JPS6248555A - Control of density in temporary stoppage of printing in printer - Google Patents

Abstract

PURPOSE:To keep the density of printing constant even when printing is temporarily stopped by a method in which a pressure cylinder is separated from a transfer cylinder after ending printing of up to the final region of paper, and at the same time an inking roller is separated from the transfer cylinder. CONSTITUTION:A pressure cylinder 11 is first separated from a blanket cylinder 2, and at the same time an inking roller 7a is separated from a plate cylinder 3 to stop the supply of ink to the cylinder 3. Under this condition, the cylinders 2 and 3 are about half-turned, and ink 31 for printing the next page on the plate wound around the cylinder 3 is transferred to the cylinder 2. By pause-in treatment, ink 31 for printing one page is transferred to the cylinder 2 and also by pause-out treatment, printing is made by the ink 31 for first one paper after restarting of printing and the process is moved to a regular printing. Therefore, the density of printing before the pause-in treatment and that after the pause-out treatment can be kept identical.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a printing stop density υ+611 method in a printing press for an offset printing press and letterpress printing press.

(Conventional technology and its problems) In conventional printing machines such as A-set printing machines and letterpress printing machines, when printing is temporarily stopped for paper replacement or printing 111 degree confirmation, the printing is not the same as before the printing was paused. There was a problem in that the printing mci fluctuated greatly after the middle column was restarted, resulting in printing defects.

(Object of the Invention) This invention was made to solve the above problem.
Printing pause 11 in a printing press that can keep the mark 61 'Q melon constant after restarting! The purpose of this invention is to provide a method for controlling the temperature.

(Means for Achieving the Object) In order to achieve the above object, the printing pause density control method in a 1IIL1 machine of the present invention is composed of a pause-in and pause-out process. If a pause-in command is given during printing,
In response to the pause-in command, printing is finished up to the 1u end T4 area of the page, and the impression cylinder is released from the transfer cylinder from -C, and in synchronization with the impression cylinder release timing, simultaneously or for one page. This is a process in which the ink adhesion roller is separated from the transfer cylinder at an early timing.Also, in the pause-out process, when a pause-out command is given after a pause-in command, the page is removed in response to the pause-out command. Printing is 1 from the tip position
11, the impression cylinder is released from the transfer cylinder 11 and paper feeding is restarted, and at the same time, the ink forming roller is moved to the transfer cylinder one page earlier. It is a culm that is embellished.

(Example) FIG. 1 shows a schematic cross-sectional view of a multicolor offset printing machine that is capable of printing on continuous paper. As shown in the figure, printing 6
1 A plank 1-drum 2 is arranged approximately in the center of the main body 1,
At the lower rear position and the lower rear position of the plank 1-cylinder 2, the separation cylinder f[na plate cylinder 3,
4 are arranged respectively.

At the rear position of these plate cylinders 3 and 4, there are corresponding 46 plate cylinders 3 and 4.
11th edition that allows automatic payment fI version to 'Nira 1-5.
(Inking tips 1-7 for applying ink to the plate written in Volume 1, Correspondence-46 version 1143.4.
8 is removably attached, and supply plates 1-lays 9, 10 are detachably attached to each supply J1 plate connit 5, 6.

On the other hand, at the lower front position of the blanket cylinder 2, there is a cylinder that can be freely attached and detached from the Planktsu l-11J 2.
are arranged at the rear and front positions of the lower part of the impression cylinder 11, and the pin feed 1-actuator 13 and suction for feeding the paper of the series vcftt 12 passed between the impression cylinder 11 and planks I-11J 2 by 91w are provided. A conveyor 14 is provided respectively. These bin feed tractor 13 and suction conveyor 14 are connected to the impression cylinder 11 and one rank I-ISm2.
It is configured such that printing is performed on the continuous paper 12 by controlling the paper feed of the continuous paper 12 in intermittent steps in conjunction with the timing of the lf drum loading. In addition, in the front position of the printing press body 1, there is a folding machine 17 that has a swing guide 15 for storing the printed continuous paper 12 in an alternately folded manner and a continuous paper tray 16 that can be raised and lowered. It is located. Furthermore, an impression cylinder cleaning unit 29 is provided below the impression cylinder 11 to remove dirt from the surface of the impression cylinder.

