EP2271564A2 - Device for conveying a flat substrate, comprising a cleaning device, and corresponding cutting device, printing press, and use of said device - Google Patents

Device for conveying a flat substrate, comprising a cleaning device, and corresponding cutting device, printing press, and use of said device

Info

Publication number
EP2271564A2
EP2271564A2 EP09746012A EP09746012A EP2271564A2 EP 2271564 A2 EP2271564 A2 EP 2271564A2 EP 09746012 A EP09746012 A EP 09746012A EP 09746012 A EP09746012 A EP 09746012A EP 2271564 A2 EP2271564 A2 EP 2271564A2
Authority
EP
European Patent Office
Prior art keywords
conveying
cleaning
cutting
angular range
sheet
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.)
Granted
Application number
EP09746012A
Other languages
German (de)
French (fr)
Other versions
EP2271564B1 (en
Inventor
Nicolas Rousseau
Christophe Noiret
François POIRET
Eric Pierda
Detlef Milkereit
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.)
Vits Print GmbH
Goss International Montataire SA
Original Assignee
Vits Print GmbH
Goss International Montataire SA
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 Vits Print GmbH, Goss International Montataire SA filed Critical Vits Print GmbH
Publication of EP2271564A2 publication Critical patent/EP2271564A2/en
Application granted granted Critical
Publication of EP2271564B1 publication Critical patent/EP2271564B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/241—Suction devices
    • B65H29/243—Suction rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/007—Cleaning arrangements or devices for supports of workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/12—Advancing webs by suction roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4212—Forming a pile of articles substantially horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/53—Auxiliary process performed during handling process for acting on performance of handling machine
    • B65H2301/531—Cleaning parts of handling machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means

