JPS5940634B2 - Transfer method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer method, which prevents wrinkles that occur on the sheet due to curling of the transfer sheet, that is, the printed pattern support sheet during the transfer, smoothes the transfer operation, and reduces waste of the sheet. This relates to a transfer method that is devised to eliminate this problem.

The transfer method to be improved by the present invention involves feeding a printed pattern support sheet supporting a desired transferably activated pattern on one surface of the thin film onto a solution of the thin film at a constant speed, and The object to be transferred is placed on the sheet above the dissolving solution while the liquid is flowing, and the pattern is transferred onto the object. Incidentally, the pattern of the pattern support sheet used in such a transfer method extends over the entire width of the sheet.

This is because the pattern-bearing sheet is obtained by printing one turn over substantially the entire width of a sheet having a width several times the width of the sheet, and then slitting the sheet. This is a measure that is naturally taken from the standpoint of improving pattern printing efficiency, and also because it is necessary to form the sheet to an appropriate width to avoid wasting sheets during the transfer process. It is a means to be

However, in the above method, when the sheet 51 reaches the surface of the solution, if the sheet is continuous, both ends along the feeding direction will curl A as shown in the first figure. This is causing problems with transcription.

However, this curl A gradually disappears as the thin film of the sheet S1 swells with the solution, but it takes time to eliminate it, and there may be cases where it does not disappear partially, so it is preferable in any case. This is a phenomenon that does not exist.

The present invention aims to provide a method capable of preventing the above-mentioned curling of a sheet, thereby making it possible to perform the transfer operation smoothly.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

FIG. 2 shows an apparatus for carrying out the present invention, and in the figure, S2 is a printed pattern support sheet that supports a desired pattern on one side of a thin film, and is a rolled sheet 1.
0 by a solvent coating device 12.

The solvent coating device 12 includes a gravure cylinder 14, an impression cylinder 16,
It consists of a pan 18 for storing a solvent, a doctor 20, etc., and the patterned surface of the sheet S2 is coated with the solvent here.

As a result, the ink of the pattern on the sheet S2 is activated and becomes sticky, making it possible to transfer it to an object.

Note that gravure ink is stored in the pan 18 of the solvent coating device, and at the same time other patterns, colors, etc. are added to the pre-printed pattern, the pattern is activated using this gravure ink. You can also do it.

Further, the roll 10 is used as a single thin film, and the solvent coating device 12
The pattern may be applied for the first time in step 1, and then the printed pattern support sheet S2 may be sent to the next step.

As described above, the sheet with the activated pattern passes through the reversing roll 22 and is then sent to the suction roll 24 with the pattern surface facing upward.

The suction roll 24 has a large number of small holes 26 or slits on its surface, and as it rotates, it sucks the bottom surface of the sheet S2 and sends the sheet toward the dissolving solution 28. The sheet S2 brought from the suction roll 24 is then guided along the guide member 30 onto the surface of the solution with its thin film side facing down. Above sheet S
2 travels on the liquid surface while being swollen by the action of the dissolving liquid.

Then, the object 32 to be transferred is applied to the sheet S2 at a position B where the thin film is swollen and softened to such an extent that it does not interfere with the transfer. The transferred object 32 is submerged in the liquid together with the sheet S2, and the adhesive pattern of the sheet is adhered by the action of the liquid pressure.

During this time, the solution 28 is flowing on its surface by the liquid flow generator 34.

Therefore, the sheet S2 can run smoothly on the liquid surface. The liquid flow generating device 34 has a slit-shaped discharge port, and discharges the liquid coming from a pump or the like at a uniform pressure in the width direction of the sheet. By the way, if the above process is continued, the sheet S2 will curl A on the liquid surface as described above in the state shown in the first figure, which will hinder the transfer operation.

Therefore, in the present invention, as shown in FIGS. 2 and 3, before the sheet S2 reaches the dissolving solution 28, a means is taken to remove the patterns on both sides of the sheet along the feeding direction. In the figure, reference numeral 36 is a squeegee for performing such removal, which faces the surface of the suction roll 24 and works in cooperation with the surface to scrape off the ink of the pattern.

