JPH08461B2 - Image positioning method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention has the following steps when an image input from an image input unit is printed on a required printing paper via a printing plate. The present invention relates to an image positioning method for positioning an image on a printing paper.

<Prior Art> In the conventional printing process, when the printing plate is attached to the plate cylinder, the position of the printing plate is moved or the printing machine is adjusted so that the image is uniformly printed at a predetermined position on the printing paper. , A so-called registration process was required.

<Problems to be Solved by the Invention> Recently, there has been a rapid increase in the demand for printing a business form that continuously prints images of the same pattern on a long length of printing paper. Even if the positional deviation is minute, the positional error is accumulated, so that a large positional deviation eventually occurs. Such misalignment causes printing defects due to, for example, inconsistency in the relationship between the image and the perforation for cutting that is punched later. Therefore, extremely high accuracy has been required for the registration. However, this registration relies on cross-shaped register slips (marks),
Since the adjustment is based on the visual sense, there are drawbacks that it is troublesome and error is likely to occur, and readjustment of several times is required.

Further, in the conventional image output device such as the image scanner, there is no structure for designating the image exposure position on the film. For this reason, even if the plate can be positioned at the same position for each film, the image cannot be set in relation to the printing plate, and thus the positioning is dependent on the feeling. Therefore, it was not possible to accurately set the image on the printing plate.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned conventional defects and provide a combined image positioning method capable of setting an output image in an arbitrary direction.

<Means for Solving Problems> According to the present invention, when an image input from the image input means is printed on a required printing paper through a printing plate, the printing paper is provided with the following steps. An image positioning method for positioning an image.

Step I A keyboard switch is used to specify the orientation of the image with respect to the film, and the vertical and horizontal spacing from the reference first register pin of the plurality of first register pins to the origin of the image.
Enter x and y to specify the image exposure position on the film.

Step II After holding the position of the film by inserting the first register pin into the positioning hole, on the film, the image input from the image inputting means by the image photosensitive device, with the reference first Lesbian star pin as the reference position, In step I, exposure is performed based on the direction of the image designated by the keyboard switch and the image exposure position to form a developing film.

Step III superimpose the development film and the film plate material,
An intermediate register pin whose positional relationship with the image is the same as that of the first register pin is inserted into the positioning holes formed in each to align the two, and then the image is transferred to form a printing plate from the film plate material. .

Step IV The positional relationship with respect to the image is the same as each first register pin, a plurality of second register pins arranged at predetermined positions of the plate cylinder of the printing machine are inserted into the positioning holes of the printing plate, Fix the position.

Here, in the case of using a film made of a film plate material which itself serves as a printing plate, after the first register pin is inserted into the positioning hole and held in position, an image input device is provided on the film by an image photosensitive device. The image input from is exposed on the basis of the reference first register pin as a reference position based on the image orientation and the image exposure position designated by the keyboard switch in step I to form a printing plate from the film (II / III), and step IV is executed after this.

<Operation> First, an image is input by an image input device such as an image reading device or a key switch input device using a CRT screen. Such input data is passed to the image photosensitive device.

The keyboard switch is then used to orient the output image and set the image exposure position on the film. This setting is the distance x from the reference position to the origin of the image,
This is done by numerically inputting y or selecting a pattern in which the intervals x, y, etc. from the reference position are preset. (Step I) In the image-sensing device, the first register pin is inserted into the positioning hole of the film to hold its position. The positioning hole may be formed by inserting a register pin as a piercing tool and inserting the locating hole. The film positioned by the register pin,
The image input from the image inputting means by the image-sensing device is exposed at the position designated by the keyboard switch.
Therefore, the position of the image is specified with respect to the positioning hole (first register pin) of the film. (Step II) An image is transferred from the film thus developed to a film plate material, and a printing plate is made from the film plate material.
In this case, a positioning hole having the same specifications as the positioning hole of the film is formed in the film plate material, the positioning holes are aligned with each other, and the intermediate register pin is inserted to align them. (Step III) Recently, a film plate material (for example, Mitsubishi Silver Master (trademark)) which is used as a printing plate by the film itself has been developed in order to cope with various kinds of small amount printing. Therefore, when such a film plate material is used, the alignment step is not required. (Step II / III) In the printing plate manufactured in the above process, the second register pin formed on the plate cylinder, which has the same positional relationship with the image as the first register pin, is inserted into the positioning hole and positioned. Is applied. (Step IV) Thus, in the steps from the image exposure step of the film to the step of mounting the printing plate on the plate cylinder, the respective register pins having the same positional relationship with the image are aligned with each other. The image will be positioned at a predetermined position on the plate cylinder without the need for registration. Moreover, the vertical and horizontal distances x and y from the first register pin to the origin of the image are input to specify the image exposure position on the film.
It can be positioned arbitrarily and accurately with respect to the printing plate.

