JP3120283B1 - Automatic cleaning method for printing press and automatic cleaning apparatus used in the method - Google Patents

Abstract

An object of the present invention is to make it possible to clean and remove a printing plate and an ink roll smoothly and neatly without using a cleaning liquid (even if a small amount is used). An automatic washing method for a printing press for removing waste ink from a printing plate and an ink roll of a plate cylinder, wherein the printing plate or the ink roll is rotated while the adsorptivity to the surface of the printing plate or the ink roll is increased. The cloth-like body having air permeability is opposed to the cloth-like body, and the cloth-like body is brought into close contact with the surface of a printing plate or an ink roll by sending compressed air to the cloth-like body. Adsorb and remove waste ink on the roll surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic cleaning method for a printing press and an automatic cleaning apparatus used in the method, and more particularly to a method for removing waste ink from a printing plate and an ink roll when printing is completed or when the ink used is changed. However, the present invention relates to an automatic cleaning method for a printing press and an automatic cleaning apparatus used in the method.

[0002]

2. Description of the Related Art In a printing machine, for example, a corrugated cardboard printing machine,
There are three types of printing presses referred to as Prislo, Flexo, and Closed Flexo. Looking at developments over time, flexo has emerged as a suitable printing machine for cardboard printing, which was initially started at Prislo, due to the need for mass production. However, this flexographic printing machine requires a large amount of labor and cost for its processing because a large amount of cleaning waste liquid used for cleaning the printing plate and the roll is generated at the end of printing or when the ink used is changed as described above. .

[0003] Closed flexo has improved these disadvantages and reduced the generation of washing waste liquid. The closed type flexo is a printing machine of a system for printing while adding or humidifying a small amount of ink without circulating the ink. Therefore, a small amount of cleaning liquid is required for cleaning, and a small amount of cleaning waste liquid of about 200 cc to 300 cc is required.

[0004] For these reasons, closed-type flexographic printing presses are now rapidly spreading. FIGS. 14 to 20 show a closed-type flexographic printing press, which is one of the printing presses.
And the cleaning process will be described. First, as shown in FIG. 14, ink is collected from the ink reservoir A into the ink tank 5 before washing. Anilox Roll 2
The cleaning liquid is injected between the rubber roll 1 and the cleaning liquid. The anilox roll 2 and the rubber roll 1 rotate while being in contact with each other and are washed. The generated cleaning waste liquid is scraped off by the ink cleaning doctor and accumulates in the waste liquid receiving gutter. At this time, since the printing plate 7 to which the ink has adhered is not in contact with the anilox roll 2 and the rubber roll 1, the attached ink remains as it is.

[0005] For these reasons, closed-type flexographic printing presses are nowadays widely available. FIGS. 14 to 20 show a closed-type flexographic printing press, which is one of the printing presses.
And the cleaning process will be described. First, as shown in FIG. 14, ink is collected from the ink reservoir A into the ink tank 5 before washing. Anilox Roll 2
The cleaning liquid is injected between the rubber roll 1 and the cleaning liquid. The anilox roll 2 and the rubber roll 1 rotate while being in contact with each other and are washed. The generated cleaning waste liquid is scraped off by the ink cleaning doctor and accumulates in the waste liquid receiving gutter. At this time, since the printing plate 7 to which the ink has adhered is not in contact with the anilox roll 2 and the rubber roll 1, the attached ink remains as it is. In the figure, reference numeral 4 denotes an impression cylinder, and 10 denotes a cardboard.

FIG. 15 is different from the printing press shown in FIG. 14 in that the rubber roller 1 is not provided, and the basic structure thereof is different. This is performed by the collecting means 17 by installing a roller and a doctor. The other basic configuration is the same as the embodiment of FIG.

FIG. 16 shows an anilox roll 2.
14 is basically the same as that of the embodiment of FIG.
Is different from the first embodiment in that the ink is collected by a collecting means 17 provided with a roller provided in contact with the ink and a scraper 6. The other basic configuration is the same as the embodiment of FIG.

