JPH0399889A - Machine plate - Google Patents

Abstract

PURPOSE:To contrive to simplify and quicken a machine-plate processing line in a printing system and to improve production efficiency by providing a machine plate itself with a recording medium and by giving the machine plate itself information necessary for printing. CONSTITUTION:A printing equipment 13 prints the picture image of an original picture film 20 on a machine plate 21 and also the identifying mark 22 of the machine plate on the same plate 21. The machine plate 21 developed and fixed by a developing apparatus 14 is carried from the developing apparatus 14 to pattern area-rate measuring apparatus 15 to measure the pattern area rate of the machine plate 21. Pattern area-rate measurement data are transferred to a recording controller 16 and written in the magnetic surface 30 of the machine plate 21 by a recording apparatus 19. Then, the machine plate 21 is sent to a print shop 12 and mounted in a printing machine 17. The reader 27 of the printing machine 17 reads the pattern area-rate measurement data of the machine plate 21 and transfers the data to a controller 18, which receives the transferred data and control an ink supply regulator on the basis of received results to perform printing.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to printing plates.

[Prior Art] In general, a printing system such as offset printing is composed of a plate making room 1 and a printing factory 2, as shown in FIG. A rate measuring device 5 is installed, and a printing machine 6 and a control device (remote control desk) 7 are installed in the printing factory 2.

Here, the printing device 3 prints the image on the original film 8 onto the printing plate 9, and the developing device W14 develops and fixes the printing plate 9. Further, the picture area ratio measuring type fi5 measures the picture area ratio of the printing plate 9 and records the measurement data on the cassette magnetic tape (or other storage medium) 5A. The printing machine 6 also controls the ink supply amount of the plate roller on which the printing plate 9 is attached, the ink source roller that supplies ink to the pattern area of the printing plate 9, and each ink zone divided in the longitudinal direction of the ink source roller. and an ink supply amount adjustment device for adjusting the control bag 2.
I7 is the cassette magnetic tape 5A of the picture area ratio measuring device 5.
The ink supply amount adjustment device of the printing press 6 is controlled based on the measurement results recorded in the .

That is, the printing operation by the conventional printing system is as follows.

■The printing plate 9 that has been subjected to printing and development is temporarily stored or transported manually by the operator to the picture area ratio measuring device 5, and the picture area ratio of the printing plate 9 is measured with the picture area ratio measurement type 2t5, and the measured data is is recorded on the cassette magnetic tape 5A.

■The printing plate 9 and the magnetic tape 5A are transported from the printing room 1 to the printing factory 2 by temporary storage or manual operation by an operator in a state where they are not separated from each other, and the printing plate 9 is mounted on the printing machine 6. , the cassette magnetic tape 5A is put into the control device 7.

(2) The control device 2t7 controls the ink supply amount adjustment device of the print 41!6 in accordance with the recorded data on the cassette magnetic tape 5A, and causes the printing machine 6 to print.

[Problem A to be Solved by the Invention] However, in the conventional printing system described above, it is necessary to store or transport the printing plate 9 and the recording medium such as the cassette magnetic tape 5A without separating them from each other. These are the simplification of the plate processing line in the printing system,
This is hindering the speeding up of the process.

An object of the present invention is to simplify and speed up the plate processing line in a printing system, and to improve its production efficiency.

[Means for Solving the Problems] A first aspect of the present invention is that the printing plate itself has a recording medium.

The second aspect of the present invention is that information necessary for printing is attached to the printing plate itself.

[Function] In the first and second aspects of the present invention, for example, the printing plate itself can have information on image area ratio measurement data of the printing plate by the image area ratio measuring device. Therefore in this case,
During printing, if the information possessed by the printing plate itself installed in the printing press is read by the reader 921 or the like, the ink supply amount adjustment device of the printing press is controlled based on the reading result, and thereby Printing will be performed by a printing machine.

