JPH028082A - Plate processing and pattern area ratio measurement system - Google Patents

Abstract

PURPOSE:To achieve simplification and speeding up of a printing plate treating line in a printing system and to improve its productive efficiency by a method wherein the printing plate for which treatment of development or the like is ended is automatically conveyed to a pattern areal rate measuring device with a conveying apparatus and a pattern areal rate is measured. CONSTITUTION:A printing plate 21 which is developed and fixed with a developing device 14 is automatically conveyed from the developing device 14 to a pattern areal rate measuring device 15 with a conveying roller 26 and a suction belt 100A, and a pattern areal rate of the printing plate 21 is measured. At that time an identity mark 22 of the printing plate 21 is also simultaneously, read. The pattern areal rate of the printing plate 21 and the identity mark are made to form a pair, which is recorded to be stored in a memory 16 for each new printing plate 21. The memory 16 transmits a pattern areal rate measuring data of the printing plate 21 corresponding to the identity mark 22 designated with a controller 18 to the controller 18. The controller 18 receives a transmit data from the memory 16, and controls an ink feed amount regulator 24 of a printer 17 to perform printing by the printer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing plate processing and a pattern area ratio measurement system.

Conventional technology 1 In general, printing systems such as offset printing.

For example, as shown in FIG. 6, it is composed of a plate-making room 1 and a printing factory 2, and the plate-making room 1 includes a printing device 3. A developing device 4 and a pattern surface a ratio measuring device 5 are 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 4 develops and fixes the printing plate 9. Further, the picture area ratio measuring device 5 measures the picture area ratio of the printing plate 9 and records the measurement data on a 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. The control device 7 controls the ink supply amount adjusting device for printing #16 based on the measurement results recorded on the cassette magnetic tape 5A of the picture area ratio measuring device 5. .

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 an operator to the picture area ratio measuring device 5, and the picture area ratio of the printing plate 9 is measured by the picture area ratio measuring device 5.
Measurement data is recorded on cassette magnetic tape 5A.

■The printing plate 9 and the cassette magnetic tape 5A are temporarily stored without being separated from each other, or are transported from the plate making room l to the printing factory 2 by an operator's manual work, and the printing plate 9 is mounted on the printing machine 6, and the cassette magnetic tape 5A is input to the control device 7.

■The control device 7 controls the ink supply amount adjustment device of the printing press 6 according to the recorded data on the cassette magnetic tape 5A,
Printing is performed by the printing machine 6.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional printing system, the printing plate 9 is temporarily stored between the developing device 4 and the pattern area ratio measuring device 5, or manually by the operator. This obstructs the simplification and speeding up of the printing plate processing line in the printing system.

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

Means for Solving the Problems] The present invention provides a printing plate processing device that processes a printing plate on which an image of an original film is printed, and a printing plate processing device that measures the pattern area ratio of the printing plate processed by the printing plate processing device. This apparatus includes a picture area ratio measuring device and a conveying device that automatically transports the printing plate processed by the printing plate processing device from the printing plate processing device to the picture area ratio measuring device.

[Function] In the present invention, the printing plate that has been subjected to processing such as development is automatically conveyed to the picture area ratio measuring device by the conveyance device, and the picture area ratio is measured.

That is, in the present invention, there is no need to temporarily store the printing plate or to transport it manually by the operator between the printing plate processing device and the pattern area ratio measuring device.

Therefore, according to the present invention, the simplification of the printing plate processing line in the printing system, ij! It is possible to increase the production speed and improve the production efficiency.

[Example] 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 amount adjusting device of the printing press.

As shown in FIG. 1, the printing system 10 is composed of a plate making room 11 and a printing factory 12.
3. Developing device 14, pattern area ratio measuring device 15, memory bag M
(Large capacity memory data terminal) 16 is installed, and the printing factory 12 is equipped with a plurality of printing machines 17, a control device (remote control desk) 18, and an intermediate terminal 19. Here, the picture side a book measuring device 15 and the storage device 16
．． Storage device 16 and intermediate terminal 19. Intermediate terminal 19 and each control device 18. Each control device 18 and the corresponding printing press 17 are connected via a signal line.

A printing device 113 prints the image on the original film 20 onto a printing plate 21.
Burn it on. At this time, the printing device 13 prints a calibration mark 128. A specific identification mark (for example, "7" in the illustrated example) 22 is attached to each row. Note that a bar code or the like can also be used as an identification mark.

The developing device 14 transfers the image on the original film 20 to the printing device 1.
The printing plate 21 printed in step 3 is developed and fixed.

The developing device 14 includes, for example, a developer supply nozzle 14A, a water washing nozzle 14B, and a fixer supply nozzle 1, as shown in FIG.
It is composed of a 4C1 water washing nozzle 140 and a drying roller 14E.

