EP1084831A2 - Dispositif pour la collection des matières résiduelles dispersées pendant la production de plaques flexographiques - Google Patents

Dispositif pour la collection des matières résiduelles dispersées pendant la production de plaques flexographiques Download PDF

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Publication number
EP1084831A2
EP1084831A2 EP00307903A EP00307903A EP1084831A2 EP 1084831 A2 EP1084831 A2 EP 1084831A2 EP 00307903 A EP00307903 A EP 00307903A EP 00307903 A EP00307903 A EP 00307903A EP 1084831 A2 EP1084831 A2 EP 1084831A2
Authority
EP
European Patent Office
Prior art keywords
nozzle body
flexographic printing
nozzle tip
nozzle
imaging
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Withdrawn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
EP00307903A
Other languages
German (de)
English (en)
Other versions
EP1084831A3 (fr
Inventor
David Eshed
Yosef Kamir
Nissim Pilossof
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.)
Kodak IL Ltd
Original Assignee
Kodak IL Ltd
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 Kodak IL Ltd filed Critical Kodak IL Ltd
Publication of EP1084831A2 publication Critical patent/EP1084831A2/fr
Publication of EP1084831A3 publication Critical patent/EP1084831A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B21/00—Common details of photographic composing machines of the kinds covered in groups B41B17/00 and B41B19/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation

Definitions

  • the present invention relates to an apparatus for collecting residual materials dispersed during the imaging process of flexographic printing plates.
  • Fig. 1 schematically illustrates a conventional flexographic Computer to Plate (CTP) imaging system referenced 10.
  • CTP Computer to Plate
  • Such an imaging system is, for example, LOTEM FLEX 40/45 plate setter manufactured by the assignee.
  • a flexographic plate 12 is attached by strips of adhesive tape 16 to the external surface of drum 14.
  • Such flexographic plates are, for example, type DPS or DPH manufactured by Dupont Cyrel from Wilmington, DE, U.S.A.
  • the flexographic plate 12 may consist of three main layers:
  • the imaging of the flexographic plate begins with exposure of the black layer to laser beam, so as to expose the monomeric layer according to the required image, under control of computer 11.
  • a consequent radiation of tile plate by UV will polymerize the plastic monomer at the exposed areas, leaving the unexposed area as monomer. Further processing of the plate will accommodate the flexographic plate to printing.
  • the drum 14 is rotated in the direction indicated by arrow 22.
  • the imaging system 10 further includes a laser system 15, comprising an optical system 18 for transmitting a focused laser beam 20 to the plate 12.
  • a laser system may have a wavelength of 830 nanometer and power of 900 mw.
  • the optical system 18 is moved on a carriage (not shown) along the drum's longitudinal axis in a direction indicated by arrow 42 of Fig.2. Such travelling speed may be 48-96 mm/min.
  • the focused laser radiation on the imaging black layer causes local high temperature and thus local ablation of the black layer.
  • the ablation process may cause some unwanted particulate matter 24 like carbon based particles to be deposited on the flexographic plate or on the optics window 26. Said deposits have detrimental effects on the flexographic plates, as the later exposure to UV will be disturbed. Further, carbon based deposits on the optics aperture will block the laser radiation.
  • FIG. 2 schematically showing the imaging apparatus as in Fig. 1, with the additional exhausting system.
  • the apparatus includes a nozzle tip 30 of special configuration, attached to nozzle body 32.
  • the nozzle tip 30 and the nozzle body 32 are mounted on the laser optics 18, so that the nozzle tip 30 is in close vicinity with the laser beam ablation point 21.
  • a flexible pipe 34 shown schematically as a dashed line, is attached in one of its ends to the nozzle body 32 and in its opposite end to an industrial fume exhauster 44, such as Zero Smog WFE35 manufactured by Weller.
  • the fume exhauster comprises sub-micron filters 36 and an exhaust blower 40.
  • Flexible pipe 34 may be constructed of flexible material such as rubber or plastic.
  • the drum 14 rotates at a typical speed of 100-300 rpm, and the optics head travels along the longitudinal axis of the drum at a speed of 100-40 mm/min respectively, in a direction indicated by arrow 42 in Fig.3.
  • Figs. 4, 5a and 5b are an isometric view of the nozzle tip 30, a plan view of nozzle body 32 and an isometric view of nozzle body 32, respectively.
  • Nozzle tip 30 has screw holes 56, through which it is attached to the nozzle body 32 with matching holes 58.
  • Nozzle tip 30 additionally comprises a front opening 50 and a side opening 54. When nozzle tip 30 is mounted onto nozzle body 32, the side opening 54 coincides with opening 52 of nozzle body 32.
  • Nozzle body 32 additionally comprises adapter 60, adapted to receive flexible pipe 34 of Fig. 2.
  • Nozzle body 32 and nozzle tip 30 may be constructed of any industrial material that can be mechanically processed, e.g. aluminum.
  • the angle by which nozzle tip 30 is inclined with respect to imaging drum 14 is determined by selectively adjusting the screws that hold nozzle tip 30 to nozzle body 32. This angle should be adjusted in conjunction with the drum 14 rotation speed, the optical system 18 carriage movement speed and the fume exhauster 44 speed, to assure a thorough collection of the residual particles produced by the imaging process.
  • drum 14 rotates in the direction indicated by arrow 22, while imaging system 15, 18 moves along the longitudinal axis of drum 14, in the direction indicated by arrow 42, applying IR radiation to ablate the black topmost layer of plate 12 according to the required pattern.
  • Fume exhauster 44 causes ablation residual particles to be sucked into nozzle tip 30, through opening 50. The residual particles then move through opening 54 in nozzle tip 30, which coincides with opening 52 in nozzle body 32, into nozzle body 32. The residual particles are then sucked through nozzle body 32 into flexible pipe 34. The particles enter fume exhauster 44, where they are trapped by filters 36. The filtered air is blown out by exhaust blower 40.
  • CTP system described hereinabove in conjunction with the present invention may be a system dedicated to flexographic plate imaging, or a plateless flexographic printing system, on which the printing process takes place after the plate has been imaged.