Definitions

  • the present invention relates to a device for conveying a flat substrate, such as a sheet or a strip, of the type comprising:
  • a transport roller adapted to convey a flat substrate to be transported, the transport roller having a transport surface which is in contact with the flat substrate during transport and which is provided with a plurality of recesses;
  • a vacuum device adapted to create a depression in the plurality of recesses.
  • These conveying devices comprise hollow transport rollers having a transport surface in contact with the sheet to be transported.
  • the latter comprises recesses connected to a device for creating a vacuum.
  • the printed sheet leads to ink deposition on the transport surface, and results in poor production quality.
  • the present invention aims to improve the quality of printed products that can be produced by the printing machine, and this with simple means.
  • the subject of the invention is a conveying device of the type indicated, characterized in that it comprises a device for cleaning the transport surface.
  • the routing device comprises one or more of the following features:
  • the cleaning device comprises an application device adapted to apply cleaning liquid to the transport surface
  • the cleaning device comprises a reservoir containing cleaning liquid, and a pipe adapted to bring this cleaning liquid to the application device;
  • the cleaning liquid is a repellent liquid of the ink, in particular a silicone and water emulsion;
  • the cleaning liquid is washing liquid, preferably an ink solvent
  • the cleaning device comprises a wiper adapted to remove washing liquid from the transport surface
  • the wiper device is disposed downstream of the washing liquid application device, seen in the driving direction of the transport roller;
  • the conveying device defines a vacuum chamber extending over a first angular range around the axis of rotation of the transport roller, this first angular range extending for less than 360 °;
  • the vacuum device is connected to the vacuum chamber and adapted to create a vacuum in the recesses located exclusively in the first angular range;
  • the routing device defines an ambient chamber extending over a second angular range, the recesses in the second angular range being subjected to ambient pressure;
  • the cleaning device cooperates with the transport surface inside the second angular range
  • the conveying device defines a pressure chamber extending over a third angular range around the axis of rotation and comprises a pressure device connected to the pressure chamber and adapted to create an overpressure in the recesses located exclusively within the third angular range;
  • the transport roller is either an inlet roller or a back pressure cylinder, a transfer roller or a brake roller.
  • the invention furthermore relates to a device for cutting a sheet strip of the type comprising:
  • a cutting cylinder provided with a blade
  • a counter-pressure cylinder cooperating with the cutting cylinder, these cylinders being adapted to cut a strip of flat sheet substrate;
  • the first routing device is a device according to any one of the preceding claims, including a transfer device.
  • the cutting device comprises a second sheet conveying device disposed downstream of the first sheet conveying device, and the second conveying device is a device of the aforementioned type, in particular a device braking.
  • the invention also relates to a rotary printing press, of the type comprising: a unwinder of a tape to be printed,
  • a cutting device of the printed sheet tape wherein the cutting device is a cutting device of the aforementioned type.
  • the invention also relates to a use of a routing device of the aforementioned type, comprising the following steps:
  • FIG. 1 is a diagrammatic side view of a machine for printing according to the invention
  • FIG. 2 is a view corresponding to the view of FIG. 1 of a variant of a printing machine according to the invention
  • FIG. 3 is a schematic view of the cutting device and stacking according to a first embodiment
  • Figure 4 is a schematic view corresponding to the view of Figure 3, a second embodiment of the cutting device and stacking according to the invention.
  • Figure 1 is shown a rotary printing machine according to the invention, designated by the general reference 2.
  • the printing machine 2 comprises a unwinder 4, four printing units 6, a traction device 8 and a cutting and stacking device 10.
  • the printing machine 2 further comprises a tape gripper 14 and a dusting device 16.
  • the printing machine 2 could comprise any number of printing units 6, in theory, from one to n.
  • the unwinder 4 is adapted to unwind a continuous print tape 18.
  • the print tape 18 is a coated paper web.
  • Coated paper is a paper that includes a coating layer, for example of kaolin or chalk, improving the mechanical or optical properties of the paper. This paper makes it possible to obtain a printed product of high quality.
  • the tape to be printed is an uncoated paper tape.
  • the printing machine 2 defines a print path of the web 18 between the unwinder 4, through the printing units 6, the web gripper 14, the dusting device 16, and the pulling device 8 , up to the cutting and stacking device 10.
  • Each printing unit 6 comprises an inking device 20 which is provided with an ink tank 22 comprising ink 24 intended for printing on a strip of paper 18.
  • the ink 24 used in the context of the The invention will be explained below.
  • Each ink device 20 further comprises an ink transfer roller 26 for transferring ink 24 to printing rollers 28 (see below).
  • the printing units 6 comprise printing rollers 28 which are adapted to print on the paper web 18.
  • the cutter and stacker 10 is adapted to cut the print tape 18 into individual sheets 30 and to produce a stack 31 of the cut individual sheets.
  • the traction device 8 is situated downstream of the printing unit 6 furthest upstream and upstream of the cutting and stacking device 10. This traction device 8 is adapted to apply a determined mechanical tension on the strip 18 exiting the printing unit 6 further downstream.
  • the printing machine 2 is adapted to transport the printed web 18 in free suspension and in ambient air all the way between the printing unit 6 furthest downstream and the traction device 8, possibly with the exception of the tape gripper 14 and the powdering device 16.
  • the printing machine 2 is also adapted to transport the printed tape 18 to the ambient air over the entire path between the traction device 8 and the cutting and stacking device 10.
  • the printing machine 2 of Figure 1 does not have a dryer and has a small footprint.
  • the printing machine 2 according to the variant shown in FIG. 2 differs from the printing machine 2 shown in FIG. 1 by the fact that between the belt gripper 14 and the traction device 8 is arranged a dryer
  • the infra-red dryer 32 may be replaced by another strip-drying device, such as a hot-air dryer.
  • the dryer 32 has reduced dimensions compared with the prior art driers.
  • the tape gripper 14 is adapted to detect a break in the paper web 18 and to grip the free end of the paper web 18 in this case.
  • the tape gripper 14 has appropriate gripping elements 34.
  • the tape gripper 14 is omitted.
  • the powdering device 16 is adapted to deposit anti-staining powder on each of the faces of the printed strip 18. It can deposit anti-staining powder on one or both sides of the printed strip 18.
  • the dusting device 16 comprises a reservoir 36 containing powder 38 and a dusting head 40 connected to the powder reservoir 36 via a pipe 42 for each of the faces of the paper strip 18.
  • the powdering device 16 is adapted to apply the anti-maculante powder to the paper web 18 continuously, preferably continuously continuously over a length which corresponds to at least twice the printing length.
  • the anti-maculante powder 38 used for the powdering of the strip is preferably a vegetable powder, for example based on corn, or a mineral powder.
  • the traction device 8, associated with the other units of the press, makes it possible to print a strip of paper and to receive it in the cutting and stacking device 10, without drying this strip of paper 12 and by evaporation of the solvents of ink.
  • the image is printed by the ink 24 contained in the ink tank 22.
  • the ink 24 is a drying ink, or a waterless ink ("waterless”), or a two-component ink.
  • the drying of drying inks is the combination of a first phenomenon called “penetration into the support” and a second phenomenon called “the oxidation polymerization of varnishes consisting of oils and resins”.
  • the waterless inks are used with specific printing plates to define non-printing areas without using the conventional lithographic process based on the rejection of the greasy ink by a previously moistened hydrophilic surface.
  • the use of these inks can be considered in the same way as the conventional drying inks previously seen and can be dispensed with a dryer, or design less cumbersome.
  • Heat-set inks dry by evaporation of the mineral solvents mixed with the resin.
  • the UV inks dry by polymerization of the resin under the effect of ultraviolet radiation.
  • FIG. 3 diagrammatically shows the cutting and stacking device 10.
  • the cutting and stacking device 10 has two sheet feeding devices 30 to the stack, namely a first conveying device D1 or transfer and a second conveying device D2 or braking.
  • the cutting and stacking device comprises two input rollers 50, a cutting cylinder 52, a back pressure cylinder 54, a transfer roller 56 and a braking roller 58.
