EP0420234A2 - Presse pour impression en plusieurs couleurs - Google Patents

Presse pour impression en plusieurs couleurs Download PDF

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Publication number
EP0420234A2
EP0420234A2 EP90118562A EP90118562A EP0420234A2 EP 0420234 A2 EP0420234 A2 EP 0420234A2 EP 90118562 A EP90118562 A EP 90118562A EP 90118562 A EP90118562 A EP 90118562A EP 0420234 A2 EP0420234 A2 EP 0420234A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
printing
blanket
cylinders
plate
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.)
Withdrawn
Application number
EP90118562A
Other languages
German (de)
English (en)
Other versions
EP0420234A3 (en
Inventor
Hitoshi C/O Sekiyado Plant Komori Co. Funada
Toshio C/O Sekiyado Plant Komori Co. Hoshi
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.)
Komori Corp
Original Assignee
Komori Corp
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 Komori Corp filed Critical Komori Corp
Publication of EP0420234A2 publication Critical patent/EP0420234A2/fr
Publication of EP0420234A3 publication Critical patent/EP0420234A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/10—Rotary lithographic machines for offset printing using one impression cylinder co-operating with several transfer cylinders for printing on sheets or webs, e.g. satellite-printing units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F11/00—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination
    • B41F11/02—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities

Definitions

  • the present invention relates to a multicolor printing press and, more particularly, to a multicolor printing press for printing ground tint images of securities such as banknotes and stocks and bonds.
  • a conventional offset printing press has been generally used to print a fine printing image in, for example, ground tint printing for securities such as banknotes, and stocks and bonds.
  • a conventional printing press of this type has a pair of blanket cylinders which are in rolling contact with each other and each of which has a diameter twice that of a plate cylinder.
  • a plurality of plate cylinders as satellite cylinders are in rolling contact with the circumferential surface of each blanket cylinder.
  • a printing image forming unit is arranged for each plate cylinder.
  • a paper feed transfer cylinder and a paper delivery transfer cylinder are in rolling contact with the circumferential surface of the upstream blanket cylinder.
  • a sheet fed on a feedboard by a sheet feeder is fed to the upstream blanket cylinder through swing pre-grippers and the paper feed transfer cylinder upon gripping of grippers and is then delivered to a delivery unit by delivery chains looped around a sprocket coaxial with the delivery cylinder upon further gripping of grippers.
  • a printing image i.e., a pattern is formed on a plate of each plate cylinder by the corresponding printing image forming unit.
  • the patterns of all the plates are transferred to both the blanket cylinders.
  • These printing images are transferred to both surfaces of the sheet which receives a printing pressure from the blanket cylinders when it passes between the blanket cylinders, thereby performing printing.
  • the printing image forming unit comprises an inking unit and a dampening unit.
  • a large amount of alcohol is mixed in water supplied to a dampening stab in the dampening unit to quickly dry the water film transferred to a blanket mounted on the circumferential surface of each blanket cylinder, or inks having different densities are used in conventional arrangements.
  • These countermeasures can cope with only transfer at a maximum of three times.
  • planographic plates are used in all four plate cylinders, it is almost difficult to obtain satisfactory printed matters. Since the number of plates tends to be increased to prevent more sophisticated counterfeits, a strong demand has thus arisen for developing a printing press capable of planographic printing of four or more colors.
  • a multicolor printing press comprising an impression cylinder, a plurality of blanket cylinders juxtaposed in a circumferential direction of the impression cylinder and arranged in rolling contact with a circumferential surface of the impression cylinder, a plurality of plate cylinders juxtaposed in a circumferential direction of each of the plurality of blanket cylinders and arranged in rolling contact with a circumferential surface of each of the plurality of blanket cylinders, and a unit, arranged for each of the plurality of plate cylinders, for supplying an ink and dampening water to each of the plurality of plate cylinders.
  • a sheet fed from a paper feeder sequentially passes between an impression cylinder and each blanket cylinder and is then delivered to a delivery unit.
  • the printing images are transferred to the sheet which passes through the impression cylinder and the corresponding blanket cylinder.
  • the number of plate cylinders is, e.g., five, only a few plate cylinders are in rolling contact with each blanket cylinder. Therefore, printing quality is not substantially adversely affected by a water film. This thin water film can be absorbed by the sheet during feeding between the upstream and the downstream blanket cylinders.
  • Figs. 1 and 2 show a multicolor printing press according to an embodiment of the present invention, in which Fig. 1 shows a multicolor ground tint printing press for securities, and Fig. 2 shows a combination printing press using the press shown in Fig. 1.
  • a ground tint printing press 1 comprises a paper feeder 2, a printing unit 3, and a delivery unit 4.
  • the paper feeder 2 has a stack board (not shown) which supports sheets and can be automatically vertically moved.
  • the paper feeder 2 also has a sucker unit (not shown) for picking up the sheets stacked on the stack board one by one from the uppermost sheet and feeding each sheet to a feeder board 5.
  • Swing pre-grippers 7 are arranged in the printing unit 3 to grip the sheet fed from the feeder board 5 to a feedboard 6 and are pivoted while gripping the sheet.
  • a plurality of transfer cylinders 8, 9, 10, and 11 which have sheet grippers arranged in their grooves formed in the circumferential surfaces and are in rolling contact with each other are arranged at the downstream of the swing pre-grippers 7.
  • Reference numeral 12 denotes an impression cylinder in rolling contact with the transfer cylinder 11 at the downstream position thereof.
  • the impression cylinder 12 has a diameter three times that of the transfer cylinder 11.
  • the impression cylinder 12 is rotatably supported on right and left frames 13 and can be rotated in a direction indicated by an arrow in Fig. 1.
  • Blanket surfaces of first and second blanket cylinders 14 and 15 having blankets on their circumferential surfaces are rolling contact with the impression cylinder 12.
  • the first and second blanket cylinders 14 and 15 are juxtaposed in the circumferential direction of the impression cylinder 12.
  • Plate surfaces of plate cylinders 16 and 17 having plates thereon are in rolling contact with the blanket surface of the blanket cylinder 14 obliquely above and sideways the first blanket cylinder 14.
  • An inking unit 18 for supplying an ink to the corresponding plate surface and a dampening unit 19 for supplying dampening water to the corresponding plate surface are arranged for each of the plate cylinders 16 and 17.
  • Plate surfaces of plate cylinders 20, 21, and 22 having plates thereon are in rolling contact with the circumferential surface of the second blanket cylinder 15 sideways and below the second blanket cylinder 15.
  • An inking unit 23 for supplying an ink to a corresponding plate surface and a dampening unit 24 for supplying dampening water to the corresponding plate surface are arranged for each of the plate cylinders 20, 21, and 22.
  • Reference numeral 25 denotes a delivery cylinder arranged sideways the impression cylinder 12.
  • Sprockets 26 are mounted on both end shafts of the delivery cylinder 25.
  • a pair of right and left delivery chains 28 running in a direction indicated by an arrow in Fig. 1 are looped between the sprockets 26 and sprockets 27 in the delivery unit 4.
  • Plural pairs of grippers and gripper pads are axially juxtaposed on gripper rods bridged between the pair of right and left delivery chains 28 at predetermined intervals.
  • Reference numerals 29 and 30 denote first and second piles for stacking sheets which drop from the delivery chains 28 upon release of the sheets from the grippers.
  • a sheet picked up by a suction unit in the paper feeder 2 and fed onto the feeder board 5 is fed out to a feedboard 6 by a paper feed tape or the like.
  • the sheet is gripped by grippers of the impression cylinder 12 through the swing pre-grippers 7 and the transfer cylinders 8, 9, 10, and 11.
  • the sheet is fed in contact with the circumferential surface of the impression cylinder 12.
  • printing images are formed on the plate surfaces of the upper plate cylinders 16 and 17 by the corresponding inking units 18 and the corresponding dampening units 19.
  • These printing images are transferred to the blanket surface of the first blanket cylinder 14 and are then transferred to the sheet which passes between the first blanket cylinder 14 and the impression cylinder 12.
  • Printing images are also formed on the plate surfaces of the lower plate cylinders 20, 21, and 22 by the corresponding inking units 23 and the corresponding dampening units 24.
  • These printing images are transferred to the blanket surface of the second blanket cylinder 15 and are then transferred to the sheet which passes between the second blanket cylinder 15 and the impression cylinder 12.
  • the printed sheet is fed by the delivery chains 28 looped between the sprockets 26 coaxial with the delivery cylinder 25 and the sprockets 27 in the delivery unit 4.
  • the printed sheets are then alternately delivered to the piles 29 and 30.
  • a five-color halftone printing press has the five plate cylinders 16, 17, 20, 21, and 22.
  • two upper plate cylinders are arranged in rolling contact with the blanket cylinder 14, and three lower plate cylinders are arranged in rolling contact with the blanket cylinder 15.
  • a water film received at a contact point between the first blanket cylinder 14 and the impression cylinder 12 in transfer of a printing image from the blanket cylinder 14 to the sheet is absorbed by the sheet at a position passing through this contact position. Therefore, the water film does not impose any adverse affect at a contact point between the second blanket cylinder 15 and the impression cylinder 12.
  • Fig. 2 shows a combination printing press which employs the same ground tint printing portion shown in Fig. 1.
  • a plurality of transfer cylinders 31, 32, 33, 34, and 35 and an intaglio impression cylinder 36 are arranged between the impression cylinder 12 and the delivery unit.
  • intaglio printing can be performed after ground tint printing is performed by offset printing.
  • the arrangement and effect of the ground tint printing portion are the same as those of the embodiment shown in Fig. 1.
  • Figs. 3, 4, and 5 show combination printing presses according to other embodiments of the present invention.
  • the diameter of a second blanket cylinder 40 is three times that of each plate cylinder and is equal to that of an impression cylinder 12.
  • Other arrangements in Fig. 3 are substantially the same as those in Fig. 2.
  • each of the diameters of first and second blanket cylinders 50 and 51 is twice that of each plate cylinder.
  • Other arrangements in Fig. 4 are substantially the same as those in Fig. 2.
  • the diameter of a first blanket cylinder 60 is twice that of each plate cylinder
  • the diameter of a second blanket cylinder 61 is three times that of each plate cylinder.
  • Other arrangements in Fig. 5 are substantially the same as those in Fig.2.
  • Each embodiment described above exemplifies a sheet-fed printing press for feeding cut sheets with grippers.
  • the present invention is also applicable to a printing press using a roll of paper.
  • a multicolor printing press comprising an impression cylinder, a plurality of blanket cylinders juxtaposed in the circumferential direction of the impression cylinder and arranged in rolling contact with a circumferential surface of the impression cylinder, a plurality of plate cylinders juxtaposed in the circumferential direction of each of the plurality of blanket cylinders and arranged in rolling contact with a circumferential surface of each of the plurality of blanket cylinders, and a unit, arranged for each of the plurality of plate cylinders, for supplying an ink and dampening water to each of the plurality of plate cylinders.
  • the plurality of plate cylinders are divided into groups, and each group is in rolling contact with each of the plurality of blanket cylinders, a water film can be substantially eliminated even if planographic printing using dampening units is performed, thereby greatly improving quality of printing matters.
  • high-precision printing can be performed as compared with conventional commercial printing in which transfer operations are performed on different impression cylinders, thereby sufficiently coping with counterfeit printing using a commercial printing press.
  • four-color or more halftone ground tint printing in four or more colors can be performed by only planographic printing, inexpensive planographic plates can be used to print securities which cannot be easily counterfeited at low cost.
EP19900118562 1989-09-29 1990-09-27 Multicolor printing press Withdrawn EP0420234A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP252426/89 1989-09-29
JP1252426A JPH03114836A (ja) 1989-09-29 1989-09-29 多色刷印刷機