In addition, at the upper front position of the blanket 2, a cleaning liquid supply unit 18 for supplying cleaning liquid to the planters 1 to II 2 and a wiping unit 19 for wiping off the cleaning liquid are attached and detached. It can be installed freely.

A main motor 20 is installed in the lower space of the main body 1 of the printing unit 1, and connects the planks 1 to cylinders 2 and the suction conveyor 14.
is driven by the main motor 20 via the bell l-'1, for example, and the blanket 1 cylinder 2 and plate l113
．． 4, pressure I11, 11, and tJ are mechanically interlocked by a gear V disposed so as to mesh with one end of these eight cylinders, thereby providing a drive system including the main upper and lower cylinders 20. For the remaining mechanical parts, e.g. pulse [
- Drive equipment such as actuator and solenoid 'Fl':; Ishiha is equipped with an actuator, and sensors 9 and switches are installed at predetermined necessary locations as information input means for controlling the drive timing of these drive systems. It is installed.

FIG. 2 schematically shows the control system 1 used in this printing press.
8 is connected. The system program is stored in an external storage device 24, such as a floppy disk, and is provided to the microprocessor 21 at the beginning of system startup. The operator gives commands through the operation control panel 25 installed on the side of the printing press, and the microphone 1] input unit 721 takes in the necessary 4ν information from the sensor 9 and switches 26 and 27 (and controls the motor according to the system program). The drive system 28 such as a solenoid is operated as appropriate.

In this type of printing press, the ink power production control 2II operations performed at 11 at the start of printing, at the time of stopping printing, and at the end of printing will be described below.

FIG. 3 shows that when, for example, the mark 11iQ start key on the operator panel 25 (FIG. 2) is pressed by the A verator and a print start command is given ("i"), the microprocessor 21 ( It' in Figure 2) is approximately 0
This is a flow plate showing one work. This printing start command is issued when the plate cylinders 3 and 4 and the liquid lubricant 111 are in the female position with respect to the first cylinder cylinder 2, and the sixth cylinder is rotationally driven by the main cylinder 2 at -920. In this case, the rotational speed of cylinder 6 is such that the peripheral speed of impression cylinder 11 and plate +1i3.4 are equal to the peripheral speed of blanket Ijm2, and the rotational speed of cylinder 6 is equal to the peripheral speed of blanket Ijm2, and , 8 are set so that the circumferential speeds of the ink application rollers 7a, 8a are equal.

When the above print start command is given, first step S1
The version is exchanged at . That is, version 1113.
The previous printing plate wrapped around 4 passes through feeding plates 1 to 5 and 6 to the feeding plate tray 9.10 group plate +
1? 9 a + 10 a, and instead of the above-mentioned plates, the plates for the current printing scheduled to be placed on the plate feeding tables 9 b and 10 t of the plate feeding and discharging trays 9 and 10 are passed through the feeding plate unit 5.6. Then, roll it onto plate 1143.4 (4LJ).

When the plate exchange is completed, the process proceeds to step S2, and the plunket cylinder 2 is cleaned. That is, the cleaning liquid is supplied to the planks l-Ill 2 by the cleaning liquid supply unit 1-18.
When the ink adhering to the cylinder 2 is supplied to the planks 1, it is wiped off together with the above-mentioned cleaning liquid by the cylinder 1-1.
It is wiped away by 9.

Next, the process advances to step $3, and printing processing is executed. The purpose of this printing process is to rapidly converge the density change at the time of printing and make it constant, and it consists of the steps shown in FIG. 4. In FIG. 4, only one plate cylinder 3 is shown, and the illustration of the other plate cylinder 4 is omitted. Since the operation of the plate cylinder 4 is the same as that of the plate cylinder 3, only the plate cylinder 3 will be explained below, and the explanation of the plate cylinder 4 will be omitted. In addition, the plate cylinder 3 and Planckz 1-cylinder 2 are
In reality, considering the automatic feeding and discharging plate, -ffi+ of the circumferential body is 1
) The mouth is closed in step C, but it is open [4 fish in this part are in 4
Since it does not have any essential influence on concentration control, the explanation will be given below in 1. for convenience of explanation 't5'i and 1J without illustration of the opening. In addition, in the drawings from Figure 4 onwards, the flow of the three inks (ink for printing) is represented by thick line areas, and the remaining ink transferred to other cylinders or Get paper is represented by broken lines. Let's say Tsub.