  • the cutting device 10 defines a path T of the paper web 18 and sheets 30 extending from the inlet of this device 10 successively on the input rollers 50, the back pressure cylinder 54, the transfer roller 56, the brake roller 58 to stack 31 of individual sheets 30.
  • the cutting and stacking device 10 comprises a fixed structure S or frame.
  • the input rollers 50 are arranged on the path of the paper web
  • the two input rollers 50 are rotatable about an axis A and B relative to the fixed structure S.
  • Each of the input rollers 50 has an envelope 60 having through holes 62.
  • the cutting and stacking device 10 further comprises a vacuum device 64 adapted to create a depression in the holes 62 on a portion of the circumference of the input roller 50 concerned.
  • the cutting cylinder 52 is rotatable relative to the fixed structure S about an axis of rotation _.
  • the cutting cylinder 52 has a blade 66 adapted to cut sheets 30 of the paper web 18.
  • the counter-pressure cylinder 54 is disposed adjacent to the cutting cylinder 52 and is rotatable relative to the fixed structure S about an axis of rotation D.
  • the back-pressure cylinder 54 is provided for example with two blocks against back pressure 68 regularly distributed over the circumference of the counter-pressure cylinder 54. These counter-pressure blocks 68 cooperate with the blade 66 in order to cut the strip 18 into sheets 30.
  • the counter-pressure cylinder 68 pressure 54 comprises an envelope 70 provided with through holes 72.
  • the envelope 70 is a hollow cylinder with a circular section.
  • the inner portion of the envelope 70 is connected to the vacuum device 64.
  • a vacuum or vacuum can be created on an angular portion of the circumference of the envelope 70 which corresponds to the path T of the tape. This makes it possible to hold the paper strip 18 against the backpressure cylinder 54.
  • the first conveying device D1 is adapted to take a printed sheet 30, which has just been cut by the back pressure cylinder 54 and the cutting cylinder 52 and to route it along part of the path T.
  • the first routing device D1 includes the transfer roller
  • the transfer roller 56 is provided with an envelope 80.
  • the envelope 80 is rotatable about an axis of rotation E with respect to the structure S.
  • the envelope 80 is driven in a direction of rotation R1, which is counterclockwise in the figures.
  • the casing 80 is cylindrical in shape with a hollow circular section, and defines a conveying surface 82 adapted to be in contact with the sheet 30 for the purpose of conveying it.
  • the envelope 80 is provided with a plurality of through holes 84 extending radially with respect to the axis of rotation E and opening onto the transport surface 82.
  • the first conveying device D1 comprises a fixed wall 85 with respect to the structure S.
  • This fixed wall 85 is disposed inside the casing 80 and defines a vacuum chamber 86 extending over a first angular range ⁇ .
  • This first angular range ⁇ extends over less than
  • the vacuum chamber 86 is connected to the vacuum device 64.
  • the first conveying device D1 is adapted to create a depression in the holes 84 located exclusively in the portion of the circumference of the envelope 80 corresponding to the first range. angular ⁇ .
  • the fixed wall 85 delimits an ambient chamber 88 extending over a second angular range ⁇ about the axis of rotation E_.
  • the holes 84 of the envelope 80 are subjected to the ambient pressure on the part of the circumference of the transport surface 82 corresponding to this second angular range.
  • This second range extends about 160 ° around the axis of rotation E.
  • the fixed wall 85 also defines a pressure chamber 90 extending over a third angular range y about the axis of rotation E.
  • the overpressure chamber 90 extends over approximately 20 °. It is connected to an overpressure device 92 adapted to create an overpressure in the holes 84 located exclusively within the third angular range.
  • the first angular range ⁇ coincides with the portion of the path T associated with the transfer roller 56.
  • the third angular range is opposite the braking roller 58 and is adapted to push the sheet 30 towards this braking roller 58.
  • the routing device D2 comprises the braking roller 58.
  • the braking roller 58 is provided with a cylindrical envelope 100 with a hollow circular section which delimits a transport surface 102.
  • the envelope 100 is rotatable about an axis of rotation F with respect to the structure S.
  • the envelope 100 is driven in a drive direction R2 which is the opposite direction of the direction R1.
  • the envelope 100 is provided with a plurality of holes 104 passing through this envelope 100 and opening onto the transport surface 102.
  • the second routing device D2 comprises a fixed wall 105 with respect to the structure S.
  • This fixed wall 105 is disposed inside the casing 100 and delimits a vacuum chamber 106 extending over a first angular range ⁇ about the axis of rotation F.
  • This first angular range ⁇ extends about 90 ° from the chamber overpressure 90 in the direction of rotation R2.
  • the routing device D2 also delimits an ambient chamber
  • the second routing device D2 is adapted to take a sheet 30 of the transfer roller 56 and to brake it and then to deposit it on the stack 31 of the sheets.
  • each of the first D1 and second D2 routing devices includes a cleaning device 120 of the associated transport surface 82, 102. In the following one of the cleaning devices 120 will be described.
  • the cleaning device 120 is an application device adapted to apply cleaning liquid to the transport surface 82 and 102.
  • the cleaning device 120 comprises a reservoir 124 containing liquid cleaning 126 and a pipe 128 adapted to bring the cleaning liquid 126 to the application device 122.
  • the cleaning liquid 126 is a repellent liquid of the ink, for example a silicone emulsion and water.
  • the application device 122 is in contact with the transport surface 82, 102 at an angular position located inside the second angular range ⁇ , ⁇ which is associated with the ambient chamber 88, 108. the cleaning liquid is not sucked into the holes 84 or ejected through the holes 84.
  • the applicator device 122 comprises, for example, a fabric which is wetted by the liquid 126.
  • the cutting device 10 of the first embodiment is therefore devoid of a device for wiping the cleaning liquid 126.
  • the cutting device 10 comprises third D3, fourth D4 and fifth D5 routing devices.
  • the third D3 and the fourth D4 conveying devices are conveyors of the paper web 18 and each comprise an input roll 50.
  • Each of the third D3 and fourth D4 conveying devices comprises a delivery device. cleaning 120, identical to that described with reference to the first routing device D1. This cleaning device 120 is adapted to clean the transport surface of the rollers 50.
  • the fifth conveying device D5 comprises the backing cylinder 54 and a cleaning device 120, identical to that described with reference to the first routing device D1.
  • This cleaning device 120 is adapted to clean the transport surface of the countercut cylinder 54.
  • FIG 4 is shown a cutting device 10 according to a second embodiment of the invention, which differs from the embodiment previously described by the following. Similar elements bear the same references.
  • the cleaning liquid 126 for the washing liquid is, for example, an ink solvent based on hydrocarbons.
  • the cleaning device 120 further comprises a wiper device 130 adapted to remove washing liquid from the transport surface 82, 102.
  • the wiper device 130 is disposed downstream of the washing liquid application device 122 in the driving direction of the transfer roller 56 or the braking roller 58.
  • the transport surface 82, 102 is clean when a sheet 30 is deposited on each of the transfer rollers 56, and braking 58 and the print quality is increased.
  • the paper web 18 is printed by the printing units 6, the printed paper web 18 enters the cutting device 10.
  • the paper web 18 is cut into sheets 30 by the cutting cylinders 52 and back pressure 54 and the sheets 30 are supplied to the first conveying device D1.
  • a vacuum or a depression is created in each of the holes 84, 104 located in the first angular range ⁇ , ⁇ .
  • the sheet 30 is conveyed on the conveying surface 82, and is then blown towards the transport surface 102 by the overpressure chamber 90.
  • the sheet 30 is braked by the braking roller 58 and disposed on the stack 31.
  • the cleaning liquid 126 is applied continuously to a portion of the transport surface 82, 102 while another portion of this transport surface 82, 102 carries a sheet 30.
  • the cleaning liquid 126 is applied on this part of the transport surface.
  • the cleaning device can be used to clean the transport surface of any type of transport cylinder of a flat substrate, such as a sheet or web.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Advancing Webs (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Abstract

The invention relates to a sheet (30) conveying device (D1, D2) comprising a transport roll (56, 58) for conveying a flat substrate (18, 30), said transport roll having a transport surface (82, 102) which comes into contact with the flat substrate and has a plurality of recesses (84, 104), and a vacuum device (64) for creating a depression in the plurality of recesses. The device also comprises a device (120) for cleaning the transport surface (82, 102). The invention is applicable to devices for ejecting sheets from printing presses.

