JPH01263049A - Method for varnishing-pattern coating to printed matter - Google Patents

Abstract

PURPOSE:To enhance the quality of a printed matter, reduce a set up time, and contrive the improvement in productivity and the reduction in labor, by a method wherein, a resin relief plate is overlapped and bonded on a press plate formed by baking a pattern coating image on a metal sheet patterns of the both plates are matched with each other to form a coating plate, and this coating plate is set on the periphery of a coater cylinder to conduct the coating. CONSTITUTION:On a resin relief plate 12, a projecting pattern coating image 12a corresponding to a printing image is formed, and on the back side thereof a duplicated form 13 is bonded. On the other hand, a pattern coating image 14a corresponding to the printing image is formed on a press late 14. The resin relief plate 12 applied with the duplicated film 13 is depressed against the press plate 14 on a mount while the image 12a is overlapped on the image 14a of the press plate 14, whereby the duplicated film 13 is bonded to the press plate 14 to complete a coating plate 11. When a printing operation is started with the coating plate 11 set on the periphery of a coater cylinder 5, printed paper 8 passes through between the coater cylinder 5 and a pressure cylinder 7. On the other hand, varnish in a varnishing vessel 2 is lifted up by a fountain roller 3 and applied to the projecting pattern coating image 12a by a from roller 6; thus, the varnish is transferred and coating to a part to be patterned of the paper 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a varnish pattern coating method for applying varnish coating only to some parts, such as picture areas, of printed matter.

[Conventional technology]

Varnish coating is applied to the paper surface of printed matter to prevent dirt and give gloss to the surface of the paper.It is mainly used for printed matter that requires beauty, such as book covers, catalogs, and pamphlets. There is.

Conventionally, this type of varnish coating equipment has been installed between the printing unit and the paper delivery device of a sheet-fed rotary printing press, or installed independently, and its structure is, for example, as follows. Something like this is known. In other words, this device consists of a source roller that rotates in a varnish boat that stores varnish, a coater cylinder that has a blanket wrapped around its circumferential surface, and a peripheral surface that is arranged between the source roller and the coater cylinder so that they are in contact with each other. When each roller rotates, the varnish film that is pulled up from the inside of the varnish tank by the original roller and attached to the circumferential surface of the roller is metered by a metering roller. The varnish film is applied to the blanket surface of the coater cylinder by a deposition roller, and the varnish film is applied to the printing surface of the paper that is running while being held between the blanket cylinder and the impression cylinder.

In this type of varnish coating, for example, when gluing a folding box that is printed in an expanded form, it is necessary to apply the coating only to the picture or pattern area of the printed matter, such as when it is not desired to apply varnish to the area. may be done,
For this purpose, partial coating called pattern coating is performed.

In the conventional pattern coating method, the printed pattern is reverse-transferred from undried paper immediately after printing onto a blanket wrapped around the coater cylinder, and the blanket is removed from the cylinder.
The blanket is spread out on a table and the non-varnished areas other than the pattern areas are cut off by one layer of thickness using a cutter, and then the blanket is wrapped around the coater cylinder again to perform the coating operation. By doing so, the coating is applied only to the pattern portions corresponding to the convex portions of the blanket that are not torn off.

[Problem to be solved by the invention]

However, in this conventional varnish coating method, unnecessary parts must be removed from the blanket as described above, so it takes a long time to create a complex pattern or pattern. There was a problem in that it required a lot of effort. In addition, if the peeled area of the blanket is large, its tensile strength will decrease when the blanket is reattached to the coater cylinder, and the pattern image will tend to become larger in the vertical direction and smaller in the horizontal direction, resulting in improved coating accuracy. Not only does this result in a decrease in the quality of printed matter, but also the need to replace the blanket many times to correct this misalignment further reduces efficiency and increases the burden of labor.

[Means to solve the problem]

In order to solve these problems, in the present invention, as a varnishing pattern coating method, a double-sided adhesive-treated film is pasted on the back side of a resin letterpress plate on which a convex pattern coating pattern is formed on a photosensitive resin letterpress material. A letterpress is pasted onto a thin metal plate with a pattern coating design printed on it, with both designs aligned and laminated together to form a coating plate, and this coating plate is attached to the circumference of the coater cylinder to apply the coating. The method of doing this was adopted.

[For production]

The resin letterpress and metal printing plates are pasted together with their designs aligned, so the designs do not shift and do not stretch even when pulled when attached to the coater cylinder. There is no need to create one.

〔Example〕

1 and 2 are diagrams shown to explain the method of coating a printing cylinder with a varnish pattern according to the present invention, in which FIG. 1 is a perspective view of a varnish pattern coating device, and FIG. 2 (a) , Φ) is an explanatory diagram of the production sequence of coating plates.0 A pattern coating device l for applying varnish, which is disposed between a printing unit and a paper ejecting device (not shown), is used in a varnishing tank 2 in which varnish is stored. It is equipped with a rotating base roller 3, and a metering roller 4 is disposed diagonally above the base roller 3 so that its circumferential surfaces are in contact with each other.The side of the zero base roller 2 is coated with a coating to be described later. A coater cylinder 5 with a plate 11 mounted on the circumferential surface is disposed, and the coating plate 11
A contact roller 6, which is in contact with the metering roller 4, is removably connected to the circumferential surface of the meter roller 4.