In the printing process, first, the inking process shown in FIG. 2(a) is performed. This inking process is performed using ink B <Noro-
This is done by inking only the rough a onto the plate cylinder 3, and this process is carried out while the plank cylinders 1 to 2 rotate several times. This means that the drawing area of version-1- is multiplied by in4:U,
This is because it takes several rotations to remove the ink from the first drawing area.

As a result, the plate IN 3 J: has b more in! than in the case of regular printing. =30 will be supplied.

4, 17. Since this fleshing culm is done with the blunt foot cylinder 2 and plate cylinder 3 separated, it is recommended to perform it in parallel with the plumket cylinder cleaning process shown in step S2 in Fig. 3. It may be configured as follows. With such a configuration, the time required for printing can be shortened.

When the inking step is completed, the process proceeds to the transfer step shown in FIG. 4(b). This transfer T culm is performed by transferring the plate Ii3 to the blanket y2, and
- [Executed only during one rotation of i12. As a result, more ink 30 than the regular printing port is applied to plate 1!1.
It will be transferred from the plate on 3 to Plankts t-In 2.

Next, the first printing [f? to go into.

This printing process consists of: 1) separating the ink layer 7a from the plate cylinder 3 and stopping the supply of ink 30 to the plate Ji 43;
On the other hand, the press 1111 is transferred four times to the blanket cylinder 2, and printing is performed by feeding the continuous paper 12 one page in the direction of arrow A. period, which causes the blanket l112
Suppose that ink 430 of No. 1 is transferred to the continuous wh12, and printing for one page is performed with a higher density of in-F than during regular printing. The in 2V of the plate 10 is transferred to the plate 1-cylinder 2 at a predetermined ratio, and the plate and plank cylinder I-f) m
Each of the two soil ink products is adjusted to ink during regular printing: skewer.

Once the second printing process is complete, continue as shown in Figure 4(d).
The second printing process (regular printing introduction process) shown in FIG. In this second printing process, ink: I n IJ r+ - rough a is applied to the plate cylinder 3 and the supply of in F30 to the plate cylinder 3 is restarted, and the series VL [12 is printed for one more page. send and print. This first printing is also a blanket Jj
During the period when i2 rotates once, 4-J is executed, and the ink V on cylinders 1 and 2 is transferred to the continuous paper 12, and one page's worth of ink is printed with the same ink density as during regular printing. At the same time, the printing cylinder 3 is placed on the blanket cylinder 2.
A skewer of ink equal to the amount supplied during regular printing is replenished from the upper plate, and the plate Ii3 is replenished with ink equal to the amount supplied during regular printing from the inking roller 7a.

In this way, in1=ffi on each II is adjusted to in+f' during regular printing.

In this way, in this printing process, first, the in which is frequently used for upstream b during regular printing is supplied onto the plate, and then printing is performed with the supply of in 4- to the plate cylinder 3 being stopped. Planktsu l-1142 3-inch printing on 4m plate +
Since the adjustment is made to the state of 15, it is possible to shift to regular printing in a short time, and the number of sheets lost until the density stabilizes at 1" at the beginning of printing is extremely low (t) 1 sheet, and the performance is good. It's spot on.

When the above-mentioned unloading process is completed, the process advances to step S4 as shown in FIG. 3, and the process shifts to regular printing.