Description

Dispositif d'acheminement d'un substrat plat à dispositif de nettoyage, dispositif de coupe, presse d'impression et utilisation correspondants. Device for conveying a flat substrate with cleaning device, cutting device, printing press and corresponding use.
La présente invention concerne un dispositif d'acheminement d'un substrat plat, tel qu'une feuille ou une bande, du type comprenant :The present invention relates to a device for conveying a flat substrate, such as a sheet or a strip, of the type comprising:
- un rouleau de transport adapté pour acheminer un substrat plat à transporter, le rouleau de transport ayant une surface de transport qui est en contact avec le substrat plat pendant le transport et qui est munie d'une pluralité d'évidements ; eta transport roller adapted to convey a flat substrate to be transported, the transport roller having a transport surface which is in contact with the flat substrate during transport and which is provided with a plurality of recesses; and
- un dispositif de vide adapté pour créer une dépression dans la pluralité d'évidements.a vacuum device adapted to create a depression in the plurality of recesses.
On connaît dans l'état de la technique des dispositifs d'acheminement de produits imprimés tels que des feuilles de papier. Ces dispositifs d'acheminement sont par exemple utilisés dans des machines d'impression offset afin de transporter les feuilles imprimées.Known devices for conveying printed products such as sheets of paper are known in the state of the art. These routing devices are for example used in offset printing machines to transport the printed sheets.
Ces dispositifs d'acheminement comprennent des rouleaux de transport creux ayant une surface de transport en contact avec la feuille à transporter. Afin de faire adhérer la feuille sur le rouleau de transport, celui-ci comporte des évidements reliés à un dispositif de création d'un vide.These conveying devices comprise hollow transport rollers having a transport surface in contact with the sheet to be transported. In order to adhere the sheet on the transport roll, the latter comprises recesses connected to a device for creating a vacuum.
Toutefois, la feuille imprimée conduit au dépôt d'encre sur la surface de transport, et résulte en une mauvaise qualité de production.However, the printed sheet leads to ink deposition on the transport surface, and results in poor production quality.
La présente invention a pour but d'améliorer la qualité des produits imprimés pouvant être produits par la machine d'impression, et ceci avec des moyens simples.The present invention aims to improve the quality of printed products that can be produced by the printing machine, and this with simple means.
A cet effet, l'invention a pour objet un dispositif d'acheminement du type indiqué, caractérisé en ce qu'il comprend un dispositif de nettoyage de la surface de transport. Selon les modes de réalisation particuliers, le dispositif d'acheminement comporte l'une ou plusieurs des caractéristiques suivantes :For this purpose, the subject of the invention is a conveying device of the type indicated, characterized in that it comprises a device for cleaning the transport surface. According to the particular embodiments, the routing device comprises one or more of the following features:
- le dispositif de nettoyage comprend un dispositif d'application adapté pour appliquer du liquide de nettoyage sur la surface de transport ;the cleaning device comprises an application device adapted to apply cleaning liquid to the transport surface;
- le dispositif de nettoyage comprend un réservoir contenant du liquide de nettoyage, et une conduite adaptée pour amener ce liquide de nettoyage au dispositif d'application ; - le liquide de nettoyage est du liquide repoussant de l'encre, notamment une émulsion de silicone et d'eau ;the cleaning device comprises a reservoir containing cleaning liquid, and a pipe adapted to bring this cleaning liquid to the application device; the cleaning liquid is a repellent liquid of the ink, in particular a silicone and water emulsion;
- le liquide de nettoyage est du liquide de lavage, de préférence un solvant d'encre, et le dispositif de nettoyage comprend un dispositif d'essuyage adapté pour retirer du liquide de lavage de la surface de transport ;the cleaning liquid is washing liquid, preferably an ink solvent, and the cleaning device comprises a wiper adapted to remove washing liquid from the transport surface;
- le dispositif d'essuyage est disposé en aval du dispositif d'application du liquide de lavage, vu dans le sens d'entraînement du rouleau de transport ;- The wiper device is disposed downstream of the washing liquid application device, seen in the driving direction of the transport roller;
- le dispositif d'acheminement définit une chambre de dépression s'étendant sur une première plage angulaire autour de l'axe de rotation du rouleau de transport, cette première plage angulaire s'étendant sur moins de 360°;the conveying device defines a vacuum chamber extending over a first angular range around the axis of rotation of the transport roller, this first angular range extending for less than 360 °;
- le dispositif de vide est relié à la chambre de dépression et adapté pour créer une dépression dans les évidements se trouvant exclusivement dans la première plage angulaire ;- The vacuum device is connected to the vacuum chamber and adapted to create a vacuum in the recesses located exclusively in the first angular range;
- le dispositif d'acheminement définit une chambre ambiante s'étendant sur une deuxième plage angulaire, les évidements se trouvant dans la deuxième plage angulaire étant soumis à la pression ambiante ;the routing device defines an ambient chamber extending over a second angular range, the recesses in the second angular range being subjected to ambient pressure;
- le dispositif de nettoyage coopère avec la surface de transport à l'intérieur de la deuxième plage angulaire ;the cleaning device cooperates with the transport surface inside the second angular range;
- le dispositif d'acheminement définit une chambre de surpression s'étendant sur une troisième plage angulaire autour de l'axe de rotation et comprend un dispositif de surpression relié à la chambre de surpression et adapté pour créer une surpression dans les évidements se trouvant exclusivement à l'intérieur de la troisième plage angulaire ;- The conveying device defines a pressure chamber extending over a third angular range around the axis of rotation and comprises a pressure device connected to the pressure chamber and adapted to create an overpressure in the recesses located exclusively within the third angular range;
- le rouleau de transport est soit un rouleau d'entrée, soit un cylindre de contre pression, soit un rouleau de transfert, soit un rouleau de freinage.- The transport roller is either an inlet roller or a back pressure cylinder, a transfer roller or a brake roller.
L'invention a en outre pour objet un dispositif de coupe d'une bande en feuilles du type comprenant :The invention furthermore relates to a device for cutting a sheet strip of the type comprising:
- un cylindre de coupe muni d'une lame ;a cutting cylinder provided with a blade;
- un cylindre de contre-pression coopérant avec le cylindre de coupe, ces cylindres étant adaptés pour couper une bande de substrat plat en feuilles ;a counter-pressure cylinder cooperating with the cutting cylinder, these cylinders being adapted to cut a strip of flat sheet substrate;
- un premier dispositif d'acheminement de feuilles coupées par les cylindres de coupe et de contre-pression, dans lequel le premier dispositif d'acheminement est un dispositif selon l'une quelconque des revendications précédentes, notamment un dispositif de transfert.a first device for conveying sheets cut by the cutting and back-pressure cylinders, wherein the first routing device is a device according to any one of the preceding claims, including a transfer device.
Selon un mode de réalisation particulier, le dispositif de coupe comprend un deuxième dispositif d'acheminement de feuilles, disposé en aval du premier dispositif d'acheminement de feuilles, et le deuxième dispositif d'acheminement est un dispositif du type précité, notamment un dispositif de freinage.According to a particular embodiment, the cutting device comprises a second sheet conveying device disposed downstream of the first sheet conveying device, and the second conveying device is a device of the aforementioned type, in particular a device braking.
L'invention concerne également une presse d'impression rotative, du type comprenant : - un dérouleur d'une bande à imprimer,The invention also relates to a rotary printing press, of the type comprising: a unwinder of a tape to be printed,
- une unité d'impression sur la bande à imprimer,a printing unit on the tape to be printed,
- un dispositif de coupe de la bande imprimée en feuilles, dans laquelle le dispositif de coupe est un dispositif de coupe du type précité. L'invention concerne aussi une utilisation d'un dispositif d'acheminement du type précité, comprenant les étapes suivantes :- A cutting device of the printed sheet tape, wherein the cutting device is a cutting device of the aforementioned type. The invention also relates to a use of a routing device of the aforementioned type, comprising the following steps:
- création d'une dépression dans au moins une partie de la pluralité d'évidements,creating a depression in at least a portion of the plurality of recesses,
- fourniture d'une feuille à acheminer, - acheminement de la feuille sur la surface de transport, et- supply of a sheet to be conveyed, - routing of the sheet on the transport surface, and
- nettoyage de la surface de transport par le dispositif de nettoyage. L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels : - la figure 1 est une vue schématique de côté d'une machine d'impression selon l'invention ;- cleaning of the transport surface by the cleaning device. The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings, in which: FIG. 1 is a diagrammatic side view of a machine for printing according to the invention;
- la figure 2 est une vue correspondant à la vue de la figure 1 , d'une variante d'une machine d'impression selon l'invention ;FIG. 2 is a view corresponding to the view of FIG. 1 of a variant of a printing machine according to the invention;
- la figure 3 est une vue schématique du dispositif de découpe et d'empilage selon un premier mode de réalisation ; et- Figure 3 is a schematic view of the cutting device and stacking according to a first embodiment; and
