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WO2001038101A1 - Appareil et procede permettant de secher des encres d'intaglio aux ultraviolets - Google Patents

Appareil et procede permettant de secher des encres d'intaglio aux ultraviolets Download PDF

Info

Publication number
WO2001038101A1
WO2001038101A1 PCT/AU2000/001415 AU0001415W WO0138101A1 WO 2001038101 A1 WO2001038101 A1 WO 2001038101A1 AU 0001415 W AU0001415 W AU 0001415W WO 0138101 A1 WO0138101 A1 WO 0138101A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheets
radiation
source
sheet transport
transport surface
Prior art date
Application number
PCT/AU2000/001415
Other languages
English (en)
Inventor
Satish Varma
Danny Reid
Richard Stephens
Robert Neil
Ana Ghioghiu
Original Assignee
Note Printing Australia Limited
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 Note Printing Australia Limited filed Critical Note Printing Australia Limited
Priority to AU13735/01A priority Critical patent/AU1373501A/en
Publication of WO2001038101A1 publication Critical patent/WO2001038101A1/fr

Links

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
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B41F23/0409—Ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • 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
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/0443—Drying sheets, e.g. between two printing stations after printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/10—Intaglio printing ; Gravure printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat

Definitions

  • This invention relates to an apparatus and method for curing Intaglio inks applied to sheets in the printing of banknotes or other documents.
  • Intaglio printing is a process whereby an image is transferred to a paper or other substrate from a plate with recessed portions, where printing ink is located in the recessed portions of the plate. After transfer of the printing ink to the paper or other substrate the ink may be dried either under ambient conditions or under forced drying conditions of elevated temperatures and/or increased air flow. It is also possible for the printing ink to dry or cure by undergoing chemical reactions.
  • the Intaglio technique is well known and produces high quality images that can be used for the manufacture of banknotes and other documents as well as for artworks.
  • One of the features of the Intaglio printing technique is that the film build of the printing ink that is transferred to the paper or other substrate may vary from a few microns to fifty microns or more. This ability to vary the film build is a desirable feature of Intaglio printing and may be used to advantage to produce embossing and other desirable features.
  • apparatus for curing Intaglio inks applied to sheets of substrate comprising: a source of ultra violet (UV) radiation; a sheet transport means having a transport surface on which printed sheets of substrate to which UV curable Intaglio ink has been applied are transported past said source of UV radiation; wherein the apparatus includes vacuum means to hold the sheets of substrate on said transport surface of the sheet transport means.
  • UV ultra violet
  • a method of curing Intaglio inks applied to sheets of substrate comprising: providing a source of ultra violet (UV) radiation; transporting sheets of substrate printed with UV curable Intaglio ink on a transport surface past said source of UV radiation to cure the ink on the substrate; and applying vacuum suction to the sheets of substrate to hold the sheets on the transport surface as they are transported past the source of UV radiation.
  • UV radiation ultra violet
  • the sheet transport surface is a peripheral transport surface on a rotatable drum on which the sheets of substrate are transported past the source of UV radiation.
  • the peripheral transport surface preferably has a plurality of holes or apertures therein connected to a vacuum source of the vacuum means.
  • the curing apparatus may also include guide means for holding sheets in position on the transport surface.
  • the curing apparatus may further include blower means for blowing air onto the printed surface of the sheets which assist in smoothing the sheets held on the transport surface.
  • the source of UV radiation preferably comprises one of more UV lamps located in close proximity to the transport surface for rapid and effective UV curing of the Intaglio ink on the substrate.
  • the UV lamps may also emit some infra red (IR) radiation.
  • the apparatus may also include cooling means for the sheet transport means.
  • Figure 1 is a schematic side view of an Intaglio printing system incorporating UV curing apparatus in accordance with the invention
  • Figure 2 is a schematic view from the opposite side of the UV curing apparatus
  • FIG. 3 is a schematic view of the vacuum distribution manifold for the UV curing apparatus.
  • Figure 4 is a schematic view of the air pump apparatus for the vacuum system and blowers of the apparatus.
  • the Intaglio printing system shown in Figure 1 comprises a feed station 1 for feeding sheets of substrate 2 to an inking station 3 for applying one or more UV curable Intaglio inks to the substrate, a UV curing station 4 including UV curing apparatus in accordance with the invention, and a delivery section 5 at which sheets of printed substrate are stacked for transfer to a work in progress store to allow the curing process to continue.
  • the system also includes a first sheet delivery conveyor 6 for conveying printed sheets of substrate from the inking station 3 to the UV curing station 4, and a second sheet delivery conveyor 7 for conveying sheets of substrate from the curing station 4 to the delivery section 5.
  • Typically, when used conventionally "set-off" is adequate to allow about 250 sheets of printed substrate to be stacked at the delivery section 5.
  • the UV curing apparatus at the UV curing station 4 comprises a rotatable cylindrical transfer drum 10 having a peripheral outer cylindrical surface which forms a sheet transport surface 12, a source of UV radiation 20, preferably in the form of two UV curing lamps 21, 22 and a vacuum and blower system.
