JP3025264B1 - Sheet-fed printing plate with multi-colored cover - Google Patents

Abstract

Abstract: [PROBLEMS] When preparing a printing plate in which a plurality of patterns are arranged in a multi-stage form for multi-color sheet-fed printing, it is possible to eliminate wasteful provision of a color bar up to a gap between the patterns arranged in a patch shape. Efficient printing plate production is possible, and even when color bars are provided intermittently, the required density measurement can be performed even when color bars are used. Make a sheet-fed printing plate equipped. [Constitution] A sheet-fed printing plate provided with a color bar corresponding to multi-imposition according to the present invention has four patterns on the lower stage, and four unit bodies each having a pattern and a color bar patch block on the upper stage. The unit is arranged such that a picture is arranged on a film and a patch block is arranged above the picture and printed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-fed printing plate used in a multi-color sheet-fed printing press, and more particularly to a sheet-fed printing plate provided with a color bar for multi-face imposition.

[0002]

2. Description of the Related Art Conventionally, to adjust the color tone of a multi-color printed matter, the ink density of each color of the printed matter is detected via a density measuring unit, and the ink key of each ink fountain of a color-specific printing machine is controlled by an ink remote control desk. I am making adjustments.

[0003] The color tone management system for adjusting the density comprises a color tone central management unit 60 for measuring the density of a printed matter, a remote control desk 61 and a printing machine 62 as shown in FIG.
The color tone measurement management unit 60b controls the color tone of the printing surface of the color bar of the main press by using a set of color-specific elements having the same width as the ink key formed on the printing surface of the color bar by the spectral sensor 60a running on the color bar. The density of each color is read in the same width unit as 62a, the deviation value is calculated by comparing the density with the preset data, and the printing for each color is performed via the color tone management terminal 61a of the remote control desk 61 and the ink controller 61b. The opening degree of the ink key corresponding to each ink fountain provided in each of the printers 62 is adjusted, and the ink pumping amount of each ink fountain ink source roller is adjusted for each ink key width to control and adjust the color tone of the printed matter.

As shown in FIG. 6, a multicolor printing part having a color bar printing surface is conventionally formed on a film 51 on which a printing plate is first formed, especially in sheet-fed multicolor printing. One band-shaped color bar 50 on the upper side in the vertical direction
Is printed over substantially the entire width of the film 51, and thereafter, a plurality of pictures 11 are arranged and printed in a multi-stage manner on the lower side to form a multi-face sheet-type printing plate.

[0005]

The arrangement and printing of the pattern 11 below the band-shaped color bar 50 is carried out by detecting the density of the color bar 50 corresponding to the left and right positions of the pattern 11 and printing the corresponding ink key 62a. In order to adjust the opening degree and control the ink supply amount, it is necessary to define the arrangement of the color bars 50 so that the positional relationship between the ink keys 62a and the color bars 50 corresponds. It requires time and effort to input positional data. That is, conventionally, it is necessary to treat the color bar 50 and the pattern 11 separately, first print the color bar 50 on the film 51, and then align the pattern 11 with the printed color bar 50 and print. Since the above-described positioning involves complicated and difficult operations, it is strongly desired to introduce a method that does not require such positioning. In addition, when the same pattern is to be multi-faced by a stencil printing machine, there is a problem that an additional work process for burning a color bar is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a printing plate in which a plurality of patterns are arranged in a multi-stage manner for multi-color sheet printing. In addition, the sheet-fed type equipped with a multi-imposition color bar that can measure the required density even if a color bar is provided intermittently during use and can determine and control the position of the ink key corresponding to the discontinuous color bar It is intended to provide a printing plate.