- la figure 4 est une vue de schématique correspondant à la vue de la figure 3, d'un deuxième mode de réalisation du dispositif de découpe et d'empilage selon l'invention. Sur la figure 1 est représentée une machine d'impression rotative selon l'invention, désignée par la référence générale 2.- Figure 4 is a schematic view corresponding to the view of Figure 3, a second embodiment of the cutting device and stacking according to the invention. In Figure 1 is shown a rotary printing machine according to the invention, designated by the general reference 2.
La machine d'impression 2 comprend un dérouleur 4, quatre unités d'impression 6, un dispositif de traction 8 et un dispositif de découpe et d'empilage 10. La machine d'impression 2 comprend en outre un dispositif de saisie de bande 14 et un dispositif de poudrage 16.The printing machine 2 comprises a unwinder 4, four printing units 6, a traction device 8 and a cutting and stacking device 10. The printing machine 2 further comprises a tape gripper 14 and a dusting device 16.
La machine d'impression 2 pourrait comprendre un nombre quelconque d'unités d'impression 6, en théorie, de un à n.The printing machine 2 could comprise any number of printing units 6, in theory, from one to n.
Le dérouleur 4 est adapté pour dérouler une bande à imprimer continue 18. La bande à imprimer 18 est une bande de papier couché. Le papier couché est un papier qui comprend une couche de revêtement, par exemple en kaolin ou en craie, améliorant les propriétés mécaniques ou optiques du papier. Ce papier permet d'obtenir un produit imprimé de haute qualité. En variante, il est possible que la bande à imprimer soit une bande de papier non couché. La machine d'impression 2 définit un trajet d'impression de la bande 18 entre le dérouleur 4, à travers les unités d'impression 6, le dispositif de saisie de bande 14, le dispositif de poudrage 16, et le dispositif de traction 8, jusqu'au dispositif de découpe et d'empilage 10.The unwinder 4 is adapted to unwind a continuous print tape 18. The print tape 18 is a coated paper web. Coated paper is a paper that includes a coating layer, for example of kaolin or chalk, improving the mechanical or optical properties of the paper. This paper makes it possible to obtain a printed product of high quality. Alternatively, it is possible that the tape to be printed is an uncoated paper tape. The printing machine 2 defines a print path of the web 18 between the unwinder 4, through the printing units 6, the web gripper 14, the dusting device 16, and the pulling device 8 , up to the cutting and stacking device 10.
Chaque unité d'impression 6 comporte un dispositif encreur 20 qui est muni d'un réservoir d'encre 22 comprenant de l'encre 24 prévue pour l'impression sur une bande de papier 18. L'encre 24 utilisée dans le cadre de l'invention sera expliquée ci-dessous. Chaque dispositif encreur 20 comprend en outre un rouleau de transfert d'encre 26 pour le transfert de l'encre 24 à des rouleaux d'impression 28 (voir ci-après). Les unités d'impression 6 comprennent des rouleaux d'impression 28 qui sont adaptés pour imprimer sur la bande de papier 18.Each printing unit 6 comprises an inking device 20 which is provided with an ink tank 22 comprising ink 24 intended for printing on a strip of paper 18. The ink 24 used in the context of the The invention will be explained below. Each ink device 20 further comprises an ink transfer roller 26 for transferring ink 24 to printing rollers 28 (see below). The printing units 6 comprise printing rollers 28 which are adapted to print on the paper web 18.
Le dispositif de découpe et d'empilage 10 est adapté pour découper la bande à imprimer 18 en des feuilles individuelles 30 et pour produire une pile 31 des feuilles individuelles découpées. Le dispositif de traction 8 est situé en aval de l'unité d'impression 6 la plus en aval et en amont du dispositif de découpe et d'empilage 10. Ce dispositif de traction 8 est adapté pour appliquer une tension mécanique déterminée sur la bande 18 sortant de l'unité d'impression 6 la plus en aval. Comme on le voit sur la figure 1 , la machine d'impression 2 est adaptée pour transporter la bande imprimée 18 en libre suspension et à l'air ambiant sur tout le trajet entre l'unité d'impression 6 la plus en aval et le dispositif de traction 8, éventuellement à l'exception du dispositif de saisie de bande 14 et du dispositif de poudrage 16. En outre, la machine d'impression 2 est aussi adaptée pour transporter la bande imprimée 18 à l'air ambiant sur tout le trajet entre le dispositif de traction 8 et le dispositif de découpe et d'empilage 10. Ainsi, la machine d'impression 2 de la figure 1 ne comporte pas de sécheur et a un encombrement faible. La machine d'impression 2 selon la variante montrée sur la figure 2 diffère de la machine d'impression 2 montrée sur la figure 1 par le fait qu'entre le dispositif de saisie de bande 14 et le dispositif de traction 8 est disposé un sécheur 32 à rayons infrarouges à travers lequel est menée la bande imprimée 18. Le sécheur 32 à rayons infrarouges peut être remplacé par un autre dispositif de séchage par chauffage de la bande, tel qu'un sécheur à air chaud. Le sécheur 32 a des dimensions réduites par rapport aux sécheurs de l'état de la technique.The cutter and stacker 10 is adapted to cut the print tape 18 into individual sheets 30 and to produce a stack 31 of the cut individual sheets. The traction device 8 is situated downstream of the printing unit 6 furthest upstream and upstream of the cutting and stacking device 10. This traction device 8 is adapted to apply a determined mechanical tension on the strip 18 exiting the printing unit 6 further downstream. As can be seen in FIG. 1, the printing machine 2 is adapted to transport the printed web 18 in free suspension and in ambient air all the way between the printing unit 6 furthest downstream and the traction device 8, possibly with the exception of the tape gripper 14 and the powdering device 16. In addition, the printing machine 2 is also adapted to transport the printed tape 18 to the ambient air over the entire path between the traction device 8 and the cutting and stacking device 10. Thus, the printing machine 2 of Figure 1 does not have a dryer and has a small footprint. The printing machine 2 according to the variant shown in FIG. 2 differs from the printing machine 2 shown in FIG. 1 by the fact that between the belt gripper 14 and the traction device 8 is arranged a dryer The infra-red dryer 32 may be replaced by another strip-drying device, such as a hot-air dryer. The dryer 32 has reduced dimensions compared with the prior art driers.
Le dispositif de saisie de bande 14 est adapté pour détecter une rupture de la bande de papier 18 et pour saisir l'extrémité libre de la bande de papier 18 dans ce cas. A cet effet, le dispositif de saisie de bande 14 comporte des éléments de saisie 34 appropriés. En variante, le dispositif de saisie de bande 14 est omis.The tape gripper 14 is adapted to detect a break in the paper web 18 and to grip the free end of the paper web 18 in this case. For this purpose, the tape gripper 14 has appropriate gripping elements 34. Alternatively, the tape gripper 14 is omitted.
Le dispositif de poudrage 16 est adapté pour déposer de la poudre anti- maculante sur chacune des faces de la bande 18 imprimée. Il peut déposer de la poudre anti-maculante sur l'une ou sur les deux faces de la bande 18 imprimée. A cet effet le dispositif de poudrage 16 comporte un réservoir 36 contenant de la poudre 38 et une tête de poudrage 40 reliée au réservoir de poudre 36 par une conduite 42 pour chacune de faces de la bande de papier 18.The powdering device 16 is adapted to deposit anti-staining powder on each of the faces of the printed strip 18. It can deposit anti-staining powder on one or both sides of the printed strip 18. For this purpose the dusting device 16 comprises a reservoir 36 containing powder 38 and a dusting head 40 connected to the powder reservoir 36 via a pipe 42 for each of the faces of the paper strip 18.
Le dispositif de poudrage 16 est adapté pour appliquer la poudre anti- maculante sur la bande de papier 18 en continue, de préférence en continue de manière ininterrompue sur une longueur qui correspond au moins à deux fois la longueur d'impression.The powdering device 16 is adapted to apply the anti-maculante powder to the paper web 18 continuously, preferably continuously continuously over a length which corresponds to at least twice the printing length.
La poudre anti-maculante 38 utilisée pour le poudrage de la bande est de préférence une poudre végétale, par exemple à base de mais, ou une poudre minérale. Le dispositif de traction 8, associé aux autres unités de la presse, permet d'imprimer une bande de papier et de la réceptionner dans le dispositif de découpe et d'empilage 10, sans sécher cette bande de papier 12 et par évaporation des solvants de l'encre. L'image est imprimée par l'encre 24 contenue dans le réservoir d'encre 22.The anti-maculante powder 38 used for the powdering of the strip is preferably a vegetable powder, for example based on corn, or a mineral powder. The traction device 8, associated with the other units of the press, makes it possible to print a strip of paper and to receive it in the cutting and stacking device 10, without drying this strip of paper 12 and by evaporation of the solvents of ink. The image is printed by the ink 24 contained in the ink tank 22.
De manière avantageuse, l'encre 24 est une encre siccative, ou une encre sans eau (« waterless »), ou une encre bi-composante. Le séchage des encres siccatives est la combinaison d'un premier phénomène dit « la pénétration dans le support » et d'un second phénomène dit « l'oxydo-polymérisation des vernis constitués d'huiles et de résines ».Advantageously, the ink 24 is a drying ink, or a waterless ink ("waterless"), or a two-component ink. The drying of drying inks is the combination of a first phenomenon called "penetration into the support" and a second phenomenon called "the oxidation polymerization of varnishes consisting of oils and resins".
Les encres sans eau (« waterless ») sont utilisées avec des plaques d'impression spécifiques permettant de définir des zones non imprimantes sans faire appel au procédé lithographique classique fondé sur le refus de l'encre grasse par une surface hydrophile préalablement humidifiée. L'utilisation de ces encres peut être envisagée au même titre que les encres siccatives conventionnelles vues précédemment et permet de se dispenser d'un sécheur, ou de le concevoir de manière moins encombrante.The waterless inks are used with specific printing plates to define non-printing areas without using the conventional lithographic process based on the rejection of the greasy ink by a previously moistened hydrophilic surface. The use of these inks can be considered in the same way as the conventional drying inks previously seen and can be dispensed with a dryer, or design less cumbersome.
