EP1092535A1 - Rakel - Google Patents

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Publication number
EP1092535A1
EP1092535A1 EP99308050A EP99308050A EP1092535A1 EP 1092535 A1 EP1092535 A1 EP 1092535A1 EP 99308050 A EP99308050 A EP 99308050A EP 99308050 A EP99308050 A EP 99308050A EP 1092535 A1 EP1092535 A1 EP 1092535A1
Authority
EP
European Patent Office
Prior art keywords
doctor blade
diamond
ink
printing
carbon coating
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Withdrawn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
EP99308050A
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English (en)
French (fr)
Inventor
Tatsuo Shigeta
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.)
Think Laboratory Co Ltd
Original Assignee
Think Laboratory Co 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 Think Laboratory Co Ltd filed Critical Think Laboratory Co Ltd
Priority to EP99308050A priority Critical patent/EP1092535A1/de
Publication of EP1092535A1 publication Critical patent/EP1092535A1/de
Withdrawn legal-status Critical Current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
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/06—Details
    • B41F9/08—Wiping mechanisms
    • B41F9/10—Doctors, scrapers, or like devices
    • B41F9/1072—Blade construction
    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/005—Coverings for wipers

Definitions

  • the present invention relates to a doctor blade that is abutted against a gravure printing roller so as to fill the cells of the printing roller with ink and scrape off any excess ink.
  • Figure 3 illustrates a doctor apparatus in a conventional gravure printer.
  • the reference numeral 1 is a gravure printing roller and 2 is a doctor blade of the doctor. apparatus.
  • a doctor apparatus (not shown) supports the doctor blade 2, and the distal end of the doctor blade 2 is abutted against the gravure printing roller 1 so that the blade 2 can scrape off any excess ink from the surface of the roller 1.
  • the distal end of the doctor blade 2 is shaped into a knife edge.
  • the doctor blade 2 slowly slides laterally in the direction indicated by the. arrow A during printing, so that a single point of the knife edge of the doctor blade 2 is prevented from always being in contact with just one point in the longitudinal direction on the surface of the gravure printing roller 1, thus ensuring that the distal edge can wear evenly.
  • doctor blade 2 does not slide laterally in the direction of arrow A during printing, the wear at the distal end of the doctor blade 2 would not be even, a few places along the distal end would wear faster than other places, and the ink scraping function at these places would be lost, resulting in continuous lines in the circumferential direction of the plate that are not present in the a plate image. In other words, the printing would have doctor streaks that occur in numerous unpredictable places.
  • Prior art pertaining to doctor blades includes Japanese Patent Application Laid-Open Nos. S61-12396, S62-227645, S62-238743, S62-503085, S63-25038, S63-116852, S63-246249, H3-007394, H4-012853, H4.070341, H4-070342, H4-296556, H6039991, 1.17-276601, H8-164598, H9.254356, H10.278222, and H10-337840, and Japanese Utility Model Application Laid-Open Nos, 562-005959 and S63-094576.
  • U.S. Patents 5.638,151 and 4,895,071 also relate to doctor blades, but both are for improvements in the shape and support structure of the doctor blade.
  • the organic solvent that is contained in the oil-based ink in amounts over 50% volatilizes and contributes to atmospheric pollution, so there is a great deal of interest in converting to water-based ink gravure printing in which the alcohol content is only 5 to 10%.
  • Plate fogging is a phenomenon in which ink goes under the doctor blade and remains in the non-printing area on the plate surface, and since this ink does not dry enough by the time it is printed, the ink is transferred to the printed matter and the image is soiled. This phenomenon occurs when the printing rate is too high or the number of printed sheets is large, resulting in accelerated wear of the doctor blade.
  • Plate fogging is particularly pronounced when a water-based ink is used, and it is a very difficult problem to eradicate at the present time, but it also occurs when oil-based inks are used.
  • a roller surface is buffed to a extremely high-precision mirror surface, cells are then formed and chrome plating is performed to provide printing durability, the plating burrs are removed, and oil-based ink gravure printing is performed with this extremely high-precision mirror surface.