[0007]

SUMMARY OF THE INVENTION A sheet-fed printing plate having a color bar for multi-imposition printing according to the present invention is used in a multi-color sheet-fed printing press, and is a sheet-fed printing plate having a pattern arranged in a multi-faced manner. In the printing plate, a plurality of printing plate units for arranging each pattern in a patch shape on the printing plate are formed by extending a color bar in a band shape above the pattern without protruding from the left and right of the pattern. The unit body is arranged on multiple sides such that when the unit bodies are arranged on the printing plate in a multi-faceted manner, at least the color bar of the unit body arranged on the upper side of the printing plate appears.

According to the first aspect of the present invention, a pattern arranged on a sheet-type printing plate of a multicolor printing press in a multi-faced manner, and a strip-shaped pattern is provided above each of the patterns so as not to protrude from the left and right ends of the pattern. Since the color bar and the color bar are integrally formed as a unit body, when a sheet-fed printing plate is manufactured, the unit body is disposed on the plate film and a predetermined position is set without complicated position adjustment. You can bake it. Each unit is provided with a color bar of a predetermined length having the same pattern at a position of a predetermined interval set in advance from a pattern end portion above the pattern, so that the positional relationship between the pattern and the color bar is provided. Has been established.

For this reason, simply by arranging the plurality of units at a predetermined interval on a film and printing the film, a corresponding ink key can be applied to each color bar of the unit on a sheet-fed printing plate. Is established, and the print density of the picture can be adjusted by the corresponding ink key via the color bar. That is, when measuring the ink density of a printed material using a sheet-fed printing plate provided with a multi-imposition-compatible color bar of the present invention, the scanning spectral sensor for detecting the density is located at a predetermined position from the end for each picture passing therethrough. Since the head position of a color bar having the same pattern is detected and the density of each color is detected from the position by a set of color elements of the same pattern, ink keys having a positional relationship corresponding to the head position can be controlled.

Further, since each pattern and the color bar are integrally formed as described above, when the same pattern is multi-faced by a stencil printing machine, the color bar can be printed simultaneously with the pattern. The work process of baking can be omitted.

It is preferable that the margin distance between the color bars of the adjacent units on the left and right is at least a readable length of a photoelectric sensor that scans the color bars and detects the density.

With this configuration, when detecting the ink density of a printed material of a sheet-fed printing plate provided with a color bar corresponding to multiple imposition according to the present invention, the spectral density of the color bar cut off for each picture of the printed material is measured by a spectral sensor. , And the ink key corresponding to each picture is adjusted from the head position at the start of reading of the color bar, so that the readable margin length corresponding to the scanning speed of the photoelectric sensor is set. Is provided.

The color bar provided on the unit body may be
It is characterized by comprising a patch block in which a plurality of patch patterns of 7 patches for 4 and 5 colors or 7 patches for 6 colors are provided in series, and the total length of each patch pattern corresponds to approximately one ink key length.

According to the present invention, the patch block of the color bar of the unit body is constituted by connecting a plurality of patch patterns each composed of seven patches for detecting four or five colors or seven patches for detecting six colors. The entire length of the patch pattern corresponds to the width of one ink key, and the length of the patch block does not protrude from the left and right ends of the pattern as described in the first aspect of the present invention. . Therefore, for example, since the number of patch patterns forming a patch block corresponding to a certain pattern width is made to correspond to an integer value of a quotient divided by an ink key width, it corresponds to a quotient of a pattern, and thus corresponds to each part of the pattern. The plurality of patch patterns can correspond to all of the ink keys for supplying the ink, and the required density can be adjusted.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not merely intended to limit the scope of the present invention, but are merely illustrative examples unless otherwise specified. Absent. Note that the same reference numerals are used for components having the same functions as in the conventional example.

FIG. 1A is a diagram showing the configuration of a sheet-fed printing plate having a color bar corresponding to the multi-imposition according to the present invention, and FIG. 1B is a diagram showing the configuration of a unit forming the component (A). (C) is a diagram showing the configuration of the color bar of (B). FIG. 2 shows FIG.
FIG. 3 is a view showing an arrangement state of patch blocks provided on the unit body when the unit body is disposed on the printing plate film.
FIG. 4 is a diagram showing the relationship between the ink keys corresponding to the sheet-fed printing plate shown in FIG. 4, and FIG. 4 is a diagram showing a configuration of a patch pattern forming a patch block provided in the unit body of FIG. (B) is a patch pattern for six colors.