Les encres fixables par la chaleur ("heat-set") par contre sèchent par évaporation des solvants minéraux mélangés à la résine. Les encres UV sèchent par polymérisation de la résine sous l'effet d'un rayonnement ultraviolet.Heat-set inks, on the other hand, dry by evaporation of the mineral solvents mixed with the resin. The UV inks dry by polymerization of the resin under the effect of ultraviolet radiation.
Sur la figure 3 est représenté schématiquement le dispositif de découpe et d'empilage 10.FIG. 3 diagrammatically shows the cutting and stacking device 10.
Le dispositif de découpe et d'empilage 10 comporte deux dispositifs d'acheminement de feuilles 30 vers la pile, à savoir un premier dispositif d'acheminement D1 ou de transfert et un second dispositif d'acheminement D2 ou de freinage.The cutting and stacking device 10 has two sheet feeding devices 30 to the stack, namely a first conveying device D1 or transfer and a second conveying device D2 or braking.
Le dispositif de découpe et d'empilage comporte deux rouleaux d'entrée 50, un cylindre de coupe 52, un cylindre de contre-pression 54, un rouleau de transfert 56 et un rouleau de freinage 58. Le dispositif de découpe 10 délimite un trajet T de la bande de papier 18 et des feuilles 30 s'étendant de l'entrée de ce dispositif 10 successivement sur les rouleaux d'entrée 50, le cylindre de contre-pression 54, le rouleau de transfert 56, le rouleau de freinage 58 jusqu'à la pile 31 de feuilles individuelles 30. Le dispositif de découpe et d'empilage 10 comporte une structure fixe S ou bâti.The cutting and stacking device comprises two input rollers 50, a cutting cylinder 52, a back pressure cylinder 54, a transfer roller 56 and a braking roller 58. The cutting device 10 defines a path T of the paper web 18 and sheets 30 extending from the inlet of this device 10 successively on the input rollers 50, the back pressure cylinder 54, the transfer roller 56, the brake roller 58 to stack 31 of individual sheets 30. The cutting and stacking device 10 comprises a fixed structure S or frame.
Les rouleaux d'entrée 50 sont disposés sur le trajet de la bande de papierThe input rollers 50 are arranged on the path of the paper web
18 en amont du cylindre de coupe 52 et du cylindre de contre-pression 54. Les deux rouleaux d'entrée 50 sont mobiles en rotation autour d'un axe A et B par rapport à la structure fixe S. Chacun des rouleaux d'entrée 50 comporte une enveloppe 60 ayant des trous traversants 62.18 upstream of the cutting cylinder 52 and the counter-pressure cylinder 54. The two input rollers 50 are rotatable about an axis A and B relative to the fixed structure S. Each of the input rollers 50 has an envelope 60 having through holes 62.
Le dispositif de découpe et d'empilage 10 comporte en outre un dispositif de vide 64 adapté pour créer une dépression dans les trous 62 sur une partie de la circonférence du rouleau d'entrée 50 concernée.The cutting and stacking device 10 further comprises a vacuum device 64 adapted to create a depression in the holes 62 on a portion of the circumference of the input roller 50 concerned.
Le cylindre de coupe 52 est mobile en rotation par rapport à la structure fixe S autour d'un axe de rotation Ç_. Le cylindre de coupe 52 comporte une lame 66 adaptée pour couper des feuilles 30 de la bande de papier 18.The cutting cylinder 52 is rotatable relative to the fixed structure S about an axis of rotation _. The cutting cylinder 52 has a blade 66 adapted to cut sheets 30 of the paper web 18.
Le cylindre de contre-pression 54 est disposé adjacent au cylindre de coupe 52 et est mobile en rotation par rapport à la structure fixe S autour d'un axe de rotation D. Le cylindre de contre-pression 54 est muni de par exemple deux blocs de contre-pression 68 régulièrement répartis sur la circonférence du cylindre de contre-pression 54. Ces blocs de contre-pression 68 coopèrent avec la lame 66 en vue de couper la bande 18 en des feuilles 30. En outre, le cylindre de contre-pression 54 comporte une enveloppe 70 munie de trous traversants 72. L'enveloppe 70 est un cylindre creux à section circulaire. La partie intérieure de l'enveloppe 70 est reliée au dispositif de vide 64. Ainsi, un vide ou une dépression peut être créé sur une partie angulaire de la circonférence de l'enveloppe 70 qui correspond au trajet T de la bande. Ceci permet de maintenir la bande de papier 18 contre le cylindre de contre-pression 54.The counter-pressure cylinder 54 is disposed adjacent to the cutting cylinder 52 and is rotatable relative to the fixed structure S about an axis of rotation D. The back-pressure cylinder 54 is provided for example with two blocks against back pressure 68 regularly distributed over the circumference of the counter-pressure cylinder 54. These counter-pressure blocks 68 cooperate with the blade 66 in order to cut the strip 18 into sheets 30. In addition, the counter-pressure cylinder 68 pressure 54 comprises an envelope 70 provided with through holes 72. The envelope 70 is a hollow cylinder with a circular section. The inner portion of the envelope 70 is connected to the vacuum device 64. Thus, a vacuum or vacuum can be created on an angular portion of the circumference of the envelope 70 which corresponds to the path T of the tape. This makes it possible to hold the paper strip 18 against the backpressure cylinder 54.
Le premier dispositif d'acheminement D1 est adapté pour prendre une feuille imprimée 30, qui vient d'être coupée par le cylindre de contre-pression 54 et par le cylindre de coupe 52 et de l'acheminer le long d'une partie du trajet T. Le premier dispositif d'acheminement D1 comprend le rouleau de transfertThe first conveying device D1 is adapted to take a printed sheet 30, which has just been cut by the back pressure cylinder 54 and the cutting cylinder 52 and to route it along part of the path T. The first routing device D1 includes the transfer roller
56.56.
Le rouleau de transfert 56 est muni d'une enveloppe 80. L'enveloppe 80 est mobile en rotation autour d'un axe de rotation E par rapport à la structure S. L'enveloppe 80 est entraînée selon un sens de rotation R1 , qui est le sens antihoraire sur les figures. L'enveloppe 80 est de forme cylindrique à section circulaire creuse, et définit une surface de transport 82 adaptée pour être en contact avec la feuille 30 en vue de son acheminement. L'enveloppe 80 est munie d'une pluralité de trous 84 traversants, s'étendant radialement par rapport à l'axe de rotation E et débouchant sur la surface de transport 82.The transfer roller 56 is provided with an envelope 80. The envelope 80 is rotatable about an axis of rotation E with respect to the structure S. The envelope 80 is driven in a direction of rotation R1, which is counterclockwise in the figures. The casing 80 is cylindrical in shape with a hollow circular section, and defines a conveying surface 82 adapted to be in contact with the sheet 30 for the purpose of conveying it. The envelope 80 is provided with a plurality of through holes 84 extending radially with respect to the axis of rotation E and opening onto the transport surface 82.
Le premier dispositif d'acheminement D1 comporte une paroi fixe 85 par rapport à la structure S. Cette paroi fixe 85 est disposée à l'intérieur de l'enveloppe 80 et délimite une chambre de dépression 86 s'étendant sur une première plage angulaire α. Cette première plage angulaire α s'étend sur moins deThe first conveying device D1 comprises a fixed wall 85 with respect to the structure S. This fixed wall 85 is disposed inside the casing 80 and defines a vacuum chamber 86 extending over a first angular range α . This first angular range α extends over less than
360° autour de l'axe de rotation E_, et en l'occurrence sur 180°. La chambre de dépression 86 est reliée au dispositif de vide 64. Ainsi, le premier dispositif d'acheminement D1 est adapté pour créer une dépression dans les trous 84 situés exclusivement dans la partie de la circonférence de l'enveloppe 80 correspondant à la première plage angulaire α.360 ° around the axis of rotation E_, and in this case 180 °. The vacuum chamber 86 is connected to the vacuum device 64. Thus, the first conveying device D1 is adapted to create a depression in the holes 84 located exclusively in the portion of the circumference of the envelope 80 corresponding to the first range. angular α.
La paroi fixe 85 délimite une chambre ambiante 88 s'étendant sur une deuxième plage angulaire β autour de l'axe de rotation E_. Ainsi, les trous 84 de l'enveloppe 80 sont soumis à la pression ambiante sur la partie de la circonférence de la surface de transport 82 correspondant à cette deuxième plage angulaire. Cette deuxième plage s'étend sur environ 160° autour de l'axe de rotation E.The fixed wall 85 delimits an ambient chamber 88 extending over a second angular range β about the axis of rotation E_. Thus, the holes 84 of the envelope 80 are subjected to the ambient pressure on the part of the circumference of the transport surface 82 corresponding to this second angular range. This second range extends about 160 ° around the axis of rotation E.
La paroi fixe 85 délimite également une chambre de surpression 90 s'étendant sur une troisième plage angulaire y autour de l'axe de rotation E. La chambre de surpression 90 s'étend sur environ 20°. Elle est reliée à un dispositif de surpression 92 adapté pour créer une surpression dans les trous 84 se trouvant exclusivement à l'intérieur de la troisième plage angulaire.The fixed wall 85 also defines a pressure chamber 90 extending over a third angular range y about the axis of rotation E. The overpressure chamber 90 extends over approximately 20 °. It is connected to an overpressure device 92 adapted to create an overpressure in the holes 84 located exclusively within the third angular range.
La première plage angulaire α coïncide avec la partie du trajet T associée au rouleau de transfert 56. La troisième plage angulaire y se trouve en face du rouleau de freinage 58 et est adaptée pour pousser la feuille 30 vers ce rouleau de freinage 58.The first angular range α coincides with the portion of the path T associated with the transfer roller 56. The third angular range is opposite the braking roller 58 and is adapted to push the sheet 30 towards this braking roller 58.
Le dispositif d'acheminement D2 comporte le rouleau de freinage 58.The routing device D2 comprises the braking roller 58.
