JPS59133057A - Impression cylinder apparatus for offset multicolor printing press - Google Patents

Abstract

PURPOSE:To facilitate registration or the like along with the miniaturization of a printing press body by arranging a blanket cylinder of a printer so as to have a material to be printed free to attach to or separate from the blanket cylinder pinched in contact therewith. CONSTITUTION:A blanket cylinder 9 is rotated to transfer printing parts of a plate of a plate cylinder 10a onto a blanket 9a with a first plate cylinder 10a in the first color and continually done so in he second color with a second plate cylinder 10b. Likewise, the specified printing parts are transferred with a third and fourth plate cylinders 10c and 10d sequentially and laid at the same place of the blanket 9a while the blanket cylinder 9 makes a turn to complete the transfer of four colors. As an impression cylinder 12 is rotated pressed on the blanket 9a of the blanket cylinder 9, the multicolor printing parts formed on the surface of the blanket cylinder 9 are transferred and printed onto the surface of a label 3 of a continuous label body 1 passing therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an impression cylinder device for an offset multicolor printing press, which is suitable for printing on long materials such as a continuous body of pressure-sensitive adhesive labels.

A conventional multicolor printing press has a plate cylinder (101
), an I unit (104) consisting of a blanket cylinder (102) and an impression cylinder (108), which has a mechanism for printing one color, is connected to two or four units, and the paper is sequentially passed through the I unit (104) to print two or four colors. There are things that need to be printed, but the more colors there are, the more units (104) there is a need to increase the number of units, so a wide installation requires space.

Furthermore, since each unit (104) is printed one color at a time, skill is required to register each color, there is a high possibility that misalignment will occur, and a large number of test prints will be required.

The present invention has been made in view of the above circumstances, and is an offset multicolor printing machine that is capable of reducing the size of the printing machine itself, making it extremely easy to perform registration, etc., and eliminating waste caused by test printing. We aim to provide the following.

Hereinafter, the present invention will be explained in detail according to embodiments shown in the drawings.

FIG. 1 is a perspective view of a printing machine for printing a continuous body of pressure-sensitive adhesive labels using an impression cylinder device according to an embodiment of the present invention.

(1) is a continuous body of labels, which are printing materials, and is coated with a release agent layer formed by coating a silicone resin on the surface of a band-shaped mount such as Kame-shi. A label (3) whose back surface is coated with a VC pressure-sensitive adhesive is temporarily attached at appropriate intervals on the adhesive layer surface. The continuum of such labels (1) is wound around a winding reel (4) K, and is wrapped around a winding reel (a).
The continuous body of labels (1) sent out from
), the paper is sequentially transferred to the paper feeding device (6), and a printing device (T') is provided in between.

The printing device (7) is provided with four sets of plate cylinders 00) around a blanket cylinder (9) fixed to a rotating shaft (8),
An inking device (111) is attached to each plate cylinder (10)K, and an impression cylinder device (121) is press-fitted on the lower surface of the blanket cylinder (9).

Then, the diameters of the four sets of plate cylinders (101 are almost the same,
The length is a quarter of the diameter of the blanket cylinder (9).

The blanket cylinder (9) has a blanket (9a) made of a rubber sheet molded around its outer periphery.

In the blanket cylinder (9), the length of the blanket (9a) is formed to be equal to the length of the plate surface in the plate cylinder (IQI), and the other parts are one step lower, but one end of the blanket (9a) is The 04 sets of plate cylinders (10a) (10bX10cX10d), which are fixed to the blanket cylinder (9) and whose other end is wrapped around and tensioned, cooperate with the inking device [11] to print appropriate colors separated by color. is formed so as to be printed on each plate cylinder (loaX job) (10c) (1od), and a relief plate 03) is attached.

