EP0035741B1 - Dispositif pour imprimer en plusieurs couleurs une bande en matière thermoplastique - Google Patents

Dispositif pour imprimer en plusieurs couleurs une bande en matière thermoplastique Download PDF

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Publication number
EP0035741B1
EP0035741B1 EP81101533A EP81101533A EP0035741B1 EP 0035741 B1 EP0035741 B1 EP 0035741B1 EP 81101533 A EP81101533 A EP 81101533A EP 81101533 A EP81101533 A EP 81101533A EP 0035741 B1 EP0035741 B1 EP 0035741B1
Authority
EP
European Patent Office
Prior art keywords
cooling surface
drying apparatus
printing
disposed
cooling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81101533A
Other languages
German (de)
English (en)
Other versions
EP0035741A1 (fr
Inventor
Werner Ing. Grad. Friz
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.)
Ramisch Kleinewefers GmbH
Original Assignee
Ramisch Kleinewefers GmbH
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 Ramisch Kleinewefers GmbH filed Critical Ramisch Kleinewefers GmbH
Priority to AT81101533T priority Critical patent/ATE7124T1/de
Publication of EP0035741A1 publication Critical patent/EP0035741A1/fr
Application granted granted Critical
Publication of EP0035741B1 publication Critical patent/EP0035741B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0483—Drying combined with cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0423—Drying webs by convection
    • B41F23/0426—Drying webs by convection using heated air