Therefore, the first aspect of the present invention. According to each of the second
It is possible to simplify and speed up the printing plate processing line in the printing system and improve its production efficiency.

[Example 1] Fig. 1 is a schematic diagram showing an example of a printing system in which the present invention is implemented, Fig. 2 is a schematic diagram showing a developing device and a pattern area ratio measuring device, and Fig. 3 is a schematic diagram showing a pattern area ratio measuring device. FIG. 4 is a schematic diagram showing a printing press, and FIG. 5 is a schematic diagram showing an ink supply adjusting device for the printing press.

As shown in FIG. 1, the printing system IO is composed of a plate-making room 11 and a printing factory 12, and a printing device 1 is installed in the plate-making room 11.
3. A developing device 1114, a pattern area ratio measuring device 15, a recording control device 116, and a recording device 19 are installed, and the printing factory 1
A plurality of sets of printing presses 17 and a control device 2t (remote control desk) 18 are installed at 2. Here, the image area ratio measurement W115, the recording device 19 and the recording control device 16, and each of the control devices 18 and the corresponding printing press 17 are connected by signal lines.

The printing device 13 prints the image on the original film 20 onto the printing plate 21 . At this time, the printing device M13 applies the printing plate 2 to the printing plate 21.
Calibration mark 128 used when measuring the pattern area ratio of 1. Also, a specific identification mark (for example, 7″ indicating printing press No. 1 in the illustrated example) 22 is sealed.
The identification mark may be attached by a marking device provided during the conveyance of the printing plate 21. Also, the magnetic surface 30 is made of magnetic material in a portion of the printing plate 21 that does not affect printing. It is formed by coating.

The developing device 14 converts the image on the original film 20 into the printing device 2!
The printing plate 21 printed by Step 13 is developed and fixed. For example, as shown in FIG. 2, the developing device 14 includes a developer supply nozzle 14A, a water washing nozzle 14B, a fixing solution supply nozzle 14C, a water washing nozzle 140, and a dry smoke roller 14E. The printing plate 21 that has been subjected to development and fixing processing is
The image is automatically transported to the picture area ratio measuring device 15 by the transport rollers 26.

The picture area ratio measuring device 15 measures the picture area ratio of the effective picture area of the printing plate 21. The picture area ratio measuring device 15 includes a conveying device 100 and an optical detection head 10 as shown in FIG.
1. An edge detection device Ml 02 is provided, and while the printing plate 21 is moving, its pattern area ratio is measured by a detection radar 101.

The conveyance device loo includes a suction bell (100A) provided below the conveyance surface of the printing plate 21 along the conveyance direction of the printing plate 21 and a printing plate 21.
It is composed of a pressing roller 100B that presses the edge of the sheet from above in a direction perpendicular to the conveyance direction. Note that an encoder 104 is provided on the drive shaft of the suction belt 100A.

The optical detection head 101 has a box-shaped head casing 110, and inside this casing 110, as shown in principle in FIG. 3(A), an illumination optical system 111 and an optical detection head are installed. t2t112 are provided. Illumination optical system 11
1 is two fluorescent lights 113 installed in parallel as a linear light source.
, 113, the vicinity of the end of the fluorescent lamp 113 is held by a fixed holder (not shown), and the casing 110
is fixed to the bottom of both sides.

Further, the optical detection device fil12 is installed in the middle part between the exchange light lamps 113, 113 as shown in FIG.
10 and housed in a box-like casing 110. The optical detection device 112 has a large number of light-shielding boxes 116 arranged in a row, and a light sensor 117 such as a photodiode as a light receiver attached to the top of the light-shielding boxes 116. The lower part of the light-shielding box 116 is open, and a slit 11g is provided at the lower end opening. The fluorescent lamps 113 are installed on both sides of the lower opening of the L-shape box 116.

