JPH042430B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides an ink supply system for an intaglio offset printing machine in which an intaglio surface plate, a printing material surface plate, an ink supply stand and a transfer cylinder are movable relative to each other. Intaglio offset printing in which the stand is equipped with an ink leveling squeegee that can move up and down relative to the intaglio plate, and an ink doctor blade for filling ink into the intaglio cells and scraping off ink in non-image areas other than the cells. Regarding the ink supply device of the machine.

(Prior Art) An ink supply device for an intaglio offset printing machine, for example, as shown in FIG. There are some that are movable. The ink supply stand 4 is equipped with an ink leveling squeegee 8 that evens out the ink on the intaglio A side to a predetermined thickness when the surface plate moves, and when the surface plate moves in the opposite direction, the ink leveling squeegee 8 is installed inside the intaglio A cell when the surface plate moves in the opposite direction. A doctor blade 7 is provided for filling ink into the area and scraping off ink from the area to be printed. The squeegee 8 and the blade 7 can move up and down relative to the intaglio.
The squeegee 8 stops at a lower end point with a certain interval in order to level the ink film thickness to a predetermined thickness on the A side of the intaglio plate. On the other hand, the doctor blade 7 stops at a lower stop point where its tip contacts the intaglio A surface.

FIG. 5 is a side view illustrating the order of ink supply operations.

FIG. 5A, the squeegee 8 is lowered to the outside of the ink a that has been supplied to the left end of the intaglio A surface, and the intaglio surface plate 2 is moved relative to the squeegee 8 to the left in the drawing, and the intaglio A cell is moved. Supplying ink a to a predetermined film thickness within the (image area) and the entire surface of the non-image area,
In addition, the ink is leveled so that a portion to which no ink is attached remains at the right end of the intaglio to prevent the ink from drying within the intaglio cells. Next, in FIG. 5B, the squeegee 8 is raised, the doctor blade 7 is lowered, and the ink a is applied to the intaglio plate while the surface plate 2 is relatively moved to the right. While filling the A cell, completely scrape off the ink in the non-image areas.
Next, in FIG. 5C, the surface plate 2 is moved to the left, the blanket cylinder 1 is inserted, and the ink pattern of the intaglio plate A is transferred onto the cylinder. At the same time, the squeegee descends and begins leveling the doctored ink a. FIG. 5D shows a printing material B placed on the printing material surface plate 3 installed integrally with the surface plate 2.
The ink pattern of the blanket cylinder 1 is printed on the blanket cylinder 1. At this time, on the surface of the intaglio plate A, the ink a leveled by the squeegee 8 is raised on the right end of the intaglio plate A, and in order to take out the printed material B after printing, the blanket cylinder 1 is moved as shown in FIG. When the printing pressure is released and the surface plates 2 and 3 are moved to the right, the problem that the raised ink of the intaglio plate A adheres to the blanket cylinder is likely to occur. Therefore, plate plate 2
It is necessary to level out the ink a that has risen on the top, and it is also necessary to prevent the ink remaining in the cells on the side A of the intaglio from drying out while the printing medium B is being taken out. become.

(Object of the Invention) The present invention is aimed at making the size of a printing press as compact as possible, and preventing the build-up of ink on the plate from adhering to the blanket. An object of the present invention is to provide an ink supply device equipped with a mechanism to prevent this.

(Structure of the Invention) The present invention is characterized in that a plate surface plate, a printing material surface plate, an ink supply pedestal, and a transfer cylinder are movable relative to each other, and the ink supply pedestal main body is provided with an ink that can move up and down relative to the intaglio plate. In the ink supply device of an intaglio offset printing machine equipped with a leveling squeegee and an ink doctor blade, the
This is an ink supply device for an intaglio offset printing press, characterized in that it is provided with an ink doctor blade having an intermediate stop point.

