JPH04361044A - Method and device for ink supply and method and apparatus for intaglio printing - Google Patents

Abstract

PURPOSE:To make supply of ink in proper quantities to available area on an intaglio, namely a printing area, without troubling an operator, and to make thereby economical use of the ink available on an occasion of supplying the ink to the intaglio. CONSTITUTION:An ink supply device 10 is composed of a cylindrical screen plate 11 having an ink permeating area 14 corresponding to a printing area 7a of a flat-plate-like intaglio 7 and a blade 12 that applies squeeging to the said screen plate 11 and forces out the ink through the ink permeating area 14 of the screen plate 11. The ink (a) is supplied to the intaglio 7 from the screen plate 11 side by making the ink permeating area 14 of the screen plate 11 correspond to the printing area 7a of the intaglio 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink supply method and an ink supply device for a circular pressure type printing device such as an intaglio printing device, and an intaglio printing method and an intaglio printing machine.

0002

2. Description of the Related Art Conventionally, in a circular pressure type printing apparatus that prints by transferring ink from an intaglio plate, for example, a blanket cylinder is movable up and down, and the plate and substrate are moved under the blanket cylinder. 2. Description of the Related Art There is an intaglio printing apparatus that prints on a substrate, such as a glass substrate, by reciprocating a cart that supports the substrate.

For example, as shown in FIG. 6, in this intaglio printing apparatus 1, a cart 3 is supported on a pedestal 2 so as to be movable in the horizontal direction, and a blanket cylinder 4 is movable in the vertical direction with respect to the pedestal 2. is supported by In this intaglio printing device 1, the ink supplied by the operator onto the printing plate is transferred to the squeegee 5.
The squeegee 5 and the doctor 6 are moved laterally on the plate to perform squeegeeing and doctoring, and the squeegee 5 and doctor 6 are also attached to the pedestal 2 so as to be movable up and down, so that the squeegee 5 and the doctor 6 can be moved horizontally on the plate. It is provided so that it waits above after doctoring is completed.

The operation of the intaglio printing apparatus 1 is such that the plate 7 (doctored) attached to the plate plate a fixed on the carriage is moved below the blanket cylinder 4 by the movement of the carriage 3. position, and the blanket cylinder 4 is lowered to make contact. After that, while moving the trolley 3,
The blanket cylinder 4 is rotated to transfer ink from the plate 7 to the blanket 8 wound around the circumferential surface of the blanket cylinder 4.

[0005] Next, the image is transferred onto a substrate 9 attached to a substrate surface plate b fixed on the carriage 3. The blanket cylinder 4 which has received the ink from the plate 7 is once raised and stands by. The carriage 3 moves in a direction opposite to the direction of movement during ink transfer, and positions the substrate 9 below the waiting blanket cylinder 4. Thereafter, the blanket cylinder 4 descends and comes into contact with the substrate 9, and at the time of transfer, the carriage 3 moves and the blanket cylinder 4 rotates to transfer the ink from the blanket 8 to the substrate 9. When this transfer is completed, the carriage 3 moves in the opposite direction again and returns to the standby position.

[0006] When the carriage 3 returns to the standby position, that is, when the plate 7 stops at the ink supply position, ink is supplied to the plate. Thereafter, the squeegee 5 descends onto the plate and squeegee (in the direction of arrow R) on this plate. Further, after the squeezing is completed, the doctor 6 descends onto the plate and performs doctoring (in the direction of arrow L), and the plate 7 from which excess ink has been scraped off is provided so as to come into contact with the blanket 9.

[0007]

[Problems to be Solved by the Invention] However, in the above-mentioned intaglio printing apparatus, when the plate is waiting at the ink supply position, ink is manually supplied onto the plate by the operator, and the ink is applied onto the effective plate surface. Since a slightly larger amount of ink is supplied to ensure that the ink is distributed, after squeegeeing and doctoring, the ink is scraped up on the side where the squeegee and doctor were waiting, that is, the end of the doctoring, and remains in this state. If the remaining ink is left as it is, its properties may change or dust may be mixed in, making it difficult to use the ink economically. Therefore, the current situation is that the ink collected by the doctor is collected by an operator using a spatula or the like, and the ink is spread on the printing plate and used again when the ink is supplied.

