22 consists of a rotatably mounted on a holder 18 Kantenleitrolle 19th
  • the edge guide roller 19 is assigned via the holder 18 at an angle to the impression cylinder 2 and thus the side edge of the sheet 21.
  • the holder 18 is fixedly mounted on a guide 20 and slidable along it (see also Fig. 8 ).
  • the arrangement of the sheet guiding device 6 and its function in processing of rigid materials shows Fig. 6 ,
  • the edge guide roller 19 is associated with the side edge of the sheet 21 and the air box 9 is pivoted on the machine frame 15, that between the guide surface 11 and the periphery of the impression cylinder 2 is preferably a divergent gap.
  • the rigid materials (bows) 21 conveyed by the printing press first come into contact with the edge-guiding rollers 19 arranged on both sides in their rear region.
  • the edge guide rollers 19 support the side edge of the sheet 21, so that the sheet trailing edge is guided over the entire width at a distance below the guide surface 11.
  • the trailing edge of the sheet 21 After the sheet 21 has left the effective range of the edge guide rollers 19, it moves due to its bending stress to the outside and lies down with the trailing edge of the guide surface 11 at. After the trailing edge of the sheet 21 has passed the end of the guide surface 11, the trailing edge of the common tangent follows between impression cylinder 2 and blanket cylinder 3.
  • the air box 9 can be pressurized pneumatically.
  • the air emerging from the nozzles 12 of the guide surface 11 acts on the sheet 21 in the direction of the impression cylinder 2.
  • the edge guide roller 19 is placed outside of the sheet format to be processed.
  • the air box 9 is previously applied pneumatically by the fans 16.
  • the air box 9 was previously pivoted to the machine frame 15 such that a convergent gap is formed between the guide surface 11 and the periphery of the printing cylinder 2 in the sheet conveying direction 8.
  • the air emerging from the nozzles 12 acts on the sheet 21 and forces it onto the printing cylinder 2.
  • the sheet 21 is thereby streaked and runs wrinkle-free and without greasing into the printing gap 7 of printing press. and blanket cylinders 2, 3. A contact of the sheet 21 with the guide surface 11 does not take place.

Landscapes

  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (10)

  1. Dispositif de guidage de feuilles (6) dans des machines à imprimer pour assister le transport des feuilles dans la zone d'une fente d'impression (7) entre un cylindre d'impression (2) et un cylindre de mise en forme (3) en caoutchouc ou en vernis, constitué par une caisse à air (9) s'étendant sur la largeur de la voie de transport des feuilles, et reliée à un système d'alimentation en air (9), cette caisse à air (9) comportant une surface de guidage (11) équipée de buses (12) dirigées sur la voie de transport des feuilles, et la surface de guidage (11) étant située à distance de la surface enveloppe du cylindre d'impression (2),
    caractérisé en ce que
    la caisse à air (9) comporte une surface de blocage (10) équipée de buses située à distance et dirigée vers le cylindre de mise en forme (3) en caoutchouc ou en vernis, d'où sort de l'air de soufflage pour produire un coussinet d'air de blocage en direction du cylindre de mise en forme (3) en caoutchouc ou en vernis, et la surface de blocage (12) de la caisse à air (9) est adaptée au contour du cylindre de mise en forme (3) en caoutchouc ou en vernis.
  2. Dispositif de guidage de feuilles (6) conforme à la revendication 1, dans lequel la surface de blocage (10) est équipée d'au moins une rangée de buses (14).
  3. Dispositif de guidage de feuilles (6) conforme à la revendication 1, dans lequel la surface de blocage (10) comporte des buses individuelles réparties de manière asymétrique sur sa largeur.
  4. Dispositif de guidage de feuilles (6) conforme à la revendication 1, dans lequel la longueur (L) de la surface de blocage (10) est supérieure à la distance (S) entre la caisse à air (9) et la surface enveloppe du cylindre de mise en forme (3) en caoutchouc ou en vernis.
  5. Dispositif de guidage de feuilles (6) conforme à la revendication 1, monté en amont et en aval de la fente d'impression (7).
  6. Dispositif de guidage de feuilles (6) conforme à la revendication 1,
    caractérisé par
    la combinaison d'un dispositif de guidage (22) des bords des feuilles monté en amont et commutable sélectivement et de rouleaux de guidage de bords (19) réglables sur les bords latéraux d'une feuille (21).
  7. Dispositif de guidage de feuilles (6) conforme à la revendication 6, dans lequel le dispositif de guidage des bords des feuilles (22) comporte des rouleaux de guidage de bords (19) ajustables en dehors du format des feuilles à traiter.
  8. Dispositif de guidage de feuilles (6) conforme à la revendication 1 ou 6, dans lequel la caisse à air (9) est montée pivotante sur le châssis de la machine (15).
  9. Dispositif de guidage de feuilles (6) conforme à la revendication 8, dans lequel la surface de guidage (11) de la caisse à air (9) forme une fente divergente avec le cylindre d'impression (2) pour permettre de traiter des matériaux résistant à la flexion dans la direction de transport des feuilles (8).
  10. Dispositif de guidage de feuilles (6) conforme à la revendication 1 ou 8, dans lequel la surface de guidage (11) de la caisse à air (9) forme une fente convergente avec le cylindre d'impression (2) pour permettre de traiter des matériaux mous à la flexion dans la direction de transport des feuilles (8).
EP08164150A 2000-10-26 2001-10-23 Dispositif de guidage de feuilles dans des machines d'impression pour assister au transport des feuilles Expired - Lifetime EP1995064B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2000153106 DE10053106A1 (de) 2000-10-26 2000-10-26 Bogenglätteinrichtung in Druckmaschinen zur Unterstützung der Bogenführung
DE2000153105 DE10053105A1 (de) 2000-10-26 2000-10-26 Leiteinrichtung in Druckmaschinen
DE2000153104 DE10053104A1 (de) 2000-10-26 2000-10-26 Bogenglätteinrichtung in Druckmaschinen zur Unterstützung der Bogenführung
EP20010125107 EP1201428B1 (fr) 2000-10-26 2001-10-23 Dispositif de guidage de feuilles dans des machines d'impression pour assister au transport des feuilles