Publications (2)

Publication Number Publication Date
EP0420234A2 true EP0420234A2 (fr) 1991-04-03
EP0420234A3 EP0420234A3 (en) 1991-07-10

Family

ID=17237197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900118562 Withdrawn EP0420234A3 (en) 1989-09-29 1990-09-27 Multicolor printing press

Country Status (2)

Country Link
EP (1) EP0420234A3 (fr)
JP (1) JPH03114836A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997003831A1 (fr) * 1995-07-18 1997-02-06 Koenig & Bauer-Albert Ag Rotative offset a feuilles
CN103057250A (zh) * 2011-10-21 2013-04-24 小森公司 组合印刷机
CN103796833A (zh) * 2011-09-14 2014-05-14 小森公司 组合印刷机
CN105383153A (zh) * 2014-08-29 2016-03-09 小森公司 印刷机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0919371B1 (fr) * 1997-03-24 2006-07-19 Toray Industries, Inc. Dispositifs de couchage, d'impression et d'imagerie, systeme d'impression et procede d'impression

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944482A (en) * 1957-02-08 1960-07-12 Carl Allers Ets Rotary printing press for offset printing with three or more colours
JPS57174261A (en) * 1981-04-21 1982-10-26 Kazuo Tominaga Printing of sliding door paper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944482A (en) * 1957-02-08 1960-07-12 Carl Allers Ets Rotary printing press for offset printing with three or more colours
JPS57174261A (en) * 1981-04-21 1982-10-26 Kazuo Tominaga Printing of sliding door paper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 7, no. 20 (M-188)(1165) January 26, 1983 & JP-A-57 174 261 (KAZUO TOMINAGA ) October 26, 1982 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997003831A1 (fr) * 1995-07-18 1997-02-06 Koenig & Bauer-Albert Ag Rotative offset a feuilles
US5909708A (en) * 1995-07-18 1999-06-08 Koenig & Bauer-Albert Aktiengesellschaft Sheet-fed offset rotary printing machine
CN1076283C (zh) * 1995-07-18 2001-12-19 柯尼格及包尔-艾伯特公开股份有限公司 单张纸轮转胶印机
CN103796833A (zh) * 2011-09-14 2014-05-14 小森公司 组合印刷机
CN103057250A (zh) * 2011-10-21 2013-04-24 小森公司 组合印刷机
CN103057250B (zh) * 2011-10-21 2016-03-30 小森公司 组合印刷机
CN105383153A (zh) * 2014-08-29 2016-03-09 小森公司 印刷机
CN105383153B (zh) * 2014-08-29 2018-06-08 小森公司 印刷机

Also Published As

Publication number Publication date
EP0420234A3 (en) 1991-07-10
JPH03114836A (ja) 1991-05-16

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