[0008] As described above, ink supply requires complicated work, and as mentioned above, the amount of ink supplied is irregular and tends to be excessively supplied, and when ink is used repeatedly, Also, contamination with garbage, etc.
It was necessary to consider the possibility of deterioration of the ink.

[0009] The reason why ink is supplied in this way is that because the pattern on the printing material is sharp, if the viscosity of the ink is low, the shape of the ink will be deformed during ink transfer or blanket transfer. It is from. For this reason, a certain degree of viscosity is required, but it is not easy to supply ink with such an ink viscosity. For example, even if an inking roller is used, it is difficult for ink to enter the cells simply by contact. On the other hand, when the printing plate is flat, it is difficult to use methods such as dipping.

[0010] Therefore, the present invention aims to supply ink to the effective printing surface of an intaglio plate, that is, to the area above the print area, without requiring the labor of the operator and in excess or deficiency. The purpose is to make it available for use.

The present invention has been made in consideration of the above-mentioned problems, and the ink transmission area is divided from the ink transmission area of a flat or cylindrical screen plate having an ink transmission area corresponding to the image area of the intaglio plate. The above-mentioned problems are solved by providing an ink supply method and an intaglio printing method, which are characterized in that ink is supplied to the intaglio while making the ink correspond to the image area of the intaglio. It also includes a flat or cylindrical screen plate having an ink permeable area corresponding to the image area of the intaglio plate, and a blade for squeezing the screen plate to send out ink from the ink permeable area of the screen plate. An ink supply device, a flat or cylindrical screen plate having an ink permeable area corresponding to the image area of the intaglio plate, and squeezing the screen plate to send out ink from the ink permeable area of the screen plate. The object of the present invention is to provide an intaglio printing machine characterized by being equipped with a blade, thereby solving the above problems.

0012

According to the present invention, ink is almost uniformly supplied from the ink permeable area of the screen plate to the corresponding image area of the intaglio plate by the screen printing method. At this time, although the roughness of the ink permeable area is greater than that of the image area of the intaglio plate, it is sufficient for rough ink supply.

[0013]

Embodiments Next, the present invention will be explained in detail based on embodiments shown in FIGS. 1 to 4. 1 and 2 show a first embodiment. Reference numeral 10 indicates an ink supply device installed opposite to the plate 7, and the ink supply device 10 is composed of a cylindrical screen plate 11 and a plate 12 installed inside the screen plate 11. The plate 7 has a structure that can move forward and backward together with the surface plate, whereas the screen plate has a structure that can move up and down, and the blade 12 can move up and down as well as forward and backward. Further, an ink pipe 19 is provided in front of the blade 12, and uniform slits are provided in the width direction so that ink can be supplied into the screen plate.

The screen mesh 13 of the screen plate 11 is provided with an ink transmission area 14 corresponding to the image area 7a of the plate 7, and ink c is supplied inside the screen plate 11 and passes through the screen mesh 13 inward. Squeezing is performed by the blade 12 from the side, and the ink is pushed outward from the ink permeable area 14. The blade 12 at this time is at least wider than the width of the ink permeable area 14.

Screen plate 1 of this ink supply device 10
1 rotates in direction B with respect to plate 7 moving in direction A (the screen plate 11 and plate 7 are not in contact with each other), and the ink permeable area 14 of the screen plate 11 and the image area 7a of the plate 7
As described above, the ink sent out from the ink permeable area 14 by the squeezing of the blade 12 is uniformly supplied to the image area 7a of the printing plate 7. Further, the screen plate 11 may be rotated in a direction along the moving direction of the plate. Screen version 11
The ink transmission area 14 of the screen plate 7 is positioned in front of the end of the image area 7a of the plate 7, and ink supply from the ink pipe 19 and rotation of the screen plate 11 are started at the same time. Further, at the time when it passes the printing area 7a, the ink distribution is stopped, the rotation of the screen plate 11 is also stopped, the plate 7 is lowered, and the screen plate 11 is returned to its original position.

FIGS. 3 and 4 show a second embodiment. This ink supply device 10 is composed of a flat screen plate 15 and a blade 16, which are disposed opposite to the plate 7. The screen mesh 17 of the screen plate 15 has ink that passes through it corresponding to the image area 7a of the plate 7. A region 18 is provided, and ink c is supplied onto the screen plate 15 in advance and the screen mesh 17 is squeezed by the blade 16, so that the ink is pushed out from the ink permeable region 18.