  • the doctor blade is equipped with a knife edge capable of performing an ink scraping function extremely well.
  • the doctor blade is able to scrape the oil-based ink away from the non-printing area of the plate surface so that one whatsoever remains behind.
  • the scraping of the ink in this process means that there is no lubricant present between the doctor blade and the plate surface Consequently, the relative coefficient of friction between the doctor blade and the nonprinting area of the plate surface becomes high, the doctor blade and the plate surface are prone to wear, the ink scraping function of the doctor blade decreases, and the plate surface soon becomes rough.
  • the oil-based ink goes past the doctor blade and remains in the non-printing area This results in plate fogging.
  • a roller with surface roughness is buffed to an extremely high-precision mirror surface with a 2000 to 3000 grit whetstone, cells are formed thereon, chrome plating is performed so as to provide printing durability, any burrs are removed, and hand polishing is performed so that sandpaper marks remain with sufficient uniformity,
  • the plate surface m have self. lubricity; and as a result, printing in which no plate fogging will occur can be accomplished in oil-based ink gravure printing.
  • Sandpaper marks are left in the non-printing area when the chrome plating that provides the plate surface with printing durability is rubbed with sandpaper.
  • a doctor blade is abutted against the gravure printing roller to fill the cells with ink and scrape off any excess ink. Then, the minute amount of oil-based ink that fills the sandpaper marks goes under the doctor blade.
  • the oil-based ink that remains in the sandpaper marks under the doctor blade contains very little pigment and a large proportion of resin and solvent. Also, when the oil-based ink that remains in the sandpaper marks goes under the doctor blade, the resin and solvent contained therein act as a lubricant between the doctor blade and the plate surface. Accordingly, the relative coefficient of friction between the doctor blade and the non-printing area of the plate surface becomes lower, and the wear of the doctor blade knife edge and wear of the plate surface can be kept low.
  • the minute amount of oil-based ink remaining in the sandpaper marks form an extremely thin film, there is a remarkable increase in the proportional surface area exposed to the dried air, and the solvent in this oil-based ink volatilizes within a very short period of time until it reaches the printing location at a printing rate of 110 to 130 m/min.
  • the pigment and resin are drawn to the bottom of the sandpaper marks, enter a lightly dried state, and are not transferred to the printed matter.
  • the pigment and resin that are thus drawn to the bottom of the sandpaper marks and lightly dried are impregnated with solvent and wetted when again brought together with the oil-based ink applied thereover; thus they do not dry and build up at the bottom of the sandpaper marks.
  • plate fogging does not occur over time with printing. If the printing rate is set to be high, however, the minute amount of oil-based ink that remains in the sandpaper marks formed in the non-printing area that goes under the doctor blade will not volatilize within the time that elapses until the printing location is reached, As a result, plate fogging occurs.
  • the doctor blade can scrape the water-based ink away from the non-printing area of the plate surface so that none whatsoever remains behind,
  • the doctor blade can scrape the water-based ink away from the non-printing area of the plate surface so that none whatsoever remains behind,
  • the high relative coefficient of friction between the doctor blade and the non-printing area of the plate surface there is rapid wear, and the surface soon becomes rough.
  • the water-based ink passes by the doctor blade and remains in the non-printing area, causing much plate fogging.
  • Possible causes are as follows: because the concentration of pigment components is about 30% higher in a water-based ink than in an oil-based ink, the water-based ink that lies in the sandpaper marks and goes under the scraping of the doctor blade has a higher pigment concentration; because the drying of pigment through the evaporation of water involves a far higher drying load than the drying of pigment through the volatilization of an organic solvent, drying is slower, which means that the water-based ink that goes under the doctor blade will not dry sufficiently in the very short time before the printing position is reached, and particular, combined water that binds to pigments and resin does not readily volatilize; and because the pigment and resin that have been drawn to the bottom of the sandpaper marks and lightly dried have a lower affinity with water than with a solvent, even when they are again brought together with the water-based ink that is applied by a furnisher roller, it takes time for them to mix with the water or alcohol that are components of the ink, and they continue to accumulate at the bottom of the sandpaper marks,
  • the relative lubricity between the doctor blade and the plate surface must be increased and plate fogging also must be prevented by some other means without forming sandpaper marks in the nonprinting area.
