JPS59133055A - Typographic offset multicolor printing press - Google Patents

Abstract

PURPOSE:To miniaturize the body of a printing press by arranging a blanket cylinder provided with a blanket section at a part of the circumferential surface thereof and a plurality of typographic printing plate cylinders so as to exist while the blanket cylinder makes a turn. CONSTITUTION:A blanket cylinder 15 is rotated to transfer printing parts of a plate on a plate cylinder 16 onto a blanket 15a with a first plate cylinder 16a in the first color and continually with a second plate cylinder 16b in the second color. Likewise, the specified printing parts are transferred with a third plate cylinder 16c and a fourth plate cylinder 16d and laid at the same place on the blanket 15a while the blanket cylinder 15 make a turn to complete the transfer four colors. As an impression cylinder 19 is rotated pressed on the blanket 15a of the blanket cylinder 15, the specific multicolor printing parts formed on the surface of the blanket cylinder 15 are transferred and printed onto a label 3 of a continuous label body 1 passing therebetween.

Description

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

As shown in Fig. 3, a conventional multicolor printing machine uses a plate cylinder (
101), one unit (104) consisting of a rubber cylinder (102) and an impression cylinder (103)... connects 2 or 4 m-structure units that print one color and sequentially passes the paper through it to print two colors or ti
There are products that print in four colors, but the more colors there are, the more units (104) & need to be added, and therefore the more space is required for a wide installation. Moreover,
Each unit) (104) - Because of the method of overlapping one color at a time, skill is required to register each color, and there is a high possibility that misalignment will occur.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a letterpress offset multi-color printing press in which the printing press itself can be downsized and registration can be performed extremely easily.

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 according to an embodiment of the present invention.

(1) is a continuous body of labels, which are the printing material, and the surface roughness of the release sheet (2), which has a release agent layer formed by coating a silicone resin or the like on the surface of a strip-shaped mount made of paper, etc.; A label (3) whose back surface is coated with a pressure-sensitive adhesive is temporarily attached at appropriate intervals on the adhesive layer surface.

The continuous body of labels (1) is wound around a finding reel (4).
The continuum of labels (1) that has been fed out is transferred to an advancing/retracting device (5) having a return mechanism to obtain the required printing feed amount.
), the label is sequentially transferred to a printing device (6) that prints predetermined lines on the surface of the label (3), and then to a feeding device (7).

The one-way forward/backward device (5) is Miki's roller (8) (9) αQ
It passes through the lower surface of the front roller (8) and then passes through the displacement roller (
The front roller (8) and the rear roller (9) simultaneously raise and lower the displacement roller (11 vertically) so as to feed the continuous label (1) through the upper surface of the roller (11) and the lower surface of the rear roller (9). I can be busy as I please.

Further, the continuous body of labels (1) is passed through a printing device (6),
A feeding device (7) that transfers to the next winding process (not shown)
) is made up of a feed roller (12) with suction holes (1) passed through its circumferential surface, which is connected to the vacuum suction device α'4, and the feed roller (12) is connected to the vacuum suction device α'4. The release sheet (2) of the continuous body of silapel (1) is sucked through the suction hole (11), and the feed roller Q2) is rotated to feed the continuous body of labels (1) at an appropriate speed. It is configured.

The printing device (6) includes four sets of plate cylinders (16a) (1
6b) (16c) (16d) are provided, each plate cylinder (
16a) (16b) (16c) (16d) is attached with an inking device (17), and an impression cylinder (19) is press-fitted on the lower surface of the blanket cylinder.

The blanket cylinder θ5) has a plug (15a) made of a rubber sheet wrapped around its outer periphery.

And in the blanket cylinder O0, Prangz)
The length of (15a) is formed to be equal to the length of the plate surface in the plate body, and the other portions are one step lower.

One end of the blanket (15a) is attached to the blanket cylinder (I5).
), and the other end is wrapped around and fixed to keep it under tension.

4 sets of plate cylinders (16a) (16b) (16c) (1
6d) cooperates with the inking device (I7) to separate appropriate colors into each plate cylinder (16a), (16b), (16C), and (16).
d), and a letterpress plate is attached. The diameters of the four sets of plate cylinders (α) are approximately the same, and are a quarter of the diameter of the blanket cylinder (E).

Then, rotate the planktsut torso (planktsu)
(15a), transfer the printing line of the plate in the first color to the first plate cylinder (16a), and then transfer the printing line to the second plate cylinder (16b).
) transfers the image line of the plate of the plate cylinder (16b) with the second color, and then sequentially transfers the printing line of the plate of the plate cylinder (16b) to the third plate cylinder (16c) and the fourth plate cylinder (
16d), a predetermined drawing line is transferred, and during one rotation of the blanket cylinder O@, the transfer of four colors is completed by superimposing it on the same place on the plunger (15a).

When the impression cylinder (19) is rotated in pressure contact with the blanket cylinder (15a), the surface of the label (3) of the label continuous body (1) passing between them is exposed to the blanket cylinder 05). A predetermined multicolored image (mirror image) formed on the surface is transferred printed.