Fluorescent lamps 113 and 113 constituting the illumination optical system 111 are covered with masks 120 from both sides. mask 120,
120 is attached to the lower part of the casing 110, and includes an arc-shaped or elliptical curved part 121 that covers the fluorescent lamp 113 from the outside, and a printing plate 2 from the outer lower end of this curved part 121.
1 or a straight portion 122 extending obliquely toward the table surface.
and has. 1) The light lamp 113 is disposed at the center or focal point of the curved portion 121 and opens toward the printing plate 21 side.

Further, the curved portion 121 is formed as a reflective surface 121A that reflects the irradiated light from the fluorescent lamp 113. Further, the linear portions 122 of both masks 120 are coated with black, and the fluorescent lamp 11
It is formed as a non-reflecting surface 122A that absorbs the irradiated light from the non-reflecting surface 122A, thereby preventing the adverse effects caused by reflection from the non-reflecting surface 122A. The area of the non-reflective surface 122A allows the reflected light of the fluorescent lamp 113 to pass through the optical detection device 22 from 118
It is sufficient that the light is within a range that can prevent the light from directly entering the light shielding box 116 of the light shielding box 112 .

In addition, both linear portions 122, 122 of the mask 120 are inclined in a direction that gradually approaches the printing plate surface side, and terminate near the printing plate 21 surface, forming an elongated rectangular window portion 125. This window? A125 extends parallel to the longitudinal direction of the fluorescent lamp 113, so that the irradiation light from the fluorescent lamp 113 passes through the window 125 and exposes the detection area A to a slit.

Incidentally, reference numeral 127 denotes a light-shielding plate attached to both sides of the printing plate 21 at a position passing through the calibration mark 128.

Next, the knee/edge detection device M102 uses a proximity sensor or the like to detect when the leading edge in the advancing direction of the printing plate 21 that has passed through the developing device 'l14 has reached the picture area ratio measuring device 15. Based on the signal and the value of the encoder 104 described above, which area (ae) of the moving printing plate 21 is currently facing the detection area 101 is detected.

In such a picture area ratio measuring device η15, X Iu
21 is a suction belt 100A and a pressing roller 1OOB
The robot passes under the rad lot sequentially to be detected while being positioned by the rad lot. The detection head 101 converts the light emitted from the exchange light lamps 113 and 113 of the bright optical system 111 into a mask 12.
The detection area A is irradiated through the rectangular window 125 of 0, and the area is slit. Due to the slit exposure, the reflected light from the printing plate 21 in the detection area A passes through the slit 118 and enters each light shielding box 116 of the optical detection device 112, and the photodiode as a light receiver installed in each of the TcI parts. The light is received by a light sensor 117 such as a light sensor 117, and the reflected light is used to separate the printing plate 21 for each light-shielding box 116.
The pattern area ratio of is measured.

At this time, the reflected light from the calibration mark 128 is input to a predetermined optical sensor 117 without being adversely affected by the surroundings due to the presence of the light shielding plate 127.
7, the gear libration value can be read accurately.

This cali- prene value serves as a measurement standard when measuring the picture area (image area) of the printing plate 21. Therefore, the light sensor 117 of each light-shielding box 116 is connected to the picture surface J&
By measuring Ig, the pattern area ratio of the panel detection area A subjected to slit exposure is measured.

The detection area A on the printing plate 21 moves relative to the printing plate 21 due to the movement of the printing plate 21, but is detected based on the edge detection device 102 and the encoder 104 provided in the edge and conveyance device 100. As described above, the area on the printing plate currently facing the head IO1 can be detected, and thereby the picture area ratio in each predetermined area a to e of the printing plate 21 is measured. In addition, when measuring the pattern area ratio, keep the printing plate 21 in the stopped 1-state.
The detection head 101 may be moved in parallel along the detection surface of the printing plate 21.

Now, the image area ratio measurement data of the printing plate 21 by the image area ratio measuring device 15 is transferred to the recording control device 16. The recording control device NIB performs 1) processing on this measurement data and transfers it to the recording device 19. 719 to make the magnetic surface 30 of the printing plate 21 old with A constant data. Note that the recording bag 19 is a known magnetic recording head 19.
A, the magnetic surface 30 of the printing plate 21 conveyed by the conveyance roller 26 records measured data on the magnetic surface 30 when it passes below the radar 19A.

