EP0855959A1 - Couteau encreur pour rouleau d'encrier d'une imprimante - Google Patents

Couteau encreur pour rouleau d'encrier d'une imprimante

Info

Publication number
EP0855959A1
EP0855959A1 EP96932426A EP96932426A EP0855959A1 EP 0855959 A1 EP0855959 A1 EP 0855959A1 EP 96932426 A EP96932426 A EP 96932426A EP 96932426 A EP96932426 A EP 96932426A EP 0855959 A1 EP0855959 A1 EP 0855959A1
Authority
EP
European Patent Office
Prior art keywords
metal plate
transverse grooves
width
ink
transverse
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
EP96932426A
Other languages
German (de)
English (en)
Other versions
EP0855959B1 (fr
Inventor
Hanspeter Bruni
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.)
Sycolor Consulting AG
Original Assignee
Sycolor Consulting AG
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 Sycolor Consulting AG filed Critical Sycolor Consulting AG
Publication of EP0855959A1 publication Critical patent/EP0855959A1/fr
Application granted granted Critical
Publication of EP0855959B1 publication Critical patent/EP0855959B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices

Definitions

  • the invention relates to a method for producing an ink knife for an ink fountain roller of a printing press from an at least approximately 2 mm thick metal plate, parallel slots being formed which extend at right angles from the working edge of the ink knife over part of the plate width and lamellae of Form color zone width.
  • Lamellar color meters are known for example from CH-A5602345.
  • This color knife has recesses in the area of the working edge, which are located on both sides of the adjusting screws.
  • the lamellae can be adjusted individually, mechanical influence on the neighboring knife areas is excluded or at least considerably reduced.
  • the thickness of the ink layer can be set on each lamella, individual color information in the different ink zones can be changed as required by the printed image in the various ink zone widths.
  • a disadvantage of this solution is the interspaces between the lamellae, which also allow highly viscous ink to pass through and cause ring beads to form on the ink duct.
  • the slots between the slats of an ink knife are filled with a plastic.
  • the risk increases that parts of the Plastic, especially when a slat is strongly deflected relative to the neighboring one, and adversely affect the printing quality.
  • color knives are produced which have slots formed by laser beams with a width of 0.1 to 0.3 mm, which prevents leakage without additional cover in the case of highly viscous printing inks.
  • the colorimeter In addition to the defined slot width, the colorimeter must have the following properties:
  • the slots must be longer than half the plate width, but must not exceed two thirds of it.
  • the thickness of the plate must be at least twice the maximum adjustment range of the slats.
  • the present invention has for its object to provide a method of the type mentioned which considerably facilitates and rationalizes the production of narrow slots, in particular with laser beams.
  • a metal plate thickness of at least 2 mm an extremely narrow, regular cut should be produced with laser beams, and the slats formed, despite their thickness, should be adjustable with an appropriate amount of force.
  • additional means to prevent or at least reduce the disadvantageous consequences of color penetrating into the slot and belonging to a less high viscosity range.
  • the object is achieved in that
  • the thickness of the metal to be cut preferably by the laser beam is always less than the thickness of the metal plate. This remaining thickness is limited by the deflection of the lamella len when working against an ink fountain roller. Since this adjustment path is relatively small in practice, the transverse grooves can be made correspondingly deep and the slit formation can thereby be facilitated by the preferred laser method.