This steady printing is performed by transferring 1 in. 1 corresponding to the vertical length of the paper transferred to planks 1 to tf42 to the continuous paper 12, and then moving the impression cylinder 11 away from the plank cylinders 1 to 2. Paper feeding of the continuous paper 12 is stopped to avoid temporary interruption of printing. Then, when the middle part of the blanket cylinder 2 faces the impression cylinder 11, the impression cylinder 11 is placed in the blanket 112, and paper feeding of the continuous paper 12 is resumed.
Execute printing. In this way, Planckz 1 - Trunk 2 becomes 1
Each time it rotates, the cylinder 11 is moved in and out of the cylinder, and the continuous paper 12 is controlled intermittently one page at a time in relation to the timing of the movement of the cylinder, and each page of the continuous paper 12 is sequentially
Perform printing. At this time, in1: wearing [] - rough a,
The plate 113 and blanket 112 remain in line with each other.

During this regular printing, each time a page is overprinted, for example, one page is printed, it is determined in step S5 whether or not a pause-in command has been given by the operator. This pause-in command is issued, for example, by the A verator pressing pause-in -1'' on the operation panel 25 (FIG. 2).

If the pause-in command has not been received, the process advances to step S6, where the number of printed sheets is 1 greater than the set number of sheets inputted in advance from the A peripheral panel 25 (FIG. 2).
It is determined whether or not the number of fewer sheets has been reached, that is, (the set number of sheets - 1). If the number of printed sheets has not reached (set number of sheets - 1), the process returns to step S4 and normal printing is continued, and the operations described above are repeated until the number of printed sheets reaches (set number of sheets - 1) sheets. .

In this way, when regular printing is performed for (set number of sheets - 1) sheets, the process advances from step S6 to step S7, and printing end processing is executed. This printing end process is performed in the f order shown in FIG. However, in the state of regular printing shown in Figure (a), first, as shown in Figure (b), (
Setting sheet y! 1. -1> When the printing of the page corresponding to the 1st page is completed, the roller 7a of the ink stone is separated from the plate cylinder 3 (Inni 1 GJ r Cola separation cylinder T culm). At this time, the supply of ink from the reroller 7a to the plate cylinder 3 is stopped.Then, while printing continues,
When it has rotated approximately ゛, that is, it has been wound to the plate +113 (
-j The main ink on the kerbed plate is Planckz l-11
2, the plate cylinder 3 is moved from the blanket Ij12 to 11111111 as shown in FIG. 2(C). As a result, the plate cylinder 3 has 35. ! Only a small amount of ink will remain on the marked plate. After that, when Planckz cylinder 2 has rotated about 1' more, if it is -4, then blanker 1 - cylinder 20. The main inn 1- is Okizokushi 12
When the transfer is completed, the impression cylinder 11 is moved away from the blanket cylinder 2 as shown in the same figure ((j).
11). This leaves only a small amount of ink on the Plankera t-Ill 2. In this way, the end-of-printing process shown in FIG. Become. In this case, the main ink flow for printing the final page is the same as in the case of regular printing, so the final page can be printed at an ink density of 4", which is the same as the ink density for regular printing, and the waste paper Do not emit 1.

If this end-of-printing process is executed, the amount of ink left on the plate and blanket cylinder 2 can be reduced compared to when cylinder 8 is immediately disconnected and printing is stopped in the steady printing state shown in Figure (a). Therefore, the plate can be easily removed later, and the blanket cylinder 2 can also be easily cleaned. However, by setting the inking 1 coat 57a, the printing plate 1113, and the 111i cylinder timing of the impression cylinder 11 as described above, the ink 1" density, which is equal to the ink 1 density during regular printing,
You can print the i=last page manually and prevent paper waste.

When the printing process is completed in this way, the process advances to step S8, where a duplicate printing process is performed. This plate discharge is performed by discharging the plate wound around the plate cylinder 3 onto the plate table 11 of the plate supply/discharge tray 9 by the plate supply/discharge unit 5. Next, in step S9, the plunger cylinder 2 is cleaned in the same manner as in step S2, and the entire printing operation is thus completed.

By the way, during regular printing, I am in J3, and I am not able to change the paper or print a.
If it is desired to temporarily stop printing due to Iff f11r recognition or the like, the operator can issue a pause-in command by pressing, for example, "1" on the pause-in button on the operator control panel 25 (FIG. 2). When the pause-in command is received, it is determined in step S5 that there is a pause-in command, and the process proceeds to step S10, where the pause-in process shown in FIG. 6, for example, is executed.