FIG. 17 shows a circulating flexographic printing press. In particular, the drying speed is fast, the fixing speed of the printing ink on the surface of the printing plate 7 is fast, the printing is stopped, the ink is collected, and the ink is washed. This is one form in which it is required to carry out efficiently. The basic configuration is anilox roll 2
FIG. 14 shows that the cleaning liquid is injected between the
This is basically the same as the embodiment.

FIG. 18 shows another embodiment of a cyclic flexographic printing press, in which an impression cylinder is arranged at a higher position. The other basic configuration is basically the same as that of the embodiment of FIG. 14 such that the cleaning liquid is injected between the anilox roll 2 and the rubber roll 1.

FIGS. 19 and 20 show still another embodiment of a circulating flexographic printing press, which is a type in which a rubber roller is eliminated and only an anilox roll 2 is provided. is there.

[0011]

Even with the above-mentioned closed type flexo, as described above, 100 cc is required for one washing.
300 cc of washing waste liquid is generated. As in recent years, when a variety of products are produced in small quantities, the number of color changes in printing increases, and a washing waste liquid is generated each time. Also, even when using the same ink, it is often the case that only the printing plate is replaced.Each time, the printing plate with the ink attached must be removed and washed. Also, there is a problem in that clothes and surroundings are stained by handling dirty printing plates.

As a means for solving the problems relating to the cleaning of the printing plate and the roll, in addition to the above-mentioned method of using the cleaning liquid, in an offset printing machine, a cleaning cloth which is moved by a pressure pad is used. (For example, Japanese Patent Publication No. 4-58793 and Japanese Patent Publication No. 2904).
No. 481) and a technique of performing cleaning by spraying a cleaning liquid on a cleaning cloth instead of a pressure pad (for example, a conventional technique disclosed in Japanese Patent Publication No. 2867426).

In the former technique using a cleaning cloth, the above-mentioned problem of the cleaning waste liquid can be solved because no cleaning liquid is used. However, the cleaning cloth is transferred to the cylinder and the surface of the ink roll by a pressure pad that forms a substantially convex surface. Therefore, it is not possible to expect the cleaning cloth to conform to the fine irregularities on the printing surface or to wipe the corners of the concave portions neatly, leaving a problem that the cleaning and removing actions of the ink are insufficient. .

The latter method of spraying the cleaning liquid onto the cleaning cloth is not only inconvenient for the wiping action mentioned in this publication, but also because the liquid continuously jetted has a kind of rigid property. The ink collides with the cloth, and the transmittance that reaches the roll (cylinder) surface after passing through the cloth is small, and the speed at the time of permeation is significantly reduced. It is difficult to expect a floating action and a removing action. Conversely, a strong spray pressure causes the cleaning cloth to be pressed locally against the ink roll (cylinder) surface as if it were pressed by a pressure pad. The effect of cleaning to every corner by flexibly adapting to the fine irregularities forming the printing surface cannot be expected.

The present invention has been made in view of the problems in the prior art of such a series of closed-type and circulation-type flexographic printing presses, and is intended to smoothen a printing plate and an ink roll without using a cleaning liquid (even if a small amount is used). It is another object of the present invention to provide an automatic cleaning method for a printing press and a cleaning apparatus that can be used for the method, in which the cleaning and removal can be performed cleanly.

[0016]

According to the present invention, there is provided an automatic cleaning method for a printing press for removing waste ink from a printing plate and an ink roll in order to achieve the above object. While rotating the printing plate or the ink roll, the surface of the printing plate or the ink roll, having an absorptivity, and facing the air-permeable cloth-like body,
Means was adopted in which pressurized air was sent to the cloth to bring the cloth into close contact with the surface of the printing plate or ink roll, and to absorb and remove waste ink on the surface of the printing plate or ink roll.

In the method of the present invention, the cloth is preferably moved with respect to the surface of the printing plate or the ink roll. It is preferable that the cloth is wetted in advance, or a small amount of a cleaning liquid is used in combination with the printing plate or ink roll.

The automatic cleaning device for a printing press according to the present invention comprises:
In order to achieve the above object, an automatic washing device for a printing press for removing waste ink from a printing plate and an ink roll,
With respect to the printing plate or ink roll, a cloth-like body having adsorbability and having air permeability is disposed so as to be opposed to the printing plate, or from the side opposite to the printing plate or the ink roll. A means is provided in which nozzle means for injecting compressed air are provided, and compressed air supply means for sending compressed air to the nozzle means is provided.