  • the present invention was conceived in light of the above-described prior art problems, and an object of the present invention is to provide a doctor blade that is abutted against a gravure printing roller so as to fill the cells with ink and scrape off any excess ink in which the service life of the doctor blade can be extended.
  • the present invention provides a doctor blade whose distal end is abutted against a gravure printing roller to fill the cells with ink and scrape off any excess ink, wherein the doctor blade comprises: a metal core formed from a thin stainless steel sheet or a thin carbon steel sheet that is quench hardened and whose distal end has a knife edge, and a diamond-like carbon coating that at least coats both sides of the distal end of the core.
  • the present invention further provides a doctor blade whose distal end is abutted against a gravure printing roller to fill the cells with ink and scrape off any excess ink, wherein the doctor blade comprises a metal core formed from a thin stainless steel sheet or a thin carbon steel sheet that is quench hardened and whose distal end has a knife edge, a diamond-like carbon coating that over-coats at least both sides of the distal end of the core, and an undercoat that is provided between the core and the diamond-like carbon coating so as to coat at least one or both sides of the distal end of the core, the undercoat being harder than the core but softer than a diamond-like carbon coating and increasing the hardness of the core.
  • the doctor blade 3 shown in Figure 1 comprises a core 3a and a diamond-like carbon coating 3c that coats the core 3a.
  • the doctor blade 3 shown in Figure 2 comprises a core 3a, an undercoat 3b that coats the care 3a, and a diamond-like carbon coating 30 that over-coats the undercoat 3b.
  • doctor blade 3 of the first and second embodiments of the present invention will be described collectively.
  • the doctor blade 3 comes in different dimensions depending upon the size and mechanism of the gravure printing roller, but in specific terms the dimensions of the doctor blade 3 are 2200 to 1050 mm long x 60 to 80 mm wide x 120 to 180 ⁇ m thick.
  • One or both sides has a knife edge with a thickness of about 50 to 70 ⁇ m at the distal end, In the shown embodiments, the knife edge is formed on one side or on the right side in Figures 1 and 2. The location of this knife edge is determined according to the diameter of the gravure printing roller, and the knife edge is abutted against the gravure printing roller at an angle thereto, serving to scrape off any excess ink and to fill the cells of the gravure printing roller with ink.
  • the core 3 a in the shown embodiments is formed from a thin steel sheet or stainless steel that is flexible without being too pliant, the distal end of which having a knife edge. If the core 3a is made of a steel sheet. it will be composed of carbon steel which has a Vickers hardness of approximately 600 when quenched.
  • the term "knife edge" used here encompasses a wedge-shaped cross section where the thickness steadily decreases toward the distal end, as well as a stepped cross section where the distal end grows thinner in one or a plurality of steps.
  • the undercoat 3b is applied to one or both sides of the core 3a, on the ink scraping side, in a thickness of about 5 to 10 ⁇ m.
  • the undercoat 3b is provided in order to increase the wear strength of the core 3a and is composed of a plating material or a ceramic material that is harder than the core 3a. On the other bond, the undercoat 3b must be softer than the diamond-like carbon coating 3c, If the undercoat 3b is harder than the diamond like carbon coating 3c, the wear strength of the core 3a will increase excessively, the diamond-like carbon coating 3c will wear down first, and the undercoat 3b will be exposed and end up scraping the ink off the plate surface.
  • the undercoat 3b has a high coefficient of sliding friction, it will rapidly wear down the plate surface. Also, because the undercoat 3b is hard and has a high Young's modulus, no special effect will be realized in terms of the pronounced plate fogging that occurs in water-based ink gravure printing.