As shown in FIG. 4, in the printing machine 17, a printing plate 21 is attached to a plate roller 17A, and a dampening water roller 17B, which rotates in contact with the first plate roller 17A, applies water to a portion of the printing plate 21 other than the image. At the same time, the plate roller 17A and kneading roller 1
Ink is supplied to the picture area of the printing plate 21 by the ink source roller 17D rotating via the ink source roller 7C to print. In addition,
The ink supplied to the pattern part of the printing plate 21 attached to the plate roller 17A is transferred to the blanket cylinder (rubber roller) 1.
The image is transferred to printing paper 23 via 7E.

The printing press 17 is equipped with an ink supply IT adjustment device 24 . The ink supply sewing adjustment device ♂24 adjusts each area a of the printing plate 21.
-e (ink bands A1, A2 of ink source roller 17D,
A3 (corresponding to at least a part of the area) according to the pattern area ratio.

The amount of ink supplied to each of these areas is adjusted.

That is, as shown in FIG. 5, the ink supply amount adjusting device 24 has a flat ink blade 24B continuously held in the housing 24A in the longitudinal direction of the ink source roller 17D, and an IP of the ink source roller 170. Each ink zone A1, A2 . A3... A plurality of ink regulators (ink regulators) are provided corresponding to the ink source roller 17D and adjust the degree of advance and retreat of the ink blade 24B for each ink zone to adjust the ink supply device for each ink zone. Adjustment screw) 24C and ink yJA Seiko 24C
It consists of a potentiometer 24D that detects the currently set amount of ink (that is, the current ink supply gap amount between the ink source roller 17D and the ink blade 24B), and an ink regulator drive motor 24E that drives each ink regulator 24C. Note that the rotation of the ink regulator drive motor 24E is controlled by the gear 25.
A, 25B.

It is transmitted to potentiometer 24D via 25C.

Further, each printing press 17 is provided with a reading device 27 having a known magnetic reading head, and a plate roller 17A of the printing press 17 is provided with a reading device 27 having a known magnetic reading head.
The information recorded on the magnetic surface 30 of the printing plate 21 mounted on the printing plate 21, that is, the measurement data of the picture area ratio, is read by the reading device 27. The reading result of this reading bag 7't27 is transferred to the control device 18.

The control device 18 converts the measurement data of the picture area ratio measurement device 15 into motor drive power for each ink band using a predetermined conversion coefficient, and drives the ink regulator drive motor 24E corresponding to each ink band. Control. In addition,
The detection amount of the potentiometer 24D is fed back to the control device 18 at any time, and the state is stopped when the gap between the ink source roller 17D and the ink blade 24B in each ink zone corresponds to the measurement result of the picture area ratio measuring device 15. .

The printing operation by the printing system 10 will be described below.

■For printing, the image of the original film 20 is printed on the printing plate 2 using 13.
At the same time, the identification mark 2 is printed on the printing plate 21.
Burn 2.

r2) Printing plate 21 developed and fixed in the developing device 14
is automatically conveyed from the developing device 2t14 to the picture area ratio measuring device 15 by the conveyance roller 26 and suction bell) 100A, and the picture area ratio of the printing plate 21 is measured.

(2) The image area ratio measurement data of the il1 plate 21 is transferred to the recording control device 16 and written on the magnetic surface 30 of the printing plate 21 by the recording device 19.

[4] Send the printing 1i1721 from the plate-making room 11 to the printing T-station 12, and in this example, since the identification mark is 7'',
No. 7 is attached to the plate roller 17A of the printing press 17.

(2) Reading of the printing press 17 The claw device 27 reads the image area ratio measurement data recorded on the magnetic surface 30 of the printing plate 21 mounted on the printing press 17, and transfers it to the control device 18.