However, since there is a discrepancy between the diameter and rotational speed of the blanket cylinder 6), the spacing between the labels (3), and the transport speed, the image transferred from the plate cylinder (+81) may appear on the surface of the blanket cylinder (I6). Line position and next label (3)
There will be a discrepancy between the positional relationship. That is, the label (
3) Length and label (3) If the outer circumference of the blanket cylinder (16) is longer than the same length, then the label (15a) that the city should print (
If it rotates later than 3), then the label (3)
) would go one step further. Therefore, when one printing by the blanket cylinder (blanket cylinder) is completed, the surface of the blanket cylinder θ5) is one step lower than the plunged part (15a), so the displacement roller QO of the advancing/retracting device (5) is moved around the label. The continuous body (1) of labels is moved upward in a direction substantially orthogonal to the traveling direction of the continuous body (1), and the continuous body (1) of labels is moved upward in a direction different from the traveling direction of the continuous body (1), and the continuous body (1) of labels is moved according to the distance between the labels and the blanket (1) of the next blanket cylinder (15) to be printed. Taking into consideration the distance to the print line in 15a), etc., pull back by the necessary print feed amount. In other words, the configuration is such that the pulling force of the displacement roller 4 is greater than the suction force of the feeding device (7), and the continuous label body (1) is pulled back in the opposite direction by the upward movement of the displacement roller 4. . Then, when it is pulled back by a predetermined width and pulled back to the point where the position of the print line of the blanket cylinder (I5) (15a) @ matches the printing position of the label (3) of the label continuum (1), The upward movement of the displacement roller αQ is stopped, and the continuous label (
1) in the transport direction, and along with this, the displacement roller αQ is lowered to the initial position in accordance with the transport speed of the continuous label body (1), and is kept on standby until the start of the next upward movement.

Then, the printing device (6) prints the next label (3).
), the previous operation is repeated.

In addition, if the impression cylinder (19) is not always pressed against the blanket cylinder (Q5) side, but can move forward and backward toward the blanket cylinder (1), accurate registration etc. will not be possible and failures will occur. Even in this case, it can be immediately pulled away from the blanket cylinder 05) to prevent printing on the next label (3).

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, as a return mechanism to obtain the required amount of printing,
As shown in FIG. 2, a pair of displacement rollers αOa) and (10
b), an advancing/retracting device (5') having a front roller (8') and a rear roller (9') may be used. The advance/retreat device (5'
) has a front roller (8') and a rear roller (9') disposed at a predetermined interval below the printing area of the blanket cylinder (15') of the printing device (6'), and Further, a front displacement roller (10a) is provided above the front roller (8') at the rear opposite to the traveling direction of the printing material (1'), and a front displacement roller (10a) is provided above the rear roller (9'). A rear displacement roller (10b) is provided at the front in the forward direction of the printing material (f) in the traveling direction.

Then, the printing material (r) is rolled up by the front roller (8') and sent from its lower end to the printing device (6') via the front displacement roller (10a), and further advances to the rear displacement roller αOb.
), the sheet is rolled up from its lower end and advances in the opposite direction to the rear, is changed direction again by the rear roller (9'), and is sent forward to the forward feeding device (.tau.).

When the printing device (6') prints on the printing material (1'), the printing material (1') is stopped by an appropriate stop device provided at the rear position of the front roller (8'). is stopped, and at the same time the front and rear displacement rollers (10a) (10
b) moves horizontally while maintaining the same interval, and when printing is completed, the front and rear displacement rollers (10a) (10
b) stops its progress and moves back and forth again to the front and rear displacement rollers (LO
a) 0ob) changes its direction of travel and moves backwards, returning to its initial position. Then, the front and rear displacement rollers (10a) (10b) stop their moving operations, the stop mechanism of the stop device is released, and the printing material (f) is transported in the sequential direction. The amount of conveyance of the printing material (f) 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 beginning of the printing part to be printed next, and the blanket cylinder (15' ) and Prangtuto 05a'
) should be determined by taking into consideration the length of the printed portion of the printing material (1') until it comes into pressure contact with the printing material (1'). However, the relationship between the advancing/retracting device (5') and the feeding of the printing material (f) may be changed as appropriate depending on the type of the printing material (f) and the configuration of the advancing/retracting device (5').

The present invention is configured as described above, and the printing apparatus includes a plurality of plate cylinders arranged at appropriate intervals around a blanket cylinder having a diameter larger than that of the plate cylinder, and during one rotation of the blanket cylinder. , the number of printing lines corresponding to the number of plate cylinders is sequentially transferred and overlapped at one place on the planket part of the blanket cylinder, and the printing lines are printed on a printing material such as a label, so that the printing unit is Compared to conventional multi-color printing presses that are installed in multiple rows, it can be made smaller, and the J printing press 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. Since the printing material can be advanced and retreated by 100 degrees, it is possible to print on any size printing material regardless of the size of the printing material.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a printing press for a continuous body of pressure-sensitive adhesive labels 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. 3 is an explanatory diagram of a conventional example. (1)...Continuum of labels, (f)...Printing material,
(2)...Peelable sheet), (3)...Label, (4)
...winding reel, (5) (5')...
Advancement/retraction device, (6) (6')... Printing device, (7) (
τ)...Feeding device, (8) (8')...Front roller, (9) (9')...Rear roller, (10) (10
a) (10b) - Displacement roller, (11) Suction hole, (+2) Feed roller, Kasumi... Vacuum suction device, En... Rotating shaft, (15) (15' )... Blanket cylinder, (15a) (15a')... Plunge, (+6)... Plate cylinder, 07)... Inking device,
(18)... Letterpress, (+9)... Impression cylinder, □□□...
・Stop device. Pa1 peak

Claims (1)

[Claims] In a letterpress offset printing machine, the printing material has a return mechanism for obtaining an appropriate printing feed amount, and a blanket cylinder in which a plunge portion is provided on a part of the peripheral surface, and the blanket cylinder A plurality of letterpress printing plate cylinders are provided around the periphery at appropriate intervals in order to transfer a plurality of registered printing lines to the plunger portion several times during one rotation of the blanket cylinder. A letterpress offset multicolor printing machine.