EP0364918A2 - Druckzylinder mit Waschvorrichtung, insbesondere für Rotationsdruckmaschinen - Google Patents

Druckzylinder mit Waschvorrichtung, insbesondere für Rotationsdruckmaschinen Download PDF

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Publication number
EP0364918A2
EP0364918A2 EP89119161A EP89119161A EP0364918A2 EP 0364918 A2 EP0364918 A2 EP 0364918A2 EP 89119161 A EP89119161 A EP 89119161A EP 89119161 A EP89119161 A EP 89119161A EP 0364918 A2 EP0364918 A2 EP 0364918A2
Authority
EP
European Patent Office
Prior art keywords
color
cylindrical body
printing cylinder
blade
washing water
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
EP89119161A
Other languages
English (en)
French (fr)
Other versions
EP0364918A3 (de
EP0364918B1 (de
Inventor
Bernardo Mascioni
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.)
Stork Brabant BV
Original Assignee
MASCIONI SpA
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 MASCIONI SpA filed Critical MASCIONI SpA
Publication of EP0364918A2 publication Critical patent/EP0364918A2/de
Publication of EP0364918A3 publication Critical patent/EP0364918A3/de
Application granted granted Critical
Publication of EP0364918B1 publication Critical patent/EP0364918B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/008—Cleaning arrangements or devices for doctor blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/003—Cleaning arrangements or devices for screen printers or parts thereof
    • B41F35/004—Cleaning arrangements or devices for screen printers or parts thereof for cylindrical screens

Definitions

  • the present invention relates to a printing cylinder with washing means particularly for rotary printing machines.
  • the aim of the invention is indeed to eliminate the above described disadvantages by providing a printing cylinder which can be washed rapidly and easily without having to remove it from the printing machine and without introducing particular constructive complications.
  • a particular object of the invention is to provide a printing cylinder which is structured so as to achieve an accurate washing of all the regions thereof which are normally affected by color and without having to incline the cylinder to remove the washing water.
  • Another object of the present invention is to provide a printing cylinder which by virtue of its peculiar constructive characteristics is capable of giving the greatest assurances of reliability and safety in use.
  • Not least object of the present invention is to provide a printing cylinder which can be easily obtained starting from commonly commercially available elements and materials and is furthermore competitive from a merely economical point of view.
  • a printing cylinder with washing means particularly for rotary printing machines, according to the invention, characterized in that it comprises a cylindrical body inside which there extends a color feed bar provided with a coupling inlet arranged outside said cylindrical body, said bar being adapted to feed the color at a blade which acts on the inner surface of said cylindrical body, a washing water feed chamber being defined around said bar, said chamber being connected to an inlet coupling which is arranged outside said cylindrical body, said chamber having a first plurality of nozzles for sending the washing water toward said blade and a second plurality of nozzles for feeding the washing water toward the heads of said cylindrical body.
  • the printing cylinder with washing means particularly for rotary printing machines, according to the invention, comprises a cylindrical body 1 provided with the conventional surface for the passage of the color onto the fabric or the like to be printed.
  • a color feed bar 2 which is provided, at least at one of its axial ends, with a coupling inlet 3 which is external to said cylindrical body 1.
  • a doctor blade or knife 10 is connected to the color bar, inside the cylindrical body 1, and its free end acts at the inner surface of said cylindrical body so as to distribute the color to be printed.
  • the color besides being able to spread uniformly, significantly reduces the dirtying of the blade especially at the regions of coupling to the color bar, which are difficult to wash.
  • a washing water feed chamber 20 is defined around the color feed bar and preferably has, in transverse cross section, the shape of an annular sector which affects the periphery of the color bar except for the region where the blade 10 is provided.
  • Said washing water feed chamber 20 is provided with an inlet coupling 21 arranged outside said cylindrical body which is advantageously coaxial to the coupling inlet 3.
  • the washing water inlet chamber 20 is provided with a first plurality of washing nozzles 30 which are arranged along the longitudinal extension of the chamber 20 and are orientated so as to feed the washing jets against both faces of the blade, consequently washing the blade accurately.
  • a second plurality of washing nozzles 35 is furthermore arranged at axial ends of the chamber 20; said nozzles are directed so as to propel the washing water jet toward the heads or axial ends 40 of the washing cylinder, thus eliminating the amount of color which unavoidably deposits in the printing cylinder in the region arranged outside the blade's longitudinal ends.
  • the heads 40 are furthermore provided with a plurality of discharge holes 41 which have their peripheral edge at the inner surface of the cylinder, so that there is no stagnation of washing water inside the cylinder even if said cylinder is not inclined.
  • a covering lid not illustrated in the drawings, is obviously furthermore provided; said lid closes the holes 41 during the normal printing steps, during which the color is inside the cylindrical body 1.
  • the printing cylinder according to the invention allows to print the color in the conventional manner by feeding the color by means of the color feed bar 2 which, by virtue of the coupling inlet 3, is connected to a color feed pump.
  • washing water is fed both by means of the inlet coupling 21 and by means of the inlet 3, so that the washing water is sent into the chamber or color feed bar, washing it accurately; the washing water jets are simultaneously sent to the blade and wash it completely, being facilitated in doing so by the fact that the color is fed onto the blade already proximate to the inner surface of the printing cylinder, with a consequently lesser dirtying of the blade.
  • the lids closing the holes 41 are also removed during washing so that the washing water can flow directly toward the outside.
  • the invention achieves the proposed aims, and in particular the fact is stressed that the particular arrangement of the nozzles allows to completely wash all the cylinder's internal regions.
  • Another important aspect is furthermore constituted by the fact that since the blade's color discharge ports are proximate to the inner surface of the cylindrical printing body, the dirtying of its outer surface is reduced significantly.
  • the coaxial arrangement of the coupling inlets for color feed and of the inlet coupling for the washing water furthermore allows to simplify all the connections.
  • the materials employed may be any according to the requirements.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Screen Printers (AREA)
EP89119161A 1988-10-20 1989-10-16 Druckzylinder mit Waschvorrichtung, insbesondere für Rotationsdruckmaschinen Expired - Lifetime EP0364918B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8822376A IT1230574B (it) 1988-10-20 1988-10-20 Cilindro di stampa con mezzi di lavaggio particolarmente per macchine rotative da stampa
IT2237688 1988-10-20