<Embodiment> An embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, first, an image is input by an image input device such as an image reading device and a key switch input device using a CRT screen. Such input data can be input via the floppy disk or directly online to the image-sensing device 1
It is input to the central control unit CPU and is stored in the storage device RAM.

Next, various printing modes are designated by the keyboard switch.

That is, a) selection of film material b) selection of positive or negative output image c) selection of positive or negative output image d) coordinate position with respect to register pin The settings and the orientation of the output image are selected.

Next, in the image photosensitive device 1, as shown in FIG. 2, the film f is supplied from the film cassette c to the mounting table 2. The film f is temporarily fixed at a predetermined position on the mounting table 2 by means such as vacuum suction, and then a plurality of first register pins 3 arranged in one direction are provided with positioning holes 5. While being inserted. As a result, the film f is fixed on the mounting table 2 by the first register pin 3. The position of the first register pin 3 is the same as that of the second register pin 24 of the plate cylinder 20, which will be described later, in the same number and interval.

After that, the predetermined image I is exposed on the film f by the laser scanner 4 arranged above the film.
This exposure position and its mode are made according to the designation input from the above-mentioned keyboard switch.

In the coordinate position setting (d) of the designation input, the image orientation of the image I with respect to the film f and the position of the image I on the film f are set. Any one of the register pins 3 (in the embodiment, the reference first register pin 3a at the upper left of FIG. 3) is used as a reference.

That is, first, the orientation of the image I with respect to the film f is designated by a keyboard switch. This aspect is
As shown in FIG. 4, there are various types such as vertical, horizontal, half-rolled, etc., and they are selected in consideration of the intended use of printed matter, layout on paper, and the like.
In FIG. 4, the image I is illustrated by a single "a" to clarify the meaning of the direction.

Next, the position of the origin o of the image I is set. The origin o of the image I is, for example, the upper left position of the image. And the setting is that the film is on the mounting table as the standard first register pin 3a.
The positioning of the pins 3a and the subsequent alignment of the respective materials at this pin position are performed with reference to the position of the pin 3a. Specifically, as shown in FIG. 3, the position of the origin o of the image I is set with the reference first register pin 3a at the leftmost portion as a base point, and the horizontal and vertical intervals x,
Enter y. Actually, the positioning is achieved by arithmetically replacing the distance x, y with the distance from the mechanical origin p of the laser scanner 4 and executing the position setting based on the mechanical origin p.

Here, FIG. 3 exemplifies a case where the image I consisting of “A” is continuously formed in the vertical and horizontal directions. However, by designating the respective origins o at intervals x and y in this way, the image is formed on the film f. The same image I can be continuously exposed vertically and horizontally.

The position can be set by numerically inputting the interval from the reference first register pin 3a, or by selecting a pattern in which the intervals x, y, etc. are predetermined according to the printing form.

As described above, the position of the image I is determined with reference to the reference first register pin 3a, but the first register pin 3a and the third register pin 3a and the second register pin 24 of the plate cylinder 20 are fixed. Since there is a positional relationship, it is safe to say that the position of the image I is based on the first register pins 3a, 3.
In this relationship, as will be described later, it can be said that the position of the image I is set with the second register pin 24 as a reference.

The film f exposed with the image I in the image-sensing device 1
After being subjected to development, is subjected to the next plate making process.

That is, as shown in FIG. 5, the film plate material 10a
Has a positioning hole 11 which is aligned with the positioning hole 5 of the film f formed by perforating the first register pins 3 and 3a. The positioning hole 5 and the positioning hole 11 are aligned with each other to form the film f and the film. After stacking the plate materials 10a and inserting and positioning the intermediate register pin 12, the image I
Is transferred, and the film plate material 10a becomes a printing plate 10b. Therefore, the relationship between the image I of the printing plate 10b and the positioning hole 11 is the same as the relationship between the image I of the film f and the positioning hole 5. Therefore, the positioning hole 5 is the one through which the first register pins 3a, 3 having the same specifications as the second register pin 24 of the plate cylinder 20 (see FIG. 7) are inserted, so that the position of the positioning hole 11 is eventually changed. , And the insertion position of the second register pin 24.

