JPH07164724A - Registering method - Google Patents

Abstract

PURPOSE:To obtain a registering method for identifying a misregistration between printing plates without reducing a line width of a register mark in the application to plate making/printing processes of a high-accuracy printing. CONSTITUTION:On one of printing plates, a first fine line group A is formed by arranging a plurality of fine lines at a predetermined pitch in parallel to each other. On another printing plate, a second fine line group B is formed by arranging a plurality of fine lines in parallel to each other at a pitch different from that of the first fine line group A. When fine lines at specifies positions of the first fine line group A and the second fine line group B coincide with each other in the overlapped state of the printing plates, the printing plates are registered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a registering method using a register mark which is applied to a sticking operation in a plate making / printing process and a registering of each printing plate.

[0002]

2. Description of the Related Art In recent years, high-fidelity, high-quality color photographic prints with color separation and plate making with a screen ruling of 400 to 800 (lines / inch) are on the market. Used for required photo collections, catalogs, posters, etc. (High-definition printing: Hyper Prin
t).

Such color photographic prints have advantages such as good quality, that is, wide density range, gloss (gloss), high resolution, and ink saving.

However, in such high quality color photographic prints, especially multicolor printing, it is difficult to register the register which is a particularly important factor in the process. In such a situation, in the case of printing with a normal screen ruling of 175 to 200 (lines / inch), a register mark as shown in FIG.
Alternatively, a linear pattern referred to as a register mark "+", which serves as a registration / attack, is used, and the printing positions are aligned so that the lines of the register marks are overprinted (not shifted).

The line width of such a register mark is usually formed to about 100 μm, and in a general printed matter (screen line number 175 to 200), for example, 50 μm or less (so that the register mark lines overlap each other to some extent. If it overlaps half the line width of the dragonfly mark), it means that the registration is correct.

[0006]

However, in the case of a high-definition color photographic print, even if the registration marks are used and the registration marks are aligned so that the registration mark lines are overlapped with each other, the registration is actually correct. Sometimes I don't know, and the picture is out of focus.

For this reason, the actual situation is to judge whether or not the registration is correct by looking at the printed matter. In addition, recent color prints have 7-color printing with good color reproducibility, that is, Y
There are printings in which R (red), G (green), and B (blue) are added to (yellow), M (magenta), C (cyan), and K (sumi). In such color printing, Since the version number is 7 or more, in the above register mark,
It is difficult to judge the deviation because the 7 colors overlap.

Further, it is conceivable to reduce the line width of the register mark in accordance with the color photographic print having a finer pattern resolution, but this is practically difficult. That is, if the line width of the register mark is narrowed, the line and the degree of overlap cannot be seen with the naked eye, and in the case of offset printing, it is difficult to print (reproduce) due to the influence of dampening water.

Therefore, the present invention provides a register registration method which can be applied to the plate making / printing process of high-definition printing to confirm the misalignment of each printing plate without making the line width of the register mark small, and to perform registering. The purpose is to do.

[0010]

According to a first aspect of the present invention, there is provided a method for registering at least one printing plate in a plate making / printing step by using a register mark. A first thin line group in which a plurality of thin lines are arranged in parallel with each other at a predetermined pitch is formed on one plate, and a plurality of thin lines are arranged in parallel with each other on each printing plate at a pitch different from the pitch of the first thin line group. Forming a second group of fine lines,
When the printing plates are superposed on each other, the registering method is a registering method in which when the thin lines of the first thin line group and the second thin line group are aligned with each other, the thin lines at predetermined positions are aligned with each other.

According to the second aspect, when the printing plates are overlapped with each other, the positional deviation of the printing plates is determined by the positions of the thin lines which are the same among the thin lines of the first thin line group and the second thin line group. To do. According to claim 3, in the registering method for registering each printing plate at least in the plate making / printing process by using the register marks, each printing plate is formed with a triangle, and one side of these triangles is virtual. When forming each incision pattern that forms the incision for forming the triangle, and when printing each printing plate is overlapped, form a square that combines each triangle, and each incision pattern has a space for each side of this rectangle. On the other hand, it is assumed that the registration is correct when each virtual triangle is formed by each side of the polygon and each cut of each cut pattern.