Le rouleau de freinage 58 est muni d'une enveloppe 100 cylindrique à section circulaire creuse qui délimite une surface de transport 102. L'enveloppe 100 est mobile en rotation autour d'un axe de rotation F par rapport à la structure S. L'enveloppe 100 est entraînée selon un sens d'entraînement R2 qui est le sens opposé du sens R1 . L'enveloppe 100 est munie d'une pluralité de trous 104 traversant cette enveloppe 100 et débouchant sur la surface de transport 102. Le deuxième dispositif d'acheminement D2 comporte une paroi fixe 105 par rapport à la structure S. Cette paroi fixe 105 est disposée à l'intérieur de l'enveloppe 100 et délimite une chambre de dépression 106 s'étendant sur une première plage angulaire δ autour de l'axe de rotation F. Cette première plage angulaire δ s'étend sur environ 90° depuis la chambre de surpr ession 90 dans le sens de rotation R2.The braking roller 58 is provided with a cylindrical envelope 100 with a hollow circular section which delimits a transport surface 102. The envelope 100 is rotatable about an axis of rotation F with respect to the structure S. The envelope 100 is driven in a drive direction R2 which is the opposite direction of the direction R1. The envelope 100 is provided with a plurality of holes 104 passing through this envelope 100 and opening onto the transport surface 102. The second routing device D2 comprises a fixed wall 105 with respect to the structure S. This fixed wall 105 is disposed inside the casing 100 and delimits a vacuum chamber 106 extending over a first angular range δ about the axis of rotation F. This first angular range δ extends about 90 ° from the chamber overpressure 90 in the direction of rotation R2.
Le dispositif d'acheminement D2 délimite également une chambre ambianteThe routing device D2 also delimits an ambient chamber
108 s'étendant sur une deuxième plage angulaire ε d'environ 270°autour de l'axe de rotation f_. Cette chambre ambiante 108 soumet les trous 104 se trouvant dans la deuxième plage ε à la pression ambiante. Le deuxième dispositif d'acheminement D2 est adapté pour prendre une feuille 30 du rouleau de transfert 56 et de la freiner puis de la déposer sur la pile 31 des feuilles.108 extending over a second angular range ε of about 270 ° about the axis of rotation f_. This ambient chamber 108 subjects the holes 104 in the second range ε to the ambient pressure. The second routing device D2 is adapted to take a sheet 30 of the transfer roller 56 and to brake it and then to deposit it on the stack 31 of the sheets.
En outre, chacun des premier D1 et second D2 dispositifs d'acheminement comporte un dispositif de nettoyage 120 de la surface de transport associée 82, 102. Dans ce qui suit un seul des dispositifs de nettoyage 120 sera décrit.In addition, each of the first D1 and second D2 routing devices includes a cleaning device 120 of the associated transport surface 82, 102. In the following one of the cleaning devices 120 will be described.
Selon le mode de réalisation de la figure 3, le dispositif de nettoyage 120 est un dispositif d'application adapté pour appliquer du liquide de nettoyage sur la surface de transport 82 et 102. Le dispositif de nettoyage 120 comporte un réservoir 124 contenant du liquide de nettoyage 126 et une conduite 128 adaptée pour amener ce liquide de nettoyage 126 au dispositif d'application 122.According to the embodiment of FIG. 3, the cleaning device 120 is an application device adapted to apply cleaning liquid to the transport surface 82 and 102. The cleaning device 120 comprises a reservoir 124 containing liquid cleaning 126 and a pipe 128 adapted to bring the cleaning liquid 126 to the application device 122.
De préférence, le liquide de nettoyage 126 est du liquide repoussant de l'encre, par exemple une émulsion de silicone et de l'eau. De manière préférentielle, le dispositif d'application 122 est en contact avec la surface de transport 82, 102 à un emplacement angulaire situé à l'intérieur de la deuxième plage angulaire β, ε qui est associée à la chambre ambiante 88, 108. Ainsi, le liquide de nettoyage n'est pas aspiré dans les trous 84, ni éjecté par les trous 84. Le dispositif d'application 122 comprend par exemple un tissu qui est mouillé par le liquide 126.Preferably, the cleaning liquid 126 is a repellent liquid of the ink, for example a silicone emulsion and water. Preferably, the application device 122 is in contact with the transport surface 82, 102 at an angular position located inside the second angular range β, ε which is associated with the ambient chamber 88, 108. the cleaning liquid is not sucked into the holes 84 or ejected through the holes 84. The applicator device 122 comprises, for example, a fabric which is wetted by the liquid 126.
Le dispositif de découpe 10 du premier mode de réalisation est donc dépourvu d'un dispositif d'essuyage du liquide de nettoyage 126. Le dispositif de découpe 10 comprend des troisième D3, quatrième D4 et cinquième D5 dispositifs d'acheminement.The cutting device 10 of the first embodiment is therefore devoid of a device for wiping the cleaning liquid 126. The cutting device 10 comprises third D3, fourth D4 and fifth D5 routing devices.
Le troisième D3 et le quatrième D4 dispositifs d'acheminement sont des dispositifs d'acheminement de la bande de papier 18 et comprennent à chaque fois un rouleau d'entrée 50. Chacun des troisième D3 et quatrième D4 dispositifs d'acheminement comprend un dispositif de nettoyage 120, identique à celui décrit en référence au premier dispositif d'acheminement D1. Ce dispositif de nettoyage 120 est adapté pour nettoyer la surface de transport des rouleaux 50.The third D3 and the fourth D4 conveying devices are conveyors of the paper web 18 and each comprise an input roll 50. Each of the third D3 and fourth D4 conveying devices comprises a delivery device. cleaning 120, identical to that described with reference to the first routing device D1. This cleaning device 120 is adapted to clean the transport surface of the rollers 50.
Le cinquième dispositif d'acheminement D5 comporte le cylindre de contre coupe 54 et un dispositif de nettoyage 120, identique à celui décrit en référence au premier dispositif d'acheminement D1. Ce dispositif de nettoyage 120 est adapté pour nettoyer la surface de transport du cylindre de contre coupe 54.The fifth conveying device D5 comprises the backing cylinder 54 and a cleaning device 120, identical to that described with reference to the first routing device D1. This cleaning device 120 is adapted to clean the transport surface of the countercut cylinder 54.
Toutes les caractéristiques du dispositif de nettoyage 120 décrites en liaison avec les dispositifs d'acheminement D1 et D2 sont applicables de manière analogue aux dispositifs d'acheminement D3 à D5.All the characteristics of the cleaning device 120 described in connection with the routing devices D1 and D2 are applicable analogously to the routing devices D3 to D5.
Sur la figure 4 est représenté un dispositif de découpe 10 selon un deuxième mode de réalisation de l'invention, qui diffère du mode de réalisation précédemment décrit par ce qui suit. Les éléments analogues portent les mêmes références. Le liquide de nettoyage 126 du liquide de lavage est par exemple un solvant d'encre, à base de hydrocarbures. Le dispositif de nettoyage 120 comporte en outre un dispositif d'essuyage 130 adapté pour retirer du liquide de lavage de la surface de transport 82, 102. Le dispositif d'essuyage 130 est disposé en aval du dispositif d'application du liquide de lavage 122 dans le sens d'entraînement du rouleau de transfert 56 ou du rouleau de freinage 58.In Figure 4 is shown a cutting device 10 according to a second embodiment of the invention, which differs from the embodiment previously described by the following. Similar elements bear the same references. The cleaning liquid 126 for the washing liquid is, for example, an ink solvent based on hydrocarbons. The cleaning device 120 further comprises a wiper device 130 adapted to remove washing liquid from the transport surface 82, 102. The wiper device 130 is disposed downstream of the washing liquid application device 122 in the driving direction of the transfer roller 56 or the braking roller 58.
Grâce à l'invention, la surface de transport 82, 102 est propre lorsqu'une feuille 30 est déposée sur chacun des rouleaux de transfert 56, et de freinage 58 et la qualité d'impression est augmentée. Pendant l'utilisation, la bande de papier 18 est imprimée par les unités d'impression 6, la bande de papier imprimée 18 entre dans le dispositif de découpe 10.Thanks to the invention, the transport surface 82, 102 is clean when a sheet 30 is deposited on each of the transfer rollers 56, and braking 58 and the print quality is increased. During use, the paper web 18 is printed by the printing units 6, the printed paper web 18 enters the cutting device 10.
Ensuite, la bande de papier 18 est coupée en des feuilles 30 par les cylindres de coupe 52 et de contre-pression 54 et les feuilles 30 sont fournies au premier dispositif d'acheminement D1.Then, the paper web 18 is cut into sheets 30 by the cutting cylinders 52 and back pressure 54 and the sheets 30 are supplied to the first conveying device D1.
Un vide ou une dépression est créé dans chacun des trous 84, 104 situés dans la première plage angulaire α, δ.A vacuum or a depression is created in each of the holes 84, 104 located in the first angular range α, δ.
La feuille 30 est acheminée sur la surface de transport 82, puis est soufflée vers la surface de transport 102 par la chambre de surpression 90.The sheet 30 is conveyed on the conveying surface 82, and is then blown towards the transport surface 102 by the overpressure chamber 90.
Ensuite, la feuille 30 est freinée par le rouleau de freinage 58 et disposée sur la pile 31.Then, the sheet 30 is braked by the braking roller 58 and disposed on the stack 31.
Le liquide de nettoyage 126 est appliqué d'une manière continue sur une partie de la surface de transport 82, 102 pendant qu'une autre partie de cette surface de transport 82, 102 achemine une feuille 30.The cleaning liquid 126 is applied continuously to a portion of the transport surface 82, 102 while another portion of this transport surface 82, 102 carries a sheet 30.
En d'autres termes, après que la feuille 30 ait quitté la partie de la surface de transport 82, 102 et avant que la feuille 30 suivante entre en contact avec cette partie de la surface de transport 82, 102, le liquide de nettoyage 126 est appliqué sur cette partie de la surface de transport. Le dispositif de nettoyage peut être utilisé pour nettoyer la surface de transport de tout type de cylindre de transport d'un substrat plat, tel qu'une feuille ou une bande. In other words, after the sheet 30 has left the part of the transport surface 82, 102 and before the next sheet comes into contact with this part of the transport surface 82, 102, the cleaning liquid 126 is applied on this part of the transport surface. The cleaning device can be used to clean the transport surface of any type of transport cylinder of a flat substrate, such as a sheet or web.