When measuring the pattern area ratio! ! 15 measures the pattern area ratio of the printing plate 21. The picture area ratio measuring device 15 is connected to a conveying device 100 as shown in FIG. It has an optical detection plate, an edge detection device W1102, and a mark reading device 103, and the printing plate 2
During the movement of 1, the picture area ratio is measured by 9D 101 for detection.

The conveying device lOO includes a suction bell (100A) provided below the conveying surface of the printing plate 21 along the conveying direction of the printing plate 21 and a printing plate 21.
It is composed of a pressing roller 100B that presses down 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 11O, as shown in principle in FIG. 2112 are provided. Illumination optical system 111
Two fluorescent lamps 113 are arranged in parallel as a linear illumination light source.
The fluorescent lamp 113 has a fluorescent lamp 113. The end portion of the fluorescent lamp 113 is held by a fixed holder (not shown), and is fixed to the bottom of both sides of the casing 110.

Further, the optical detection device 1112 is installed above 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 slot 7) 118 is provided at the lower end opening. The fluorescent lamps 113 are installed on both sides of the lower opening of the light shielding 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 lamps 113, 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. The fluorescent 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 straight portions 122 of both masks 120 are coated with black, and the fluorescent lamps 113
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 is fluorescent lamp 1
13 reflected light from the slit 118 to the optical detection device 11
It may be within a range that can prevent the light from directly entering the light shielding box 116 of No. 2.

Further, the parallel lines 122, 122 of the mask 120 are inclined in a direction that gradually approaches the printing plate surface side, and end in the vicinity of the printing plate 21 surface, forming an elongated rectangular window portion 125. This window portion 125 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 portion 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 processing detection device 102 uses a nearby 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 14 has reached the picture area ratio measuring device 15, and this detection signal is Based on the value of the encoder 104 described above, which area (a-
It is detected whether or not e) is facing the detection radius 101.

The mark reading device 103 is a known recognition device that reads the aforementioned identification mark 22 ("7" in the illustrated example) printed on the printing plate 21.

In such a picture area ratio measuring device 15, the printing plate 21
pass under the detection head 101 one after another while being positioned by the suction belt 1oOA and the pressing roller 100B. The detection head 101 irradiates the detection area A with the irradiation light from the exchange light lamps 113, 113 of the illumination optical system 111 through the rectangular window part 125 of the mask 120, and exposes the area to slit light. Due to the slit exposure, the reflected light from the printing plate 21 in the detection area A passes through the slit 118.

The light enters each light-shielding box 116 of the optical detection device 112, and is received by a light sensor 117 such as a photodiode as a light receiver installed on the top of each of them. The pattern area ratio of the plate 21 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 calibration value can be read accurately.

This calibration value serves as a measurement standard when measuring the picture area (image area) of the printing plate 21. Thus, the photo sensor 117 of each light-shielding box 116 measures the pattern area ratio, thereby measuring the pattern area ratio of the panel detection area A subjected to slit exposure.

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 the edge detection device 1102. As described above, the area on the printing plate currently facing the detection head 101 can be detected based on the encoder 104 provided in the conveyance device lOO, and thereby each predetermined area a-e of the printing plate 21 can be detected. The pattern area ratio in each will be measured. Note that the measurement of the picture area ratio may be performed by keeping the printing plate 21 in a stopped state and moving the detection head 101 in parallel along the detection surface of the printing plate 21.

As shown in FIG. 4, in the printing machine 17, a printing plate 21 is attached to a printing roller 17A, and a dampening water roller 17B that rotates in contact with the printing roller 17A applies wood 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 pattern portion of the printing plate 21 by the ink source roller 170 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 Mark III machine 17 includes an ink supply amount adjustment device 24. The ink supply amount adjusting device 24 controls each region a to e of the printing plate 21 (the ink zones At and A2 of the ink source roller 170).
, A3...)
The amount of ink supplied to each area is adjusted according to the picture area ratio in each area.

That is, as shown in FIG. 5, the ink supply amount adjusting device 24 includes a flat ink blade 24B that is continuously held in the housing 24A in the longitudinal direction of the ink source roller 170, and a flat ink blade 24B that is continuously held in the longitudinal direction 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 amount of ink supplied to each ink zone by adjusting the degree of advance and retreat of the ink blade 24B with respect to each ink zone of the ink source roller 17D. TI4 adjustment screw) 24C and ink regulator 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 24H is controlled by the gear 25.
It is transmitted to potentiometer 24D via A, 25B, and 25C.

Control device! 8 converts the measurement result of the picture area ratio measuring device 15 into a motor drive amount for each ink band using a predetermined conversion coefficient, and drives and controls the ink regulator drive motor 24E corresponding to each ink band. . Note that the detection amount of the potentiometer 24D is fed back to the control device 18 at any time, and the control device 18 stops when the gap between the ink source roller 170 and the ink blade 24B in each ink zone corresponds to the measurement result of the pattern area ratio measuring device 15. do.