According to the fourth aspect, the cut pattern has a plurality of arcs of different colors arranged on the concentric circles. According to claim 5, in the registering method for registering each printing plate at least in the plate making / printing process by using the register marks, a plurality of radiations of different colors are formed on each printing plate at a predetermined pitch. And, when one of the printing plates is formed with a broken line circle in which line segments are arranged in the respective gaps on the virtual circumference of each radiation, and when the respective printing plates are superposed, the gaps between the radiations are It is assumed that the line segments of the dashed circle are aligned when they are arranged.

[0013]

【Example】

(1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a register mark to which a register alignment method is applied. The register mark is formed by adding a thin line group in which a plurality of thin lines are arranged in parallel to each other at a predetermined pitch to a cross or a T-shape formed at a center position such as a block copy.

That is, one of the printing plates is
A thin wire group A is formed. The thin wire group A is formed by arranging a plurality of thin wires n in parallel at a predetermined pitch. A thin line group B is formed on the remaining plates of the printing plates. This thin wire group B is a plurality of thin wires (n-1) arranged in parallel with each other at a pitch different from the pitch of the thin wire group A, and the lengths of these thin wires in the arrangement direction are both thin wire groups A and B. They are formed the same.

The registration using the register marks having such a construction is such that, when printing plates are superposed, a fine line at a predetermined position among the fine lines of the fine line group A and the fine line group B, for example, the first fine line a1. , B1 are in agreement when they match each other.

Next, a specific embodiment applied to a sumi plate, which uses the register mark as a reference plate as a printing plate, and a cyan plate, a magenta plate, and a yellow plate will be described. It should be noted that this register mark is also an example applied to a cross or T-shape formed at the center position such as a block copy.

FIG. 2 is a schematic diagram of a cross-shaped register mark formed on a stencil plate. This Sumi version has three groups of fine lines K
1 to K3 are formed in the same direction. These fine wire group K
1 to K3 are formed by forming a plurality of n thin lines in parallel with each other at a predetermined pitch. The width of these thin lines is 100 μm.

FIG. 3 is a schematic view of a cross-shaped register mark formed on the cyan plate. In this cyan plate, the fine line group C is provided at a position corresponding to the formation position of the fine line group K1 in the sumi plate.
1 and C2 are formed. These fine wire groups C1, C2
Is a plurality of thin wires (n-1) formed in parallel with each other at a pitch different from the pitch of the thin wire group K1.

The fine wire groups C1 and C2 are formed in parallel with each other, and the distance D between them is the same as the length of each fine wire of the fine wire group K1. The width of these thin lines is 100 μm.

FIG. 4 is a schematic diagram of a cross-shaped register mark formed on a magenta plate. In this magenta plate, fine line groups M1 and M2 are formed at positions corresponding to the formation positions of the fine line group K2 on the sumi plate. These fine wire groups M1 and M2
Is a plurality of thin wires (n-1) formed in parallel with each other at a pitch different from the pitch of the thin wire group K2.

The fine wire groups M1 and M2 are formed in parallel with each other, and the interval D is formed to be the same as the length of each fine wire of the fine wire group K2. The width of these thin lines is 100 μm as in the above case.

FIG. 5 is a schematic view of a cross-shaped register mark formed on the yellow plate. In this yellow plate, the thin line group Y is provided at a position corresponding to the formation position of the thin line group K3 in the sumi version.
1 and Y2 are formed. These fine wire groups Y1 and Y2
Is a plurality of thin wires (n-1) formed in parallel with each other at a pitch different from the pitch of the thin wire group K3.

The fine wire groups Y1 and Y2 are formed in parallel with each other, and the interval D is formed to be the same as the length of each fine wire of the fine wire group K3. The width of these thin lines is 100 μm as in the above case.