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP20010125107 Division EP1201428B1 (fr) 2000-10-26 2001-10-23 Dispositif de guidage de feuilles dans des machines d'impression pour assister au transport des feuilles
EP01125107.1 Division 2001-10-23

Publications (2)

Publication Number Publication Date
EP1995064A1 EP1995064A1 (fr) 2008-11-26
EP1995064B1 true EP1995064B1 (fr) 2012-12-12

Family

ID=27214131

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08164150A Expired - Lifetime EP1995064B1 (fr) 2000-10-26 2001-10-23 Dispositif de guidage de feuilles dans des machines d'impression pour assister au transport des feuilles
EP20010125107 Expired - Lifetime EP1201428B1 (fr) 2000-10-26 2001-10-23 Dispositif de guidage de feuilles dans des machines d'impression pour assister au transport des feuilles

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20010125107 Expired - Lifetime EP1201428B1 (fr) 2000-10-26 2001-10-23 Dispositif de guidage de feuilles dans des machines d'impression pour assister au transport des feuilles

Country Status (2)

Country Link
EP (2) EP1995064B1 (fr)
DE (1) DE50115825D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013209699B4 (de) 2012-05-24 2020-08-27 Koenig & Bauer Ag Bogenführungseinrichtung für eine bogenverarbeitende Maschine
CN108537949B (zh) * 2018-04-15 2024-08-02 浙江师范大学 全自动双面展平纸币整理机
JP3224349U (ja) * 2018-10-29 2019-12-12 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフトＨｅｉｄｅｌｂｅｒｇｅｒ Ｄｒｕｃｋｍａｓｃｈｉｎｅｎ ＡＧ 印刷ニップの手前にブロー装置を有する印刷機

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2156577B2 (de) * 1971-11-15 1974-07-04 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Vorgreiferschwinganlage
DE2603483B2 (de) * 1976-01-30 1978-06-08 Reinhard Mohn Ohg, 4830 Guetersloh Verfahren zum Führen eines Bogens zum gleichzeitigen Bedrucken mit einem Schön- und Widerdruck sowie Vorrichtung zur Durchführung des Verfahrens
GB2190364A (en) * 1986-05-14 1987-11-18 Wallace Knight Ltd An assembly for preventing the detachment of a substrate from a revolving cylinder
JP3210015B2 (ja) * 1991-08-16 2001-09-17 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト 印刷機の排紙装置範囲に設けられた個々の調整エレメントのコントロールおよび／または制御のための装置
DE9115032U1 (de) * 1991-12-04 1992-01-16 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogenausleger an Druckmaschinen
DE4443493C2 (de) * 1994-12-07 2002-06-06 Koenig & Bauer Ag Leiteinrichtung für biegesteife Materialien
DE19523076C5 (de) 1995-06-24 2007-05-16 Heidelberger Druckmasch Ag Vorrichtung zur Erzielung einer einwandfreien Auflage eines Bedruckstoffs in einer Druckmaschine
DE19723146C2 (de) * 1997-06-03 1999-11-18 Koenig & Bauer Ag Bogenweiche zur Unterstützung der Bogenführung
DE19753089C2 (de) * 1997-11-29 2000-06-29 Roland Man Druckmasch Bogenführungseinrichtung in einer Druckmaschine
DE29721185U1 (de) * 1997-11-29 1998-01-15 MAN Roland Druckmaschinen AG, 63075 Offenbach Bogenführungseinrichtung in einer Druckmaschine

Also Published As

Publication number Publication date
EP1995064A1 (fr) 2008-11-26
DE50115825D1 (de) 2011-05-05
EP1201428A3 (fr) 2007-04-18
EP1201428A2 (fr) 2002-05-02
EP1201428B1 (fr) 2011-03-23

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