This pause-in process is performed when a pause-in command is given in the steady printing state shown in FIG. ) After finishing printing all the pages at point ), as shown in FIG. 1i1J will be canceled. Then, at the same time as this printing is stopped, the in-titj roller 7
A is separated from the plate cylinder 3, and the supply of IN-1- to the plate IN 3 is stopped] 1: Turn off. In this state, Planchera)-I
N 2 and the plate cylinder 3 are rotated about half a turn, and the in 431 for the next page to be printed on the plate wrapped around the plate cylinder 3 is transferred to the Plancher I-I.
II 2, and at point H5 after the transfer, the same figure (C
), cut the plate 113 from the blanket cylinder 2. As a result, one page of printable in 4 is transferred onto Plankera l-1172.

In this way, when the pause-in process is completed, Fig. 6(C)
In other words, the eight cylinders continue to rotate while being separated from each other, and proceed to a so-called pause state (step 511). This pause state continues for five times (step 811.12) until the operator presses, for example, BOSEAR 1-F- on the operating panel 25 (FIG. 2) and the BOSEAR 1- command is returned.

When a pause out command is given in the above pause state, it is determined in step 812 that there is a pause out command, and the process proceeds to step 313, where the pause out process shown in FIG. 7 is executed. This pause-out process is shown in the same figure (
When J3 is in the pose state shown in a) and the rotational position of the blanket 12 reaches the predetermined printing start position 8, the impression cylinder 11 is moved from the plancher 1 to the cylinder 2 as shown in FIG. 6 cylinders, paper feeding is resumed, and printing by the in-131 of the blanket IM 21 is started. On the other hand, Tan1
The ink roller 7a is applied to the plate cylinder 3 in synchronization with the n-cylinder timing of ¥411, and the ink for the next page printing is applied onto the plate wrapped around the plate cylinder 3. Supplied.

In this state, after rotating the plankeller 1-1B12 and the plate cylinder 3 approximately 100 degrees, the plate cylinder 3 is attached to the blanket cylinder 2 as shown in the same figure (C), and the ink is transferred to the plankeller 1 onto the cylinder 2. After 31, in 4-32 for printing the next page is transferred. In this way, the blanket ■2 and the plate cylinder 3 are rotated about half a turn again to finish printing one page.
~The process is completed, and as shown in FIG. 3, the process returns from step 13 to step S4 and shifts to regular printing.

In this way, the ink 31 for printing one page is transferred to Planckz I-1112 by the pause-in process, and the first page of printing - ■ indirect is printed using the ink 431 by the pause-out process. Since we are trying to shift to -C steady printing, before pause-in and Bose error +-1*
It is possible to maintain the same printing density. In order to print 1 m again on continuous paper 12 after printing 11 meters in the middle, such processing is indispensable.

Note that for the pause-in processing and pause-out processing, in addition to the methods shown in FIG. 6 J3 and FIG. 7, for example, the method shown in FIG. 8 and the '1J'JJ method shown in FIG. 9 can be considered.

First, the serial control method shown in FIG. 8 will be explained. The same figure (a
), (b), and (C) show the pause-in processing, and the same figure (d) and <0) do not show the pause-out processing. Now, one evening later, in the steady printing state shown in Figure (a), a pause-in command is issued! jλ, the main ink 133 for printing the page when the pause-in command was given has finished being transferred from the plate cylinder 3 onto the blank cylinder 2, and as shown in FIG.
), the plate cylinder 3 is increased from 1 rank l-, ¥42 to l1llil. As a result, the above-mentioned ink "33" is transferred to the blanket 112, and the 1° ink "i:34" for printing the next page remains on the plate cylinder 3 side. After the
fEI port 11 all 11 shoes 1-(to port 2 n II sit
In this state, the paper feed of the continuous paper 12 (1 means that page printing with the ink 33 will continue).
6 cylinders are placed on top of the plate cylinder 3, and the in 1-34 is supplied to the plate surface 10 which has been valleyd Gj on the plate 1f13.