+a+ The control device 18 receives the transferred data from the reading device 27 and adjusts the ink supply of the printing press 17 based on the reception result! The device 24 is controlled and the printing machine 17 performs printing.

Next, the operation of the above embodiment will be explained.

In the embodiment described in I-, the printing plate 21 has an identification mark "7'".
, the printing plate 21 is attached to the No. 7 printing machine 17. In addition, the image area ratio measurement data of the printing plate 21 by the image area ratio measuring device 15 is recorded on the magnetic surface 30 of the printing plate 21, and at the time of first printing, the image area ratio measurement data is recorded on the magnetic surface 30 of the printing plate 21. Image area ratio measurement data is read from the magnetic surface 30 of the printed printing plate 21, and based on this measurement data, the control device 2718 controls the ink supply 9m adjustment device 24 of the printing press 17. printing is performed.

That is, in the embodiment described in (■-), an identification mark 22 indicating the printing machine number to which the printing plate 21 is installed is attached, and the pattern area ratio measurement data is based on the magnetic field of the printing plate 21. Since the information is recorded on the surface 30, handling of the printing plate 21 and the measurement data becomes easy.

Therefore, according to the embodiment described above, it is possible to simplify and speed up the printing plate processing line in the printing system IO, and to improve its production efficiency.

In addition, in the above embodiment, the magnetic surface 30 is
The printing plate 21 is already formed in step 1i after the baking step of step 21. However, for example, the developing device 14 and the image surface: pHI 11 constant device? A magnetic tape supply device is provided between the plate 115 and the plate 21 after development, and a predetermined length of magnetic tape is attached to the plate 21, thereby forming a printing plate having a recording medium. Good too.

Further, in the above embodiment, the image area ratio measurement data of the magnetic surface 30 formed on the printing plate is read by the reading device 27 provided in the printing machine, but for example, the control device 18 is equipped with a reading device A. Even if the image area ratio measurement data is read before the printing plate 21 is mounted on the printing press 17, the operator operates a portable reading device and the image area ratio measurement data read by the portable reading device is read. The read signal may be transferred to the control device 2'l18.

Further, although an example in which a magnetic material is used as the recording medium has been described, a semiconductor memory element may be used instead.

Furthermore, in the embodiment, the recording medium 30 was provided on the lower right side of the figure on the surface of the printing plate 21, but this did not affect the printing! It can be placed anywhere as long as it is not visible, even on the back side, especially if it is placed on the left side of the figure.

Optical detection head 101 and recording device 1 in FIG.
9 can also be provided adjacently.

Note that it is useful to record the following data a to g (see FIG. 7) unique to each printing press on the recording medium of the printing plate 21.

a...Printing machine No.

b...Effect size (effective pattern area length in the lower L direction of the printing plate (direction corresponding to the solid direction of the plate roller) (image surface
I! 1 rate measurement range length)) C... Void size (distance from the bottom edge of the printing plate to the effective pattern area) d... Detect point (left and right direction of the printing plate (progressing direction to the pattern area ratio measuring device) ) e...Total length (total length in the horizontal direction of the printing plate) f...Key pitch (each ink zone 41 of the ink supply amount adjustment device g... Number of keys (number of ink bands in the ink supply amount adjustment device) In other words, in the printing system, the above data b to e and f concerning the printing plates attached to each printing machine are
, g are fixed values (in a printing press having multiple units, the structures of each unit are usually the same, and the data a to g for each unit are the same).

