JPH0514628B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing a transfer sheet, and more particularly to a method for producing a transfer sheet by forming a transfer image by electrophotographic copying.

[Prior art]

Conventionally, the following methods are known as transfer methods for appropriately forming an image on the surface of an article using a transfer sheet.

That is, as shown in FIG. 1, on a base 1 such as paper or film sheet that has been given release properties in advance, a gravure printing method etc. is performed using polyvinyl chloride as a base material and ink colored with pigments, dyes, etc. A transfer sheet 3 is prepared by printing a transfer image 2 with an appropriate pattern, and the transfer image 2 of the transfer sheet 3 is placed on the surface of a transfer object 4 such as a cabinet made of synthetic resin as shown in FIG. 2, for example. A so-called hot-melt method is known in which the surfaces are brought into close contact and the transferred image 2 is transferred and fixed on the surface of the transfer target 4 by heat and pressure, and then the base 1 is peeled off as shown in FIG.
In addition to the method of applying heat and pressure, there is also a method of using water or the like, as in the case of transferring decorative patterns on plastic models.

By the way, printing on paper or film sheets imparted with the above-mentioned releasability can also be performed by an electrophotographic copying method in addition to the gravure printing method.

As is well known, the electrophotographic copying method, generally called xerography, allows printing on a photosensitive plate, which is equivalent to a printing original plate, without requiring the complicated plate-making work that is required for normal printing. After creating a copy by developing and transferring the electrostatic latent image with toner,
The electrostatic latent image is erased from the photosensitive plate, and the same or a different electrostatic latent image can be formed on the photosensitive plate again, if desired.

Therefore, this method is most suitable for creating a small number of transfer sheets, for creating a large number of sheets but wanting to create some of them first, or for checking the finished state of the transfer sheet.

FIG. 4 is a side cross-sectional view showing the general configuration of the electrophotographic copying machine. In order to create a transfer sheet using this copying machine, paper 6 (hereinafter referred to as A copying machine is operated to form a fixed toner image on the release paper 6 which is a mirror image of the original 7, thereby forming a transfer sheet. To create an image that is a mirror image of the original, either use a prism mirror as the in-mirror lens (not shown) in the copying machine, or create an image on a transparent film and then turn it over. This can be done by using it as a manuscript.

However, when creating a transfer sheet using this electrophotographic copying machine, the basis weight of the release paper is approximately 50
g/m ² compared to regular copy paper (grammage approximately 70 g/m ² ), and the paper is less stiff, so the left and right ends of the release paper tend to sag and curl while the paper is running. However, paper jams frequently occur within the copying machine, and the machine has to be stopped each time to remove the jammed release paper. Moreover, if a paper jam occurs in the fixing section, the release paper will burn, creating a risk of fire.

[Purpose of the invention]

As a result of intensive research to eliminate and improve the above-mentioned drawbacks of the prior art, the inventors of the present invention surprisingly found that they used a sheet-like release paper with a vertical grain, and that the longitudinal grain direction of the release paper and the copying machine We have obtained experimental results that when the release paper is set in the copying machine in the same running direction as the paper running direction, the curling phenomenon of the above-mentioned release paper during running is less likely to occur.

That is, the present invention was completed based on such experimental facts, and it is an object of the present invention to provide a method by which a transfer sheet can be stably produced by electrophotographic copying.

[Structure of the invention]

That is, the present invention is a method for creating a transfer sheet by electrophotographic copying, in which a sheet-like release paper with a vertical grain is used as a base of the transfer sheet, and when the release paper is set in a copying machine, the vertical grain of the release paper is The direction is the same as the paper running direction of the copying machine, thereby preventing the release paper from curling, increasing running stability, and improving productivity.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 5, a sheet-like release paper 8 with vertical grains is used as a base for a transfer sheet, and an electrophotographic copying machine shown in FIG. 4 is used. The paper cassette 5 was housed in such a manner that the paper traveling direction of the copying machine (direction of arrow A in FIG. 5) was the same as the longitudinal grain direction of the release paper 8.

Next, by operating the copying machine, a toner image that is a mirror image of the original 7 placed on the platen 9 is transferred to the release paper 8.
A transfer sheet was obtained.

Here, the release paper 8 is transported between the paper cassette 5 and the paper output tray 10 in the copying machine by a transport means such as a feed roll. The paper is under tension, and it is unclear whether this is the cause, but the paper becomes stiffer, and as a result, curling does not occur and paper jams are significantly reduced, and the occurrence rate of paper jams is approximately 1 in 1000 sheets. It became.

On the other hand, as shown in FIG. 6, a sheet-like release paper 8 with a grain pattern is stored in the paper cassette 5 so that its longitudinal direction is perpendicular to the paper running direction, and the copying machine is operated in the same manner. As a result, the paper curled and jammed about once every 30 to 40 sheets, probably because no tension was applied in the longitudinal direction.

Also, for the same reason, as shown in FIG. 7, the sheet-like release paper 11 with the cross grain was stored and operated so that the direction of the grain was perpendicular to the paper running direction.
Paper jams occurred about once every 50 to 80 sheets.

On the other hand, as shown in FIG. 8, when the sheet-like release paper 11 with the horizontal grain is stored and operated so that the direction of the grain is the same as the paper running direction, tension is applied in the direction of the grain. Yes, but because it is horizontally fed, the tension received is weaker compared to vertically grained release paper.30
A paper jam occurred approximately once every 40 sheets.

In the present invention, the "grain" of paper means the direction in which the fibers of the paper are oriented, and "long grain sheet paper" refers to paper whose "grain" is parallel to the long side of the sheet paper. Also, cross-grained sheet paper refers to paper whose "grain" is parallel to the short side of the sheet paper.

〔Effect of the invention〕

As described above, the present invention uses a sheet-like release paper with a longitudinal grain as a base of a transfer sheet, and sets the release paper in a copying machine so that the longitudinal grain direction of the release paper is the same as the paper running direction of the copying machine. Since the release paper is conveyed within the copying machine without curling, its running stability is high and the occurrence of paper jams can be significantly reduced.

Therefore, the practical effects of the present invention are great, such as being able to significantly improve the productivity of transfer sheets by electrophotographic copying, and also eliminating the risk of fire due to paper jams.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the transfer sheet, Figures 2 and 3 are process illustrations of the transfer method using this transfer sheet, Figure 4 is a side sectional view of an electrophotographic copying machine, and Figure 5 is a bookmarker. This shows an embodiment of the invention, and shows a plan view of a state in which release paper is stored in a paper cassette, and FIGS. 6 to 8 show plan views of a state in which release paper is stored in a paper cassette by a conventional method. Each is shown below. Code explanation, 5... Paper cassette, 6, 8,
11...release paper, 7...manuscript, 9...platen,
10... Paper output tray.

Claims (1)

[Claims] 1. In a method of creating a transfer sheet by forming a transfer image on a sheet of release paper using an electrophotographic copying method, a sheet of release paper with a vertical grain is used, and the vertical grain direction of this release paper is aligned with that of a copying machine. A method for producing a transfer sheet, comprising setting the release paper in a copying machine so that the release paper is in the same direction as the paper traveling direction.