Registration using the register mark will be described below. For example, when the cyan plate is overlaid on the sumi plate, as shown in FIG.
With respect to 1, the cyan plate thin line groups C1 and C2 are positioned on both sides of and overlap with each other.

If the first thin line of the thin line group K1 is matched with the first thin line of each of the cyan plate thin line groups C1 and C2, it is assumed that the registration is correct. Since the thin lines of the second line are the same, the misalignment between the smi plate and the cyan plate can be obtained as follows.

That is, it is determined that the cyan version is lower than the sumi version by {1 / (n-1)}-(1 / n) = 1 / n (n-1) (1). .

Specifically, for example, the thin line group K1 of the sumi version is set to 2
When the fine line groups of 0 (lines / 4 mm), cyan plate, magenta plate and yellow plate are formed as 19 (lines / 4 mm) respectively,
In this case, if the m-th thin line from the bottom coincides with each other, it means that m {(4/19)-(4/20)} = m / 95 (mm) (2).

Therefore, when registering the printing plates by superimposing them on each other, the misalignment of the printing plates can be obtained by checking the number of the matching thin lines in the thin line group. Also, by checking the misalignment of each thin line group when the printing plates are superimposed,
The direction of misalignment between printing plates can be known.

As described above, in the first embodiment,
Fine line groups K1 to K3 are formed on the sumi plate, and fine line groups C1, C2, ... Y2 having different pitches from the pitches of the respective fine line groups K1 to K3 are formed on the other cyan plates, magenta plates and yellow plates. In the case of overlapping, the fine line groups K1 to K3 and the fine line groups C1 and C2, for example, are considered to be in register when the first fine lines of the fine lines match each other. Even if it is not applied, it can be applied to the plate making / printing process of high-definition printing and the misalignment of each printing plate can be confirmed and registered.

In addition, by confirming the number of the matching thin line of the fine line group, the amount of deviation of each printing plate can be obtained, and the direction of the deviation can be known. In addition, in the above-mentioned embodiment, the case of applying to the plate of four colors has been described, but in addition to this, it is also possible to apply to a plate of seven colors obtained by adding red, green and blue to the above four colors. (2) Next, a second embodiment of the present invention will be described.

FIG. 7 is a constitutional view of a mark applied in place of the cross or T-shape formed at the center position of each printing plate. Triangular mark 1 for cyan plate
An arc mark 11 having 0 and a notch is formed.

Similarly, the magenta plate has a triangular mark 12,
And an arc mark 13 having a notch is formed,
On the yellow plate, triangular marks 14 and arc marks 15 with cuts are formed.

Further, the red plate is provided with the triangular mark 16 and the arcuate mark 17 with the cut, and the green plate is similarly provided with the triangular mark 18 and the arcuate mark 19 with the notch, and the blue mark is formed. The plate has a triangular mark 20 and an arc mark 2 with a cut.
1 is formed.

Each triangular mark 10, 12, ... 20
Is formed in a direction in which one apex coincides with each other when printing plates are stacked. Also, each arc mark 1
When the printing plates are overlaid, the reference numerals 1, 13, ... 21 face one side of the triangular mark 16 when the openings of the respective cuts face each other, for example, the arc mark 11, and the virtual triangle Q1. Are formed.

Next, registration using the mark will be described. When the printing plates are overlapped with each other, the vertices of the triangular marks 10, 12, ... 20 formed on the plates are aligned with each other, and the respective sides are adjacent to each other. As a result, the triangular marks 10, 12, ... 20 are combined to form a hexagon.

At the same time, each arc mark 11, 13, ... 2
1 is located so that the opening of each notch faces each side of the hexagon. As a result, a virtual triangle Q1 that is not drawn is formed by the notch of the arc mark 11 and one side of the triangle 16. Similarly, the cut of the arc mark 13 and one side of the triangle 18 form a virtual triangle Q1, and the cut of the arc mark 15 and one side of the triangle 20 form a virtual triangle Q3.

Therefore, whether each virtual triangle Q1, Q2, ... Is formed and each triangular mark 10, 12 ,.
By making sure that 0 is properly matched,
The registration can be determined, and each triangular mark 10, 12,
The direction of deviation is determined based on the degree of overlap of the 20 colors.