  • the transfer drum 10 serves the purpose of transporting sheets printed with Intaglio inks from the first, upper sheet delivery conveyor 6 past the UV curing lamps 21, 22 to the second, lower sheet delivery conveyor 7.
  • the UV curing lamps 21, 22 are preferably 1ST high intensity UV lamps each having a maximum output of 800 watts per cm.
  • the UV lamps For effective UV curing of the Intaglio inks on the printed sheets, it is necessary for the UV lamps to be disposed in close proximity to the sheets on the transport surface 12, for example at a distance of approximately 12 mm from the sheets. Also, for an even curing of the inks on the sheets it is necessary to maintain the sheets securely and smoothly on the transfer drum 10 at a substantially constant distance away from the UV lamps 21, 22.
  • high intensity UV lamps have an integral air extraction system which can tend to cause the printed sheets to lift away from the transport surface 12 of the transfer drum 10. If the printed sheets were to come into contact with the lamp housing, tubes and reflectors of the UV lamps 21, 22 they could cause damage and contamination.
  • the vacuum suction and blower system has been incorporated into the UV curing apparatus to alleviate these disadvantages.
  • the sheet transport surface 12 of the transfer drum 10 has a plurality of sheet holding segments 14, each of which is perforated with a plurality of apertures connected by flexible hoses 16 to respective ports 32 on a rotatable vacuum distribution manifold 31 located within the transfer drum 10.
  • a rotatable vacuum distribution manifold 31 located within the transfer drum 10.
  • the rotatable vacuum distribution manifold 31 is mounted on a central rotatable shaft 18 of the transfer drum 10 so as to be rotatable with the transfer drum 10.
  • the rotating distribution manifold 31 is preferably of split construction 33 to allow retro-fitting to the non-drive end of the transfer drum shaft 18.
  • a stationary vacuum supply manifold 34 having ports 36 connected to the blower or air pump 40 shown in Figure 4.
  • the stationary supply manifold 34 has close fitting skirts 38 and is manufactured in such a way as to have nominal running clearance to the rotating distribution manifold 31 which creates minimal vacuum leakage. This allows positive system operation by allowing transference of significant vacuum flow through the vacuum union arrangement but without any wearing components.
  • Two, large bore flexible hoses run from the four ports 36 on the stationary supply manifold 34 to the vacuum pump intake manifold 42 mounted to the side channel blower 40 providing the vacuum source for the system.
  • the stationary vacuum supply manifold 34 extends partially around the circumference of the rotatable distribution manifold 31 for a distance slightly greater than segments of the rotatable manifold 31 containing six of the ports 32 connected to the apertures in one of the sheet holding segments 14 of the drum 12.
  • the arrangement is such that vacuum suction is applied to the sheet holding segments 14 as they pass the UV curing lamps 21, 22.
  • the curing apparatus also includes blower means 50 for blowing air onto the printed surface of the sheets on the transfer drum 10 for smoothing the sheets held on the transport surface 12 of the drum 10 by the vacuum system.
  • the blower means 50 comprises a pair of air blower bars 51 and 52 disposed around the circumference of the transfer drum 10 on either side of the UV lamps 21 and 22.
  • Each of the air blower bars 51, 52 has an intake port 54 at one end connected to an air pressure outlet manifold 44 of the air pump 40 via a flow control valve (not shown).
  • Each air blower bar 51, 52 has a continuous outer part-cylindrical surface 56 and a perforate inner part-cylindrical surface 58 having a plurality of apertures 59 therein for directing air under a positive pressure onto the sheets of substrate held on the transfer drum 10 by the vacuum system.
  • the sizing of the manifold chambers, vacuum lines and configuration of the customised facing perforation pattern and porting arrangements is important in being able to draw a vacuum suitably quickly for the sheet to be secured flat against the surface of the drum, ensuring no wrinkles.
  • the performance of the upper air bar 51 in the region where the sheet initially lays down on the drum surface 12 is critical in ensuring the establishment of the flat sheets on the drum surface 12 is not compromised.
  • the lower air bar 52 also assists in smoothing the sheets of substrate on the drum surface for an even curing of the Intaglio inks on the printed sheets.
  • the air bars 51, 52 may be arranged to blow air onto the sheets of substrate in a radial direction perpendicular to the sheets on the transfer drum 10.
  • the upper air bar 51 directs air onto the sheets in a substantially perpendicular direction and the apertures 59 in the lower air bar 52 are arranged to blow air onto the sheets at an angle between the radial and tangential directions for more effective smoothing of the sheets.
  • the apparatus may also include a vacuum pressure switch (not shown) installed in the vacuum circuit of the system as a safeguard against the system being operated without the vacuum system running. The switch provides an input into the 1ST UV lamp control system to shut down if the vacuum switch is not made.
  • the UV lamp system will also shut down, helping to avoid damage to the lamps.
  • the type of UV radiation is not critical to the working of the present invention. However, it is preferred that the UV radiation is combined with some thermal heating. In practice it is desirable for the curing/drying to take place at approximately 80°C. While a secondary heat source may be used to achieve this heating we have found it convenient to use a UV source that has a significant infra-red component to allow this desired thermal heating.
  • the curing apparatus may also include a cooling means, such as an air or liquid cooling arrangement for cooling the drum 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Printing Methods (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