  • the mobility of the lamellae is always ensured to the desired extent by expediently providing a weakening groove of selectable depth on at least one side of the metal plate at the blind slot end.
  • the transverse grooves are preferably cut out in a width of 50 to 200% of the plate thickness to a depth of 20 to 80% of this plate thickness.
  • a metal plate made of spring steel, which is 2 to 5 mm, in particular approximately 3 mm, thick is expediently used for the production of a color knife.
  • the depth of the transverse grooves is preferably in the range from 1 mm to d - 1 mm, where d is the thickness of the metal plate.
  • transverse grooves are essentially unimportant; in addition to a rectangular, square, trapezoidal, semicircular or segment of a circle, it can take on any other shape which is suitable in terms of production technology.
  • transverse grooves are rectangular cut from the metal plate, before or after the plate has hardened.
  • the weakening groove is expediently milled out of the metal plate on the same side in a subsequent work step.
  • the longitudinal weakening grooves can also be left out on both sides of the plate.
  • a semicircular or circular segment-shaped cross-sectional shape is particularly well suited for a weakening groove.
  • the weakening groove can also be rectangular, square or even a simple, broad cut, in accordance with the cross-sectional shape of the transverse grooves.
  • the weakening groove (s) is / are cut out more or less deeply.
  • the slots which are generally produced between the lamellae with laser beams expediently have a width of at most about 0.1 mm, preferably at most about 0.05 mm, in particular 0.01 to 0.02 mm.
  • an equivalent method can be used instead of the laser beams, for example wire EDM.
  • the transverse grooves are filled with an elastic mass which does not penetrate into the grooves. This creates a perfect seal for the slots.
  • This mass which is by no means metallic, preferably consists of a plastic, an acid-resistant silicone mass or an inserted rubber profile, for example a rubber cord.
  • the weakening groove could also be filled with the elastic mass if required.
  • the transverse grooves in the metal plate are covered, at least in the area of the working edge, with a first leg of a scraper wiper. Its second, freely cantilevered leg is bent or bent at an angle of preferably 30 to 60 °.
  • the wiping angle consists, for example, of a 0.05 to 0.1 mm thick metal sheet or a plastic profile.
  • the first leg of the wiping angle is preferably glued to the slats of the metal plate. Thanks to the transverse grooves, the individual slats have the necessary freedom of movement for positioning without mechanical impact on the adjacent slats.
  • FIG. 1 shows a view of FIG. 1
  • FIG. 3 shows a side view of FIG. 1,
  • FIG. 4 shows an enlarged partial longitudinal section through the color knife in the area of the lamellae
  • FIG. 5 shows a partial side view of a color knife with a wiping angle.
  • a color knife 10 shown in FIGS. 1 to 3 essentially consists of a metal plate 12 made of spring steel, which has a width of 90 mm and a thickness d of 3.5 mm. Starting from a working edge 14, parallel transverse grooves 16 are recessed at a right angle, which have a depth t of 1.5 mm and a width c of 2.5 mm. The grooves extend with respect to the width b of the metal plate 12 over a distance of approximately 35 mm.
  • Laser beam produced slot 18 of 35 mm in length and 0.015 mm in width and 2 mm in depth, which serves to form lamellae.
  • a weakening groove 22 runs parallel to the working edge 14 and has a radius of curvature of approximately 5 mm and is similar to the transverse grooves 161.5 mm deep. Thanks to this weakening groove 22, the slats 24, which form a color zone width f, can be moved perpendicular to the metal plate plane 12 with less effort.