FIG. 1 shows a schematic configuration of a sheet-fed printing plate provided with a color bar corresponding to multiple imposition according to the present invention and a configuration of a unit body. (A) of the figure shows a configuration in which eight patterns are arranged in two steps, and the sheet-fed printing plate 13 has four patterns 11 in the lower part.
Four unit bodies 12 each having a picture pattern 11 and a color bar patch block 10 are provided on the upper stage. The unit body 12 is, as shown in FIG.
The pattern 11 is arranged on the upper side a and the patch block 10 is arranged above the pattern 11 and printed. Further, the patch block 10 has a configuration in which a plurality of patch patterns 10a composed of seven color-specific elements, which will be described later, are continuously provided as shown in FIG. It does not protrude from the left and right ends. The length of the patch pattern 10a is set to be the width of one ink key 15 described later. Then, the single-wafer type printing plate 13 prints the unit body 12 on the film 11a in four steps and two steps, and at that time, the patch block 10 is formed only on the upper printing step.
As a result of the above-described printing, a unit body 12 having a patch block 10 is arranged in the upper stage, and only a picture 11 is arranged in the lower stage, as shown in FIG. Is obtained.

In the above arrangement, a plurality of patch block color bars 10 are formed in such a manner that patch patterns 10a are continuously provided corresponding to the picture 11, and the total length of the patch pattern 10a does not protrude from the left and right ends of the picture. If prepared, the patch block 10 is arranged so as to be located substantially at the center of the pattern 11 and is baked together with the pattern 11 on the film 11a to form the unit body 12 in advance. In the case of multiple imposition, since the pattern 11 and the color bar 50 having a predetermined positional relationship can be simultaneously burned, a complicated adjustment operation for adjusting and matching the positional relationship between the pattern and the color bar can be omitted.

FIG. 2 shows the arrangement of the patch blocks provided on the unit when the unit shown in FIG. 1 is disposed on the printing plate film. As seen in the figure, pattern by the distance S ₂ is at least during the concentration measurement, reads read signal the start position of the spectroscopic sensor patch block 10 between the margin S1 and the paper edge and the patch block 10 of the patch block 10 adjacent It is necessary to set the ink key corresponding to
In order to perform the reading reliably, the distance is set to about 5 mm or more. In addition, the vertical shift S ₃ of the adjacent patch block 10 is also set to be equal to or less than half of the vertical width of the patch in order to ensure the reading of the spectral sensor.

FIG. 3 is a diagram showing the positions of the sheet-fed printing plate shown in FIG. 1 in relation to the ink keys. As shown in the drawing, the sheet-fed printing plate 13 of FIG. 1 is such that the ends of the left and right patterns are located inside the ink fountain having the ink keys 15 of width W by three ink keys W × 3 inside the two ends. It is. The color bar patch blocks 10 provided above the pattern 11 are provided with the ink keys 15 as described above.
In this configuration, n patch patterns 10 a having a length corresponding to the width w of the pattern 11 are continuously provided so as not to protrude from the pattern 11. Therefore, each patch block 10 is located at the center of the picture at a position shifted to the right by W × n from the head position A, so that each patch block corresponds to an ink key group corresponding to each picture. be able to.

FIG. 4 is a diagram showing the configuration of a patch pattern forming a patch block provided in the unit body of FIG.
(A) is a patch pattern for four or five colors, and (B) is a patch pattern for six colors. Each of them starts with cyan C, then black BK, then yellow Y, and magenta M at the last end. In FIG. 7A, gray G, which shows the three colors, and paper P and color the duplication of the patch pattern 10a is formed by 7 patch appropriated patch consisting of special patch Sp ₁ showing a special patch Sp ₂ in the middle in the Figure (B), the paper P, patches Sp ₁
Patch pattern 1 consisting of 7 patches
0a is formed, and the length of each patch pattern corresponds to the width of one ink key.

