EP0723498A1 - Cylindre rotatif d'impression serigraphique et son utilisation - Google Patents

Cylindre rotatif d'impression serigraphique et son utilisation

Info

Publication number
EP0723498A1
EP0723498A1 EP95930448A EP95930448A EP0723498A1 EP 0723498 A1 EP0723498 A1 EP 0723498A1 EP 95930448 A EP95930448 A EP 95930448A EP 95930448 A EP95930448 A EP 95930448A EP 0723498 A1 EP0723498 A1 EP 0723498A1
Authority
EP
European Patent Office
Prior art keywords
screen printing
printing cylinder
color
rotary screen
screen
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
EP95930448A
Other languages
German (de)
English (en)
Other versions
EP0723498B1 (fr
EP0723498B2 (fr
Inventor
Wittich Kaule
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.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6525587&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0723498(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Priority to SI9530371T priority Critical patent/SI0723498T1/xx
Publication of EP0723498A1 publication Critical patent/EP0723498A1/fr
Publication of EP0723498B1 publication Critical patent/EP0723498B1/fr
Application granted granted Critical
Publication of EP0723498B2 publication Critical patent/EP0723498B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/14—Forme preparation for stencil-printing or silk-screen printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0831—Machines for printing webs
    • B41F15/0836—Machines for printing webs by means of cylindrical screens or screens in the form of endless belts