Then, by rotating the blanket cylinder (9), the printing line of the plate of the plate cylinder (10a) is transferred to the blanket (9a) in the first color by the first plate cylinder (lea), and then the printing line of the plate of the plate cylinder (10a) is transferred to the blanket (9a). 10b) transfers the printing line of the plate of the plate cylinder (lob) with the second color, and then sequentially transfers the predetermined printing line using the 8th plate cylinder (10c) and the 4th plate cylinder (10d), and During one rotation of the cylinder (9), the blanket (9a
) in the same location and completely defeat the transfer of 4 colors.

When the impression cylinder α2 is rotated in pressure contact with the blanket (9a) of the blanket cylinder (9), the label (8) of the label continuous body (1) passing between them is formed on the surface of the blanket cylinder (9). A predetermined multicolored streak (mirror image)
is transferred and printed.

In the impression cylinder device 02), the impression cylinder Oa is not always in pressure contact with the blanket cylinder (9) (it is formed so that it can move forward and backward toward the blanket cylinder (9), and accurate registration cannot be performed. Even in the event of a failure, immediately pull the impression cylinder away from the blanket cylinder (9) and press the next advancing label (3) to remove the blanket cylinder (9a).
) is configured to prevent the lines in the section from being printed.

The advancing/retracting device (5) consists of Miki's roller stop (161αη), which passes through the lower surface of the front roller 05!, the upper surface of the displacement roller α6, and the lower surface of the rear roller αη, and then feeds the label continuum (S). , a displacement roller 6) is provided between the front roller a9 and the rear roller (17) so as to be vertically movable.

Further, a feeding device (6) transports the continuous label body (1) through the printing device (7) to the next winding process (not shown).
is a vacuum suction device with a feed row field with suction holes marked α penetrating through its cylindrical surface, and the vacuum suction device (5) is used to continuously print labels from the suction hole side of the feed roller. The blanket cylinder (9) is configured to suck the release sheet (2) of the body (1) and rotate the feed roller to feed the continuous label body (1) at an appropriate speed.
), and the spacing between labels (8) and transport speed, so there is a difference between the position of the image transferred from the plate cylinder on the surface of the blanket cylinder (9) and the next printing. A discrepancy occurs between the positional relationship of the label (8) and the label (8) that is received. In other words, if the outer circumference of the blanket cylinder (9) is longer than the length of the label (8) and the length between the labels (8), the blanket cylinder (9a) should be printed after one rotation. It will rotate later than label (8), and label (8) will move one step ahead. Therefore, since the surface of the blanket cylinder (9) is one step lower than the blanket (9a) part, when one printing by the blanket cylinder (9) is completed, the displacement roller of the advancing/retracting device (5) is moved upward. The label continuum (1) is printed by taking into account the distance between the labels and the distance to the printing line of the blanket (9a) on the next blanket cylinder (9) to be printed.
Pull back by the necessary feed amount for each company stamp. In other words, the feeding device (
6) is configured so that the pulling force of the displacement roller 161 is larger than the suction force of Pull back, print position of blanket cylinder (9) (9a) and label continuum (
When the 1st label (1st label) is pulled back to the point where it matches the printing position of 8th label, the upward movement of the 1st displacement roller (1G+ is stopped,
The label continuous body (1) is transported in the transport direction V by the feeding device (6).
C transport, and accordingly, the label continuum (1) (7)
The displacement roller (161) is lowered to the initial position in accordance with the transport speed and is kept on standby until the start of the next upward movement.
Again, the same operation as before is repeated.

It goes without saying that the present invention is not limited to the above embodiments, and that changes, applications, modifications, etc. made based on such matters are included in the technical idea of the present invention.

For example, the impression cylinder a41t may be swingably provided on the machine base and may be spaced apart from the blanket cylinder (9) as appropriate. In addition, as a return mechanism for obtaining the required amount of printing, as shown in FIG. , a front displacement roller (16a) is provided above the front roller aω and at the rear opposite to the traveling direction of the printing material (1), and for example, above the rear roller a6, the printing material (1) advances. A rear displacement roller (16b) is provided at the front in the order of the direction.