In this way, when page printing by the printer 433 is completed, as shown in FIG.
From #torso 1! , Ii''i1, the paper feed of the continuous paper 12 is ff' f and printing is stopped. The -h'c,
At the same timing as the female impression cylinder 11 (1ll), at the same time as the #i cylinder, the ink forming roller 7a is moved from the plate cylinders 3h to 3h, and the supply of ink to the printing plate is stopped.

As a result, one page of ink F-34 for printing the next page is transferred onto the printing plate 2 wound around the printing cylinder 3.

When this pause-in process is completed, the state shifts to a pause state in which the state shown in FIG.

Next, when a pause-out command is issued in the above-mentioned pause state, the plate 113 is moved to the planks l-] cylinder 2 when the leading position of the printing plate wrapped around the printing plate IM3 (page top position 4) faces the blanket cylinder 2. The same figure (d)
As shown in FIG. In this way, the blanket cylinder 2 rotates about half a turn, and when the head of the main ink t34 transferred onto the plank cylinder 2 rotates to a position where it faces the impression cylinder 11, as shown in FIG. , the impression cylinder 11 is moved to the planks cylinder 2, and at the same time, feeding of the continuous paper 120 is started, and printing is resumed. As a result, printing by the in-V34 is restarted. Also, 1 in at the same time as the above pressure 'ff4110 torso! : The application roller 7a is pressed to the plate IN 30 1! There is a roar as the In V is replenished.Thus, the seven pauses I~ are completed, and the process shifts to regular printing.

In this way, the pause-in process described above can be applied to the main ink 33 with the same flow as that of steady printing, and in other words, it can be printed with the same flow as that of steady printing. In addition, if you perform the above-mentioned Bose Arara 1~ processing, the flow of the main input V34 will be changed to the steady printing state and printing will be resumed. , pause printing + print if
It is important to keep the J marks equal.

Next, the control method shown in FIG. 9 will be explained.

Figures (a), (b), (c), and (d) show pause-in processing, and Figures (Q), (f), and (tJ) show pause-out processing.

Now, if J3 is in the steady printing state shown in (a) of the same figure and a pause-in command is given, when the printing of the page at which the pause-in command was given is completed, the state shown in (b) of the same figure is displayed. , the roller 7a is moved from the plate cylinder 3 to the full cylinder. This allows for in 4 wear [1-rough a to version 1
The supply of ink to 1i3 is stopped.

Next, with plate 1113 J3 and 4 pages left on cylinder 20 of plate 1; The main inn 135 of the straw plate cylinder 30 is Prangz l-cylinder 2.
When the transfer is completed, transfer plate 11 as shown in the same figure (C).
Then, when the plunger cylinder 2 has rotated about 71 more times, the main ink 35 of the straw blanket cylinder 2-L is applied to the straw blanket cylinder 2-L.
When the image has been transferred onto the continuous paper 12, the pressure 11111 is applied from the blanks 1 to In 2 as shown in FIG. cancel it. In this way, the pause-in process shown in FIG. This pause-in process is the same as the end-of-printing process shown in FIG.
The printing of a page is the same as the ink of the regular printing and the ink is 2%f.
It can be done in 1 repeat.

When this pause-in process is completed, the state moves to a pause state (j) that maintains the state shown in FIG.

Next, in the above pose state, pause out 11? When a command is given, as shown in the same figure (C), the leading position (true leading edge position) of the printing plate wrapped around the printing cylinder 3 is adjusted to the position where the ink is deposited.
When facing the T roller 7a, the in-F care roller 7a is moved to PjHR on the plate cylinder 3. As a result, the ink 36 for printing the next page is supplied to the plate surface F which is wound around the plate cylinder 3 (-1iJ).