In the apparatus of the present invention, it is preferable that the nozzle means is provided with a jetting direction switching means for changing a jetting direction with respect to the printing plate or the ink roll.

In the apparatus of the present invention, it is preferable that the nozzle means is constituted by a slit-shaped injection hole formed in a cylinder extending along the axial direction of the printing plate or roll.

Preferably, the nozzle means is constituted by a plurality of injection holes formed in a cylinder extending along the axial direction of the printing plate or the ink roll.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an ink roll is a roll to which ink usually adheres during printing, and includes an anilox roll and a rubber roll. The anilox roll includes a roll called a ceramic roll depending on a finishing material or the like. In the present invention, without using a cleaning liquid, pressurized air is blown from a nozzle to a printing plate or a cloth body opposed to an ink roll by means of compressed air supply means, thereby printing the printing plate. Alternatively, the waste ink on the surface of the printing plate or the ink roll can be adsorbed by pressure-adhesion to the surface of the ink roll. Therefore,
At the end of printing, when it is necessary to remove waste ink when changing colors, it is not necessary to use a washing liquid as in the past, or it is possible to avoid soiling of clothes etc. due to replacement of dirty printing plates. it can.

In particular, in the present invention, as shown in FIG. 1 to FIG. 4, by using an air-permeable cloth, the pressurized air from the nozzle is transmitted (not through the whole amount) to form the printing plate. By spraying the ink on the uneven surface, the ink accumulated at the corners of the uneven surface is lifted up, so that the ink can be easily attached to the cloth. In addition, since the compressed air inflates the cloth-like body and escapes from the pressure concentration part, the part from which the air escapes becomes a soft protruding state, and a state in which it is easy to adhere to the irregularities on the printing plate is obtained, The cloth-like body can adhere to the corners of the irregularities and wipe it off. It can demonstrate the familiar wiping action.

In the case where the cloth is moved relative to the surface of the printing plate or the ink roll, that is, when the cloth is wound into a band and the cloth is moved relatively, Since the new portion faces the surface of the printing plate or the ink roll, the wiping action of the waste ink can be always performed in a state of good adsorbability. Also, pre-wetting the cloth-like body, or using a small amount of washing liquid in parallel with the printing plate or ink roll, reduces the viscosity of the above-described waste ink and receives pressure air. In this case, the ink is easily released from the printing plate and the ink roll surface, so that the adsorptivity to the cloth is increased, and the washing efficiency is improved.

In the case where the nozzle for pressurized air jet is provided with jet direction switching means for changing the jet direction with respect to the printing plate or ink roll as in the apparatus of the present invention, rolls having different positions (anilox rolls) can be used. ) And the printing plate can be individually wiped, so that a single device can perform the wiping operation on both the ink roll and the printing plate. When the nozzle is constituted by a slit-shaped ejection hole or a plurality of ejection holes formed in a cylinder extending along the axial direction of the printing plate or the ink roll, the nozzle is moved with one cylinder. If the wiping action for the printing plate and the ink roll can be switched, it can be used. For example, it is not necessary to employ a means for arranging a plurality of nozzles and providing a complicated mechanism for switching the positions of the nozzles. Can be implemented.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A preferred embodiment of an automatic cleaning method for a printing press and an automatic cleaning apparatus used in the method according to the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 to 4, the structure of the main part of a printing machine of one embodiment used for printing the cardboard 10 includes a printing plate 7 facing the impression cylinder 4 arranged on the lower surface of the cardboard 10. A plate cylinder 3 is provided, and an anilox roll 2 is opposed to the printing plate 7 (plate cylinder 3).
A (ceramic roll) and a rubber roll 1 are arranged facing each other, and a required ink is stored in an ink storage section A between the two. The ink storage section A is configured so that ink can be supplied and ink can be recovered from the ink tank 5 (pressurized / depressurized) via a pump means.