In the printing system 10, as shown in FIG.
is automatically transported from the developing device 14 to the picture area ratio measuring device 15 using the transport roller 26 and the suction belt 100A. In the example shown in FIG. 1, the pattern area ratio measuring device 15 is integrated with the printing plate outlet portion of the developing device t14. However, the developing device 14 and the image area ratio measuring device W115 may be installed separately and connected by a belt conveyor or the like that automatically conveys the printing plate 21.

Further, the picture area ratio measurement device 15 measures the picture area ratio of the printing plate 21 with the optical detection head 101 as described above, and also measures the identification mark 22 attached to the printing plate 21 by the printing device M13 with a mark reading device. It is detected at 103. In addition,
The identification mark 22 may be applied not by the printing device 13 but by the image area ratio measuring device 15 or a marking device provided during the conveyance of the printing plate 21.

Here, the picture area ratio of the printing plate 21 measured by the picture area ratio measuring device 15 is recorded in the storage device 16 together with the identification mark 22 read by the mark reading device 103.

On the other hand, each printing press 17 is provided with a mark reading device 27, and the identification mark 22 of the printing plate 21 mounted on the plate roller 17A of the printing press 17 is read by the mark reading device 27.

The reading result of this mark reading device 27 is transferred to the control device 18.

Based on the identification mark 22 read by the mark reading device 27, the control device 18 transmits the image area ratio of the printing plate 21 corresponding to the identification mark 22 from the storage device 16, and controls the printing press 17 based on the received result. Ink supply amount adjustment device M24
is controlled as described above.

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

(2) The printing device 13 prints the image on the original film 2o onto the printing plate 21, and also prints the identification mark 22 onto the printing plate 21.

■The plate 21 developed and installed in the developing device 14 is transferred to the conveying roller 26 and the suction belt 100A to the developing device 1.
4 to the picture area ratio measuring device 15, and the printing plate 21
Measure the picture surface a ratio.

At this time, the identification mark 22 on the printing plate 21 is also read at the same time.

(2) The image area ratio of the printing plate 21 and the identification mark are recorded and stored in the storage device 16 as a pair for each new printing plate 21.

(2) The printing plate 21 is sent from the plate making room 11 to the printing factory 12 and is mounted on the plate roller 17A of the printing machine 17.

(The controllable device 18 is the mark reading device 27 of each printing press 17.
The identification mark 22 of the printing plate 21 mounted on the printing press 17 is read, and the image area ratio measurement data of the printing plate 21 corresponding to the identification mark 22 is requested from the storage device 16.

(2) The storage device 16 transmits the image area ratio measurement data of the printing plate 21 corresponding to the identification mark 22 specified by the control device 18 to the control device M18.

(2) The control device gia receives the transmission data from the storage device 16, controls the ink supply amount adjusting device W124 of the printing press 17 based on the reception result, and causes the printing press 17 to print.

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

In the embodiment described above, the plate 21 that has been developed is automatically conveyed to the picture area $1 ratio measuring device 15 by the conveyance roller (conveyance device) 26 and the suction belt 100A, and the picture area rate is measured.

That is, in the above embodiment, there is no need to temporarily store the printing plate 21 or transport it manually by the operator between the developing device 14 and the pattern area ratio measuring device 15.

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 improve its production efficiency.

In addition, in carrying out the present invention, the printing plate processing apparatus includes, in addition to the developing device 5114 of the above embodiment, some or all of the following processing steps that are performed on ordinary printing plates. In other words, the development process of normally used positive type printing plates removes the photosensitive layer in areas exposed to light (non-image areas) and desensitizes them (prevents ink from adhering to the surface). This is done to remove unnecessary photosensitive layers that remain in some areas even after development, by applying erasing liquid only to those areas.Next, after drying, leveling liquid is applied to the entire printing plate. After coating, the printing plate is dried evenly by puff drying so that no leveling liquid remains on the printing plate. These surface smoothing treatments and puff drying are preparation steps for the burning (high-temperature heating) treatment, and by subsequently performing the burning treatment, the printing durability of the printing plate is increased by 2 to 3 times. Finally, in order to protect the surface of the non-printing area and further improve the affinity for wood, so-called gumming treatment can be performed to complete the printing plate processing process.

[Effects of the Invention] As described above, according to the present 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 the drawing]

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, Ps5 is a schematic diagram showing an ink supply amount adjusting device of the printing press, and FIG. 6 is a schematic diagram showing a conventional example of a printing system. 14...Developing device. 15... Image area ratio measuring device, 21... Printing plate, 26... Conveyance roller (conveyance device). Agent Patent Attorney Osamu Shiokawa Figure 3 (A) Figure 4

Claims (1)

[Claims] (1) A printing plate processing device that processes a printing plate on which an image of an original film is printed, a pattern area ratio measurement device that measures the pattern area ratio of the printing plate processed by the printing plate processing device, and a printing plate processing device. A printing plate processing and pattern area ratio measuring system comprising a conveying device that automatically transports a printing plate processed by the device from a printing plate processing device to a pattern area ratio measuring device.