As shown in FIG. 6, the printing plate 10b is provided with mullet allowances 13 for engaging with the groove 21 of the plate cylinder 20 on both side edges thereof. Therefore, as shown in FIG. 7, the mullet margins 13 on both sides are tensioned on each groove 21, the positioning hole 11 is arranged at a predetermined position, and the second register pin 24 is inserted into the positioning hole 11. Positioned.

Thus, the image I of the printing plate 10b wound around the plate cylinder 20 is printed on the plate cylinder 20 from the above-mentioned exposure process to the plate making process.
The second register pin 24 is set as a reference and is sequentially transferred. Therefore, the position is positioned at a predetermined position of the plate cylinder 20. Therefore, even when a business form such as a continuous form is printed, the position shift can be prevented as much as possible.

<Effects of the Invention> In the present invention, as described above, the position of the image I is set with reference to the second register pin of the plate cylinder from the exposure process to the plate making process, and the printing plate is positioned. If you insert the second register pin of the plate cylinder into the hole, naturally,
The image I is positioned at a predetermined position on the plate cylinder. For this reason,
Even when precise alignment is required, such as when printing continuous forms, it can be easily handled without the need for skill, and misalignment can be prevented as much as possible, and the optimal position for the printing plate. You can set the image on. Moreover, it is possible to set the orientation of the image I with respect to the film f of the image I by the designation input from the keyboard switch. Therefore, it is possible to set the image I in a vertical, horizontal, half-turned or other form, and to obtain a printed matter. There is an excellent effect such that an optimum printing form can be easily realized corresponding to the application, layout on a paper surface, and the like.

[Brief description of drawings]

FIG. 1 is a block circuit diagram, FIG. 2 is a schematic side view showing positioning of a film f in an image photosensitive device I, and FIG. 3 is a positioning state of the film f. A plan view, FIG. 4 is a plan view showing a mode of the image I, FIG. 5 is a schematic perspective view showing positioning of the film f and the film plate material 10a, FIG. 6 is a plan view of the printing plate 10b, and FIG. FIG. 3 is a schematic perspective view showing a state where a printing plate 10b is attached to the plate cylinder 20. 1; image photosensitive device, 3; first register pin, 3a; reference first register pin, 4; laser scanner, 5; positioning hole,
10b; printing plate, 11; positioning hole, 12: intermediate register pin,
20; plate cylinder, 24; second register pin, f; film, I; image

Claims (2)

[Claims] 1. An image positioning method for positioning an image on a printing paper, which comprises the following steps, when an image input from an image input means is printed on a required printing paper via a printing plate. Step I A keyboard switch is used to specify the orientation of the image with respect to the film, and among the plurality of first register pins, the vertical and horizontal spacing x from the reference first register pin to the origin of the image,
Enter y to specify the image exposure position on the film. Step II After holding the position of the film by inserting the first register pin into the positioning hole, the image input from the image inputting means by the image photosensitive device is placed on the film with the reference first lesbian scissor pin as the reference position, Then, exposure is performed based on the direction of the image designated by the keyboard switch and the image exposure position to form a developing film. Step III: The developing film and the film plate material are superposed, and the intermediate register pin whose positional relationship with respect to the image is the same as the first register pin is inserted through the positioning holes formed in each to align the two. An image is transferred from the film to form a printing plate from the film plate material. Step IV The positional relationship with respect to the image is the same as each first register pin, a plurality of second register pins arranged at predetermined positions of the plate cylinder of the printing machine are inserted into the positioning holes of the printing plate, Fix the position. 2. An image positioning method for positioning an image on a printing paper, which comprises the following steps, when an image input from an image input means is printed on a required printing paper via a printing plate. Step I The direction of the image with respect to the film is designated by the keyboard switch, and the vertical and horizontal intervals from the reference first register pin among the plurality of first register pins to the origin of the image are inputted to designate the image exposure position on the film. To do. Step II / III After the film made of the film plate material which becomes the printing plate by itself is held in position by inserting the first register pin into the positioning hole, the film is inputted to the film from the image inputting means by the image-sensing device. In step I, the image is exposed with the reference first register pin as the reference position based on the image orientation and the image exposure position designated by the keyboard switch, and a printing plate is formed from the film. Step IV The positional relationship with respect to the image is the same as each first register pin, a plurality of second register pins arranged at predetermined positions of the plate cylinder of the printing machine are inserted into the positioning holes of the printing plate, Fix the position.