EP2040931B1 - Stochastisch gelaserte filmwalze - Google Patents

Stochastisch gelaserte filmwalze Download PDF

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Publication number
EP2040931B1
EP2040931B1 EP07787681.1A EP07787681A EP2040931B1 EP 2040931 B1 EP2040931 B1 EP 2040931B1 EP 07787681 A EP07787681 A EP 07787681A EP 2040931 B1 EP2040931 B1 EP 2040931B1
Authority
EP
European Patent Office
Prior art keywords
ink
roller
film roller
film
projections
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.)
Active
Application number
EP07787681.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2040931A1 (de
Inventor
Graham Macfarlane
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.)
Felix Bottcher & Co KG GmbH
Felix Boettcher GmbH and Co KG
Original Assignee
Felix Bottcher & Co KG GmbH
Felix Boettcher GmbH and Co KG
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 Felix Bottcher & Co KG GmbH, Felix Boettcher GmbH and Co KG filed Critical Felix Bottcher & Co KG GmbH
Priority to PL07787681T priority Critical patent/PL2040931T3/pl
Priority to EP07787681.1A priority patent/EP2040931B1/de
Priority to SI200731988T priority patent/SI2040931T1/en
Publication of EP2040931A1 publication Critical patent/EP2040931A1/de
Application granted granted Critical
Publication of EP2040931B1 publication Critical patent/EP2040931B1/de
Priority to CY20171101248T priority patent/CY1119627T1/el
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/06—Shells for rollers of printing machines for inking rollers