Landscapes

  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
EP00307903A 1999-09-14 2000-09-13 Dispositif pour la collection des matières résiduelles dispersées pendant la production de plaques flexographiques Withdrawn EP1084831A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15367099P 1999-09-14 1999-09-14
US153670P 1999-09-14

Publications (2)

Publication Number Publication Date
EP1084831A2 true EP1084831A2 (fr) 2001-03-21
EP1084831A3 EP1084831A3 (fr) 2002-04-10

Family

ID=22548215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00307903A Withdrawn EP1084831A3 (fr) 1999-09-14 2000-09-13 Dispositif pour la collection des matières résiduelles dispersées pendant la production de plaques flexographiques

Country Status (2)

Country Link
EP (1) EP1084831A3 (fr)
CA (1) CA2319945A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105082724A (zh) * 2015-07-30 2015-11-25 宁波市鄞州唯达汽车配件厂（普通合伙） 一种改进型版尾夹

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5574493A (en) * 1994-03-11 1996-11-12 Eastman Kodak Company Vacuum collection system for dye-ablation printing process
US5575211A (en) * 1994-10-28 1996-11-19 Hycorr Machine Corporation Washing Arrangement for rotary printer
US5654125A (en) * 1995-05-01 1997-08-05 E. I. Du Pont De Nemours And Company Laser apparatus and process of use
JPH08318390A (ja) * 1995-05-26 1996-12-03 Hitachi Ltd アブレーションデブリス除去装置
US5934197A (en) * 1997-06-03 1999-08-10 Gerber Systems Corporation Lithographic printing plate and method for manufacturing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105082724A (zh) * 2015-07-30 2015-11-25 宁波市鄞州唯达汽车配件厂（普通合伙） 一种改进型版尾夹

Also Published As

Publication number Publication date
CA2319945A1 (fr) 2001-03-14
EP1084831A3 (fr) 2002-04-10

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