  • the slits 18 formed by laser beams and having a width s of 0.015 mm between the lamellae 24 can be seen better in FIG.
  • the transverse grooves 16, which are again rectangular in cross section, are filled with an elastic mass 26, in the present case with an acid-resistant silicone mass.
  • a stripping angle 38 (FIG. 5) is attached to the slats with an adhesive layer 28. From this wiping angle only the first leg 30 can be seen.
  • the adjacent middle lamella 24 is not affected because the wide transverse groove 16 has a compensating effect. If the transverse groove 16 were only narrow, the adjacent lamella 24 would be pulled along. The narrow slot s, on the other hand, is retained even when the right lamella 24 is moved. The remaining material thickness dt in the area of the working edge 14 is large enough to keep the slot 18 narrow as it is when a slat 24 is moved in the direction of the sheet plane. In other words, the adjustment of the slats to change the amount of paint supplied is never so great that adjacent slats 24 separate apart and no longer form a slot 18.
  • FIG. 5 shows an ink knife 10 placed on an ink fountain roller 34.
  • the lamellae of the color knife 10 which is more than 2 mm thick, are recessed by two weakening grooves 22, which run longitudinally parallel to the working edge 14 and have a cross-sectionally circular segment shape. As a result, the lamella 24 becomes more movable in the direction of the arrow 36.
  • a scraping angle 38 is glued onto the slats 24 over its first leg 30.
  • the e.g. Legs 40 of the wiping angle 38 which are freely cantilevered over 3 to 5 cm are bent by an angle ⁇ of somewhat over 40 °.
  • a metal plate 12 for producing an ink knife 10 has a thickness d of over 2 mm, preferably over 3 mm. This prevents the slats 24 from deforming when they are turned on. The screws do not need any base plates.
  • the relatively thick slats can be moved to the desired extent in the region of the working edge 14.
  • the transverse grooves allow a very narrow slit which can be produced in a simple manner with laser beams and which can be matched to the viscosity of the color.
  • the wide transverse grooves allow the arrangement of a wiping angle 38 without mechanical effects on the adjacent lamellae, which is glued on the side of the metal plate 12 facing away from the ink fountain roller 34.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Laser Beam Processing (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un couteau encreur (10) pour un rouleau d'encrier d'une imprimante, constitué d'une plaque métallique d'au moins 2 mm d'épaisseur environ. Des fentes parallèles (18) s'étendant, à partir du bord de travail du couteau encreur (10), sont formées sur une partie de la largeur de la plaque et définissent des lamelles (24) ayant la largeur des zones de couleur. Des rainures (16) borgnes transversales, parallèles entre elles, sont tout d'abord réalisées dans la plaque métallique, à partir du bord de travail, à des intervalles correspondant à la largeur des zones de couleur. Après quoi, une rainure d'affaiblissement continue s'étendant parallèlement au bord de travail, est réalisée dans la zone des extrémités borgnes des rainures transversales (16), de préférence au moins sur une face de la plaque métallique. Enfin, la plaque métallique est complètement découpée dans la zone des rainures transversales (16), de préférence par faisceau laser, avec formation d'une fente étroite (18) à des intervalles correspondant à la largeur des zones de couleur.
EP96932426A 1995-10-19 1996-10-17 Couteau encreur pour rouleau d'encrier d'une imprimante Expired - Lifetime EP0855959B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH296495 1995-10-19
CH2964/95 1995-10-19
CH296495 1995-10-19
PCT/CH1996/000365 WO1997014562A1 (fr) 1995-10-19 1996-10-17 Couteau encreur pour rouleau d'encrier d'une imprimante