Publications (3)

Publication Number Publication Date
EP0364918A2 true EP0364918A2 (de) 1990-04-25
EP0364918A3 EP0364918A3 (de) 1991-05-02
EP0364918B1 EP0364918B1 (de) 1994-08-31

Family

ID=11195435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119161A Expired - Lifetime EP0364918B1 (de) 1988-10-20 1989-10-16 Druckzylinder mit Waschvorrichtung, insbesondere für Rotationsdruckmaschinen

Country Status (4)

Country Link
EP (1) EP0364918B1 (de)
AT (1) ATE110634T1 (de)
DE (1) DE68917844D1 (de)
IT (1) IT1230574B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0865920A3 (de) * 1997-03-18 1999-03-10 Ichinose International Incorporated Textilrotationssiebdruckmaschine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1247795B (it) * 1991-01-08 1995-01-02 Reggiani Macchine Spa Apparecchiatura per il lavaggio automatico delle unita' di stampa, mantenute in posizione di lavoro, utilizzate sulle macchine da stampa a cilindri rotanti
NL1011727C1 (nl) 1998-10-16 2000-04-18 Stork Brabant Bv Zeefdrukinrichting met drukpositie-afscherming.
NL1010337C2 (nl) * 1998-10-16 2000-04-18 Stork Brabant Bv Zeefdrukinrichting met drukpositieafscherming.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3101766C1 (de) * 1981-01-21 1982-09-09 Saueressig Gmbh, 4422 Ahaus Rotationssiebdruckvorrichtung
IT1218124B (it) * 1987-02-03 1990-04-12 Reggiani Macchine Spa Procedimento e relativa apparecchiatura per il lavaggio automatico,direttamente in macchina,di tutti i componenti le unita' di stampa per macchine da stampa a cilindri rotanti

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0865920A3 (de) * 1997-03-18 1999-03-10 Ichinose International Incorporated Textilrotationssiebdruckmaschine

Also Published As

Publication number Publication date
IT1230574B (it) 1991-10-28
ATE110634T1 (de) 1994-09-15
DE68917844D1 (de) 1994-10-06
EP0364918A3 (de) 1991-05-02
EP0364918B1 (de) 1994-08-31
IT8822376A0 (it) 1988-10-20

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