JPS62109687A - Transfer sheet for thermal transfer copying machine - Google Patents

Abstract

PURPOSE:To facilitate an arbitrary image forming, by a method wherein a transfer sheet consists of an ink film having a hot-melt wax layer and a transfer film which is subjected to a laminating treatment at the surface thereof facing the wax layer and made to adhere to the film. CONSTITUTION:A transfer laminated film 71 consists of a base film 76 made of a film of polyester film etc., a thin layer 77 made of Surlyn resin, and an intermediate layer 78 of polyethlene etc. formed to enhance the adhesion between the base film 76 and the Surlyn resin thin layer 77. The transfer sheet 7 consists of the transfer laminated film 71 and an ink film 74 adhering thereto. Copying operation forms a transferred image on the transfer film 71, thus resulting in a wax image 79 formed on the resin layer 77. The wax image 79 is a normal image when viewed from the direction of the base film 76.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer sheet for use in a thermal transfer copying device.

Electrophotographic copying machines, such as the Karabe Selection (i) and Carlson methods, are widely used, but they are large, heavy, noisy, and expensive, and they are not suitable for miniaturization or portability. It is not suitable for commercialization or price reduction. In addition, even if the material to be transferred is designated paper or general plain paper is possible, if it is sheet-like and has folds or missing parts, problems will occur mainly in paper transportation, and booklets such as notebooks and notebooks will It was not possible to obtain copies of the originals, and attempts were made to cut and paste them, but these had the disadvantages of being unsightly and becoming thicker.

(IT), a small copying device for plate making and printing using a flash bulb has also been proposed, but in most cases the amount required to obtain copies is one or several, and the cost of clothing and
Including the cost of bulb lamps, etc., the unit cost of copying becomes very expensive and is not practical. Furthermore, many of these plate-making and printing machines have the disadvantage that, due to their structure, the original must be in the form of a sheet or a single-sided original.

(■) Furthermore, in recent years, small digital copying machines that use a document reader and a recording printer have been proposed, but in order to maintain a high level of image quality, the pixels must be made extremely fine. However, it has become expensive.

Copying machines have been widely used as office machines, but they are all installed on the floor, on a desk, or on a special stand, and when you want to make a copy, you have to leave the copying machine behind. It had to fit to a certain point.

In view of the above-mentioned circumstances, the present applicant first proposed a device that can be easily carried around and can be stored in a bag or pocket. We have proposed a portable copying machine that is small, very inexpensive compared to conventional copying machines, and has high quality copied images.

FIG. 3 is a partially cutaway perspective view for explaining an example of a portable copying device previously proposed by the present applicant. In the figure, 1 is a portable copying device, and the i-copying device 1 is As shown in the figure, from the top of the device, there is an electrical control unit 2 with electronic components installed on a board;
An operating section 3 including display lamps and switches, a charging section 4 mainly consisting of a capacitor that stores the emitted energy of a flash lamp, a light emitting section 5 consisting of a flash lamp 51, a reflector 52, etc., and a translucent section that brings the original and copy sheet into close contact. The light-transmitting platen portion 6, which includes a platen plate 61, a light-transmitting buffer member 62, and the like, are arranged in a substantially laminated manner.

FIG. 4 is a side sectional view showing an example of a transfer sheet suitable for use in the portable copying device, and FIG. 5 is a partially exploded perspective view. In the figure, 7 is a transfer sheet; is a transparent plastic film 71 which is a transfer body, and a base 72 similar to the transparent plastic film 71, and a wavelength-selective transparent and heat-melting wax in which coloring agents such as dyes and pigments are dispersed. Ink film 74 provided with layer 73
A frame 75 is used as necessary.

Examples of the plastic film include polyethylene, polyethylene terephthalate, polypropylene, polyvinyl chloride, polyvinylidene chloride, nylon, etc., and examples of the wax include beeswax.

Candelilla wax, carnauba wax, montan wax, etc., as well as paraffins, low-molecular synthetic resins, etc. can be used. In addition, as for the film thickness, as an extreme example, a glass plate several times thick can be used as the transfer material.
10-20071 in terms of practicality (operability, cost, etc.)
Furthermore, a plastic film of about 40 to 60 μm is used. Since the ink film base is used as a heat transfer layer during copying, a thin layer is preferable; if it becomes thick, not only high energy is required, but also the sharpness of the image deteriorates. Practically speaking, 3 to 67 zm is used including the production of ink film. If the ink film wax layer is thin, a sufficient image cannot be obtained; if it is too thick, the transmittance is poor, high energy is required, and 'bleeding' occurs.
2 to 6 μm is suitable. As a light source, a halogen lamp, a tungsten lamp, etc. can also be used. However, the shorter the heating time of the wax layer, the sharper the image will be maintained.
Flash exposure using a high-output xenon lamp (emission time of 2 to 3 m5 ec or less) is desirable. If the heating time is too long, the heat will be transmitted to parts of the document that do not correspond to the printed lines, resulting in poor sharpness. However, halogen lamps, tungsten lamps, etc. have the advantage of simplifying the electrical system.