Definitions

  • the invention relates to a device for multicolor printing of thermoplastic film webs with a plurality of printing units connected in series and at least one drying device arranged between adjacent printing units, in which the freshly printed ink is dried by supplying air.
  • the precision of the repeat is essential for multi-color printing of thermoplastic film webs, i.e. the exact coverage of the printed images that are transferred from the corresponding printing units, in particular printing rollers, to the film web.
  • the film web itself is the cause of malfunctions. If the film web has been produced with a drawing calender, the web always has a thickness profile as a result of the rolling out, which is formed in accordance with the deflection and the roll shape. This thickness profile multiplies when rolled up into a roll. This results in differences in the diameter of the wrapping bale, which make printing or repeating difficult because of the inevitable stretching of the film web.
  • These faults are prevented by feeding the thermoplastic film web to a heating and cooling cylinder combination before printing.
  • the film web which is pressed onto a heating cylinder with a rubber roller, is heated and then cooled via a downstream cooling cylinder.
  • the leveled film is then fed to the printing device.
  • Paper formats are individual sections of paper that are passed through the known device and are also guided over a cooling roller.
  • thermoplastic film webs the liquid content of the applied printing ink has no local or overall effect on the dimensions of the film web.
  • heat treatment is critical, in particular in combination with a state of tension, which is generated, for example, by the thermoplastic film web being guided over a plurality of rolls or rollers or the like, the peripheral speeds of which are not exactly matched to one another.
  • the invention has recognized that in the case of multicolored printing on film webs, the cause of the faults described must be sought primarily in the area of the drying devices, because in the area of the drying devices air is blown onto the printed side of the film web at room temperature or at a higher temperature in order to print the freshly printed Drying colors.
  • the film also heats up and a shrinking process occurs in which the cross section of the film approximates the original thickness profile.
  • the object of the invention is to improve compliance with the repeat in multicolor printing of thermoplastic film webs.
  • each drying device has a sliding table arranged in the straight guide plane of the film web with a cooling surface for the non-printed side of the film web, and in that the drying air is blown in the direction of the cooling surface.
  • the film web is to be guided over a straight guide plane, which means that the cooling surface of the sliding table is also flat and that the film web is guided parallel to it over the cooling surface.
  • Multi-color printing of thermoplastic film webs uses a large number of printing cylinders, each with a different diameter. The diameter of a printing cylinder is determined by the design. If other patterns are to be printed in a different repeat using the same device, the printing cylinders are replaced. However, the new printing cylinders have a different diameter and, accordingly, a different peripheral speed because the drives of the printing cylinders cannot be controlled so precisely that a peripheral speed that is the same for all printing cylinders can be used.
  • the drying device in the device according to the invention has a flat cooling surface, one avoids the difficulty of adapting cooling cylinders, as they are known in principle, with regard to their rotational speed or peripheral speed to the peripheral speed predetermined by the pressure cylinders present.
  • thermoplastic film web guided over it passes without any force, so that the film web is not elongated when sliding over the cooling surface.
  • an extremely thin air separation layer is formed between the flat cooling surface and the thermoplastic film web guided over it, on which the film floats like an air cushion, but which nevertheless still allows cooling. This air cushion is not reduced by the drying air blown against the cooling plate.
  • thermoplastic film web when it overflows over the flat cooling surface serves to stabilize the thermoplastic film web. Since heating of the film web is neither necessary in the area of the preceding printing unit nor by means of drying air, the film web is brought into a state by the cooling effect to that extent, which makes it more resistant for processing in the next printing unit. This essentially means an increase in the resistance to longitudinal stresses that try to stretch the film web in the longitudinal direction. However, if such a longitudinal expansion is suppressed, the repeat can be set exactly.
  • the sliding table expediently has coolant channels.
  • These coolant channels can be formed by profile sheets arranged on the back of the sliding table and excluded from a cooling system with a heat exchanger and circulation pump. Other arrangements and configurations of the coolant channels are possible.
  • An embodiment which is advantageous from a functional point of view is characterized in that a plurality of nozzles for supplying dry air are arranged opposite the cooling surface. Then the impulse of the air jets can also be used to press the film web against the cooling surface or the sliding table.
  • the impulses of the air jets are usually so large that the film web is pressed against the cooling surface even when the cooling surface is directed downwards and the nozzles are arranged below it. As a result, the function of the drying device is largely independent of its respective spatial arrangement.
  • the drying device with the cooling surface can be arranged essentially horizontally or at an angle to the horizontal or essentially vertically.
  • a preferred embodiment is characterized by two drying devices arranged next to one another and connected in series, through which the film web is first guided upwards and then downwards again, or vice versa, before it runs into the next printing unit.
  • the distance between the printing units can be kept short and at the same time the path of the film web available for drying can be increased.
  • the drying device can also have a plurality of cooling surfaces arranged in different levels, in particular a vertical and then a horizontal cooling surface.
  • each drying device in a housing, one wall of which forms the cooling surface.
  • the device shown in the figure is used for multi-color printing of thermoplastic film webs 1 with a plurality of printing units connected in series, of which only two printing units 2, 3 are shown in the drawing.
  • the printing units 2, 3 are constructed identically, so that it is sufficient to describe only one printing unit.
  • Each printing unit has an ink tray 4, in which a printing roller 5 is partially immersed.
  • the pressure roller 5 has a drive, not shown.
  • Each pressure roller 5 is assigned a press roller 6, which is arranged above the pressure roller 5 in the exemplary embodiment shown.
  • the film web 1 is drawn into the nip between the printing roller 6 and printed on it. After printing, the film web 1 arrives in a drying device 7, which is enclosed by a housing 8, which has an inlet slot 9 on one side and an outlet slot 10 for the film web 1 on the opposite side.
  • the housing 8 is box-shaped and has an essentially horizontal partition 11 with a plurality of nozzles 12 arranged therein.
  • an inlet connection 14 for the supply of air with room temperature or also at a higher temperature.
  • the supplied air is blown through the nozzles 12 onto the currently printed side of the film web 1 and is intended to dry the freshly printed ink. Used air is drawn off via an outlet connection (not shown).
  • the upper wall of the housing 8 is designed as a cooled sliding table 15.
  • the sliding table 15 has a cooling surface 16 directed downwards, against which the film web is pressed with its unprinted side under the angle of the air jets.
  • a plurality of profiled sheets 17 are fastened, which form cooling channels 18 which connect to a cooling system (not shown) stem with heat exchanger and circulation pump are connected.
  • the drying device 7 can be arranged not only with a horizontal cooling surface as in FIG. 1 but also with a cooling surface inclined to the horizontal (FIG. 2).
  • a cooling surface inclined to the horizontal FIG. 2
  • the drying device 7 can also be arranged vertically, as shown in FIG. 4. In this case, the embodiment shown in FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Coloring (AREA)
  • Paper (AREA)
  • Manufacturing Of Printed Wiring (AREA)

