JPS58224753A - printing system - Google Patents

Abstract

PURPOSE:To accurately control the amount of ink by such an arrangement wherein the rate of area of picture pattern of a printing plate is measured by the unit of a fixed width, and the data thus obtained are converted into data of area of picture pattern of the fixed width of ink key of a printing unit and the degree of opening of each ink key is determined by the data. CONSTITUTION:The rate of area of picture pattern of a printing plate 51 is measured by the unit of a fixed width by a measuring instrument 35 which is caused to scan, and the data are calculated by a CPU 32 and the results are memorized in a memory 33. Data information read out from the memory 33 in accordance with a transmission command is converted into data of rate of area of picture pattern by the unit of a fixed width by a CPU 22 and based on the converted data, the degree of opening of each of ink keys 111-11n of a printing unit is set and thereby, the amount of ink to be supplied is adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing system that automatically sets the amount of ink in a printing unit based on image area ratio data obtained from a printing plate.

In recent printing systems, the so-called inking preset system has been adopted, which sets the amount of ink in the printing section based on the printing plate's image area ratio (the ratio of the area of the image area to the total area of the printing plate). . The conventional inking preset system uses a pattern area ratio measuring device to determine the pattern area ratio from the printing plate before it is mounted on the plate cylinder, records the measured data on a magnetic card, cassette tape, etc.
This magnetic card, etc. is carried along with the printing plate to a designated printing machine, and each printing machine reads the measurement data recorded on the magnetic card, etc., and automatically sets the opening degree of the ink key based on the read measurement data. It is.

However, in the case of such conventional systems, when measuring the image area ratio from a printing plate, the width of the ink key of the printing press to which the printing plate is installed is specified, and the image area ratio is measured in units of the specified width. Therefore, 1. For example, if a printing plate for which measurement has been completed is to be installed in a printing press of a different model with a different width of print keys, the image area ratio must be measured again. Moreover, since this method uses a magnetic card as a medium, there is a limit to the amount of data that can be recorded, and the reliability of the recorded data decreases because the magnetic card is carried to each printing machine. There is a problem.

An object of the present invention is to be able to measure the pattern area ratio without considering the model of the printing press to which the printing plate is attached, and to determine the amount of ink in the printing section of the printing press based on the measured pattern area ratio data of the printing plate. K so that it can be set accurately and automatically.
The goal is to provide a printing system that is

Therefore, in the present invention, the picture area ratio of the printing plate is measured in units of a fixed width, and the measurement is:
I. A pattern area ratio measurement device that collects and stores pattern area ratio data for each printing plate and a control unit that adjusts the opening degrees of multiple ink keys in the printing unit are connected to each other via a transmission line, and the control unit The picture area ratio measuring device is instructed to transmit the picture area ratio data of the specified printing plate, and after receiving the picture area ratio data in fixed width units transmitted from the picture area ratio measuring device according to the command, the printing starts. By converting the image area ratio data in unit of the width of the ink key of the printing section, and setting the opening degree of the ink key of the printing section based on the converted data,
The image area ratio data measured by the image area ratio measuring device is directly transmitted to the control unit that adjusts the opening of the ink key in the printing unit, without using a conventional magnetic card or the like as an intermediary.
This control section performs data width conversion to achieve the above objective.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the printing system of this embodiment.

In the figure, 311 is a picture area ratio measuring device, P1 to P
n is a printing machine, which includes a picture area ratio measuring device 31 and each printing machine P1.
~Pn are connected to each other via a transmission line 41 of an optical cable. The picture area ratio measuring device 31 is C
The PU (central processing unit) 32 includes a memory 33 . Ilo
``Knits 34A and 34B are connected to each other.

A scanning section 35 is connected to the I10 unit) 34A. The scanning unit 35 irradiates the printing plate 51 with light from a light source, receives reflected light from the printing plate 51, converts the amount of the received reflected light into an electrical signal, and provides it to the front CPU 32. Scanning is performed in the width direction of the printing plate 51 according to instructions from the CPU 32 and others. Maebemi CPU3
2, each time the scanning unit 355 moves by a certain width in the width direction of the first edition 510, the signal applied from the scanning unit 35 is processed to obtain the picture area ratio;
The picture area ratio data for each fixed width unit is sequentially stored in the memory 33.
At the same time, the image area ratio data stored in Memo 1 No. 33 is transmitted to the printing machines P1 to Pn that have issued the transmission command in accordance with transmission commands from each of the printing machines P1 to Pn. .