L'invention concerne un procédé et un appareil permettant de sécher aux ultraviolets des encres d'intaglio appliquées sur des feuilles de substrat (2). Les feuilles imprimées sont transportées derrière au moins une lampe de séchage (21, 22) aux ultraviolets sur la surface de transport (12) de feuille d'un tambour de transfert (10) rotatif. La surface de transport (12) possède un ensemble d'ouvertures (13) reliées à un système de vide (16, 31, 32, 34, 36, 40), de façon à maintenir en douceur les feuilles sur le tambour rotatif (10). L'appareil comprend également des barres de ventilateur (51,52) agencées de façon à orienter l'air sur la surface imprimée du substrat (2), de façon à maintenir en douceur les feuilles du substrat sur la surface de transport (12).
PCT/AU2000/001415 1999-11-24 2000-11-20 Appareil et procede permettant de secher des encres d'intaglio aux ultraviolets WO2001038101A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU13735/01A AU1373501A (en) 1999-11-24 2000-11-20 Apparatus and method for UV curing of intaglio printing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPQ4229 1999-11-24
AUPQ4229A AUPQ422999A0 (en) 1999-11-24 1999-11-24 Apparatus and method for uv curing of intaglio printing

Publications (1)

Publication Number Publication Date
WO2001038101A1 true WO2001038101A1 (fr) 2001-05-31

Family

ID=3818373

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2000/001415 WO2001038101A1 (fr) 1999-11-24 2000-11-20 Appareil et procede permettant de secher des encres d'intaglio aux ultraviolets