Definitions

  • the invention relates to film rolls, to processes for producing the film roll and to their use.
  • Offset presses use rollers to transfer ink from the ink fountain.
  • the first roller, the ink fountain roller or the ink fountain roller picks up ink from the ink fountain and transfers it to a film roller, the distance between the ink fountain roller and the film roller ensuring that only a certain proportion of the ink provided is transferred further.
  • the EP 0 594 016 B1 describes purging rollers with stochastic pattern in gravure printing.
  • the object of the present invention was to provide an apparatus and a method with which the stated disadvantages of the prior art are overcome.
  • the object is achieved by a film roller for offset printing with a surface with elevations and depressions, wherein the elevations and depressions together form an irregular, random pattern.
  • the film roll has irregular, random patterns which form elevations and depressions on the surface.
  • Such patterns are also referred to as stochastic patterns. They arise, for example, in which are removed by a given material on a roll surface by a processing step smaller areas and the machining direction of the tool changes at random; ie e.g. computer-controlled the decision on the change of direction is made at random.
  • depressions as well as the protrusion of material form elevations that extend beyond the original surface.
  • the depressions form passages on the surface. It creates labyrinth-like structures.
  • the elevations form - as in the figures - coherent areas.
  • the film roll according to the invention has no regular patterns.
  • the structure is not only defined by eg a diameter or a depth, but in addition the structure motif randomly changes its directional course on the surface.
  • US 4,763,041 describes a film roll in which cylindrically shaped holes are introduced by means of a pulsed laser. In contrast to the present invention, although this results in irregular holes but not in an irregular random pattern on the surface of the roller. In addition, only holes are formed so that - in contrast to the invention - no surveys arise.
  • FR 2,449,484 describes a roller which has cracks or crevices in subregions of the surface, the surface being made of metal and up to 30% of the surface being covered by cracks. This describes FR 2,449,484 no elevations and depressions, since the polished area has no elevations relative to the roll surface.
  • EP 0 662 394 describes overlays of several regular patterns. Although it is described that the tool used to apply the patterns may have an irregular shape. However, even with this tool, the regular pattern remains on the surface.
  • the film roll according to the invention preferably has a roughness R z measured according to DIN EN ISO 4287 in the range of 200 to 1,000 .mu.m, preferably 400 to 700 .mu.m.
  • the surface of the film roll may consist of different materials, in particular polymers such as polyamide, polyurethane or copper, ceramic or matt chrome are suitable. Rollers of at least 50% polyamide are particularly preferred.
  • the filling volume is also suitable for describing the surface structure.
  • a topography image is examined, with the middle level of the topography image being assigned the height value 0.
  • a filling volume can be calculated, which is a measure of the surface structure.
  • This filling volume is then represented as volume (free volume) per area and is referred to below as V 1 .
  • Preferred free volumes V 1 are between 0.005 and 0.5, more preferably between 0.01 and 0.15 mm 3 / mm 2 .
  • V 2 It is also possible to calculate a filling volume up to the complete filling of the surface, ie between lowest and highest profile value. This is referred to below as V 2 .
  • Preferred volumes are between 0.02 to 1.5 mm 3 / mm 2 , more preferably between 0.06 to 1.0 mm 3 / mm 2 .
  • FIGS. 5 and 6 show by means of a sketch the differences between the filling volume V 1 and V 2 .
  • the calculated volume is represented by the gray areas.
  • the arithmetic mean of the width of the gears is 0.1 and up to 1 mm.
  • the arithmetic mean of the depth of the gears is in the range between 0.1 and 0.5 mm.
  • the width of the webs in the range of 0.3 to 8 mm, preferably 0.5 to 3 mm. It is preferred that the width and depth are matched so that the arithmetic mean of the width and the depth are in the ratio between 3: 1 and 1: 2.
  • the protrusions and depressions form an irregular random pattern having a lower free volume in the peripheral areas of the film roll. This is particularly useful when in the printing press so-called “narrow webs" are driven, i. Webs that do not occupy the entire width of the roller. This causes problems that in the edge areas in which the colors are not removed, the transferred color is thrown off, dries, etc.
  • a lower free volume is preferably present in the edge regions of the film rolls, for example by 20% less than in the middle region, preferably by 10% less than in the middle of the roll.
  • this lower free volume can be compensated by opening the ink keys and otherwise by an increased color guide in these edge regions.
  • the invention furthermore relates to an inking unit which comprises the film roller according to the invention.
  • Ink units usually include a variety of rollers, with which the amount and quality of the paint job is controlled.
  • the inking unit according to the invention therefore comprises, in addition to a Farbduktor, the film roll according to the invention and an applicator roll optionally further rolls, as they are known in the art.
  • the invention further provides a process for producing the film roll according to the invention comprising the step of treating the surfaces with a laser to produce an irregular, random pattern of elevations and depressions.
  • the film roller according to the invention and the inventive method that the color transport is carried out with a better efficiency. This means that less ink remains on the film roll, which ultimately results in less spatter because less ink needs to be transported.
  • the film rolls according to the invention can be cleaned well.
  • the stochastic pattern moreover leads to a lesser abrasion occurring with the film rollers according to the invention.
  • a roll with a polyamide surface coating diameter of about 55 mm was irradiated with the aid of a CO 2 industrial laser (VWA 1200 from Baasel, Starnberg) with 400 W.
  • VWA 1200 from Baasel, Starnberg
  • the roller was rotated and the laser stochastically passed over the surface. From the surfaces thus obtained, the topography was measured.
  • the FIGS. 1a and 1b show a corresponding representation. Subsequently, the roughness values were measured.
  • the Rz measured according to DIN EN ISO 4287 was 415 ⁇ m.
  • a corresponding profile was measured on a cutting line in a topographical image.
  • the filling volumes were calculated as the volume from the wells to the zero line (center between deepest well and highest bump). Based on an area of 50.69 mm 2 , the free volume was 2.192 mm 3 . This corresponds to a free volume V 1 of 0.043 mm 3 / mm 2 , V 2 of 0.182 mm 3 / mm 2 .
  • Example 2 a roll was treated as in Example 1 with 400 W again.
  • the profile around the profile was extended by computer modulations by 75%, so that the valleys and surveys are wider.
  • FIGS. 2a and 2b show a corresponding representation of the profile thus obtained. Again, the roll was measured. The roughness was Rz according to DIN EN ISO 4287 496 ⁇ m. Subsequently, a topography uptake was again carried out and measured as described in Example 1. The result was a volume of 2.617 mm 3 on an area of 50.69 mm 2 . This again corresponds to a free volume V 1 of 0.052, a free volume V 2 of 0.264 mm 3 / mm 2 .
  • a roll as in Example 1 was treated with a power of 600 W, so that the depressions are made deeper.
  • FIGS. 3a and 3b show a corresponding Topographiement.
  • the roughness values were also measured thereon.
  • the result was a Rz according to DIN EN ISO 4287 of 613 microns.
  • a Topographiement was measured in terms of filling volume. This is in the FIGS. 4a and 4b shown.
  • the result was a volume of 3.511 mm 3 on an area of 50.69 mm 2 . This corresponds to a free volume of 0.069 mm 3 / mm 2 , the free volume V 2 0.292 mm 3 / mm 2 .

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP07787681.1A 2006-07-19 2007-07-18 Stochastisch gelaserte filmwalze Active EP2040931B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL07787681T PL2040931T3 (pl) 2006-07-19 2007-07-18 Przybieracz grawerowany laserowo stochastycznie
EP07787681.1A EP2040931B1 (de) 2006-07-19 2007-07-18 Stochastisch gelaserte filmwalze
SI200731988T SI2040931T1 (en) 2006-07-19 2007-07-18 Stochastic laser foil roller
CY20171101248T CY1119627T1 (el) 2006-07-19 2017-11-28 Κυλινδρος υμενιου υποβληθεις σε στοχαστικη επεξεργασια laser

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06117496 2006-07-19
PCT/EP2007/057420 WO2008009699A1 (de) 2006-07-19 2007-07-18 Stochastisch gelaserte filmwalze
EP07787681.1A EP2040931B1 (de) 2006-07-19 2007-07-18 Stochastisch gelaserte filmwalze

Publications (2)

Publication Number Publication Date
EP2040931A1 EP2040931A1 (de) 2009-04-01
EP2040931B1 true EP2040931B1 (de) 2017-09-06

Family

ID=37433866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07787681.1A Active EP2040931B1 (de) 2006-07-19 2007-07-18 Stochastisch gelaserte filmwalze

Country Status (14)