On the other hand, each printing machine P1 to Pn has a printing section 1 and a space 1" and a printing section 2.
It is composed of 1. Previous samurai seal notification) 1 part 1 is the 2nd
As shown in the figure, for example, black,
A plurality of printing units (IA to ID) each performing indigo, red, and yellow printing processes are installed in this order. each printing unit)
Printing devices 21 to 28 are provided at IA to ID for the upper and lower surfaces of the printed matter W, respectively. After each printing @21～
28, as shown in FIG. 3, an ink roller 4 is formed on the circumferential surface of an ink dispenser roller 3 which is driven to rotate clockwise in the figure by a DC motor or the like, and the ink is ink stored in the ink roller 4. The trap is such that the ink is drawn out while being attached to the surface of the ink ductor roller 3. The ink adhering to the surface of the ink dispenser roller 3 is transferred to an ink transfer roller 6 provided at the tip of the swinging arm 5.
It is transferred to the kneading roller rough through. For the kneading roller rough, the roller 8, the plate cylinder 9 on which the printing plate 51 is attached, and the drum cylinder 1O in contact with the printed matter W are arranged so as to rotate in sequence while slidingly in contact with each other. Here, the number of rotations of the plate cylinder 9 is N
o, the number of oscillations of the ink transfer roller 6 is KNo(
K is a constant).

Therefore, when the ink dispenser row 23 is rotated, there is no ink! The ink stored in 4 is drawn out while being adhered to the surface of the ink dispenser roller 30, and then transferred at regular intervals to the trapping roller 7 via the ink transfer roller 6, and is further transferred from the ink roller rough to the trapping roller 7. is transferred to the blanket cylinder 10 via the roller 8 and the printing plate 51 mounted on the plate cylinder 9. As a result, the printed matter WK in contact with the blanket cylinder 10 is printed in a predetermined color.

Further, as shown in FIGS. 4 and 5, each of the ink embeddings 4 is arranged along the longitudinal direction of the ink dispenser roller 3.
A plurality of inclined ink keys 111 to 11n are arranged in parallel. Each of the ink keys 111 to lln is configured such that its upper end is a fulcrum and its lower end is movable toward and away from the circumferential surface of the ink dispenser roller 3, and the opening degree of the gap 12 is determined by the ink amount adjusting device 13. ~13nK, respectively. Each of the ink amount adjusting devices 131 to 13n is configured as a motor p14. ~14 degrees, and the rotating cylinder 15. which is rotated by the motors 141 to 14n. ~15n and this rotating tube 1
The ink key 1 moves forward and backward with the rotation of 51 to 15n.
11 to 11n toward and away from the circumferential surface of the ink dispenser roller 3.

On the other hand, the control section 21 causes the CPU 22 to connect the transmission line 4 to the I10 unit) 34B of the picture area ratio measuring device 31.
I10 unit 23 connected via 1, input device 2
4, a memory 25, and an I10 unit 26 are connected, respectively. The I10 unit 26 contains the amount of ink for each of the printing machines 21 to 2 in each of the printing machines P1 to Pn! #Setting a, 131 to 13n are connected. The input device 24 also contains data such as the unique machine numbers of the printing machines P1 to Pn, the code for the 510 printing plates installed in the machines, and the widths of the ink keys Ill to 11n.
A transmission command is input to the CPU 22. CPU22
a. When the #shelf number, edition code, and transmission command are input from the input device j124, it instructs the picture area ratio measuring device 31 to transmit the picture creation ratio data specified by the edition code, and The picture area ratio data transmitted from the picture area ratio measuring device 31 according to the command is stored in the memory 25, while the data on the width of the ink keys Ill to lln input from the input device 24 is
5, press the ink key Ill~
11n, and each ink amount adjusting device 131-13n is operated accordingly. for example,
The image area ratio data stored in the memory 25 is data in 111III width units of the printing plate 51, and the ink keys Ill to l
If the width of ln is 30m+, the data in memory 25 is 3
It is converted to 0wg+picture area ratio data/width unit.

Next, the operation of this embodiment will be explained. First, the pattern area ratio of the printing plate 51 is measured using the pattern area ratio measuring device 31 . When measuring the picture area ratio, when the scanning unit 35 is moved in the width direction of the printing plate 51 before it is attached to the plate cylinder 9, the printing area and the non-printing area of the printing plate 51 are optically separated. automatically scanned and detected.

Then, the CPU 32 processes the signal given from the scanning section 35, and processes the scanning section 23 for each range in which the scanning section 23 moves a distance smaller than the width of the ink keys 111-lln of each printing press P1-Pn, for example, every 1llI width of the printing plate 51. The picture area ratio is calculated, and the picture area ratio data for each stroke width is sequentially stored in the memory 33. In the same way, when all the printing plates 51 installed in the printing devices 21 to 28 of at least one printing machine P1 to Pn are measured, the memory 33 stores a certain width for each printing plate 51. The unit image area ratio data is stored in total. In this way, measurements are continuously performed for the number of printing plates 51 that can be stored in the memory 33, and the measurement results are stored in the memory 33.

Therefore, the printing plate 51 for one printing machine, which has been measured by the picture area ratio measuring device 131, is transferred to the printing device 2 of that printing press.
1 to 2n, and after setting the printing plates 51 on the outer periphery of the plate cylinder 9, the amount of ink for each printing device 21 to 28 in the printing section IK is preset.