  • the hardness of the plate surface is a Vickers hardness of 1000 to 1100 when it is a hard chrome plating. Therefore, it is preferable for the undercoat 3b to be softer than the plate surface. The reason for this is that since the undercoat 3b also rubs on the plate surface, either a material that is hard but has a low coefficient of friction must be selected as the undercoat 3b or a material that is softer than the plate surface must be selected in order to minimize the wear of the plate surface.
  • a favorable material for the undercoat 3b is a ceramic composite nickel plating.
  • This plating involves an addition of a suitable amount of one or more types of ceramic micro-powder selected as needed from the group of silicon carbide, baron nitride, and various other such ceramic micro-powders to an electroless nickel bath or an electro-nickel bath; and the plating is performed under agitation As a result, a nickel plating is applied, and simultaneously the above-described micro-powder precipitates inside the plating film. This plating may be baked if necessary.
  • the undercoat 3b may also be formed by hard nickel plating or soft chrome plating. Alternatively, it may be formed from a silicon nitride ceramic, zirconia, or the like; and alumina may also be flame sprayed.
  • the undercoat 3b is applied to at least one or both sides of the knife edge of the core 34,
  • the undercoat 3b is formed in a thickness of approximately 5 to 10 ⁇ m.
  • the thickness can vary depending upon the type of undercoat to be used.
  • alumina When alumina is applied by flame spraying, it can be formed on just one side, which is on the ink scraping side, of the knife edge of the core 3a.
  • the doctor blade 3 shown in Figure 1 has no undercoat 3b, and there is no wear strength enhancement for the core 3a. Thus, this doctor blade wears faster than the doctor blade 3 shown in Figure 2.
  • the diamond-like carbon coating 3c is a coating of an amorphous carbon compound formed in a thickness of 0.1 to 5 ⁇ m by a thin film formation technique carried out under a vacuum on both sides of the core 3a which has beet coated with the undercoat 3b.
  • the diamond-like carbon coating 3c may be formed by vapor deposition, sputtering. ion plating or vapor phase epitaxy.
  • the diamond-like carbon coating 3c has far better surface smoothness, hardness, and wear resistance than quenched carbon steel or stainless steel.
  • the coefficient of friction of the diamond-like carbon coating is extremely low, being only about one-quarter of the coefficient of friction of a TiN film, CrN film.
  • the hardness of the diamond-like carbon coating varies depending upon the material on which the coating is to be formed, but it is said the hardness is to be a Vickers hardness of about 500 when the coating is formed on silicone rubber, and about 2000 to 3000 when the coating is formed on titanium steel.
  • the reason to form the diamond-like carbon coating 3c in the present invention so as to cover both sides of the knife edge of the doctor blade 3 is to enhance the wear resistance of the doctor blade, to prevent the pronounced plate fogging from occurring in water-based ink gravure printing, and to minimize the wear of the plate surface.
  • Polishing the plate surface into a mirror finish means that virtually none of the ink will pass under the doctor blade, and it also means that the self-lubricity of the plate surface will be kept low, It is expected that the coefficient of friction between the doctor blade and the plate surface will be higher, and the wear of both the doctor blade and the plate surface will be faster.
  • doctor blade shown in Figure 1 comprises the core 3a covered with the diamond-like carbon coating 3c; and the doctor blade shown in Figure 2 comprises the core 3a coated with the undercoat 3b so as to increase the hardness of the core 3a, and the undercoat 3b is further covered with the diamond-like carbon coating 3c.
  • the diamond-like carbon coating 3c bears the majority of the frictional force, and the diamond-like carbon coating has extremely high wear resistance as well as an extremely low coefficient of friction (about one-quarter of the coefficient of friction of a TiN film, CrN film, TICN film, or cemented carbide), while the frictional force to which the end face at the knife edge of the undercoat and the core (which have a higher coefficient of friction) are subjected is kept low. Accordingly, the coefficient of friction can be kept low for the doctor blade as a whole.