The ink permeable area 18 of the screen plate 15 corresponds to the printing area 7a of the plate 7, and when the above-mentioned blade 16 performs squeezing, the ink permeable area 18 corresponds to the print area 7a of the plate 7. The ink c is uniformly supplied to the image area 7a of No. 7. Its operation is similar to that of the first embodiment. In this embodiment, the plate is in the form of a flat plate, but it may be in the form of a cylindrical plate cylinder, or it may be in the form of a type in which the printing material is directly transferred onto the printing material without using a blanket.

Next, FIG. 5 shows an example of a circular pressure type intaglio printing machine used in the present invention. To explain the main components of this printing machine 21, reference numeral 22 is a printing plate, 23 is a printing plate fixing table that supports the printing plate 22 from below, 24 is a rotatable blanket, and 26 is a printing target. body, 27
is a printing material fixing table that supports the printing material 26 from below. In this case, the printing plate fixing table 23 and the printing material fixing table 27 are both mounted on a common pedestal 28.
, and both slide together in the direction of the arrow in the figure. Reference numeral 29 is the pedestal 28
The rail 30 serves as a guide when moving the main body frame. Furthermore, an ink supply device 31 for applying ink and a doctor 32 for leveling the applied ink are provided above the printing plate 22.

In order to print on the printing material 26 using the printing machine 21, ink is applied to the printing plate 21 using the method shown in Example I or Example II, and the plate pattern is once applied to the printing medium 26 as described above. The plate pattern is transferred onto the outer peripheral surface of the blanket 24, and the plate pattern is transferred from this blanket onto the printing medium 26.

[0020]

[Effects of the Invention] As explained above, according to the present invention,
The ink transmission area of the screen plate corresponds to the printing area of the printing plate, and ink is supplied to the printing area of the printing plate through the ink transmission area of the screen printing plate, so that the ink can be uniformly applied to the required areas on the printing plate without requiring manual labor. This eliminates the conventional oversupply of ink and enables economical use of ink. Furthermore, since ink is supplied through a screen mesh, dust can be removed at the same time, making it possible to supply ink of a constant quality. Furthermore, since there is no oversupply of ink, the degree of staining of the plate with ink is small and cleaning is easy, and the ink can be changed by replacing the entire ink supply device, so it is especially possible to print multiple colors from the same plate. This has excellent practical effects, such as making it extremely easy to change the ink to be supplied.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of an ink supply device according to the present invention from the side.

FIG. 2 is an explanatory diagram showing the first embodiment from the top side.

FIG. 3 is an explanatory diagram showing the second embodiment from the side.

FIG. 4 is an explanatory diagram showing the second embodiment from the top side.

FIG. 5 is an explanatory diagram showing the entire printing press used in the present invention from the side.

FIG. 6 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

10...Ink supply device 11, 15...Screen version 12, 16...Blade 13, 17...Screen mesh 14, 18... Ink transmission area 19...Ink piping 21...Printing machine 22...Print version 23...Printing plate fixed table 24...Blanket 26...Printing material 27... Printing material fixing table 28... mount 29...Rail 30...Body frame 31...Ink supply device 32...Doctor

Claims (4)

[Claims] 1. From the ink transmission area of a flat or cylindrical screen plate having an ink transmission area corresponding to the image area of the intaglio plate, the ink transmission area is made to correspond to the image area of the intaglio plate. An ink supply method characterized by supplying ink to. 2. A flat or cylindrical screen plate having an ink permeable area corresponding to the image area of the intaglio plate, and a blade for squeezing the screen plate to send out ink from the ink permeable area of the screen plate. An ink supply device characterized by comprising: 3. From the ink transmission area of a flat or cylindrical screen plate having an ink transmission area corresponding to the image area of the intaglio plate, the ink transmission area is adjusted to correspond to the image area of the intaglio plate. An intaglio printing method in which ink is supplied to the plate and the plate is transferred to the printing material with or without a blanket. 4. A flat or cylindrical screen plate having an ink permeable area corresponding to the image area of the intaglio plate, and a blade for squeezing the screen plate to send out ink from the ink permeable area of the screen plate. An intaglio printing machine characterized by: