• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. Screening method for multicolour printing, the screen elements being produced in chronological succession dot by dot and line by line by engraving, erosion or exposure, electromechanically, by high-energy radiation, or electro-optically, characterized in that screens are utilized of a type in which the line spacings (feed direction) operate with respect to each other in the different screens of a set of colour separations, as well as the screen dot spacings within the lines of this set of screens, approximately like small rational numbers and that - additionally - the number of screen dots per areal unit in at least two screens of a set of colour separations differs from each other by a factor of between 1.5 and 4.
    公开号:SU1246906A3
    申请号:SU813368802
    申请日:1981-12-24
    公开日:1986-07-23
    发明作者:Юнг Юггерт；Вадле Хайнрих
    申请人:Др-Инж.Рудольф Хелль Гмбх (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to multi-color printing, and more specifically to rasters for scanning devices for the synthesis of raster forms.
    The purpose of the invention is to improve the quality of reproduction when printing together.
    FIG. 1 and 2 are examples of a schematic arrangement of the raster points for a multi-color print, free from the play of colors and moire
    FIG. 1 and 2 four configurations are indicated, moreover U means the direction around the circumference of the cylinder-fourth of the holder, and V the direction of supply of the synthesizing element. The corner points of the quadrilaterals are: centers of raster cells. The coarser square screen is predominantly intended for yellow ink, red and blue ink is printed. In 2: 3 or 3: 2 configurations. A square raster, which is two times thinner than yellow (Fig. 1), and the thinnest, rhombic raster (Fig. 2) is intended for black ink.
    These elements of the rasters are formed one after the other, successively in time by engraving, erosion or glare, electromechanically by means of high-energy radiation or by an electro-optical method, as well as by rasterization using glass copying rasters during the classical manufacture of forms by etching.
    V
    five
    0
    five
    0
    five
    At the same time, the observed effect is equivalent to the inclination of the rasters in the forms for different paints.
    Other rational relations of inter-element distances, not exceeding 5, are possible, as well as other raster distributions between separations, while the number of elements per unit area of different raters can differ by 1.4-10 times.
    Formula inventions
    权利要求:
    Claims (3)
    [1]
    1. A set of multi-color raster prints, mainly for scanning devices for the synthesis of raster forms, including a combination of square and rhombic raster cells, characterized in that, in order to improve the quality of reproduction during joint printing, the distance between lines in rasters, and also the distance between raster images dots inside raster lines of one set are related to rs as rational numbers less than five, and the number of elements
    per unit area of at least two rasters differs 1.4-10 times.
    [2]
    2. A set of rasters according to claim 1, wherein the distances between the lines of the rasters are 3: 3: 2: 1.5, and the distances between the points of the rasters in the lines are 3 : 2: 3: 1.5.
    [3]
    3. Set of rasters on pi. 1 and 2, characterized in that the distance between the points of the rasters
    in the lines, the ratio is 3: 2: 3: 2.
    Have
    Phie.1
     | NIIP Order 4030/60 Circulation 436
    Random polygons pr-tie, g, Uzhgorod, st. Project, 4
    Subscription
    FIG. 2
    Subscription
    类似技术:
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    US1872943A|1932-08-23|Halftone process and type
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    同族专利:
    公开号 | 公开日
    DE3172094D1|1985-10-10|
    US4585309A|1986-04-29|
    DK18682A|1982-07-25|
    JPS57144552A|1982-09-07|
    ATA557381A|1985-08-15|
    EP0056829B1|1985-09-04|
    AT379988B|1986-03-25|
    JPH0474697B2|1992-11-26|
    EP0056829A1|1982-08-04|
    US4443060A|1984-04-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1112407B|1961-01-09|1961-08-03|Hell Rudolf Dr Ing Fa|Screening process for the production of a printing form set for multi-color printing|US4758886A|1986-07-24|1988-07-19|Minnesota Mining And Manufacturing Company|Optimal color half-tone patterns for raster-scan images|
    US5583660A|1990-09-14|1996-12-10|Minnesota Mining And Manufacturing Company|Non-perpendicular, equal frequency non-conventional screen patterns for electronic halftone generation|
    US5258832A|1990-09-14|1993-11-02|Minnesota Mining And Manufacturing Company|Non-perpendicular, unequal frequency non-conventional screen patterns for electronic halftone generation|
    US5323245A|1990-09-14|1994-06-21|Minnesota Mining And Manufacturing Company|Perpendicular, unequal frequency non-conventional screen patterns for electronic halftone generation|
    US5253084A|1990-09-14|1993-10-12|Minnesota Mining And Manufacturing Company|General kernel function for electronic halftone generation|
    US5264926A|1990-09-14|1993-11-23|Minnesota Mining And Manufacturing Company|Perpendicular, equal frequency non-conventional screen patterns for electronic halftone generation|
    AU4237593A|1992-05-06|1993-11-29|Microsoft Corporation|Method and system of color halftone reproduction|
    DE69308632T2|1992-05-22|1997-10-02|Agfa Gevaert Nv|Improved method for frequency-modulated halftone screening|
    DE4330258A1|1993-09-07|1995-03-09|Creaktiv Design Koenig Gmbh|Process and apparatus for producing colour images with at least two colours|
    US5552898A|1994-07-06|1996-09-03|Agfa-Gevaert|Lossy and lossless compression in raster image processor|
    ES2120914B1|1997-02-05|1999-06-01|Carrasco Martinez Vicente|METHOD FOR PRINTING IN POLYCHROMIA ON VARIOUS SURFACES.|
    DE19815165B4|1998-04-04|2005-03-24|Hell Gravure Systems Gmbh|Method for engraving printing forms|
    EP1044808B1|1999-04-14|2007-11-28|MDC Max Dätwyler Bleienbach AG|Method for the generation of engraving data|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    EP19810100520|EP0056829B1|1981-01-24|1981-01-24|Screens for multicolour printing without colour drift|
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