Definitions

  • the invention relates to a rotary screen printing cylinder, consisting of a cylindrical screen which has at least one zone which is provided with color-permeable openings at least in some areas, a doctor blade arranged inside the screen and two end pieces, each are attached to the ends of the sieve in an extension of the cylindrical surface.
  • the invention also relates to a system of such
  • the ink is generally applied using a squeegee through a stretched screen surface
  • Plastic or metal mesh of a predetermined mesh size pressed, the mesh being impermeable to color in the non-printing areas.
  • the stitches are usually closed photographically by coating the screen material with a photo emulsion and exposing it to the desired artwork. The exposed areas are washed away during the subsequent development of the emulsion, so that the screen on the exposed areas becomes color-permeable.
  • a screen printing unit consists of a metal or wooden frame in which the screen material is clamped without distortion.
  • rotary screen printing units were developed which allow continuous printing of continuous webs.
  • the screen is no longer flat here, but is shaped as a cylindrical jacket, in the interior of which the paint doctor is attached.
  • the cylindrical sieve is produced, for example, by appropriately shaping a plastic or metal mesh, which is then welded along the surface of the jacket. This weld However, it creates problems during the printing process, which is why rotary screen printing cylinders are very often manufactured galvanically, since a uniform screen surface can be achieved in this manufacturing process.
  • EP 0 164 149 describes such a production method.
  • An electrically conductive screen template is placed in an electrolytic bath and connected to the cathode of a current generator. Thereupon a metal layer is deposited on the template, which is then removed from the template and patterned. Before sampling, the screen material has a uniform perforation, which must be made impervious to color for the printing process in the non-printing areas. This is usually done using the photographic methods already mentioned.
  • EP 0 338 612 A1 describes such a method for rotary screen printing cylinders.
  • the sieve likewise consists of a perforated metal cylinder, which is glued to one end piece in each case before the patterning in extension of the cylindrical outer surface.
  • the permanently mounted end pieces allow simple and quick replacement of the printing cylinder in the printing unit, which is particularly useful for short print runs. Only after the connection elements have been glued to the screen is the latter coated with the photoemulsion and exposed as usual. As soon as a new print pattern is required, the unexposed photo emulsion, which closes the non-printing areas of the uniformly perforated screen, can be removed and the screen can be coated and exposed again.
  • the print resolution in screen printing depends solely on the mesh size and the thread or wire thickness of the screen from. The finer the mesh, the greater the print resolution. Since round screens with mesh sizes of approximately 120 / cm are used for high resolutions and such a mesh fabric is extremely unstable, high-resolution screens can only be produced with small effective printing widths (so-called working widths) of less than 60 cm if the stability is sufficient Printing roller should be guaranteed.
  • the invention is therefore based on the object of proposing a rotary screen printing cylinder which can be produced simply and inexpensively and nevertheless enables the processing of large printing widths.
  • the invention is based on the basic idea that the printing areas of the screen are separated from one another by extensive non-printing dead zones and that these dead zones are designed in such a way that the printing cylinder has sufficient stability.
  • the screen printing cylinder can be designed as a uniformly perforated cylinder jacket, with reinforcement rings being provided in the interior of the cylinder at certain intervals.
  • This reinforced area forms the above-mentioned dead zone and, of course, must not be exposed during the subsequent sampling, ie designed to be translucent.
  • a second printing cylinder can be produced which, in a second printing process, prints in register in this gap and thus supplements the printed image.
  • Another possibility of giving the printing cylinder stability is to design the printing cylinder to be sieve-shaped only in the printing areas.
  • the screen cylinder consists of a non-perforated, compact base material, such as metal, sheet metal or plastic, which is provided with the openings of a predetermined diameter corresponding to the desired print image in the zones to be designed to be transparent.
  • the screen holes can be burned or etched into the material with a laser. A galvanic production of the screen is of course also possible.
  • the zones provided with the color-permeable openings are separated from one another by the non-perforated dead zones made of base material.
  • a further embodiment according to the invention provides for the production of individual fine-mesh rotary screen printing cylinders with a small printing width and for connecting these printing cylinders to one another along their axes, so that almost any web widths of printing material can be processed.
  • the metallic end pieces of the printing cylinder which represent the connecting elements for driving the printing unit, are replaced on at least one side by a correspondingly shaped connecting element, for example a flange.
  • the first and last pressure cylinder of such a row naturally still has the corresponding known connecting element for driving the machine.
  • a plurality of pressure cylinders can be arranged between these two pressure cylinders, which are provided on both sides with a flange-shaped end piece.
  • the non-printing dead zones in the area of the flange elements can result in gaps in the printed image, which can be supplemented with the aid of a second printing cylinder.
  • the end pieces can be, for example, simple tubular elements that are welded together.
  • the connecting elements between the screen areas can also be made from one piece, so that there is basically a single screen printing cylinder, the screen area of which is interrupted at certain points by the supporting connecting elements.
  • the individual printing cylinders can of course be designed as desired.
  • one of the cylinders can consist of a solid material that is only sieve-shaped in certain zones, while another consists of a mesh fabric patterned in the usual way.
  • the invention accordingly offers the possibility of producing a rotary screen printing cylinder with an arbitrary axial cylinder length, which, due to the reinforced Zones have good stability regardless of the size of the openings of the printing screen area.
  • the printing zones of the screen can be optimally adapted to the needs, e.g. B. with regard to the pressure resolution.
  • the separation into printing ink-permeable zones and ink-opaque dead zones also offers the advantage that several colors can be printed side by side in one printing process. Unless the reinforcement of the
  • pressure zones are formed by separate elements, such as reinforcing rings or flanges, these elements can simultaneously serve as color dividers which prevent the colors from converging.
  • the rotary screen printing cylinders according to the invention can also be used particularly advantageously in security printing. Especially in the production of banknotes, it is often necessary to separate individual paper areas with special colors, e.g. For example, with fluorescence, Magnets' toffen or iridescent pigments are added to print. According to the invention, a single printing cylinder can be used for the application of these different color areas. For this purpose, the printing cylinder is divided into several color-permeable zones which are separated by appropriately designed dead zones which are color-impermeable over the entire cylinder circumference. The color-permeable zones are patterned according to the desired print image and then brought into contact with the respective color.
  • special colors e.g. For example, with fluorescence, Magnets' toffen or iridescent pigments are added to print.
  • a single printing cylinder can be used for the application of these different color areas.
  • the printing cylinder is divided into several color-permeable zones which are separated by appropriately designed dead zones which are color-impermeable over
  • varnishes or adhesives can of course also be printed in a specific pattern. So it would be z. B. conceivable to apply one or more effect colors and a locally limited lacquer or adhesive layer to the security paper in one printing process. In the area of the adhesive layer, a further security element such as e.g. B. a hologram or an interference layer element are attached.
  • a further security element such as e.g. B. a hologram or an interference layer element are attached.
  • FIG. 6 longitudinal section through a further variant according to the invention.
  • a security 10 e.g. B. a banknote made of security paper, which has several security features 1, 2, 3.
  • Features 1, 2 are printed features that have been applied by screen printing.
  • the printing inks used are not subject to any restrictions and can contain, in addition to color pigments, feature substances such as fluorescent or magnetic pigments or only the features dispersed or dissolved in a binder. coloring materials. Iridescent interference layer pigments are also conceivable, which show a striking viewing angle-dependent color effect.
  • the security feature 3, on the other hand can be a multilayer element, such as a hologram or a coated plastic thread, which is attached to the security paper film with the aid of an adhesive or lacquer layer.
  • the security paper can of course other security features such. B. have an embedded security thread or the like.
  • Fig. 2 illustrates the principle of screen printing when using rotary screen printing cylinders.
  • the screen printing cylinder 4 is only translucent in the area of the print pattern to be transferred, while the remaining portion of the screen is made opaque.
  • a squeegee 5 is fastened within the impression cylinder 4, which generally consists of a wooden or metal rod 6 which runs in the axial direction of the impression cylinder 4 and on which a rubber or plastic strip, the actual squeegee element 7, extends in the radial direction is attached.
  • the doctor element 7 presses the ink 8 also introduced into the interior of the printing cylinder 4 through the permeable openings in the cylinder 4.
  • the ink transfer to the printing material 9, e.g. B. paper or plastic takes place in the area of the counter-pressure roller 11.
  • a chamber doctor blade 12 can also be used, the operation of which is illustrated in FIG. 3.
  • the chambered doctor blade 12 consists of two rubber or plastic lips 13, 14 which rest on the inside of the screen printing cylinder 4 and press the ink 8 through the screen openings.
  • the opposite ends of the lips 13, 14 are connected to a sealed housing 15, in which the paint 8 is pumped in electronically controlled via a valve 16.
  • FIG. 4 schematically shows a patterned rotary screen printing cylinder 20 according to the invention, with which the printing inks for the areas 1, 2 shown in FIG. 1 and for the adhesive layer of the element 3 can be applied in a single printing operation .
  • the cylindrical jacket surface 21 is divided along the axis of rotation a into color-permeable or at least partially color-permeable zones 22 and color-opaque dead zones 23 arranged between them, each of which extends rotationally symmetrically over the jacket surface.
  • These zones 22, 23 are defined solely by the presence or absence of color-permeable openings in the cylinder jacket 21.
  • the dashed lines 24 are therefore only for clarity and are not present on the impression cylinder 20.
  • the color-permeable openings in the areas 25 represent the actual screen, since only through them can the ink reach the printing material.
  • the color-permeable openings can be created in different ways.
  • a compact, ie not yet perforated plastic, metal or sheet material can be used for the screen cylinder 21, into which the desired openings are made by means of an electronically controlled laser.
  • the dead zones 23 consist of non-perforated solid material, which gives the pressure cylinder 20 sufficient strength gives, so that no additional reinforcing elements are necessary in this area.
  • the printing cylinder 20 is produced by means of etching techniques or galvanically.
  • etching technique for. B. a sheet with an acid-resistant coating that covers all areas except for the screen openings to be generated. The coated sheet is then brought into an etching liquid which attacks and dissolves the exposed, uncoated metal surfaces.
  • a regular mesh fabric preferably made of metal wires, can also be used, as has been customary hitherto.
  • the mesh opening is usually about 1.5 to 2.5 times the wire diameter.
  • Fig. 5 shows a pressure cylinder 30, the outer surface of which consists of a regular mesh, which is not shown for reasons of clarity.
  • the cylinder jacket 31 is also subdivided along the axis of rotation a into color-permeable zones 32 and color-impermeable dead zones 33. The zone boundaries are again indicated by the dashed lines 34.
  • the dead zones 33 which also have openings in this embodiment, are provided with reinforcing elements, here reinforcing rings 35, in order to increase the stability inside the printing cylinder 30. These can be worked directly into the material or glued on.
  • the entire cylinder 31 is coated with photoemulsion and at least partially exposed in the zones 32. The exposed areas are finally washed away, so that the mesh fabric is exposed and translucent at these points.
  • FIG. 6 shows a longitudinal section through two flanged rotary screen printing cylinders 40, 50 according to the invention.
  • the printing cylinders 40, 50 On the side facing the printing unit, the printing cylinders 40, 50 have the usual end pieces 41 and 42, which ensure the connection to the drive system 43 of the printing unit.
  • These elements 41, 42 are of course also present in the embodiments described above, even if they are not shown in the figures.
  • the opposite ends of the screen cylinders 40, 50 are provided with flange elements 44, by means of which the pressure cylinders 40, 50 are connected to one another.
  • the flange elements 44 can in this case possibly be equipped with a sealing ring or a guide groove in order to ensure that the pressure cylinders are brought together in register.
  • additional printing cylinders can be arranged between the printing cylinders 40, 50, which are provided on both sides with flange elements 44 and can thus be connected to the printing cylinders 40, 50 in the axial direction.
  • the squeegee 45 in this case consists of a squeegee rod 46 which is common to all printing cylinders 40, 50 and which is provided in the area of the individual printing cylinders 40, 50 with the actual squeegee elements 47 which ensure the ink transfer to the printing material.
  • the same doctor blade arrangement can of course be used in the embodiment described with reference to FIG. 5.
  • the counter-pressure roller 48 will also expediently run over the entire printing width.
  • the printing screen consisting of the individual screens 40, 50 can be supported in the printing unit by support rollers.
  • connection elements that are less easy to not detachable at all can also be used at arbitrary locations. So for example wise conceivable to provide one or more of the individual pressure cylinders with different end pieces. If, for example, 2 out of 4 individual printing cylinders are to be connected to one another in a non-detachable manner, a one-piece connecting element can be provided between them, while the connecting elements to the remaining two individual cylinders may be designed as flange elements.
  • connection of the first two sieve elements, which are connected by the one-piece connecting element expediently takes place prior to the sampling of the sieves, since the connecting element made from one piece serves as a stabilizing end piece for both sieves.
  • the reverse procedure, however, of producing and sampling the screens individually without the common connecting element and then inserting the connecting element between the screen elements may also be appropriate under certain circumstances, e.g. B. if the existing machine equipment for the production of the sieves is not designed for the length of the connected sieve elements.
  • the invention also makes it possible to print several colors in parallel if the color-permeable zones are each brought into contact with a different color. It is of course important to ensure that the different printing inks do not mix. If reinforcement elements, such as reinforcement rings or flange elements, are introduced into the non-printing dead zones, these can simultaneously function as color dividers. In the embodiments according to FIGS. 5 and 6, it is therefore easily possible to form separate sieve chambers into which the color may be e.g. B. can be introduced by means of separate electrical pumping systems.
  • the invention can also be used well wherever colors are printed very finely and over large widths, such as in the printing of plastic films, which are then cut into narrow strips with a width in the range of a few mm and are embedded in security paper as security threads. Such threads very often have a micro-lettering that must be legibly printed on the wide film web at appropriate intervals. Until now, this was only possible in gravure printing, which made the production costs more expensive in view of the complicated and expensive printing plate production.
  • the invention can of course also be used just as advantageously when printing security documents made of plastic, such as B. Use ID cards.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
  • Pens And Brushes (AREA)
  • Printing Methods (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rotary Presses (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Road Signs Or Road Markings (AREA)
  • Massaging Devices (AREA)
  • Display Devices Of Pinball Game Machines (AREA)

Abstract

Un cylindre rotatif d'impression sérigraphique comprend un écran cylindrique, une racle située à l'intérieur de l'écran et deux pièces terminales assujetties aux extrémités de la surface extérieure cylindrique de l'écran. Le cylindre d'impression sérigraphique comprend au moins deux zones pourvues au moins en partie d'orifices laissant passer l'encre et séparées par une zone morte de largeur prédéterminée imperméable à l'encre. La zone morte sert à stabiliser le cylindre d'impression sérigraphique.
EP95930448A 1994-08-12 1995-08-11 Cylindre rotatif d'impression serigraphique et son utilisation Expired - Lifetime EP0723498B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9530371T SI0723498T1 (en) 1994-08-12 1995-08-11 Rotary screen printing cylinder and its use

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4428670 1994-08-12
DE4428670A DE4428670B4 (de) 1994-08-12 1994-08-12 Rotations-Siebdruckzylinder
PCT/EP1995/003199 WO1996005058A1 (fr) 1994-08-12 1995-08-11 Cylindre rotatif d'impression serigraphique et son utilisation

Publications (3)

Publication Number Publication Date
EP0723498A1 true EP0723498A1 (fr) 1996-07-31
EP0723498B1 EP0723498B1 (fr) 2000-03-22
EP0723498B2 EP0723498B2 (fr) 2005-10-19

Family

ID=6525587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95930448A Expired - Lifetime EP0723498B2 (fr) 1994-08-12 1995-08-11 Cylindre rotatif d'impression serigraphique et son utilisation

Country Status (11)

Country Link
US (1) US6155165A (fr)
EP (1) EP0723498B2 (fr)
AT (1) ATE190909T1 (fr)
DE (2) DE4428670B4 (fr)
DK (1) DK0723498T3 (fr)
ES (1) ES2143066T3 (fr)
FI (1) FI116371B (fr)
GR (1) GR3033483T3 (fr)
NO (1) NO310449B1 (fr)
PT (1) PT723498E (fr)
WO (1) WO1996005058A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19819571A1 (de) * 1998-04-30 1999-11-04 Giesecke & Devrient Gmbh Wertdokument mit Sicherheitselement
DE20116246U1 (de) * 2001-10-04 2002-03-28 Textilma Ag Rotations-Siebdruckvorrichtung für textile Flächengebilde
JP5069896B2 (ja) * 2006-10-23 2012-11-07 株式会社小森コーポレーション 液体供給装置
JP4969362B2 (ja) * 2007-08-06 2012-07-04 株式会社小森コーポレーション 液体供給装置
DE102011105739A1 (de) 2011-06-24 2012-12-27 Baumer Hhs Gmbh Verfahren zur Herstellung von Selbstklebeetiketten und dazu gehörige Vorrichtung
US11465405B2 (en) * 2013-04-10 2022-10-11 Voith Patent Gmbh Device for generating a pattern on a clothing for a machine for manufacturing a web material
EP3390061B1 (fr) * 2015-12-18 2020-06-10 3M Innovative Properties Company Procédé de dépôt de particules de poudre sèche sur un substrat et de fixation des particules sur le substrat
WO2017106613A1 (fr) 2015-12-18 2017-06-22 3M Innovative Properties Company Procédé de dépôt de particules de poudre sèche sur un substrat et de fixation des particules par collage sur le substrat
CN111688338A (zh) * 2020-04-03 2020-09-22 绍兴永通印花有限公司 异花同步双幅印花机
CN113910759B (zh) * 2021-10-12 2023-04-25 普宁市南鹰科技实业有限公司 一种圆网印花用控温印花系统

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Also Published As

Publication number Publication date
US6155165A (en) 2000-12-05
DE4428670B4 (de) 2004-04-01
FI116371B (fi) 2005-11-15
WO1996005058A1 (fr) 1996-02-22
FI961614A (fi) 1996-04-12
EP0723498B1 (fr) 2000-03-22
FI961614A0 (fi) 1996-04-12
GR3033483T3 (en) 2000-09-29
NO961437L (no) 1996-06-11
DE59508058D1 (de) 2000-04-27
DK0723498T3 (da) 2000-07-17
ATE190909T1 (de) 2000-04-15
NO961437D0 (no) 1996-04-11
ES2143066T3 (es) 2000-05-01
DE4428670A1 (de) 1996-02-15
EP0723498B2 (fr) 2005-10-19
PT723498E (pt) 2000-09-29
NO310449B1 (no) 2001-07-09

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