As described above, according to the second embodiment, when printing plates are superposed on each other, a hexagon is formed by each triangular mark, and each side of the hexagon is formed by a virtual cut pattern. Since the triangles are formed to perform the registration, the registration can be determined and the misalignment direction of each printing plate can be determined.

Each arc mark has a plurality of arcs 30 and 3 of different colors (for example, R, G, B) as shown in FIG.
You may form and arrange 1 and 32 on a concentric circle. By forming the circular arcs 30, 31, and 32 in this manner, the registration determination can be made clearer and clearer.

In the above-mentioned embodiment, the case where it is applied to a plate of 6 colors has been described, but in addition to this, 4 colors of cyan, magenta, yellow and sumi, and 3 colors of red, green and blue are combined. It can also be applied to 7-color plates. (3) Next, a third embodiment of the present invention will be described.

FIG. 9 is a diagram showing the configuration of marks arranged at four peripheral locations on each printing plate. A plurality of radiations 40a, 40b, ... Are formed in the same center at a predetermined pitch on the yellow plate among the printing plates. Further, a plurality of radiations 41a, 41b, ... Are formed in the same center at a predetermined pitch on the magenta plate. In addition, the cyan version has multiple rays 42
are formed in the same center with a predetermined pitch.

Similarly, a plurality of radiations 43a, 43b, ... Are formed in the same center at a predetermined pitch on the red plate among the printing plates, and a plurality of radiations 44 are formed on the green plate.
, are formed at the same center with a predetermined pitch, and a plurality of radiations 45a, 45b, ... Are formed at the same center with a predetermined pitch on the blue plate.

Therefore, when these yellow plate, magenta plate, cyan plate, red plate, green plate and blue plate are superposed, as shown in FIG. 9, each radiation 40a, 40b, ...
5b, ... Are radially arranged with a predetermined pitch with the same center.

On the other hand, the radiation 40a,
40b, ... 45b, ...
A dashed circle is formed so that 46b is arranged. Among them, the broken line circle composed of a plurality of line segments 46a indicates each radiation 4
45a is formed on the virtual inner circumference formed by 0a, 40b, ... 45b, and a broken line circle composed of a plurality of line segments 46b is formed on the virtual outer circumference.

Next, registration using the mark will be described. Print editions, that is, yellow edition, magenta edition,
... When the blue plate and the sumi plate are overlaid, the radiations 40a, 40b, ... 45 formed on the plates as shown in FIG.
b, ... Are radially arranged with the same center with a predetermined pitch.

Since the sumi version is overlaid with this,
.. 45b .. Radiations 40a, 40b, .. 45b, ... Are arranged on the virtual inner circumference, ie, broken line circles composed of the line segments 46a are arranged, and on the virtual outer circumference, broken line circles composed of the line segments 46b are arranged.

In this state, the radiations 40a, 40b, ...
45b, ... And the degree of registration of the dashed circles is used to determine the registration. For example, when the printing plates are stacked,
If the radiation shown in 0 and the overlapping degree of each broken line circle are determined, the yellow plate and the cyan plate are arranged in the correct positions, and it is determined that the magenta plate is displaced upward and the red plate is displaced rightward. .

As described above, in the third embodiment,
A plurality of radiations 40a, 4 of different colors are printed on each printing plate.
When 0b, ... 45b, ... Are formed at a predetermined pitch, and a broken line circle in which line segments are respectively arranged in each gap on the virtual circumference of each radiation is formed on the sumi plate, and the printing plates are superimposed. , When the line segments of the broken line circle are arranged in the gaps between the radiation lines, it is assumed that they are in register.
.., 45b, ... And the degree of overlap of the broken line circles, the registration can be determined, and if there is a shift, the plate and the direction of the shift can be determined.

In the above-described embodiment, the case of applying to a 6-color plate has been described, but in addition to this, 3 colors of red, green and blue, 4 colors of cyan, magenta, yellow and sumi,
Alternatively, it can be applied to a total of 7 colors.