  • the force at which the doctor blade presses on the plate surface has a pressure distribution such that the force is greater on the ink scraping side and decreases toward the back side.
  • the end face at the knife edge of the undercoat 3b and the core 3a has a high coefficient of friction, but since the surface area of contact with the plate surface is far greater than that of the diamond-like carbon coating 3c, the pressure per unit of surface area is far lower than that of the diamond-like carbon coating 3c, and this end face therefore contributes very little to the wearing down of the plate surface.
  • the diamond-like carbon coating 3c which has a greater pressure per unit of surface area, contributes more to the wearing down of the plate surface; and the contribution of the diamond-like carbon coating 3c on the ink scraping side is particularly great.
  • the diamond-like carbon coating 3c has outstanding characteristics. It has extremely high hardness and wear resistance, its surface is extremely smooth, it has good slip properties because its coefficient of friction is only g m 0.12, and its surface energy is extremely low and very little frictional heat is generated; thus, there is no danger of seizure occurring. Accordingly, this diamond-like carbon coating contributes to the wearing down of the plate surface sufficiently less than in the past.
  • the end face at the knife edge of the undercoat 3b and core 3a does not readily wear down, either.
  • the and face at the knife edge of the undercoat 3b and core 3a is softer and has less wear resistance than the diamond-like carbon coating 3c; thus it wears down along with the diamond-like carbon coating 3c on the ink scraping side. If the diamond-like carbon coating 3c wears down, the end face at the knife edge of the undercoat 3b and the core 3a, cannot remain exposed.
  • the diamond-like carbon coating 3c on the back side effectively inhibits the wearing down of the end face at the knife edge of the undercoat 3b and the core 3a.
  • the undercoat 3b consists of a hard and brittle ceramic
  • the diamond-like carbon coating 3c that over-coats the undercoat 3b prevents cracks from developing in this ceramic.
  • the coefficient of friction between the doctor blade and the plate surface that has been polished to a mirror finish is avoided from increasing, and the diamond-like carbon coating has extremely high wear resistance. Accordingly, the knife edge of the doctor blade can continue indefinitely to remove the ink even when the printing is carried out at a practical printing speed and for an extended printing length.
  • the diamond-like carbon coating 3c slides over the plate surface, fills the cells with ink and scrapes off any excess ink. Because of its very smooth surface and its extremely low Young's modulus, the diamond-like carbon coating 3c can continue indefinitely to remove the ink very well.
  • the diamond-like carbon coating 3c has an extremely low Young's modulus and is elastic, unlike a ceramic or TiN, CrN, TiCN, or the like. Accordingly, the portion in contact with the plate surface deforms, albeit slightly, as it slides, and as a result the coefficient of friction g is extremely low (0.12) and the wear of the plate surface can be kept to a minimum. Furthermore, because the diamond-like carbon coating 3c has low surface energy, very little heat is generated by friction, and there is no danger of seizure occurring.
  • the smoothness and linearity of the knife edge are high, the wettability is good, the hardness is high, the Young's modulus is low, and the film is flexible. Accordingly, the doctor blade slides easily over the plate surface.
  • the doctor blade tends to get very close to the water-based ink tying in the sandpaper marks formed in the non-printing area of the plate surface; and since an extremely small amount of ink goes under the, doctor blade, the wear resistance is high, and good ink removal by the knife edge of the doctor blade is maintained indefinitely, All of this effectively avoid plate fogging; and no plate fogging occurs oven when the printing is curled out at a practical printing speed and for an extended printing length.
  • being able to minimize the wear of the plate surface allows roughening of the surface of the non-printing area over time during printing to be suppressed, which is an effective means for preventing plate fogging.
  • a ceramic doctor blade has a large coefficient of friction and causes plate fogging due to greater wear of the plate surface.
  • the doctor blade 3 of the present invention has both sides of a quenched carbon steel knife edge or a stainless steel knife edge that is covered with the diamond-like carbon coating. This gives it better wear resistance than that of a ceramic, and it therefore has a longer service life, There is no danger of the blade chipping or doctor streaking, Thus, the doctor blade has higher reliability.