Claims (12)

1. Dispositif pour imprimer en plusieurs couleurs une bande en matière thermoplastique, comportant plusieurs groupes imprimeurs (2, 3) placés à la suite l'un de l'autre et au moins un dispositif de séchage (7) prévu dans chaque espacement entre groupes imprimeurs voisins (2, 3), et dans lequel on sèche l'encre fraîchement imprimée en amenant de l'air, caractérisé en ce que chaque dispositif de séchage (7) présente une table de glissement (15), disposée dans le plan de guidage rectiligne de la bande (1), munie d'une surface de refroidissement (16) pour le côté non imprimé de la bande (1), et en ce que l'air de séchage est soufflé en direction de la surface de refroidissement.
2. Dispositif selon la revendication 1, caractérisé en ce que la table de glissement (15) présente des canaux à agent de refroidissement (18).
3. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que les canaux à agent de refroidissement (18) sont formés par des plaques profilées (17) disposées sur l'arrière de la table de glissement (15).
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que les canaux à agent de refroidissement (18) sont raccordés à un système de refroidissement avec échangeur thermique et pompe de circulation.
5. Dispositif selon une ou plusieurs des revendications 1 à 4, caractérisé en ce qu'en face de la surface de refroidissement (16) sont disposées plusieurs buses (12) pour l'amenée d'air de séchage.
6. Dispositif selon une ou plusieurs des revendications 1 à 5, caractérisé en ce que chaque dispositif de séchage (7) est logé dans une enveloppe (8) dont une paroi forme la surface de refroidissement (16).
7. Dispositif selon une ou plusieurs des revendications 1 à 6, caractérisé en ce que le dispositif de séchage, avec sa surface de refroidissement (16), est disposé pratiquement horizontalement.
8. Dispositif selon une ou plusieurs des revendications 1 à 6, caractérisé en ce que le dispositif de séchage (7), avec sa surface de refroidissement (16), est disposé sous un angle relativement à l'horizontale.
9. Dispositif selon une ou plusieurs des revendications 1 à 6, caractérisé en ce que le dispositif de séchage (7), avec sa surface de refroidissement (16), est disposé pratiquement verticalement.
10. Dispositif selon la revendication 9, caractérisé par deux dispositifs de séchage (7) disposés côte à côte et branchés à la suite l'uri de l'autre.
11. Dispositif selon une ou plusieurs des revendications 1 à 6, caractérisé en ce que le dispositif de séchage (7) présente plusieurs surfaces de refroidissement disposées dans différents plans.
12. Dispositif selon la revendication 11, caractérisé en ce que le dispositif de séchage (7) présente une surface de refroidissement verticale et, à la suite de celle-ci, une surface de refroidissement horizontale.
EP81101533A 1980-03-07 1981-03-04 Dispositif pour imprimer en plusieurs couleurs une bande en matière thermoplastique Expired EP0035741B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101533T ATE7124T1 (de) 1980-03-07 1981-03-04 Vorrichtung zum mehrfarbigen bedrucken thermoplastischer folienbahnen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3008703 1980-03-07
DE19803008703 DE3008703A1 (de) 1980-03-07 1980-03-07 Vorrichtung zum mehrfarbingen bedrucken thermoplastischer folienbahnen

Publications (2)

Publication Number Publication Date
EP0035741A1 EP0035741A1 (fr) 1981-09-16
EP0035741B1 true EP0035741B1 (fr) 1984-04-18

Family

ID=6096487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101533A Expired EP0035741B1 (fr) 1980-03-07 1981-03-04 Dispositif pour imprimer en plusieurs couleurs une bande en matière thermoplastique

Country Status (3)

