Claims
- 1. A printing machine comprising an assembly of printing control elements for detecting color register deviations in a defined direction, the printing control elements being disposed in groups in a selected region on a printed product produced by a printing press, at least a first group of fields, respectively, formed of a plurality of equidistant geometric figures disposed adjacent one another in a row without gaps therebetween in the defined detecting direction when a print is in register, at least a plurality of the geometric figures having a set color, and at least one geometric figure having another color disposed between every two of the geometric figures having the set color; at least a second group of fields, respectively, formed of a plurality of equidistant geometric figures disposed adjacent one another in a row without gaps therebetween in the defined detecting direction when a print is in-register, at least every third geometric figure of the receptive second group of fields having a set color and, respectively, in the defined detecting direction, one of the geometric figures in another color being disposed adjoining the third figure of the respective second group of fields; and a third group of fields formed as respective one-color full-tone or solid fields for all colors in the print.
- 2. Printing control elements according to claim 1, wherein detecting directions of the respective first and second groups of fields are disposed perpendicularly to one another for detecting color register deviations in circumferential and lateral directions of the printed product.
- 3. Method of regulating color register on a printing press for multicolor printing, which comprises producing with the printing press at least one printing control element on a printing product; obtaining measured data from the printing control element by means of an opto-electronic sensor device and feeding the data to a computation/regulating device; determining an actual color value in the computation/regulating device from the measured data and comparing the actual color value with a nominal color value therein; determining a register deviation from a value obtained by comparing the actual and nominal color values; and generating adjustment signals in the computation/regulating device for transmission to register adjusting devices for compensating for the register deviation, wherein said at least one printing control element is formed of a plurality of equidistant bars disposed adjacent one another in a row without gaps therebetween in a defined detecting direction when a print is in-register; determining the actual color value X from the printing control element by the computation/regulating device, as follows;
- X=0.5*(1-n)*(X1+X2)+0.5*n*(X1+X3),
- wherein n is a fraction of the overlapping pairs of bars with the conventional or standardized color values X1 and X2 in the defined detecting direction, and X3 is the conventional or standardized color value of the printing product in non-printed state.
- 4. Method according to claim 3, which includes determining the values X.sub.1 and X.sub.2 from full-tone or solid fields also printed on the printing product, and the value X.sub.3 from a measurement at non-printed location on the surface of the printed product.
Priority Claims (1)
Number |
Date |
Country |
Kind |
43 35 350.9 |
Oct 1993 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/324,403, filed on Oct. 17, 1994. Now abandoned.
US Referenced Citations (13)
Foreign Referenced Citations (6)
Number |
Date |
Country |
0143744 |
Jun 1985 |
EPX |
0221472 |
May 1987 |
EPX |
0324718 |
Jul 1989 |
EPX |
3719766 |
Jul 1990 |
DEX |
3903981 |
Aug 1990 |
DEX |
4012608 |
Oct 1991 |
DEX |
Non-Patent Literature Citations (1)
Entry |
Tomoyuni Maruhame, Printing Method, Sep. 24, 1991 FD, Japanese Abstract. |
Continuations (1)
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Number |
Date |
Country |
Parent |
324403 |
Oct 1994 |
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