The device of the present invention will be explained in detail with reference to the drawings.
FIG. 1 is a side view of one embodiment of the apparatus of the present invention, in which a support plate 14 is integrally installed on the upper part of the ink supply stand 4 and the main body frame 4a and straddles the plate surface plate 2 and the printing material surface plate 3. An air cylinder 6 is provided, an ink leveling squeegee 8 is attached to the tip of a downward rod 17 of the cylinder, and a swing support plate 15 is provided parallel to the support plate 14 so as to be swingable with respect to the gantry frame 4a by appropriate means. An air cylinder 5 is provided on the support plate 15, a holder plate 12 is attached to the downwardly directed tip of the cylinder, and a doctor blade 7 is provided on the holder plate. FIG. 2 is a front view of the device of the present invention, in which guide shafts 1 are fitted onto both ends of the holder plate 12 upward into the support plate 15, and are prevented from coming off by nuts 11 above the plate 15.
3, and an adjustment plate 10 of an appropriate thickness is provided below the nut 11 so as to be removable. The adjustment plate 10 is provided at the tip of the rod of the micro air cylinder 9 attached to the support plate 15.
In accordance with the timing of the vertical movement of blade 7,
By operating the cylinder 9, the adjustment plate 10 is moved in and out of the lower side of the nut 11. On the other hand, a squeegee 8 provided parallel to the blade 7 can be moved up and down in the direction of the plate plate 2 by the operation of an air cylinder 6.

FIG. 3 is a perspective view of the device of the present invention. The leveling squeegee 8 may be provided with guide shafts 17a on both sides in the longitudinal direction, similar to the blade 7.

(Function of the Invention) In the ink supply device of the present invention, when the cylinder 5 shown in FIG. The adjustment of the blade 7 depends on whether the air cylinder 5 is lowered after inserting the adjustment plate 10 into the gap formed between the lower surface and the upper surface of the support plate 15, or when the adjustment plate 10 is not inserted. The bottom end point can be changed in two steps. When using the blade 7 to flatten the raised ink on the A side of the intaglio plate to an appropriate film thickness over the entire surface of the intaglio plate, operate the air cylinder 9 and insert the adjusting plate 10 into the lower surface of the nut 11 and press the lower end of the blade 7. The blanket cylinder 1 can be stopped slightly above the contact position with the surface A of the intaglio plate, and in order to take out the printing material B on the surface plate 3 after printing in FIG. When moving the blanket, a fifth
Figure 2: In order to prevent the raised ink a from adhering to the right edge of the drawing of the intaglio plate A, do not lower the blade edge of the doctor blade 7 completely onto the plate surface, but lower it to a desired height where it does not come into contact with the plate surface to level the ink. It is something that can be done.

(Effects of the Invention) The present invention enables the ink on the plate to be flattened by positioning the doctor blade at a desired height above the plate surface to the extent that ink does not adhere to the peripheral surface of the blanket cylinder without lowering the doctor blade edge completely to one side. Since it can be leveled, it is possible to avoid the problem of ink adhering to the blanket cylinder when it is moved toward the intaglio surface plate. Since the printing presses can be arranged fairly close to each other, the printing press can be made more compact.

[Brief explanation of drawings]

Figure 1 is a side view of the apparatus of the present invention, Figure 2 is a front view of the apparatus of the present invention, Figure 3 is a perspective view of the apparatus of the present invention, and Figure 4 is an intaglio offset printing machine in which the apparatus of the present invention is installed. Side view showing the outline of the machine, Figure 5 A, B,
C and D are side views of an ink supply device illustrating a conventional ink supply operation in an intaglio offset printing press, and FIG. .

Claims (1)

[Claims] 1. The plate surface plate and printing material surface plate, the ink supply pedestal and the transfer cylinder are movable relative to each other, and the ink supply pedestal main body includes an ink leveling squeegee and an ink doctor blade that can move up and down relative to the intaglio plate. What is claimed is: 1. An ink supply device for an intaglio offset printing press, characterized in that an ink doctor blade having an intermediate stopping point is provided between the top and bottom stopping points of an up-and-down movement.