Country Link
EP (1) EP0035741B1 (fr)
AT (1) ATE7124T1 (fr)
DE (2) DE3008703A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19521442A1 (de) * 1994-11-17 1996-05-30 Lts Trocknungsverfahren Gmbh Leiteinrichtung für bedruckte Bogen und/oder Bahnen in Trocknersystemen
DE29714455U1 (de) * 1997-08-13 1997-10-09 MAN Roland Druckmaschinen AG, 63075 Offenbach Trocknereinrichtung für Bedruckstoffe in einer Verarbeitungsmaschine
DE19651406C1 (de) * 1996-12-11 1998-06-10 Roland Man Druckmasch Trocknereinheit in einer Druckmaschine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2631584B1 (fr) * 1988-05-18 1991-01-18 Buy Stephane Procede et equipements d'impression serigraphique pour composants metalliques d'objets sensibles a la chaleur
DE59402139D1 (de) * 1993-12-16 1997-04-24 Sebald U E Trockenvorrichtung
DE19829383A1 (de) * 1998-07-01 2000-01-05 Koenig & Bauer Ag Leiteinrichtung in Druckmaschinen
JP2009073011A (ja) * 2007-09-20 2009-04-09 Seiko Epson Corp 液体噴射装置
EP2047991A3 (fr) * 2007-10-11 2011-11-16 manroland AG Dispositif de séchage à air thermique et procédé destiné à sécher une matière d'impression

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR675391A (fr) * 1928-05-19 1930-02-10 Procédé de séchage d'impressions polychromes
DE494113C (de) * 1927-07-22 1930-03-19 Edwin Nagelstein Dipl Ing Verfahren und Vorrichtung zum Trocknen der bedruckten Papierbahn bei Druckmaschinen,insbesondere Rotationstiefdruckmaschinen
DE622730C (de) * 1930-04-30 1935-12-05 Kadus Werk G M B H Vorrichtung zum Trocknen von mit Tiefdruckfarben bedruckten Papier- oder Stoffbahnenmittels kalter Blasluft
US2268988A (en) * 1939-08-08 1942-01-06 Interchem Corp Method and apparatus for drying printing ink
US2268985A (en) * 1937-12-29 1942-01-06 Interchem Corp Method and apparatus for drying printing ink
FR951972A (fr) * 1945-03-27 1949-11-07 Lampes Sa Procédé de séchage rapide par rayonnement infra-rouge
GB744343A (en) * 1952-11-04 1956-02-01 Svenska Vaxduks Aktiebolaget Improved apparatus for treating webs of thermoplastic material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH480175A (de) * 1969-04-21 1969-10-31 De La Rue Giori Sa Mehrfarben-Stahlstichdruckmaschine für Bogen, insbesondere für Wertscheine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE494113C (de) * 1927-07-22 1930-03-19 Edwin Nagelstein Dipl Ing Verfahren und Vorrichtung zum Trocknen der bedruckten Papierbahn bei Druckmaschinen,insbesondere Rotationstiefdruckmaschinen
FR675391A (fr) * 1928-05-19 1930-02-10 Procédé de séchage d'impressions polychromes
DE622730C (de) * 1930-04-30 1935-12-05 Kadus Werk G M B H Vorrichtung zum Trocknen von mit Tiefdruckfarben bedruckten Papier- oder Stoffbahnenmittels kalter Blasluft
US2268985A (en) * 1937-12-29 1942-01-06 Interchem Corp Method and apparatus for drying printing ink
US2268988A (en) * 1939-08-08 1942-01-06 Interchem Corp Method and apparatus for drying printing ink
FR951972A (fr) * 1945-03-27 1949-11-07 Lampes Sa Procédé de séchage rapide par rayonnement infra-rouge
GB744343A (en) * 1952-11-04 1956-02-01 Svenska Vaxduks Aktiebolaget Improved apparatus for treating webs of thermoplastic material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19521442A1 (de) * 1994-11-17 1996-05-30 Lts Trocknungsverfahren Gmbh Leiteinrichtung für bedruckte Bogen und/oder Bahnen in Trocknersystemen
DE19651406C1 (de) * 1996-12-11 1998-06-10 Roland Man Druckmasch Trocknereinheit in einer Druckmaschine
DE29714455U1 (de) * 1997-08-13 1997-10-09 MAN Roland Druckmaschinen AG, 63075 Offenbach Trocknereinrichtung für Bedruckstoffe in einer Verarbeitungsmaschine

Also Published As

Publication number Publication date
EP0035741A1 (fr) 1981-09-16
ATE7124T1 (de) 1984-05-15
DE3008703A1 (de) 1981-09-24
DE3163152D1 (en) 1984-05-24

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