Country Link
US (1) US8561536B2 (zh)
EP (1) EP2040931B1 (zh)
JP (1) JP5543204B2 (zh)
CN (1) CN101489799B (zh)
AR (1) AR061915A1 (zh)
CY (1) CY1119627T1 (zh)
DK (1) DK2040931T3 (zh)
ES (1) ES2650975T3 (zh)
HU (1) HUE037324T2 (zh)
PL (1) PL2040931T3 (zh)
PT (1) PT2040931T (zh)
SI (1) SI2040931T1 (zh)
TW (1) TWI461306B (zh)
WO (1) WO2008009699A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006037615A1 (de) * 2006-08-10 2008-02-14 Felix Böttcher Gmbh & Co. Kg Gummiwalzen mit rauer Oberfläche
DE102008043957A1 (de) 2008-11-21 2010-05-27 Koenig & Bauer Aktiengesellschaft Rasterwalze und Verfahren zu deren Herstellung
US8462391B2 (en) * 2009-03-13 2013-06-11 Heidelberger Druckmaschinen Ag Method for producing a pseudo-stochastic master surface, master surface, method for producing a cylinder cover, cylinder cover, machine processing printing material, method for producing printed products and method for microstamping printing products
WO2011069998A1 (de) * 2009-12-07 2011-06-16 Felix Böttcher Gmbh & Co. Kg Reiberwalzen
DE102010007648A1 (de) 2010-02-11 2011-03-10 Heidelberger Druckmaschinen Ag Farbwerk einer Druckmaschine
JP6013305B2 (ja) * 2013-10-30 2016-10-25 住友理工株式会社 紙送り用ローラ
GB2546748A (en) * 2016-01-26 2017-08-02 Sandon Global Engraving Tech Ltd Liquid-bearing articles for transferring and applying liquids

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US3924313A (en) * 1974-05-24 1975-12-09 Standex Int Corp Metal applicator roll
CA1129247A (en) 1979-02-26 1982-08-10 Edward P. Macconnell Fluid roller
US4793041A (en) * 1979-05-03 1988-12-27 Jerome D. Jenkins Transfer roll with ceramic-fluorocarbon coating containing cylindrical ink holes with round, beveled entrances
US4763041A (en) 1983-10-24 1988-08-09 Ricoh Company, Ltd. Dot array fluorescent tube for writing optical information in optical printer
JPS60144923A (ja) 1983-12-31 1985-07-31 関西電力株式会社 コンデンサ装置
JPS60202059A (ja) * 1984-03-27 1985-10-12 Sharp Corp コピ−用紙収容ソ−タ
JPH0353891Y2 (zh) * 1985-09-20 1991-11-26
JP2802073B2 (ja) 1987-07-10 1998-09-21 株式会社金陽社 インキ受渡しロールの製造方法
JPH01234295A (ja) 1988-03-15 1989-09-19 Mitsubishi Electric Corp マーキング装置
DE3822692C2 (de) 1988-07-05 1996-02-15 Kochsmeier Hans Hermann Rasterwalze in einem Auftragswerk einer Druckmaschine
JPH0720741B2 (ja) * 1988-11-28 1995-03-08 株式会社東京機械製作所 ダンプニングローラー、ダンプニングローラーの製造方法および印刷機の湿し水供給装置
JPH0357649A (ja) * 1989-07-25 1991-03-13 Canon Inc 画像形成装置
US5016530A (en) 1989-11-02 1991-05-21 Harris Graphics Corporation Ink mover distributor roll
DE3937749A1 (de) * 1989-11-14 1991-05-16 Jagenberg Ag Rakelstange zum volumetrischen dosieren von beschichtungsmaterial
JP2931719B2 (ja) * 1992-07-09 1999-08-09 株式会社金陽社 印刷用ローラー及びその製造方法
DE4235586C2 (de) 1992-10-22 1998-08-20 Boettcher Gmbh & Co Felix Verfahren zur Übertragung flüssiger Medien von einer Anspülwalze auf einen Tiefdruckzylinder sowie Vorrichtung zur Durchführung des Verfahrens
JP3010403B2 (ja) * 1992-12-08 2000-02-21 富士写真フイルム株式会社 平版印刷版用支持体及びその製造方法
JPH09262965A (ja) 1996-03-29 1997-10-07 Toshiba Mach Co Ltd 印刷機のインキ量調整装置
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Also Published As

Publication number Publication date
SI2040931T1 (en) 2018-04-30
TWI461306B (zh) 2014-11-21
CN101489799A (zh) 2009-07-22
PT2040931T (pt) 2017-12-12
JP5543204B2 (ja) 2014-07-09
US20090320700A1 (en) 2009-12-31
DK2040931T3 (en) 2017-12-04
CN101489799B (zh) 2012-09-26
EP2040931A1 (de) 2009-04-01
JP2009543715A (ja) 2009-12-10
TW200821157A (en) 2008-05-16
US8561536B2 (en) 2013-10-22
CY1119627T1 (el) 2018-04-04
ES2650975T3 (es) 2018-01-23
AR061915A1 (es) 2008-10-01
WO2008009699A1 (de) 2008-01-24
HUE037324T2 (hu) 2018-08-28
PL2040931T3 (pl) 2018-02-28

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