JPH04217259A - Aligning mark printed on material to be printed - Google Patents

Abstract

PURPOSE: To provide a mark allowed to be copied on a printing supporting body such as a printing plate and effectively detected and evaluated similarly by a machine reading means and a visual reading means. CONSTITUTION: Marks 1 to 4 corresponding to respective ink components are constituted of visually readable parts 5, 6 and machine-readable parts 7, 8 and the visually readable parts 5, 6 in each ink component are constituted of similar segments intersecting with each other and the machine-readable parts 7, 8 in each ink component to be printed are constituted of a straight section and a curve section, and the geometric positions of the parts 7, 8 are respectively differently determined. When a registering is accurate, the parts 5, 6 are vertically superposed to each other and the parts 7, 8 are printed out on respectively different prescribed positions of the object to be printed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to registration marks made of geometric shapes and printed on a printing medium in multicolor printing.

0002

BACKGROUND OF THE INVENTION The following is known, for example from European Patent No. 0 094 027.

That is, the printing of predetermined markings for various inks on a printing material support together with the image to be printed. This marking has a defined geometric shape, so that precise electrical detection and evaluation is possible. Marks of this type (also referred to as printed marks or registration marks) are not at all suitable, or at least not very suitable, for visual readout. On the other hand, so-called registration crosses, which are printed together for each ink, are very well suited. The crosses coincide when the registration is accurate, ie they overlap each other, which is easy to visually check. However, on the other hand, this registration cross also
Difficult to detect and evaluate electrically or mechanically.

0004

[Problem to be Solved by the Invention] An object of the present invention is to obtain a mark on a printing support such as a printing plate that can be copied and that can be detected and evaluated well both mechanically and visually. It is.

[0005]

[Means for Solving the Problems] According to the present invention, the mark for each ink consists of a visually readable part and a mechanically readable part, and the mark for each ink is visually readable. The sections consist of similar intersecting line segments, and the mechanically readable section for each ink to be printed consists of a straight section and a curved section, in which case the mechanically readable section for each printing ink consists of a straight section and a curved section. The geometrical positions of the possible parts are defined differently, so that when the registration is accurate, the visually readable parts overlap one another and the mechanically readable parts overlap one another. It is configured and resolved to be printed on the printing substrate at separate predetermined locations. Further embodiments according to the invention are specified in the dependent claims.

[0006]

Embodiments Next, embodiments of the present invention will be described in detail with reference to the drawings.

[0007] In FIG. 1, a, b, c, and d represent marks 1, 2, 3, and 4 for each ink according to the present invention, respectively. Each mark 1 to 4 is advantageously marked on a printing plate (e.g. FIG. 1d
is copied onto an offset printing plate (as shown at 20). The markings 1 to 4 according to the invention each consist of visually readable parts 5, 6 which are constructed in the same way in the form of intersecting lines and are preferably shown in the form of a cross with bars of the same length. Children are born as shown in 1a-d. Furthermore, the marks 1 to 4 according to the invention have mechanically readable portions 7, 8, which mechanically readable portions 7, 8 consist of a straight section 7 and a curved section 8. ing. Advantageously, by means of a linear section 7, a to d of FIG.
As shown in the figure, the vertical and horizontal lines 5, 6 of the visually readable part are connected as far as possible at their outer ends. The curvilinear section advantageously has a circular shape 8;
Furthermore, it is preferably arranged outside the linear section 7.

According to the invention, for all printing inks a similar visually readable part is used in each case at the same position or is copied onto each printing plate. Preferably similar parts 7, 8 are also used for the mechanically readable parts. However, their spatial position for each ink is set differently. In the advantageous embodiment according to FIGS. 1 and 2, the mechanically readable parts 7, 8 are located in the first quadrant according to FIG. 1a for the first ink and furthermore for the second ink. The third ink is located in the second quadrant, the third ink is located in the third quadrant, and the fourth ink is located in the fourth quadrant, as shown in b to d in FIG. 1, respectively. .

Marks 1 to 4 according to the invention are printed on the printing material support (22 in FIG. 1) by means of the various printing plates 20, which are shown simply in d in FIG. In printing, a composition as shown in Figure 2 occurs,
All inventive marks 1-4 are printed approximately on top of each other. The use of intersecting straight lines (advantageously in the form of a regular cross) allows a good visual readout or judgment of register, while the possibility of a mechanical readout, which is used in combination with the visually readable parts 5, 6. The parts 7, 8 allow good mechanical detection and evaluation.

As already mentioned, the mechanically readable part 7
. It is also possible to use 15, 19 and linear sections 16, 18. The curved section and the straight section can be connected to each other. The printing marks 14, 17 are thereby set, for example, in the shape of the number 2 or 5. 3 and 4, on the other hand the visually readable portion 5 for each ink,
6 occupy the same position, so that in error-free registration they would be located one above the other. For the mechanically readable parts 15, 16 to 18, 19, different circumferential or rotational positions are set for each ink. One mark can be completely covered since there is no displacement of the marks in any way. As a result, even partially covered markings on the device can be reproduced.