Country Status (2)

Country Link
AU (2) AUPQ422999A0 (fr)
WO (1) WO2001038101A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1400353A1 (fr) * 2002-09-19 2004-03-24 Kba-Giori S.A. Machine d'impression en creux
WO2010028462A1 (fr) 2008-09-15 2010-03-18 Laurent De Volder Procédé d’impression ou de marquage temporaire d’objets et dispositif associé
US20150035268A1 (en) * 2012-03-23 2015-02-05 Sicpa Holding Sa Printing method with oxidative-drying intaglio ink and uv-vis-curable intaglio inks
CN111791611A (zh) * 2019-04-02 2020-10-20 海德堡印刷机械股份公司 用于使承印材料上的uv油墨硬化的设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3795934A1 (fr) * 2019-09-17 2021-03-24 Heidelberger Druckmaschinen AG Procédé de durcissement de l'encre sur un matériau à imprimer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1469717A (en) * 1974-06-13 1977-04-06 Thailand Bank Of Printing inks
EP0073669A1 (fr) * 1981-09-02 1983-03-09 American Screen Printing Equipment Company Dispositif de séchage
US4646446A (en) * 1985-11-04 1987-03-03 American Screen Printing Equipment Company UV curing apparatus
EP0432093A1 (fr) * 1989-12-07 1991-06-12 Sicpa Holding S.A. Encres d'impression hautement réactives

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1469717A (en) * 1974-06-13 1977-04-06 Thailand Bank Of Printing inks
EP0073669A1 (fr) * 1981-09-02 1983-03-09 American Screen Printing Equipment Company Dispositif de séchage
US4646446A (en) * 1985-11-04 1987-03-03 American Screen Printing Equipment Company UV curing apparatus
EP0432093A1 (fr) * 1989-12-07 1991-06-12 Sicpa Holding S.A. Encres d'impression hautement réactives

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1400353A1 (fr) * 2002-09-19 2004-03-24 Kba-Giori S.A. Machine d'impression en creux
WO2004026580A1 (fr) * 2002-09-19 2004-04-01 Kba-Giori S.A. Machine d'impression en taille-douce
WO2010028462A1 (fr) 2008-09-15 2010-03-18 Laurent De Volder Procédé d’impression ou de marquage temporaire d’objets et dispositif associé
BE1019729A5 (nl) * 2008-09-15 2012-12-04 Volder Laurent De Werkwijze voor tijdelijke bedrukking of markering van voorwerpen en inrichting hiervoor.
US20150035268A1 (en) * 2012-03-23 2015-02-05 Sicpa Holding Sa Printing method with oxidative-drying intaglio ink and uv-vis-curable intaglio inks
EP2828090B1 (fr) 2012-03-23 2016-05-11 Sicpa Holding SA Procédé d'impression à encre en creux à séchage oxydatif et encre en creux durcissables aux uv-vis
EP2828090B2 (fr) † 2012-03-23 2019-08-14 Sicpa Holding Sa Procédé d'impression à encre en creux à séchage oxydatif et encre en creux durcissables aux uv-vis
US10611184B2 (en) * 2012-03-23 2020-04-07 Sicpa Holding Sa Printing method with oxidative-drying intaglio ink and uv-vis-curable intaglio inks
US10703127B2 (en) 2012-03-23 2020-07-07 Sicpa Holding Sa Printing method with oxidative-drying intaglio ink and UV-VIS-curable intaglio inks
CN111791611A (zh) * 2019-04-02 2020-10-20 海德堡印刷机械股份公司 用于使承印材料上的uv油墨硬化的设备
CN111791611B (zh) * 2019-04-02 2023-07-21 海德堡印刷机械股份公司 用于使承印材料上的uv油墨硬化的设备

Also Published As

Publication number Publication date
AUPQ422999A0 (en) 1999-12-16
AU1373501A (en) 2001-06-04

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