A nozzle means 11 for blowing compressed air is provided opposite the anilox roll 2 and the printing plate 7 (plate cylinder 3). The nozzle means 11 has a structure in which a single slit 12a is formed in a cylinder 12 extending in parallel with the axial direction of the anilox roll 2 and the printing plate 7 (plate cylinder 3). The anilox roll 2 is provided so as to be swingable about an axis,
And the printing plate 7 (the plate cylinder 3), the positions thereof are two positions of a position corresponding to the anilox roll 2 and a position corresponding to the printing plate 7 (the plate cylinder 3). Injection direction switching means 15 capable of position switching and fixing
Is provided. This injection direction switching means 15
Here, as shown in FIG. 2, a support shaft 15a for supporting the arm 13 is rotatably held.
A bracket 15c for locking and fixing the notched operation arm 15b fixed to 5a at two positions is provided.

The nozzle means 11 is configured such that its conduit 11a is connected to the compressed air supply means 16 so that compressed air can be supplied therefrom. The compressed air supply means 16 is constituted by a pump or a blower driven by an electric motor, and a known means is used. And here, the compressed air is 0.5 kgf / cm ^{2 to} 5.0 kgf / cm ^2.
The pressure is appropriately set in consideration of the air permeability, such as the material of the cloth body 14 to be used, which will be described later.

The cloth body 14 is made of a cloth made of a material capable of absorbing water, that is, a material capable of adsorbing ink, here, a pulp-based nonwoven fabric.
A belt-shaped member is used and has sufficient air permeability, and is further wound around a winding roll at a predetermined speed by a cloth-like body feeding mechanism (known means). If necessary, a new cloth surface can be made to face the anilox roll 2 and the printing plate 7 (plate cylinder 3). The cloth-like body 14 may be made of any suitable material such as a cotton cloth or a synthetic fiber cloth as long as it has water absorbency and air permeability even if it is not the above-mentioned nonwoven fabric.

Therefore, at the end of printing or at the time of ink replacement, first, the ink in the ink reservoir A is collected in the ink tank 5 via the pump means, and thereafter, the anilox roll 2, the rubber roll 1, and the printing plate The washing and removal of the waste ink remaining in 7 is performed in the next step. First, while rotating the printing plate 7 and the anilox roll 2 at a low speed, the cloth-like body 14 having an absorptive property and an air-permeable property is opposed to the surface of the anilox roll 2 and is moved. Then, the compressed air from the compressed air supply means 16 is sent to the cloth body 14 through the nozzle means 11 to bring the cloth body 14 into close contact with the surface of the anilox roll 2, and as shown in FIG. As described above, the surface of the ankle roll 2 is made to adhere to the unevenness of the surface flexibly, and the ink in the concave portion is raised by the air pressure transmitted through the cloth-like body 14 and is adsorbed by the cloth-like body 14 located on the surface. In addition, FIG.
This shows a cleaning state when the cloth-like body 14 comes into contact with the printing plate 7, and the cloth-like body 14 fits and fits the unevenness of the printing plate 7 by wind pressure, and removes ink to every corner. What you get.

As a result, the ink on the surface of the anilox roll 2 and the ink on the rubber roll 1 rotating in contact with the anilox roll 2 are temporarily wiped off and washed. Similarly, the position of the nozzle means 11 is switched by operating the operation arm 15b of the ejection direction switching means 15, and the nozzle means 11 is directed to the printing plate 7 (plate cylinder 3), whereby the cloth 14 is moved. The cloth 14 is brought into close contact with the surface of the printing plate 7 by pressurized air, and does not float ink accumulated in the depressions on the uneven surface of the printing plate 7 by the transmitted compressed air. Is brought into close contact with the irregularities, and the ink accumulated there is wiped clean.

In carrying out this cleaning method, a method of pre-wetting the cloth-like body 14 or a cleaning step using a small amount of a cleaning liquid in order to dilute the retained ink to reduce the viscosity and facilitate wiping is performed. May be introduced. FIG. 5 shows an application example in which the above-described nozzle means 11 is disposed on the rubber roll 1 side opposite to the above-mentioned embodiment, and there is no change in the operation. The state body 14 can be switched between the rubber roll 1 and the printing plate 7.

(Second Embodiment) In the description of the first embodiment, a printing machine of the type in which the anilox roll 2 and the rubber roll 1 are arranged has been described. However, as shown in FIG. Needless to say, the present invention can be similarly applied to a type in which the plate cylinder 3 is opposed to the plate cylinder 3. This embodiment is basically the same as the above-described first embodiment except for the configuration in which the rubber roll 1 is omitted. Therefore, in order to avoid redundant description, other configurations (with member numbers) are described below.
The detailed description is omitted.