According to FIG. 4, a mark of the invention, for example 17
is preferably detected from the printing material support 22 by a video camera 21 and evaluated in an electronic evaluation device 22. Based on the evaluation, a corresponding follow-up control (register control) is preferably carried out, or the detected values are stored or displayed. The height and width of the printed marks 1-4 to 14-17 according to the invention (particularly for in-line measurements) is in each case between 3 mm and 8 mm. straight lines and curves 5, 6,
The thickness of 7, 8 is between 0.05 mm and 0.15 mm, and the diameter of the curved section, for example the diameter of circle 8, is between 0.3 mm and 0.8 mm. If four or more colors are to be printed, and therefore four or more printing marks are used, then instead of a 90 degree offset from color to color as described above, a 45 degree offset is required. It can be done. Thereby, instead of up to 4 different mechanically readable parts with a 90° offset, up to 8 different mechanically readable parts with a 45° offset. may be reproduced on a printed printing plate.

0012

As described above, the mark according to the present invention enables high-speed optical reading of register and reliable mechanical detection and evaluation in multicolor printing.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing marks for four inks according to the present invention.

2 shows a diagram in which the mark according to FIG. 1 is printed without register errors on a printing substrate; FIG.

FIG. 3 shows a second embodiment of a mark according to the invention.

FIG. 4: A third embodiment of a mark according to the invention with a detection device.

[Explanation of symbols]

1, 2, 3, 4 Mark, 5, 6 Visually readable part, 7, 8 Mechanically readable part, 14, 1
7 Printing mark, 15, 19 Curvilinear division, 16,
18 linear section, 20 printing plate, 21 video camera, 22 electronic evaluation device, 23 printing substrate support

Claims (9)

[Claims] Claim 1: In a registration mark formed of a geometric shape and printed on a printing medium in multicolor printing, the marks (1 to 4; 14; 17) for each ink are:
It consists of a visually readable part (5, 6) and a mechanically readable part (7, 8), and the visually readable part (5, 6) for each ink is the same one that intersects. The mechanically readable part (7, 8) for each printing ink consists of a straight line segment and a curved segment, in which case the mechanically readable part (7, 8) for each printing ink consists of a straight section and a curved section. The geometrical positions of the parts (7, 8, FIGS. 1a-d) are defined differently, so that when the registration is accurate, the visually readable parts (5, 6) are one above the other. The mechanically readable parts (7, 8; 18, 19) are located at predetermined positions distinct from each other,
A mark for registration printed on a printing material, characterized in that it is printed on a printing material (2). 2. Marks (1-4,
The straight lines (5, 6) of the visually readable part of FIG. 1) are connected to each other, and the curved sections are located outside the straight sections (7, FIGS. 1, 2). A mark for registration printed on the printing material described in 1. 3. The curvilinear section (8) of the mechanically readable part (7, 8) of the mark (1-4, FIGS. 1, 2) is separated from the rectilinear section (7) by a circle ( 8) The registration mark printed on the printing material according to claim 1 or 2, which is formed as: 4. The visually readable portions (5, 6, FIG. 3) for each ink have a cross-shaped shape, and the mechanically readable portions (15, 16, FIG. 3) have a cross shape. 2. A registration mark printed on a printing substrate according to claim 1, comprising a curved section (15) and a straight section (16). 5. The mechanically readable portion (15, 16) for each ink to be printed has the shape of 2, in which case the mechanically readable portion (15, 16) for each ink to be printed has a 5. The mark for registration printed on a printing medium according to claim 4, wherein the circumferential positions of the portions (15, 16, FIG. 3) are different. 6. The mechanically readable portions (18, 19, FIG. 4) for each ink to be printed have the shape of 5, in which case the mechanically readable portions (18, 19, FIG. 4) for each ink are 5. A registration mark printed on a printing material according to claim 4, wherein the parts (18, 19, FIG. 4) are arranged at different circumferential positions (rotational positions). [Claim 7] Marks (1 to 4; 14; 17) are 3
It has a height and width from mm to 8 mm, with straight and curved sections (5, 6; 7, 8, 15, 16, 17, 18)
The thickness of the curved sections (8, 15, 19) is formed between 0.05 mm and 0.15 mm, and the diameter of the curved sections (8, 15, 19) is 0.3 mm.
Any one of claims 1 to 6 formed between 0.8 mm and 0.8 mm.
A mark for registration printed on the printed material described. [Claim 8] The mark (17) is a video camera (2
1) and evaluated in an evaluation electronic device connected to the video camera (21). marks for registration. Claim 9: Marks to be printed for each ink (
4, Figure 1) is reproduced on the printing plate (20) Claim 1
A mark for registration printed on the printing material according to any one of 8 to 8.