Furthermore, below the coater cylinder 5, there is an impression cylinder 7 for coating! The printed paper 8 sandwiched between the coater cylinder 5 and the impression cylinder 7 is placed in pressure contact with the circumferential surface of It travels in the direction shown by arrow A in the figure while being gripped by claws as it rotates with the provided transfer drums 9 and 10.

Therefore, the structure of the coating plate 11 will be explained. The coating plate 11 includes a resin letterpress plate 12 made of a photosensitive resin letterpress material and having a convex pattern coating pattern 12a corresponding to the printed pattern formed on its surface, and a double-sided film 13 whose both sides are treated with an adhesive. It consists of a printing plate 14 made of a thin aluminum plate and having a pattern coating pattern 14a corresponding to the printed pattern formed on its surface,
The resin relief plate 12 and the printing plate 14 are bonded together with a film 13 interposed therebetween.

A varnishing pattern coating method using the apparatus configured as above will be explained. As shown in FIG. 2(a), a convex pattern coating pattern 12a corresponding to the printed pattern is formed on a resin letterpress plate 12 made of a photosensitive resin letterpress material in the same manner as a printing plate, and then A double-sided film 13 is attached to the back side. On the other hand, as shown in Figure 2,
A pattern coating pattern 14a corresponding to a printed pattern is formed on a printing plate 14 made of a thin aluminum plate in the same manner as a printing plate. And double-sided film 1
When the above-mentioned resin letterpress plate 12 with 3 attached is pressed against the printing plate 14 on the table while overlapping its pattern 12a and the pattern 14a of the printing plate 14, the double-sided film 13 is stuck to the printing plate 14 and a coated plate is formed. 11 is completed.

Therefore, when printing work is started after this coating plate 11 is attached to the circumferential surface of the coater cylinder 5, the printing work 8 after printing is transferred to the transfer plate v49. FJJM7. J of ffLIMI O
The sheet is conveyed while being held in the l, and passes between the coater cylinder 5 and the impression cylinder 7. On the other hand, the varnish in the varnish boat 2 is pulled up by the original roller 3 and metered by the ff1t roller 4, and then
A convex pattern coating pattern 12 is formed by the application roller 6.
Attach to a. As a result, the varnish of the pattern coating pattern 12a is transferred and applied to the pattern portion of the paper 8. In this case, the pattern coating pattern 14a of the printing plate 14 is precisely formed at the same position as the pattern on the printing plate on the printing unit side, and the printing plate 14 is installed in the correct position, and both patterns 12a, 14a are overlapped with high precision, the printed pattern and the varnished area will not be misaligned, and when the coating plate 11 is installed,
Since this is formed by laminating a strong metal plate and a resin plate, even if the pattern area is small, it will not stretch when the coating plate 11 is pulled in the vertical direction.

The arrangement of cylinders in the apparatus is not limited to the number and arrangement of cylinders in this embodiment, and the method of the present invention can be applied not only to an apparatus incorporated in a sheet-fed rotary printing press but also to an independent pattern coating apparatus. It can be applied in the same way to obtain the same effect.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, as a varnishing pattern coating method, a double-sided adhesive-treated film is pasted on the back side of a resin letterpress plate on which a convex pattern coating pattern is formed on a photosensitive resin letterpress material. Letterpress, metal! ! ! A method is adopted in which a coating plate is formed by laminating both patterns onto a printing plate on which a pattern coating pattern is printed on a thin plate, and this coating plate is attached to the circumferential surface of the coater cylinder to perform coating. This allows the pattern position on the coating plate to be quickly and accurately aligned with the pattern position on the printing unit side, so the printing position and varnishing position do not deviate, improving the quality of printed matter and reducing preparation time. This will shorten the time required to improve productivity and reduce labor. In addition, since the pattern coating plate is formed by laminating a strong metal plate and a resin plate, even if it is pulled in the vertical direction when attached to the coater cylinder, it will not stretch and cause the pattern to shift. The preparation time is further shortened.Furthermore, depending on the design, it is not necessary to produce a resin plate of the size of the model plate, so it is possible to reduce the amount of resin plate material used, and it is possible to Coating is now possible without having to change or replace the blanket underlay paper size each time the printing paper size is changed, improving work efficiency.In addition, it is easier to coat the resin plate than with the conventional A-separation of the blanket. Since the relief depth can be set arbitrarily, making it deeper will improve the amount of varnish left during operation, which will be advantageous during long runs.Furthermore, it will be possible to produce resin pattern coated plates for models larger than AO size, making it a versatile Improves sex.

[Brief explanation of the drawing]

1 and 2 are diagrams shown to explain a method of coating a printing cylinder with a varnish pattern according to the present invention, in which FIG. 1 is a perspective view of a varnish pattern coating apparatus, and FIG. ), et al.) are explanatory diagrams of the manufacturing order of the coating plate. 5...Coater cylinder, 11...Coating plate, 1
2...Resin letterpress, 12a, 14a...Pattern coating design, 13...Double-sided film, I4...
...Print version.

Claims (1)

[Claims] A double-sided adhesive-treated film is pasted on the back side of a resin letterpress plate with a convex pattern coating pattern formed on a photosensitive resin letterpress material, and both patterns are placed on a printing plate with a pattern coating pattern printed on a thin metal plate. A varnishing pattern coating method for printed matter, characterized in that a coating plate is formed by stacking and pasting together, and this coating plate is attached to the circumferential surface of a coater cylinder to perform coating.