(Third Embodiment) This third embodiment is the same as the printing machine shown in FIG. 1 in that it is a printing machine of the type in which an anilox roll 2 and a rubber roll 1 are juxtaposed as shown in FIG. However, here, the type in which only the printing plate 7 is cleaned is described. Similarly, since the basic configuration is the same as that of the above-described first embodiment, detailed description of other configurations (with member numbers) will be omitted to avoid redundant description.
FIG. 8 shows the cloth-like body 14 in the type of FIG.
Shows a state in which the ink comes into contact with the anilox roll 2 to clean the ink.

(Fourth Embodiment) This fourth embodiment is the same as the printing press shown in FIG. 1 in that it is a printing press of the type in which an anilox roll 2 and a rubber roll 1 are juxtaposed as shown in FIG. However, here, only the printing plate 7 is cleaned, and a roller is attached to the anilox roll 2 so as to be opposed to the anilox roll 2 (to be able to come in contact with and separate from the anilox roll), and a collecting means 17 provided with a doctor is provided. The above-mentioned type is designed to collect the ink. FIG. 10 shows that cleaning of the anilox roll 2 and the printing plate 7 can be performed by switching in the above type. In this case, as shown in FIG. 11, the nozzle means 11 and the like can be provided on the side of the rubber roll 1 so that the rubber roll 1 is also cleaned.

(Fifth Embodiment) This fifth embodiment is similar to the fifth embodiment shown in FIG.
As shown in the figure, this method shows only the method of cleaning the printing plate of the circulating flexographic printing press. In particular, the drying speed is fast, the fixing speed of the printing ink on the surface of the printing plate 7 is high, the printing is stopped, the ink is collected, and the cleaning is performed. At the same time, the printing plate is washed by the means of the present invention. In this embodiment, the basic configuration is substantially the same as that of the first embodiment except that a pump P and the like necessary for the circulation function are provided, and only the printing plate 7 is washed and cleaned. Therefore, a detailed description of each component configuration (with numbers) is omitted here. still,
FIG. 13 shows a printing press of the same type as that of FIG. 12, but in a state where the cleaning target can be switched between the anilox roll 2 and the printing plate 7.

[0037]

According to the present invention, even when a cleaning liquid is not used, a pressurized air is blown against a printing plate or a cloth-like body opposed to an ink roll, whereby the cloth-like body is printed or printed. It can be pressed against the surface of the ink roll to absorb the waste ink on the surface of the printing plate or ink roll by its adsorptivity. There is an advantage that generation of unnecessary washing waste liquid and post-treatment thereof become unnecessary, or soiling of clothes and the like accompanying replacement of a dirty printing plate can be avoided.

In particular, in the present invention, by using an air-permeable cloth, the pressurized air from the nozzle is transmitted (not completely passed) and blown onto the irregular surface of the printing plate, and is applied to the irregular corners. The accumulated ink can be raised to make it easy to adhere to the cloth, and in addition, the compressed air expands the cloth and escapes from the pressure concentration area, so that the air escape part is a soft protrusion In this state, it is possible to obtain a state in which it is easy to adhere to the irregularities on the printing plate, and the cloth-like body can be in close contact with the corners of the irregularities to perform the wiping action, thereby improving the wiping efficiency. Also exist.

Further, the present invention is adopted for both the circulating flexo and the non-circulating flexo of the conventional method, so that the cleaning of the printing plate and the cleaning and adsorption of the residual ink between the ink rolls can be effectively performed. Other specific effects of the present invention are as described in detail in the section of the embodiments and the examples of the present invention.

[Brief description of the drawings]

FIG. 1 is an overall schematic front view of an automatic cleaning method for a printing press and an automatic cleaning apparatus used in the method according to the present invention.

FIG. 2 is a perspective view of a main part of the automatic cleaning device according to the present invention.

FIG. 3 is a vertical sectional side view of a main part showing an example of a cleaning action according to the present invention. is there.