  • a ceramic doctor blade also has low wear and a long service life, but it is susceptible to blade chipping and doctor streaking.
  • a core of quenched carbon steel with a thickness of 150 ⁇ m was coated with a diamond-like carbon coating in a thickness of 4 ⁇ m to produce a doctor blade of the embodiment shown in Figure 1. Its doctor blade was tested, No plate fogging occurred at a practical printing speed of 110 to 130 m/min, which is the same speed as in oil-based ink gravure printing.
  • both sides of a core of quenched carbon steel with a thickness of 150 ⁇ m were coated with an undercoat composed of a ceramic composite nickel plating with a thickness of 10 ⁇ m, and this was over-coated with a diamond-like carbon coating in a thickness of 4 ⁇ m, thus producing a doctor blade of the embodiment shown in Figure 2.
  • This doctor blade was tested. No plate fogging occurred at a practical printing speed of 110 to 130 m/min, which is the same speed as in oil-based ink gravure printing.
  • an undercoat with a thickness of 10 ⁇ m was formed by flame spraying on the ink scraping side of a core of quenched carbon steel with a thickness of 150 ⁇ m, and both sides of this were over-coated with a diamond-like carbon coating in a thickness of 4 ⁇ m to produce a doctor blade of the embodiment shown in Figure 2.
  • This doctor blade was tested. No plate fogging occurred at a practical printing speed of 110 to 130 m/min. which is the same speed as in oil-based ink gravure printing. Printing was continued with this doctor blade for 100,000 meters, but still no doctor streaks or whiskers were observed.
  • the doctor blade of embodiment shown in Figure 2 and described in (1) above was installed in a doctor apparatus, and water-based ink gravure printing was performed (the water-based ink was Aquapia White (trade name; contains titanium white) made by Toyo Ink Inc.). After printing for 28,000 meters, the amount of wear on the knife edge was measured and found to be 86 ⁇ m. This was a proportion of 30 ⁇ m. of wear for every 10, 000 meters of printing.
  • a diamond-like carbon coating was produced by plasma CVD for the doctor blade of the present invention, and the annealing hardness was measured.
  • the temperature during the production of the diamond-like carbon coating by thermolabeling was 210°C on the inner surface of the film and 200°C on the outer surface.
  • the blade core 3a was not annealed by the heating during film formation, the hardness was maintained at a Vickers hardness of 600, and the blade core 3a did not end up having a hardness that is too low for the support of the diamond-like carbon coating.
  • the core 3a composed of carbon steel or stainless steel is coated with the diamond-like carbon coating 3c; and according to the doctor blade of the present invention shown in Figure 2, the core 3a composed of carbon steel or stainless steel is coated on one or both sides thereof with the undercoat 3b that is harder than the core 3a and then over-coated with the diamond-like carbon coating 3c.
  • the doctor blade shown in Figure 2 has a longer service life than the doctor blade shown in Figure 1 because the hardness of the core 3a is increased by the undercoat 3b.
  • the doctor blade of the present invention no plate fogging occurs in water-based ink gravure printing even when the printing is carried out at a practical printing speed and for a practical printing length (the number of printed sheets). Also, with the doctor blade having the diamond-like carbon coating thereon, since the knife edge of the doctor blade has good smoothness and linearity, high wettability, and a flexibility on the surface, the knife edge stays closes to the water-based ink lying in the sandpaper marks formed in the non-printing area of the plate surface, and the amount of ink that goes under the doctor blade is markedly reduced. Thus, plate fogging can be effectively avoided.