The squeegee may be provided not only on the suction roll 24 as described above, but also on the guide member 30 and the reversing roller 22, or may be provided on other members.

In addition, the squeegee is formed into a plate shape from synthetic resin, rubber, metal, etc. Also, the squeegee 36 is not plate-shaped but is provided as a roll to adjust the circumferential speed of the roll and a member that supports the sheet, such as the circumference of the suction roll 24. The pattern may be scraped at different speeds.

Here, the ink scraped off by the squeegee 36 accumulates in front of the squeegee, but this is sucked in and removed by, for example, a suction tube (not shown). In this way, the sheet S2 that has passed through the squeegee 36 floats on the liquid surface in a state as shown in the fourth figure, and no curl A occurs at the both side ends C.

The reason why curling can be prevented by removing the ink on both sides C of the sheet as described above is that the S2 thin film
When it comes into contact with the thin film, there is a difference in elongation between the front and back sides due to swelling, and when it should be curled A as shown in Figure 1, if the ink on both sides is removed and only a thin film remains, there will be no difference in elongation between the front and back sides. It is thought that curling is prevented because both sides C of the sheet are pulled toward the liquid surface side by the surface tension of the liquid. However, even in the above embodiment, both sides of the belt C
Since the thin film contacts the liquid from the lower surface and swells from the lower surface, there is a possibility that a difference in elongation will occur between the front and back surfaces, and a roll A may occur at the initial stage of contact with the liquid. In order to prevent such problems, as shown in Figure 3, after removing the pattern on both side edges C of the sheet and before the sheet starts to swell on the surface of the solution, the solution is applied to the thin film surface exposed above. It is preferable to swell the thin film portion beforehand. The solution may be supplied, for example, by a nozzle 38 as shown, or by a coating roll (not shown).

Now, in the present invention, as described above, the ink on both sides of the sheet is removed before the sheet is placed on top of the solution, so the sheet does not curl on the liquid surface as in the conventional method. Therefore, according to the present invention, there is no disturbance of the sheet pattern due to curling, so that the transfer can be performed accurately and the cartridge can be used efficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a sheet that has been curled by a conventional transfer method. FIG. 2 is a schematic side view of an apparatus for carrying out an example of the method according to the present invention, and FIG. 3 is a perspective view illustrating the main steps of the method according to the present invention. FIG. 4 is a perspective view of a sheet obtained on the liquid surface by the transfer method according to the present invention. Sl, S2... Seat, A...
Curl, B...Transfer position, C...゜゛゜・Both sides of sheet, 24...Suction roll, 28...
...Dissolution solution, 32...Transferred material, 36.
... Squeegee, 38 ... Nozzle.

Claims (1)

[Scope of Claims] 1. A printed pattern support sheet supporting a desired transferably activated pattern on one surface of the thin film is fed onto the solution of the thin film, and the solution is poured onto the solution while the solution is flowing. In the method of transferring the pattern onto the sheet by applying the pattern to the sheet, before bringing the printed pattern support sheet onto the surface of the dissolving liquid, the paper is placed on both sides of the sheet along the feeding direction. A transfer method characterized in that the pattern is removed to prevent the sheet from curling when it comes into contact with a dissolving liquid. 2. The transfer method according to claim 1, wherein the pattern is removed using a squeegee. 3. A printed pattern support sheet that supports a desired transferably activated pattern on one surface of the thin film is fed onto the solution of the thin film, and while the solution is flowing, the object to be transferred is placed on the solution. In the method of transferring the above-mentioned pattern to a transfer material by applying the pattern to a sheet, the pattern at both ends of the sheet along the feeding direction is removed, and then, before the sheet starts to swell on the surface of the solution, the pattern is By applying the solution to the thin film part visible from the removed part of the pattern,
A transfer method characterized in that the sheet is prevented from curling on the liquid surface.