Title:
METHOD AND APPARATUS FOR TRANSFERRING INK FOR PRINTING UNIT FOR OFFSET PRINTER
Document Type and Number:
Japanese Patent JP3464050
Kind Code:
B2
Abstract:
PURPOSE: To accurately regulate an ink distribution necessary to offset print for reducing its cost and to coat with the ink by controlling the ink distribution according to digital data introduced from engraving data for generating two-dimensional ink distribution of width and circumferential directions on an outer surface corresponding to ink using.
CONSTITUTION: Ink droplets 8, 9 and 10 are formed by an ink jet unit at each rotation of an ink roller 4 to coat lattice-like elements 7 on a surface of the roller 4. Number of the elements 7 is decided by circumferential and width directions M, N of the roller 4. The smaller the elements 7 are, the better the elements 7 are. For example, a length of the width direction is smaller than 0.1 mm. The elements 7 are coated with predetermined number of ink droplets 8 to 10, and coated with ink amounts of a predetermined volume V(i, j). The volume V(i, j) to surface elements i, j are controlled to satisfy the formula, wherein S is an ideal ink layer thickness on the inking roller, S(x, y) is an actual value of the ink layer thickness on the roller corresponding to the elements i, j, and x, y are abscissa and ordinate axes of coordinates.
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Inventors:
Lorant Ripple
Application Number:
JP19056494A
Publication Date:
November 05, 2003
Filing Date:
August 12, 1994
Export Citation:
Assignee:
Heidelberger Druckmaschinen AG
International Classes:
B41F31/08; B41C1/10; B41F31/28; B41M1/06; (IPC1-7): B41F31/08
Domestic Patent References:
| JP5200999A | ||||
| JP5693556A |
Attorney, Agent or Firm:
Nobuyuki Kaneda (2 others)