-4= FIG. 6 is a diagram for explaining a copying method when copying information (image area 81) on a document 8 using the copying device 1 and transfer sheet 7. A copy sheet 7 is stacked on top of the original 8 with the ink film side facing the original, and the copying apparatus 1 is placed on top of the copy sheet 7 with the platen 6 in close contact with the copy sheet 7. Copying device 1 is commercial 100V
Connected to a power source or charging battery, the flash charging capacitor is charged to a preset partial level. The platen, the copy sheet, and the original are uniformly pressed against the surface of the copy sheet by the weight of the device 1 and the pressure applied through the device 1. When the flash lamp trigger switch is turned on in this state, the flash lamp emits light and the original is exposed to light through the platen and the copy sheet. At this time, some of the light is also absorbed by the copy sheet, especially the ink film wax layer, and generates heat, which is used as a thermal bias. The image area 81 on the document generates heat due to light absorption, and this heat is transmitted to the wax layer through the base of the ink film and melts the wax. Melted wax is transfer body 7
When the device 1 is removed and both films 71 and 72 of the transfer sheet are peeled off, a wax image corresponding to the image area of the original is obtained on the transfer body 71. This image is a normal image when viewed from the transfer body side, and this film may be used as a copy image as it is, or may be pasted on a notebook or the like as necessary. The energy of the light emission comes from the platen.

It depends on the spectral characteristics of the copy sheet etc. and the light emitting characteristics of the lamp, but it also depends on the type of document. For example, line images using pigments such as carbon or long wavelength absorption colors require low energy, but dye-based High energy is required for colorants and long wavelength reflective colors. Furthermore, if more energy than necessary is applied, the periphery of the image may melt, resulting in poor sharpness, or the wax may flow due to surface tension, causing hollow spots in the image. Therefore, the charging energy for light emission is, for example, 0.8 to 2,5
It is variable within the range of Joule/ci. Further, since the image on the obtained transfer body is heat-fusible, it can also be thermally transferred to notebooks, notebooks, cloth, etc. using an iron or other heat source. These paper, cloth, etc.

There is no problem with transferring to materials that can be impregnated with molten wax, but when transferring to glass plates, plastic films, etc., applying heat and pressure with an iron, hot roller, etc. may cause the molten wax to flow between the transfer object and the transferred object. It leaks and bleeds into the image. In such a case, flash exposure is still effective, and it is sufficient to stack the transfer bodies so that the ink image faces the side of the transferred body, place the device 1 in the same manner as above, and emit light while applying pressure. However, in this case, heat generation due to light absorption of the wax layer itself is utilized, so for example, 1
．． 5 to 2 times higher energy f! It requires cursing.

Purpose The present invention relates to a transfer rate suitable for use in a thermal transfer copying device as described above, and particularly relates to a transfer rate using a laminate film as a transfer sheet and an ink film closely adhered to the laminate film. It is an object of the present invention to provide a transfer film which can be laminated by heat-pressing a wax image obtained on the laminate film by a copying operation onto a photograph, card, etc. using a transfer sheet consisting of the following. However, it will be easily understood from the following description that the transfer sheet according to the present invention is applicable not only to the portable thermal transfer copying device but also to ordinary copying devices.

■--Two In order to achieve the above object, the present invention provides a transfer sheet constituted by an ink film having a heat-melting wax layer provided on a plastic film, and a transfer film made of a plastic film closely adhered to the ink film. The transfer film is characterized in that a surface of the transfer film facing the wax layer is laminated. Hereinafter, the present invention will be explained based on examples.

FIG. 2 is a side view showing the structure of a general laminate film. In the figure, 76 is a base film, and the base film 76 is made of, for example, a polyester film. 7
7 is a thin layer of Surlyn resin, 78 is the base film 7
6 and the Surlyn resin layer 77. In the present invention, a film having such a structure is used as a transfer film 71 and an ink film 74 shown in FIG. The sheets are brought into close contact to form a copy sheet as shown in FIG.

FIG. 1 shows the laminate film (transfer film) 7
1 shows the state when a copied image is obtained. When a transferred image is obtained on a transfer film 71 by a copying operation, the transferred image is coated with wax on a resin layer 77, as shown at 79 in the figure. An image 79 is obtained, which is a normal image when viewed from the base film side. Although the melting temperature of the wax is lower than that of the resin layer, it partially melts due to the heat generated on the document. The molten part is welded with wax,
In other image areas, a wax image is formed on the laminate film by welding the wax by thermal transfer.

The laminate film with the wax image 79 obtained as described above is placed in close contact with the wax image side on, for example, a photograph or card in the same manner as a normal laminate, and then
The laminate is finished by passing it between a pair of hot pressure rollers heated to about 200°C to 200°C. Since the wax is compatible with the resin of Laminate 1-, clear images can be obtained without melted wax bleeding.

Effects It is clear from the above explanation that according to the present invention, any image can be easily obtained using a laminated film, and by laminating the film on another object, any image can be easily obtained. can be re-incorporated into a laminate.

[Brief explanation of drawings]

FIG. 1 is a side view of a transfer sheet according to the present invention when a transferred image is obtained on a transfer film, FIG. 2 is a side view showing an example of a general laminate, and FIG. 3 is a side view of a transfer sheet according to the present invention. FIG. 4 is a partially cutaway perspective view for explaining an example of the portable copying device proposed earlier; FIG. 4 is a side sectional view showing an example of the transfer sheet; FIG. 5 is a partially exploded perspective view of the transfer sheet; FIG. FIG. 6 is a diagram for explaining how to use a copying apparatus in which a transfer sheet is used according to the present invention. DESCRIPTION OF SYMBOLS 1... Copying device, 2... Electrical control section, 3... Operating section, 4... Charging section, 5... Light emitting section, 6... Platen section, 7... Transfer sheet, 8...Manuscript, 71...
Transfer film (laminate film), 74... Ink film. Patent applicant: Ricoh Co., Ltd. Figure I Figure 5

Claims (1)

[Claims] In a transfer sheet composed of an ink film having a heat-melting wax layer provided on a plastic film, and a transfer film made of a plastic film in close contact with the ink film, a surface of the transfer film facing the wax layer is laminated. A transfer sheet for a thermal transfer copying device characterized by being subjected to the following.