EP0481801A1 - Unité d'impression flexographique - Google Patents

Unité d'impression flexographique Download PDF

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Publication number
EP0481801A1
EP0481801A1 EP91309617A EP91309617A EP0481801A1 EP 0481801 A1 EP0481801 A1 EP 0481801A1 EP 91309617 A EP91309617 A EP 91309617A EP 91309617 A EP91309617 A EP 91309617A EP 0481801 A1 EP0481801 A1 EP 0481801A1
Authority
EP
European Patent Office
Prior art keywords
print unit
housing
line
unit according
flexographic print
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Withdrawn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
EP91309617A
Other languages
German (de)
English (en)
Inventor
Marcus Gerard Park
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.)
Simon Container Machinery Ltd
Original Assignee
Simon Container Machinery 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 Simon Container Machinery Ltd filed Critical Simon Container Machinery Ltd
Publication of EP0481801A1 publication Critical patent/EP0481801A1/fr
Withdrawn legal-status Critical Current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
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/42—Guards or covers, e.g. for preventing ingress or egress of foreign matter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/0024—Frames

Definitions

  • THIS INVENTION concerns flexographic print units which may be operated individually or in combination with other print units in plant known as flexo-folder-gluers or rotary die cutting lines, where the or each print unit is adapted to apply a printed image to a moving flat sheet or a succession of sheets passing through the unit.
  • a rotary printing cylinder carries an engraved or moulded printing plate, and ink is picked up from a reservoir by a transfer roller and transferred to the printing cylinder so that in turn the image is transferred to the flat sheet as it passes tangentially across the surface of the printing cylinder during rotation thereof.
  • a flexographic print unit for applying a printed image to a moving flat sheet, comprising a housing having inlet and outlet apertures for the passage there through of said sheet, and containing a print cylinder, an impression cylinder, an ink transfer roller and an ink reservoir; characterised by means to cause a stream of air to flow outwardly from said housing thus to ensure that the ingress of dust and fibre into the print unit is at least substantially avoided.
  • a machine line comprises a sheet feeder unit 10 adapted to feed paperboard sheets successively and in register to a number, in this case 4, of individual flexographic print units 11. These are followed by a rotary die cutting unit 12 and a unit 13 for stripping waste material from the cut sheets.
  • a rotary die cutting unit 12 and a unit 13 for stripping waste material from the cut sheets.
  • the successive sheets may pass on to a further unit for folding and gluing the sheets to produce formed but collapsed boxes.
  • the multiple images, perhaps in various colours, which are printed onto the sheets during their passage through the line of print units may contain close definition, and to ensure that this is maintained it is essential that no dust or fibre is permitted to enter the print units either to contaminate the ink or to become embedded in the engraved or moulded image on the surface of the print cylinder.
  • each print unit is mounted on rails so that the entire line of machinery may be separated into individual parts for maintenance, and is contained within a housing consisting essentially of side walls which latch together when the plant is assembled.
  • each print unit is entirely enclosed within an individual housing, save for opposed inlet and outlet slots for the passage through the unit of the sheets to be printed. Such slots are illustrated at 14 in Fig. 2.
  • each print unit 11 includes a driven rotary printing cylinder 15, an impression cylinder 16 forming a nip with the printing roller 15, through which the sheets may pass, an ink transfer roller 17, an ink reservoir 18, a rubber covered wipe roller 19 and a doctor blade assembly 20.
  • Pull rolls 21 and 22 provide a further nip for driving the sheets through the machine.
  • the entire unit is contained within a housing 23.
  • the interior of the housing is supplied via an inlet 25 with a continuous stream of filtered and pressurised air which is permitted to vent from the housing in a controlled manner via an adjustable outlet 24 thus to ensure that the pressure within the housing 23 is maintained at a level above atmospheric pressure. This condition ensures that no dust or fibre may enter the print unit to contaminate the ink or to foul the various roll surfaces.
  • the pressurised air is supplied, preferably at low pressure in the order of perhaps less than 5mm water gauge to each operating unit within the machine.
  • the volume and velocity of air supplied should not be so great as to cause premature drying of the ink but may indeed enhance controlled drying.
  • the air may be supplied to a line of machines such as those described in relation to Fig. 1, either individually, at the same or at different levels of pressure and/or volume, or alternatively from a common supply manifold valve-connected to each unit.
  • the invention may be carried out by providing means on each unit in the regions of the slots 14, to direct a stream of filtered air outwardly through the slots, there being sufficient room left between units in the line to permit escape of said air streams.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP91309617A 1990-10-17 1991-10-17 Unité d'impression flexographique Withdrawn EP0481801A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909022478A GB9022478D0 (en) 1990-10-17 1990-10-17 A flexographic print unit
GB9022478 1990-10-17