  • the doctor blade of the present invention since wear of the plate surface can be kept to a minimum, the number of sheets that can be printed by the plate surface ran be substantially increased to at least double; and chrome replating only needs to be performed half as frequently.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
EP99308050A 1999-10-13 1999-10-13 Rakel Withdrawn EP1092535A1 (de)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6633739B2 (en) * 2001-12-17 2003-10-14 Xerox Corporation Detoning blade
EP1588854A1 (de) * 2004-04-22 2005-10-26 Kba-Giori S.A. Farbkasten in einer Druckmaschine
GB2448352A (en) * 2007-04-12 2008-10-15 Dek Int Gmbh Wiper blade for a screen printing machine
EP2090672A1 (de) * 2008-02-05 2009-08-19 Akiko Hirai Verfahren zur Herstellung einer Klinge mit harter Nitridschicht
CN103568483A (zh) * 2013-10-14 2014-02-12 安徽华印机电股份有限公司 一种印刷装置
WO2017067209A1 (zh) * 2015-10-23 2017-04-27 湖南三泰新材料股份有限公司 一种不锈钢/碳钢双金属角钢及其复合成型工艺
SE2251595A1 (en) * 2022-12-29 2024-06-30 Primeblade Sweden Ab Composite doctor blade

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05192629A (ja) * 1991-12-03 1993-08-03 Mitsubishi Heavy Ind Ltd コータブレードの製造方法
EP0728579A1 (de) * 1995-02-27 1996-08-28 Rolf Meyer Rakel für Tiefdruck-Rotationsmaschinen sowie Verfahren und Vorrichtung zu deren Herstellung
DE19517560A1 (de) * 1995-05-12 1996-11-14 Tzn Forschung & Entwicklung Auftragsvorrichtung zum Aufbringen einer Streichmasse auf eine Materialbahn
US5778785A (en) * 1995-10-26 1998-07-14 Heidelberger Druckmaschinen Ag Zonal ink fountain blade for a rotary printing press
EP0908309A1 (de) * 1997-10-08 1999-04-14 Rolf Meyer Druckrakel und Verfahren zur Herstellung derselben

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05192629A (ja) * 1991-12-03 1993-08-03 Mitsubishi Heavy Ind Ltd コータブレードの製造方法
EP0728579A1 (de) * 1995-02-27 1996-08-28 Rolf Meyer Rakel für Tiefdruck-Rotationsmaschinen sowie Verfahren und Vorrichtung zu deren Herstellung
DE19517560A1 (de) * 1995-05-12 1996-11-14 Tzn Forschung & Entwicklung Auftragsvorrichtung zum Aufbringen einer Streichmasse auf eine Materialbahn
US5778785A (en) * 1995-10-26 1998-07-14 Heidelberger Druckmaschinen Ag Zonal ink fountain blade for a rotary printing press
EP0908309A1 (de) * 1997-10-08 1999-04-14 Rolf Meyer Druckrakel und Verfahren zur Herstellung derselben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 622 (C - 1130) 17 November 1993 (1993-11-17) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6633739B2 (en) * 2001-12-17 2003-10-14 Xerox Corporation Detoning blade
EP1588854A1 (de) * 2004-04-22 2005-10-26 Kba-Giori S.A. Farbkasten in einer Druckmaschine
WO2005102701A1 (fr) 2004-04-22 2005-11-03 Kba-Giori S.A. Encrier pour machine d’impression
GB2448352A (en) * 2007-04-12 2008-10-15 Dek Int Gmbh Wiper blade for a screen printing machine
WO2008125297A1 (en) * 2007-04-12 2008-10-23 Dek International Gmbh Wiper blade for a screen printing machine and method of manufacturing the same
EP2090672A1 (de) * 2008-02-05 2009-08-19 Akiko Hirai Verfahren zur Herstellung einer Klinge mit harter Nitridschicht
CN103568483A (zh) * 2013-10-14 2014-02-12 安徽华印机电股份有限公司 一种印刷装置
WO2017067209A1 (zh) * 2015-10-23 2017-04-27 湖南三泰新材料股份有限公司 一种不锈钢/碳钢双金属角钢及其复合成型工艺
SE2251595A1 (en) * 2022-12-29 2024-06-30 Primeblade Sweden Ab Composite doctor blade

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