With the above configuration, the density measurement and control of the printing paper printed by the sheet-fed printing plate provided with the multi-imposition color bar shown in FIG. 1 are performed through the color tone management system shown in FIG. That is, the color tone measurement management unit 60b converts the color tone of the color bar printing surface of the printing press into a set of color-specific elements having the same width as the ink keys formed on the color bar printing surface by the spectral sensor 60a running on the color bar. , The density of each color is read in the same width unit as the ink key, and the deviation value is calculated by comparing the density with the preset data.
b, the ink key corresponding to each ink fountain provided in each printing machine 62 for each color is adjusted, and the amount of ink pumped up by the ink source roller of each ink fountain is adjusted for each ink key width. When reading the color bar of the spectroscopic sensor 60a, the spectroscopic sensor 6 that scans while traveling is used.
The head position of the patch block 10 provided for each picture is detected by 0a, the position of the corresponding ink key is detected and calculated, and the ink density can be controlled by each ink key.

[0023]

According to the above configuration, when the same pattern is to be multi-faced by a stencil printing machine, if a color bar is attached and an imposition film including the integrated pattern is prepared in advance, the color bar and the color bar are simultaneously formed. Since the burning can be performed, the operation can be simplified. Even if a discontinuous color bar is used, the density of the printed matter can be measured reliably, and the corresponding ink key can be easily determined and automatic control can be performed.

[Brief description of the drawings]

FIG. 1A is a diagram showing a configuration of a sheet-fed printing plate provided with a multi-imposition color bar according to the present invention, and FIG. 1B is a diagram showing a configuration of a unit body forming (A); (C) is a diagram showing the configuration of the color bar of (B).

FIG. 2 is a view showing the arrangement of patch blocks provided in a unit when the printing plate of FIG. 1 is provided on a printing plate film.

FIG. 3 is a diagram showing a relative position with an ink key corresponding to the sheet-fed printing plate shown in FIG. 1;

4A and 4B are diagrams showing a configuration of a patch pattern forming a patch block provided in the unit body of FIG.
(B) is a patch pattern for six colors.

FIG. 5 is a diagram illustrating a schematic configuration of a color tone management system for a printed material.

FIG. 6 is a diagram illustrating a configuration of a sheet-fed printing plate in a conventional multicolor printing press.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Patch block 10a Patch pattern 11 Picture 12 Unit 13 Film 15 Ink key

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B41F 31/02 G03F 1/00-1/06 H04N 1/40

Claims (3)

(57) [Claims] 1. A sheet-fed printing plate for use in a multicolor sheet-fed printing press, in which pictures are arranged in a multi-faceted manner, wherein a plurality of printing plates are arranged on the printing plate in the form of patches. The unit is a unit formed by extending a color bar without protruding from the left and right of the pattern in a band shape at a position above the pattern and the pattern, and at least when the unit is arranged on a printing plate in a multi-faceted manner. A sheet-fed printing plate provided with a color bar corresponding to multiple impositions, wherein the color bars of the unit body arranged on the upper side of the printing plate are arranged on multiple sides so as to appear. 2. The system according to claim 1, wherein a margin distance between the color bars of the unit bodies adjacent to the right and left is at least a readable length of a photoelectric sensor that scans the color bars and detects density. A sheet-fed printing plate equipped with the described multi-imposition color bar. 3. The color bar of the unit includes a patch block in which a plurality of patch patterns of seven patches for four and five colors or seven patches for six colors are connected in series, and the total length of each patch pattern is approximately one. 2. A sheet-fed printing plate provided with a color bar corresponding to multiple imposition according to claim 1, wherein the printing plate is adapted to a length of an ink key.