Publications (1)

Publication Number Publication Date
EP0481801A1 true EP0481801A1 (fr) 1992-04-22

Family

ID=10683826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91309617A Withdrawn EP0481801A1 (fr) 1990-10-17 1991-10-17 Unité d'impression flexographique

Country Status (2)

Country Link
EP (1) EP0481801A1 (fr)
GB (1) GB9022478D0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0739730A3 (fr) * 1995-04-27 1998-03-11 Mitsubishi Jukogyo Kabushiki Kaisha Machine à imprimer flexographique
EP0864520A1 (fr) * 1997-03-07 1998-09-16 Ward Holding Company, Inc. Dispositif pour le traitement des flancs
US5842417A (en) * 1995-04-25 1998-12-01 Heidelberger Druckmaschinen Ag Apparatus for preventing condensation in machines processing a web of material
WO2002085627A1 (fr) * 2001-04-20 2002-10-31 Cimco, S.L. Imprimante flexographique perfectionnee

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB545336A (en) * 1940-05-31 1942-05-20 Goss Printing Press Co Ltd Improvements in or relating to rotary printing presses
US3436265A (en) * 1963-08-19 1969-04-01 Thomas A Gardner Pressure gradient web cleaning method
DE2949659A1 (de) * 1979-12-11 1981-06-19 Agfa-Gevaert Ag, 5090 Leverkusen Fotografisches kopiergeraet
EP0084740A1 (fr) * 1982-01-26 1983-08-03 HERVE ET FILS SA (Société anonyme) Perfectionnements aux rotatives d'impression d'un support mince défilant de façon continue
NL8302812A (nl) * 1983-08-10 1985-03-01 Anderson & Vreeland Bv Flexo-drukmachine.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB545336A (en) * 1940-05-31 1942-05-20 Goss Printing Press Co Ltd Improvements in or relating to rotary printing presses
US3436265A (en) * 1963-08-19 1969-04-01 Thomas A Gardner Pressure gradient web cleaning method
DE2949659A1 (de) * 1979-12-11 1981-06-19 Agfa-Gevaert Ag, 5090 Leverkusen Fotografisches kopiergeraet
EP0084740A1 (fr) * 1982-01-26 1983-08-03 HERVE ET FILS SA (Société anonyme) Perfectionnements aux rotatives d'impression d'un support mince défilant de façon continue
NL8302812A (nl) * 1983-08-10 1985-03-01 Anderson & Vreeland Bv Flexo-drukmachine.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842417A (en) * 1995-04-25 1998-12-01 Heidelberger Druckmaschinen Ag Apparatus for preventing condensation in machines processing a web of material
EP0739730A3 (fr) * 1995-04-27 1998-03-11 Mitsubishi Jukogyo Kabushiki Kaisha Machine à imprimer flexographique
EP0864520A1 (fr) * 1997-03-07 1998-09-16 Ward Holding Company, Inc. Dispositif pour le traitement des flancs
WO2002085627A1 (fr) * 2001-04-20 2002-10-31 Cimco, S.L. Imprimante flexographique perfectionnee

Also Published As

Publication number Publication date
GB9022478D0 (en) 1990-11-28

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