Therefore, if the above data a to g are recorded on the recording medium in advance, the picture area ratio measuring device detects the leading edge in the traveling direction of the printing plate to be measured this time using the edge detecting device 102, and then detects the leading edge in the traveling direction of the printing plate to be measured this time. The reading device 103 shown by the imaginary line 1 reads the data a-H recorded on the magnetic surface 30 of the printing plate, and based on the read data a-H, the effective picture area of the printing plate, i.e. The measurement range is determined, and as a result, the optical sensor to be used in the pattern area ratio measuring device 15 is selected, and it corresponds to each ink band (A1, A2, A3, etc.) of the ink supply sewing adjustment device within the effective pattern area. The pattern area ratio of each area (ae) can be calculated and measured data can be recorded on the magnetic surface 30. Therefore, it is no longer necessary for the operator to manually input the above data a to g regarding the printing plate to be measured this time, and it is possible to perform the image area ratio measurement operation and calculation operation quickly and without waste, and unmanned operation is also possible. .

In the above embodiment, one of the pieces of information necessary for printing is the printing machine number to which the printing plate 21 is attached.
Although the printing device 13 is used to attach the image to the printing plate 21, it may also be applied to the printing plate 21 using a jet printer or the like.Furthermore, the information required at the time of printing includes the above-mentioned printing machine number and pattern area ratio. In addition to measurement data, job number
, and furthermore, the printing press No. and the unit No. of the printing press may be 0. For example, in the case of a multicolor printing press consisting of four colors (yellow, magenta, cyan, black), the first plate roller, Ink source roller,
There are 41 units composed of the same a structure including an ink supply @adjustment device and the like. Four printing plates are required for each color. Therefore, printing@No, and Uni, where the printing plate will be attached to that printing machine, )No
, each corresponding to the printing plate! It is attached as a 51+1 mark. By doing this, if you look at the printing press number and unit number attached to the printing plate,
The printing press to which the printing plate is attached and the unit within the printing press can be easily identified, and fI! The handling of printing plates in the 11 system can be improved.

Here, the information required at the time of printing includes the printing machine number 8, job number, unit number, etc. attached to the printing plate.
, pattern area ratio measurement data, etc. may be printed on the printing plate 21 with a code such as a bar code.

Further, in the printing plate processing step, in addition to the developing device 14 of the above embodiment, some or all of the following processing steps may be required depending on the printing plate. In other words, the development process of commonly used positive-type printing plates removes the photosensitive layer in areas exposed to light (non-image areas) and desensitizes it (
This is done to prevent ink from adhering to the surface, but any unnecessary photosensitive layer that remains in some areas even after the development process is removed by applying an erasing liquid to only those areas and dissolving them. After drying, the surface leveling liquid is applied to the entire printing plate, and the plate surface is dried by puff drying so that no surface leveling liquid remains on the printing plate surface. These surface smoothing treatments and puff drying are preparation steps for the burning (high-temperature heating) treatment, and by performing the burning treatment subsequently, the printing durability of the printing plate can be increased to 2.
~3 times as much. Finally, in order to protect the surface of the non-image area and to further increase hydrophilicity, a so-called gumming treatment can be performed to complete the printing plate treatment process.

Therefore, the processing contents of the printing plate are recorded on the recording medium of the printing plate,
Alternatively, it is also possible to clarify the necessary plate processing steps by baking or printing.

[Effects of the Invention] As described above, according to the invention, the printing plate processing line in the printing system can be simplified and speeded up, and its production efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an example of a printing system in which the present invention is implemented, FIG. 2 is a schematic diagram showing a developing device and a pattern area ratio measuring device, and FIG. 3 is a schematic diagram showing a pattern area ratio measuring device. Fig. 4 is a schematic diagram showing a printing press, Fig. 5 is a schematic diagram showing an ink supply amount adjustment device of the printing press, Fig. 6 is a schematic diagram showing a conventional example of a printing system, and Fig. 7 is a printing plate. It is a schematic diagram. IO...Printing system, 14...Developing device, 5...Picture area ratio measuring device, 6...Recording control device, 7...Printing machine, 8...Control device, 9... Recording device, 1... printing plate, 2... identification mark. 4... Ink supply amount adjustment device, 7... Reading device, 0... Magnetic surface.

Claims (2)

[Claims] (1) A printing plate with a recording medium. (2) A printing plate with information necessary for printing.