Then, when the plate 1 $13 has rotated about half a rotation, the beginning of the in F36 transferred to the straw plate jR3 is at the plankz l-
At the point when it rotates to the position facing 1 and 2, the same figure ([
) Place the plate IW 3 on the planks 1-2 cylinder as shown. As a result, the ink 36 for printing the next page is applied to plate I.
ll/J' will be transferred to the blanker 1-cylinder 2. After that, the blanket body 2 is further approximately ”!4 @
At the point when the leading edge of the ink 36 transferred to the straw blanket cylinder 2 faces the 11th cylinder 11, the straw blanket 11 is placed on the blank 1-1 and 2nd, and at the same time, the straw blanket cylinder 2 is continuously Paper feeding of the paper 12 is started and printing is restarted. As a result, printing by the in 436 is performed for i'j'. When the pause-out process is ended in this way, the process shifts to regular printing.

In this way, if the above pause-in processing is performed <E, then the same flow as in the case of steady printing can be printed on the ↑ barrel ink 35 in 6 digits, and in other words, printing is performed at the same density as in steady printing and the pause state is reached. In addition, if the Bose 7 out process is performed, printing can be restarted with the main ink 36 flow in a steady printing state, so the print density after restarting printing and the printing before the previous stop The concentration can be kept equal.

In addition, in each of the above-mentioned examples of printing start processing, printing end processing, and pause processing, in J3, A7t! Ink density control is explained using a jet printing machine as an example, but this invention
In addition to A-noset printing, it is also applicable to printing machines such as letterpress printing machines and lithographic direct printing machines. In this case, the transfer cylinder is composed of the plate cylinder and the blanket cylinder in A printing mode 1 to printing mode, but in letterpress printing machines and flat Rfitl printing machines, the transfer cylinder is composed only of the plate cylinder. becomes.

(Effects of the Invention) As described above, according to the printing pause density control method in printing 1 of the present invention, printing up to the final area of the page is completed in response to the pause-in command given during normal printing operation. Then, rotate the II II from the '/1' cylinder and pause the paper feed, or synchronize with the timing of the use of that impression cylinder, and import at the same time or one page earlier. 1. In response to the command, transfer the low cylinder II so that printing starts from the leading edge area of the page. : W 114 to restart the paper feed, synchronize with the 6th cylinder timing of the former impression cylinder, V, synchronize again (, L1 page early timing, 1 person [)] to the transfer cylinder. To avoid this, pause the printing [in case of 6, pause printing before F and resume printing 1; i! With ff2, the effect of keeping the print density constant is increased by 1!7.

[Brief explanation of the drawing]

Figure 1 is a schematic sectional view of a printing press as an example to which the present invention is applied, Figure 2 is a schematic diagram of the control system used in the printing press, and Figure 3 is a schematic diagram of the control system used in the printing press. 7' Flow 1/-
4 is a diagram showing the general operation of the printing process, FIG. 5 is a diagram showing the general operation of the printing end process, and FIG.
Figure 7 is a diagram showing a schematic operation of Bose Ala1-C as an example of the pause-in process, and Figure 8 is another example of the pause-in process. 13
and FIG. 9 is a diagram showing a schematic operation of another pause-in process and a pause-out process. 2... Planchera 1-cylinder, 3... Plate cylinder,
7a... Ink formation roller, 11... Impression cylinder, 12... Continuous paper

Claims (1)

[Claims] (1) The ink form roller and the impression cylinder are configured to be able to be freely separated from the transfer cylinder, and with the ink form roller and the impression cylinder mounted on the transfer cylinder, the continuous paper passed between the impression cylinder and the transfer cylinder is This is a printing pause density control method for a printing press that performs steady printing by moving the impression cylinder from the transfer cylinder in response to a pause-in command and after finishing steady printing up to the final area of the page. A pause-in process in which the ink form roller is released from the transfer cylinder and the paper feed is temporarily stopped by releasing the cylinder, and the inking roller is released from the transfer cylinder simultaneously or one page earlier in synchronization with the timing of releasing the impression cylinder, and in response to a pause-out command. In response, the impression cylinder is mounted on the transfer cylinder and paper feeding is restarted so that printing starts from the leading edge area of the page, and the paper feed is restarted simultaneously or one page earlier, in synchronization with the impression cylinder's mounting timing. A printing pause density control method in a printing press, including a pause-out step of placing an ink form roller on a transfer cylinder at a timing.