Claims

REVENDICATIONS
1.- Dispositif d'acheminement (D1 , D2, D3, D4, D5) d'un substrat plat, tel qu'une feuille (30) ou une bande (18), du type comprenant :1.- Device for conveying (D1, D2, D3, D4, D5) of a flat substrate, such as a sheet (30) or a strip (18), of the type comprising:
- un rouleau de transport (50, 54, 56, 58) adapté pour acheminer un substrat plat à transporter, le rouleau de transport ayant une surface de transport (82, 102) qui est en contact avec le substrat plat (18, 30) pendant le transport et qui est munie d'une pluralité d'évidements (62, 72, 84, 104) ;a transport roller (50, 54, 56, 58) adapted to convey a flat substrate to be transported, the transport roller having a conveying surface (82, 102) which is in contact with the flat substrate (18, 30) during transportation and which is provided with a plurality of recesses (62, 72, 84, 104);
- un dispositif de vide (64) adapté pour créer une dépression dans la pluralité d'évidements ; caractérisé en ce qu'il comprend un dispositif de nettoyage (120) de la surface de transport (82, 102).a vacuum device (64) adapted to create a depression in the plurality of recesses; characterized in that it comprises a cleaning device (120) for the transport surface (82, 102).
2.- Dispositif d'acheminement selon la revendication 1 , caractérisé en ce que le dispositif de nettoyage comprend un dispositif d'application (122) adapté pour appliquer du liquide de nettoyage (126) sur la surface de transport (82, 102).2. A conveying device according to claim 1, characterized in that the cleaning device comprises an application device (122) adapted to apply cleaning liquid (126) on the transport surface (82, 102).
3.- Dispositif d'acheminement selon la revendication 2, caractérisé en ce que le dispositif de nettoyage (120) comprend un réservoir (124) contenant du liquide de nettoyage (126), et une conduite (128) adaptée pour amener ce liquide de nettoyage au dispositif d'application (122).3.- A conveyor device according to claim 2, characterized in that the cleaning device (120) comprises a reservoir (124) containing cleaning liquid (126), and a pipe (128) adapted to bring the liquid of cleaning the application device (122).
4.- Dispositif d'acheminement selon la revendication 3, caractérisé en ce que le liquide de nettoyage est du liquide repoussant de l'encre, notamment une émulsion de silicone et d'eau.4. A conveying device according to claim 3, characterized in that the cleaning liquid is the repellent liquid of the ink, in particular a silicone emulsion and water.
5.- Dispositif d'acheminement selon la revendication 3, caractérisé en ce que le liquide de nettoyage (126) est du liquide de lavage, de préférence un solvant d'encre, et en ce que le dispositif de nettoyage (120) comprend un dispositif d'essuyage (130) adapté pour retirer du liquide de lavage de la surface de transport.5. A conveying device according to claim 3, characterized in that the cleaning liquid (126) is washing liquid, preferably an ink solvent, and in that the cleaning device (120) comprises a wiper device (130) adapted to remove washing liquid from the transport surface.
6.- Dispositif d'acheminement selon la revendication 5, caractérisé en ce que le dispositif d'essuyage (130) est disposé en aval du dispositif d'application du liquide de lavage, vu dans le sens d'entraînement du rouleau de transport (50, 54, 56, 58). 6. A conveyor device according to claim 5, characterized in that the wiper device (130) is arranged downstream of the washing liquid application device, seen in the driving direction of the transport roller ( 50, 54, 56, 58).
7.- Dispositif d'acheminement selon l'une quelconque des revendications précédentes, caractérisé en ce que : - le dispositif d'acheminement définit une chambre de dépression (86) s'étendant sur une première plage angulaire (α,δ) autour de l'axe de rotation (E, F) du rouleau de transport, cette première plage angulaire (α,δ) s'étendant sur moins de 360° en ce que - le dispositif de vide (64) est relié à la chambre de dépression et adapté pour créer une dépression dans les évidements se trouvant exclusivement dans la première plage angulaire (α, δ), en ce que7.- conveying device according to any one of the preceding claims, characterized in that: the conveying device defines a vacuum chamber (86) extending over a first angular range (α, δ) around the axis of rotation (E, F) of the transport roller, this first angular range (α , δ) extending over less than 360 ° in that - the vacuum device (64) is connected to the vacuum chamber and adapted to create a vacuum in the recesses located exclusively in the first angular range (α, δ ), in that
- le dispositif d'acheminement définit une chambre ambiante (88) s'étendant sur une deuxième plage angulaire (β,ε), les évidements se trouvant dans la deuxième plage angulaire étant soumis à la pression ambiante, et en ce quethe routing device defines an ambient chamber (88) extending over a second angular range (β, ε), the recesses in the second angular range being subjected to ambient pressure, and in that
- le dispositif de nettoyage coopère avec la surface de transport (82, 102) à l'intérieur de la deuxième plage angulaire (β, ε).- The cleaning device cooperates with the transport surface (82, 102) within the second angular range (β, ε).
8.- Dispositif d'acheminement selon la revendication 7, caractérisé en ce que le dispositif d'acheminement définit une chambre de surpression (90) s'étendant sur une troisième plage angulaire (y) autour de l'axe de rotation (E), et en ce que le dispositif d'acheminement comprend un dispositif de surpression (92) relié à la chambre de surpression et adapté pour créer une surpression dans les évidements se trouvant exclusivement à l'intérieur de la troisième plage angulaire.8. A conveying device according to claim 7, characterized in that the conveying device defines a pressure chamber (90) extending over a third angular range (y) about the axis of rotation (E). , and in that the conveying device comprises an overpressure device (92) connected to the pressure chamber and adapted to create an overpressure in the recesses located exclusively within the third angular range.
9.- Dispositif d'acheminement selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau de transport est soit un rouleau d'entrée (50), soit un cylindre de contre pression (54), soit un rouleau de transfert (56), soit un rouleau de freinage (58).9. A conveyor device according to any one of the preceding claims, characterized in that the transport roller is either an inlet roller (50), a back pressure cylinder (54), or a transfer roller (56), a brake roller (58).
10.- Dispositif de coupe d'une bande en feuilles du type comprenant :10. A device for cutting a sheet strip of the type comprising:
- un cylindre de coupe (52) muni d'une lame (66) ; - un cylindre de contre-pression (54) coopérant avec le cylindre de coupe, ces cylindres (52, 54) étant adaptés pour couper une bande de substrat plat (18) en feuilles (30) ;- a cutting cylinder (52) provided with a blade (66); a counter-pressure cylinder (54) cooperating with the cutting cylinder, said cylinders (52, 54) being adapted to cut a sheet-like flat substrate web (18) (30);
- un premier dispositif d'acheminement (D1 , D2) de feuilles coupées par les cylindres de coupe et de contre-pression, caractérisé en ce que le premier dispositif d'acheminement est un dispositif selon l'une quelconque des revendications précédentes, notamment un dispositif de transfert. a first conveying device (D1, D2) for sheets cut by the cutting and counterpressure cylinders, characterized in that the first conveying device is a device according to any one of the preceding claims, in particular a transfer device.
11.- Dispositif de coupe selon la revendication 10, caractérisé en ce qu'il comprend un deuxième dispositif d'acheminement (D2) de feuilles, disposé en aval du premier dispositif d'acheminement (D1 ) de feuilles, et en ce que le deuxième dispositif d'acheminement est un dispositif selon l'une quelconque des revendications 1 à 9, notamment un dispositif de freinage.11. A cutting device according to claim 10, characterized in that it comprises a second device for conveying (D2) sheets, arranged downstream of the first conveyor device (D1) leaves, and in that the second conveyor device is a device according to any one of claims 1 to 9, in particular a braking device.
12. - Presse d'impression rotative, du type comprenant :12. - Rotary printing press, of the type comprising:
- un dérouleur (4) d'une bande à imprimer (18),a unwinder (4) of a printing tape (18),
- une unité d'impression (6) sur la bande à imprimer (18),- a printing unit (6) on the print tape (18),
- un dispositif de coupe (10) de la bande imprimée en feuilles (30), caractérisée en ce que le dispositif de coupe est un dispositif de coupe selon l'une des revendications 10 ou 11.- A cutting device (10) of the printed sheet web (30), characterized in that the cutting device is a cutting device according to one of claims 10 or 11.
13. - Utilisation d'un dispositif d'acheminement selon l'une quelconque des revendications 1 à 9, caractérisée par les étapes suivantes :13. - Use of a routing device according to any one of claims 1 to 9, characterized by the following steps:
- création d'une dépression dans au moins une partie de la pluralité d'évidements,creating a depression in at least a portion of the plurality of recesses,
- fourniture d'une feuille (30) à acheminer,supplying a sheet (30) to be conveyed,
- acheminement de la feuille (30) sur la surface de transport, ettransporting the sheet (30) on the transport surface, and
- nettoyage de la surface de transport (82, 102) par le dispositif de nettoyage (120). - cleaning the transport surface (82, 102) by the cleaning device (120).
EP20090746012 2008-04-30 2009-04-29 Device for conveying a flat substrate, comprising a cleaning device, and corresponding cutting device, printing press, and use of said device Not-in-force EP2271564B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0852929A FR2930768B1 (en) 2008-04-30 2008-04-30 DEVICE FOR DELIVERING A FLAT SUBSTRATE WITH A CLEANING DEVICE, CUTTING DEVICE, PRESS PRESS AND USE THEREOF
PCT/FR2009/050790 WO2009138693A2 (en) 2008-04-30 2009-04-29 Device for conveying a flat substrate, comprising a cleaning device, and corresponding cutting device, printing press, and use of said device

Publications (2)

Publication Number Publication Date
EP2271564A2 true EP2271564A2 (en) 2011-01-12
EP2271564B1 EP2271564B1 (en) 2013-07-17

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EP20090746012 Not-in-force EP2271564B1 (en) 2008-04-30 2009-04-29 Device for conveying a flat substrate, comprising a cleaning device, and corresponding cutting device, printing press, and use of said device

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US (1) US20110107930A1 (en)
EP (1) EP2271564B1 (en)
JP (1) JP2011520724A (en)
CN (1) CN102083724A (en)
FR (1) FR2930768B1 (en)
WO (1) WO2009138693A2 (en)

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CN110626061B (en) * 2019-10-25 2021-07-23 江苏如钰机械制造有限公司 Dust collector and gravure press

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Also Published As

Publication number Publication date
WO2009138693A3 (en) 2010-01-07
CN102083724A (en) 2011-06-01
FR2930768A1 (en) 2009-11-06
WO2009138693A8 (en) 2010-11-18
EP2271564B1 (en) 2013-07-17
JP2011520724A (en) 2011-07-21
WO2009138693A2 (en) 2009-11-19
US20110107930A1 (en) 2011-05-12
FR2930768B1 (en) 2011-07-15

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