The present invention is not limited to the above embodiments, and may be modified within the scope of the invention. For example, the mark of each of the above embodiments may be output by an automatic drafting machine at the same time as the register mark when outputting the register mark on the underlayment mount, and may be output at the same time as an edge around the pattern when outputting the disassembled version of the color scanner. Good. Further, the output device of the layout scanner may output at the same time as the plate making frame and the registration mark.

In addition, the register position alignment using the register marks is also performed when the disassembled plates are stuck to the respective color plates during plate making.
It can also be applied to registering the registration of each color plate on the printer.

[0052]

As described in detail above, according to the present invention, it is possible to make a plate for high-definition printing without reducing the line width of the register mark.
It is possible to provide a register alignment method that can be applied to a printing process to confirm the deviation of each printing plate and perform registering.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a register mark used in a register registration method according to the present invention.

FIG. 2 is a configuration diagram in which the register mark is applied to a sumi plate.

FIG. 3 is a configuration diagram in which the register mark is applied to a cyan plate.

FIG. 4 is a configuration diagram in which the same register mark is applied to a magenta plate.

FIG. 5 is a configuration diagram in which the same dragonfly mark is applied to a yellow version.

FIG. 6 is a view showing a registering action by the register mark.

FIG. 7 is a configuration diagram showing a second embodiment of the register mark used in the register alignment method according to the present invention.

FIG. 8 is a view showing a modified example of the register mark.

FIG. 9 is a configuration diagram showing a third embodiment of the register mark used in the register alignment method according to the present invention.

FIG. 10 is a diagram showing a registering action by the register mark.

FIG. 11 is a diagram showing a register mark formed on each printing plate.

[Explanation of symbols]

 K1 to K3 ... Fine line group, C1, C2 ... Fine line group, M1, M2 ... Fine line group, Y1, Y2 ... Fine line group, 10, 12, 14, 16, 18, 20, ... Triangle mark, 11, 13, 15, 17 , 19, 21 ... Arc mark, Q1 ... Virtual triangle, 40a, 40b, 41a, 41b ... Radiation, 42a, 42b, 43a, 43b ... Radiation, 44a, 44b, 45a, 45b ... Radiation, 46a, 46b ... Line segment .

Claims (5)

[Claims] 1. A register registration method for registering at least each printing plate in a plate making / printing process by using a register mark, wherein a plurality of thin lines are parallel to each other at a predetermined pitch on one of the printing plates. Forming a first group of fine lines arranged on each of the other printing plates, and forming a second group of fine lines in which a plurality of fine lines are arranged in parallel with each other on each printing plate at a pitch different from the pitch of the first group of fine lines. When the respective plates are superposed, it is considered that the registration is made when the thin lines at a predetermined position among the thin lines of the first thin line group and the second thin line group match each other. Method. 2. When the printing plates are overlaid, the first
2. The register registration method according to claim 1, wherein the misregistration of each of the printing plates is determined based on the position of a matching thin line among the thin lines of the thin line group and the second thin line group. 3. A register registration method for registering each printing plate at least in a plate making / printing step by using a register mark, wherein each printing plate is formed with a triangle, and one side of these triangles is virtual. Forming each incision pattern forming an incision for forming a triangle, when the printing plates are superposed, a square shape is formed by combining the triangles, and each incision pattern is formed on each side of the square shape. The register registration method is characterized in that when the virtual triangle is formed by each side of the polygon and each cut of the cut pattern, the register is aligned. 4. The registering method according to claim 3, wherein the cutting pattern has a plurality of arcs of different colors arranged on concentric circles. 5. A register registration method for registering each printing plate at least in a plate making / printing step by using a register mark, wherein a plurality of radiations of different colors are formed at a predetermined pitch on each printing plate, Moreover, when one of the printing plates is formed with a broken line circle in which line segments are arranged in respective gaps on the virtual circumference of the radiation, and when the printing plates are superposed, The registering method is characterized in that when the line segments of the broken line circle are arranged in the gap, the registration is matched.