To do this, the control section 21 inputs each plate code through the input device 24, and then gives a transmission command. For example, in order to preset the amount of ink in the printing devices 21 to 28 of the printing press P1, in the control section 21 of the printing press P1, input the input device 24 to the printing devices 21 to 28 of the printing mode P1.
After inputting a plate code that makes up one set of all printing plates 51 set on each of the 8 plate cylinders 9, a transmission command is given. Then, the CPU of the printing machine P10 control unit 21
22 is an input device 2 for the picture area ratio measuring device 31.
Send the version code entered from step 4. Accordingly, in the picture area ratio measuring device 31, the CPU 32 reads out the picture area ratio data corresponding to the received plate code from the memory 33, and transfers it to the printing machine P1 that transmitted the plate code.
The information is transmitted to the control unit 21 of.

Then, in the control unit 21 of the printing press P1, the CPU 2
2 receives the picture area ratio data transmitted from the picture area ratio measuring device 31 and stores it in the memory 25.

Here, in the control unit 21 of the printing press P1, the input device 2
When the width data, for example 30-, of the ink keys 111 to 11n in the printing press P1 is inputted from 4 to 4, the CPU 22 reads out the image area ratio data stored in the memory 25 in fixed width units, for example, IIII width units, and reads it. After converting into image area ratio data in 301111 width units, the ink amount adjusting devices 131 to 13n are operated according to the image area ratio data for each width. As a result, the opening degree of the ink keys Ill to lln of each printing device 21 to 28 is automatically set based on the image area ratio data obtained from the printing plate 51, so that each ink key Ill to lln
The amount of ink converted to the opening degree is supplied. In this way, the ink amounts of the other printing machines P2 to Pn are also automatically set to be busy.

Therefore, in this embodiment, the image area ratio measurement device 31 measures the image area ratio of the printing plate 51 in fixed width units and stores the measured image area ratio data in fixed width units for each printing plate, and The control units 21 for adjusting the ink amount of the printing units 1 in the printing machines P1 to Pn K are connected to each other via the transmission line 41, and the picture area ratio measuring device 31 is connected to the control unit 21 for each of the printing machines P1 to Pn. Instructs to transmit the image area ratio data of the printing plate specified by the plate code, receives the image area ratio data transmitted from the image area ratio measuring device 31 according to the command, and receives the received image area ratio. Based on the data, the printing device 21 of the printing section l
Since the ink amount of ~28 is set, the image area ratio data measured by the image area ratio measuring device 31 is transmitted to each printing machine P1 without using a conventional magnetic card.
~Pn can be transmitted directly to the control unit 21 of the printing presses pl-pn, thereby setting the ink amount of the printing section 1 of each printing press pl-pn.As a result, the ink amount of the printing section 1 of each printing press P1-pn can be set. Can be set accurately and automatically.

In particular, the image area ratio data measured by the image area ratio measuring device 31 is calculated by the ink key 11 of each printing machine pl-pg. While counting in units of a width that is sufficiently narrower than the width of . / Kiki 111. Since the image area ratio data is converted to the same width unit as the width of u, ink key 1 of multiple printing machines P1 to Pn
Even if the widths of 11 to 11B are different, the image area ratio measuring device 31 only has to process the data in constant width units. Therefore, when measuring the image area ratio, the printing plate 5
Ink key 111~ even if you are not sure which model to install 1
Continuously print multiple printing plates 51 without considering the width of lln
The picture area ratio can be measured and the data can be stored.

As described above, according to the present invention, the picture area ratio can be measured without considering the model of the printing press to which the printing plate is attached, and the printing machine's printing It is possible to provide a printing system that can accurately and automatically set the amount of ink for a copy.

[Brief explanation of drawings]

The figures show one embodiment of the present invention. Fig. 1 is a block diagram showing the printing system, Fig. FS2 is a schematic diagram showing the printing section of the printing press, and Fig. 3 shows each printing device making up the printing section. Figure 4 is a perspective view showing an outline of the ink cartridge;
The figure is a sectional view thereof. 1... Printing department, 111-lln... Ink key, 2
1... Control unit, 31... Picture area ratio measuring device, 41
...Transmission line, 51...Printing plate. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) Measure the pattern area ratio of the printing plate in fixed width units, aggregate and store the measured pattern area ratio data in fixed width units for each printing plate, and when a transmission command is given, the stored pattern a picture area ratio measuring device that transmits area ratio data;
It is equipped with a control unit connected to the picture area ratio measuring device via a transmission line, and a printing unit in which the opening degrees of the plurality of ink keys are respectively adjusted by the output from the control unit,
The control section instructs the picture area ratio measuring device to transmit the picture area ratio data of the specified printing plate, and also transmits the picture area ratio data in fixed width units from the picture area ratio measuring device in accordance with the command. After receiving the data, convert it to image area ratio data in width units of the ink key of the printing section,
A printing system characterized in that an opening degree of an ink key of the printing section is set based on the converted data.