FIG. 4 is a longitudinal sectional side view of a main part showing another example of the cleaning action according to the present invention.

FIG. 5 is an overall schematic front view showing an application example of the automatic cleaning device according to the present invention.

FIG. 6 is an overall schematic front view showing another embodiment of the automatic cleaning device according to the present invention.

FIG. 7 is an overall schematic front view showing still another embodiment of the automatic cleaning method for a printing press and the automatic cleaning apparatus used in the method according to the present invention.

FIG. 8 is an overall schematic front view showing an application example of another embodiment of an automatic cleaning method for a printing press and an automatic cleaning device used in the method according to the present invention.

FIG. 9 is an overall schematic front view showing still another embodiment of the automatic cleaning method for a printing press and the automatic cleaning apparatus used in the method according to the present invention.

FIG. 10 is an overall schematic front view showing an application example of another embodiment of the automatic cleaning method for a printing press and the automatic cleaning device used in the method according to the present invention.

FIG. 11 is an overall schematic front view showing an application example of another embodiment of the automatic cleaning method for a printing press and the automatic cleaning device used in the method according to the present invention.

FIG. 12 is an overall schematic front view showing still another embodiment of the automatic cleaning method for a printing press and the automatic cleaning apparatus used in the method according to the present invention.

FIG. 13 is an overall schematic front view showing an application example of another embodiment of the automatic cleaning method for a printing press and the automatic cleaning device used in the method according to the present invention.

FIG. 14 is an overall schematic front view showing one embodiment of a conventional automatic cleaning apparatus.

FIG. 15 is an overall schematic front view showing one embodiment of a conventional automatic cleaning apparatus.

FIG. 16 is an overall schematic front view showing one embodiment of a conventional automatic cleaning device.

FIG. 17 is an overall schematic front view showing one embodiment of a conventional automatic cleaning device.

FIG. 18 is an overall schematic front view showing one embodiment of a conventional automatic cleaning device.

FIG. 19 is an overall schematic front view showing one embodiment of a conventional automatic cleaning device.

FIG. 20 is an overall schematic front view showing one embodiment of a conventional automatic cleaning device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rubber roll 2 Anilox roll (ceramics roll) 3 Plate cylinder 4 Impression cylinder 5 Ink tank 6 Scraper 7 Printing plate A Ink storage section

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-229108 (JP, A) JP-A-10-6482 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41F 35/02 B41F 31/20 B41F 35/04

Claims (8)

(57) [Claims] An automatic cleaning method for a printing press for removing waste ink from a printing plate and an ink roll of a plate cylinder, wherein the printing plate or the ink roll is rotated while the surface of the printing plate or the ink roll is rotated. Having a suction property, and facing a cloth-like body having air permeability, sending compressed air to the cloth-like body to bring the cloth-like body into close contact with the surface of a printing plate or an ink roll, An automatic cleaning method for printing presses that absorbs and removes waste ink on the surface of a printing plate or ink roll. 2. The method according to claim 1, wherein the cloth is moved with respect to the surface of the printing plate or the ink roll. 3. The method according to claim 1, wherein the cloth is wetted in advance.
Automatic washing method of printing machine. 4. The automatic cleaning method for a printing press according to claim 1, wherein a small amount of cleaning liquid is used in parallel with said printing plate or ink roll. 5. An automatic cleaning device for a printing press for removing waste ink from a printing plate and an ink roll of a plate cylinder, wherein said printing plate has an adsorbing property and air permeability to said printing plate or ink roll. A nozzle means for injecting compressed air from the opposite side of the printing plate or the ink roll to the cloth body, and applying compressed air to the nozzle means. An automatic cleaning device for a printing machine equipped with a compressed air supply means for feeding. 6. An automatic cleaning device for a printing press according to claim 5, wherein said nozzle means is provided with a jetting direction switching means for changing the jetting direction with respect to said printing plate or ink roll. 7. The automatic cleaning device for a printing press according to claim 5, wherein said nozzle means is constituted by a slit-shaped injection hole formed in a cylinder extending along the axial direction of said printing plate or roll. 8. The automatic cleaning device for a printing press according to claim 5, wherein said nozzle means is constituted by a plurality of injection holes formed in a cylinder extending along the axial direction of said printing plate or roll.