Publications (2)

Publication Number Publication Date
EP0855959A1 true EP0855959A1 (fr) 1998-08-05
EP0855959B1 EP0855959B1 (fr) 2000-01-19

Family

ID=4245603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96932426A Expired - Lifetime EP0855959B1 (fr) 1995-10-19 1996-10-17 Couteau encreur pour rouleau d'encrier d'une imprimante

Country Status (13)

Country Link
US (1) US5974966A (fr)
EP (1) EP0855959B1 (fr)
JP (1) JPH11514309A (fr)
AT (1) ATE188915T1 (fr)
AU (1) AU701694B2 (fr)
BR (1) BR9611110A (fr)
CA (1) CA2235255C (fr)
CZ (1) CZ293716B6 (fr)
DE (1) DE59604252D1 (fr)
ES (1) ES2144770T3 (fr)
NZ (1) NZ319097A (fr)
SK (1) SK282807B6 (fr)
WO (1) WO1997014562A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116141831A (zh) * 2023-03-10 2023-05-23 上海华太智科信息技术有限公司 一种琴键式隔色分区遥控印刷机墨斗

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3100374B1 (ja) * 1999-06-03 2000-10-16 三菱重工業株式会社 インキ供給装置及びインキキー
US20030226579A1 (en) * 2002-06-06 2003-12-11 Carrier Gordon Eugene Serrated doctor blades
US6796231B2 (en) * 2002-09-20 2004-09-28 The Provident Group Shield for doctor blade holder
US6802255B2 (en) 2002-12-09 2004-10-12 Color Control Corp. Ink fountain mechanism
US7178461B2 (en) * 2002-12-09 2007-02-20 Color Control Corp. Ink fountain assembly with non-tilt cheeks and liner replacement mechanism
FI115654B (fi) * 2003-02-27 2005-06-15 Metso Paper Inc Laitteisto ja menetelmä terän vaihtamiseksi päällystyslaitteella ja päällystyslaitteen terä
US7311804B2 (en) * 2004-03-31 2007-12-25 Metso Paper, Inc. Universal doctor blade with indicia
DE602006002039D1 (de) * 2006-12-04 2008-09-11 C B G Acciai S R L Vorgehonte Rakel mit bogenförmigem Lamellenprofil und Herstellungsverfahren für die Rakel
DE102018219129B3 (de) * 2018-11-09 2019-11-07 Trumpf Laser Gmbh Verfahren und Computerprogrammprodukt zur OCT-Messstrahljustierung

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2837024A (en) * 1955-04-07 1958-06-03 John Waldron Corp Ink fountain blade
DE2545737A1 (de) * 1975-10-11 1977-04-14 Frankenthal Ag Albert Farbmesser fuer die farbkastenwalze
DD153476A3 (de) * 1980-04-10 1982-01-13 Hans Johne Verschmutzungsschutz an farbkaesten von druckmaschinen
DE3024557C2 (de) * 1980-06-28 1982-12-09 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbkasten zur Aufnahme von Offset-Druckfarbe
JPS59230748A (ja) * 1983-06-13 1984-12-25 凸版印刷株式会社 化粧シ−ト
DE3525589C1 (de) * 1985-07-18 1986-04-30 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbmesser fuer eine Farbkastenwalze einer Druckmaschine
DE3707570A1 (de) * 1987-03-10 1988-09-22 Jansen Herfeld Roettger Fa Farbmesser fuer die druckindustrie
US4773327A (en) * 1987-04-09 1988-09-27 Am International Ink metering blade
DE3844138A1 (de) * 1988-12-28 1990-08-02 Wifag Maschf Dosiermesser zum zonenweisen dosieren eines farbfilms
US5461979A (en) * 1992-10-19 1995-10-31 Bruni Ag Grafische Maschinen Multiple blade ink knife
DE4323047A1 (de) * 1993-07-09 1995-03-23 Jansen Herfeld Roettger Fa Farbmesser mit Schlitzen und Rillen
US5694850A (en) * 1996-05-31 1997-12-09 Tech-Energy Co. Composite ink fountain blade

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9714562A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116141831A (zh) * 2023-03-10 2023-05-23 上海华太智科信息技术有限公司 一种琴键式隔色分区遥控印刷机墨斗

Also Published As

Publication number Publication date
US5974966A (en) 1999-11-02
ATE188915T1 (de) 2000-02-15
CA2235255A1 (fr) 1997-04-24
CZ114598A3 (cs) 1998-07-15
JPH11514309A (ja) 1999-12-07
NZ319097A (en) 1999-05-28
CA2235255C (fr) 2005-09-13
SK47698A3 (en) 1999-02-11
CZ293716B6 (cs) 2004-07-14
SK282807B6 (sk) 2002-12-03
AU701694B2 (en) 1999-02-04
BR9611110A (pt) 1999-12-28
AU7124396A (en) 1997-05-07
WO1997014562A1 (fr) 1997-04-24
DE59604252D1 (de) 2000-02-24
ES2144770T3 (es) 2000-06-16
EP0855959B1 (fr) 2000-01-19

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