From its lower end, it passes through the front displacement roller (16a), is sent to the printing device (7), and further advances to the rear displacement roller (16b).
It is rolled up and goes backwards from its lower end in the opposite direction, and is turned again by the rear roller αη and sent forward.

When the printing device (7) prints on the printing material 0), the advance of the printing material (1) is stopped by an appropriate stop device QIl provided at the rear position of the front roller aS, and then At the same time, the front and rear displacement rollers (16a) and (16b) move horizontally while maintaining the same distance, and when the plan is completed, the front and rear displacement rollers (16a and 16b) stop their progress, and the front and rear displacement rollers (16a and 16b) are moved again. Roller (16a) (16b)
changes its direction of travel and moves backwards, returning to its initial position force. Therefore, the front and rear displacement rollers (16a) (1
6b) stops its moving operation and stops the stop device (211
The stop mechanism is released and the printing material is transported in the forward direction. The amount of conveyance of the printing material (1) during this period is determined by the length of the previously printed printing part, the distance between the end of the printing part and the start of the printing part to be printed next, and the blanket cylinder (
9) When the blanket (9b) part is on the printing material (
The length should be determined in consideration of the length until contacting the printed part in 1).

The present invention is configured as described above, and the impression cylinder device is configured such that the impression cylinder that is in pressure contact with the blanket cylinder can be moved toward the blanket cylinder and separated from the metal, so that accurate registration cannot be performed, for example, during test printing. Even in such a case, it is possible to move the impression cylinder back and separate it from the blanket cylinder so that it will not be printed on the subsequently transferred printing material, which will prevent repeated unnecessary printing. do not have.

The printing device includes a plurality of plate cylinders arranged at appropriate intervals on the same curve of a blanket cylinder having a diameter larger than that of the plate cylinder, and during one rotation of the blanket cylinder, the blanket portion of the blanket cylinder is rotated. By sequentially transferring and overlapping as many lines as there are plate cylinders, and printing on a printing material such as a label using these lines, it is much easier to print than a conventional multi-color printing machine with multiple printing units installed. As a result, it can be made smaller, and the printing machine can be installed in a smaller space than conventional machines.

In addition, even if the printed area on the printing material does not match the printing line position on the blanket cylinder and it is necessary to narrow the interval and print sequentially, the advancing/retracting device moves the printing material to an appropriate width. If the structure is modified so that it can be moved forward and backward by a certain amount, it becomes possible to print on a free size printing material regardless of the size of the printing material.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an offset printing press for a continuous body of pressure-sensitive adhesive labels using an impression cylinder device according to an embodiment of the present invention, and FIG. 2 is a front view of a printing press according to a modified example. FIG. 8 is an explanatory diagram of a conventional example. (1)...label continuum, ()...peelable sheet),
(8)... Label, (4)... Winding reel, (5)... Advancement/retraction device 1 (6)... Feeding device, (
'7)... Printing device, (8)... Rotating shaft, (9)...
・-Blanket cylinder, (101... plate cylinder, ull・-
・Inking device, u2)-ra! 161 (16aX16
b)... Displacement roller, α ri 0η... Rear roller, αυ
...Suction hole, αα--Feed roller, ■...Vacuum suction device.

Claims (1)

[Claims] A blanket cylinder having a return mechanism for obtaining an appropriate printing feed amount of the printing material, and a blanket portion provided on a part of the surface thereof, and a blanket cylinder in the same area as the blanket cylinder,
In a multicolor printing machine equipped with a plurality of plate cylinders for letterpress printing at appropriate intervals, in order to transfer a plurality of registered drawing lines to the blanket part multiple times during one rotation of the blanket cylinder, printing An impression cylinder device for an offset multicolor printing press, characterized in that the blanket cylinder Vc of the device is pressed against the blanket cylinder, and the printing material is pressed together with the blanket cylinder so that it can be freely separated from the blanket cylinder.