JPS62106442A - Portable copying device - Google Patents

Abstract

PURPOSE:To make the illuminance distribution of a face to be exposed uniform by constituting a platen part, which is placed between an exposure light source and a part to be exposed, essentially with a platen plate and a buffer member and providing this platen part with a light diffusing layer. CONSTITUTION:The exposure part consists of a light emitting part 5 and a platen part 6, and a light emitting member consisting of a xenon lamp 51, a reflecting plate 52, etc. is stored in side plates 11 and 12 of a copying device 1. The platen part 6 consists of a light-transmissive platen plate 61 and a buffer member 62 like a light-transmissive air bag, a liquid bag, or a light-transmissive sponge. In such a case,the light diffusing layer is provided on at least either the platen plate or the buffer member.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a portable copying device, and more particularly to a technique for making uniform the illuminance distribution on an exposure surface in a thermal transfer type portable copying device.

Prior art (i) Electrophotographic copying machines, such as the Carlson method, 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 lowering prices, etc. 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.

(ii) In addition, a small copying device for plate making and printing using a flash bulb has been proposed, but the amount required to obtain copies is often 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.

(iii) 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 traditionally been widely used as office machines, but they are all installed on the floor, desk, or a special table, and when you want to make copies, you have to leave the copying machine behind. I had to go to a certain place.

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 developed a portable copying machine that is small, very inexpensive compared to conventional copying machines, and has high quality copies.

FIG. 3 shows that the present applicant previously published IJ, 1. This is a partially cutaway perspective view for explaining an example of the proposed portable copying device.
Reference numeral 1 denotes a copying machine for mobile phone 111, and the copying machine 1 includes, as shown in the figure, an electrical control unit 2 with electronic parts incorporated in a board 2, and operating units such as indicator lamps and switches. 3,
A charging section 4 and a flash lamp 5, which mainly consist of a capacitor that stores the flash lamp's emitted energy.
1. A light emitting section 5 consisting of a reflecting plate 52, etc., a translucent platen plate 61 for bringing the original and copy sheet into close contact, a translucent platen section 6 consisting of a translucent buffer member 62, etc., are arranged in a substantially laminated manner. There is.

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; -7 is a wavelength-selective transparent and heat-melting film in which colorants such as dyes and pigments are dispersed on a transparent plastic film 71 which is an intermediate transfer body, and a base 72 similar to the transparent plastic film 71. An ink film 74 provided with a wax layer 73 is attached to the frame 75 as necessary.
is used.

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 with a thickness of several mans can be used as the intermediate transfer member, but it may be difficult for practicality (operability).

10 to 200 μm and even 40 to 60 μm in terms of cost, etc.)
A plastic film of about μm size is used. Since the ink film base is used as a heat transfer layer during copying, a thin layer is preferable; if it is thick, not only will high energy be required, but the sharpness of the image will deteriorate. Practically speaking, a length of 3 to 64 m including the ink film manufacturing department is used. If the ink film wax layer is thin, it will not be possible to obtain a sufficient image, and if it is too thick, the transmittance will be poor, high energy will be required, and blemishes will easily occur.
2 to 6 μm is suitable. As a light source, a halogen lamp, a tungsten lamp, etc. can also be used. However, since the shorter the heating time of the wax layer, the sharpness of the image is maintained, flash exposure using a high-output Cannon lamp for a short time (e.g., light emission time of 2 to amsec 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.

FIG. 6 is a diagram for explaining a copying method when information (image area 81) on a document 8 is copied using the copying device 1 and the transfer sheet 7. The copy sheet 7 is placed on top of the copy sheet 7 with the ink film side facing the original, and the copying apparatus is placed on top of the copy sheet 7 so that the platen portion 6 is in close contact with the copy sheet 7. Copying device 1 is a commercial 100v
Connected to a power source or charging battery, the flash charging capacitor is charged to a preset potential level. The platen portion, the copy sheet, and the original document are uniformly pressed against the surface of the copy sheet by the weight of the mounting N1 and the pressure applied via 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 section and the copy sheet 1. 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 8.1 of the document-L generates heat due to Solo absorption, and this heat is transmitted to the wax layer through the base of the ink fill 11 and melts the wax. The melted wax is fused to the intermediate transfer member 71, and when the device 1 is removed and both films A7] and 72 of the transfer sheet are peeled off, the intermediate width transfer member 7 is removed.
1. A wax image corresponding to the image area of the x draft is obtained.

This image is a normal image when viewed from the intermediate transfer member side, and this film may be used as a copy image as it is, or may be pasted onto No. 1 or the like as necessary. The energy of emitted light varies depending on the spectral characteristics of the platen, the copy sheet 1, etc., and the light emitting characteristics of the lamp, but it also changes depending on the type of document. In the case of color, low energy is required, but in the case of dye-based colorants and long-wavelength reflective colors, high energy is required. Furthermore, if more energy than necessary is applied, the periphery of the image may melt, resulting in poor sharpness, or flow due to the surface tension of the wax may cause voids in the image. Therefore, the charging energy for light emission is, for example, 0, 8-2, 5 Joule/cy.
It is variable within the range of l. Furthermore, since the image on the intermediate transfer member obtained is heat-fusible, it can also be thermally transferred to notebooks, notebooks, cloth, etc. using an iron or other heat source. There is no problem with transferring to materials that can be impregnated with molten wax, such as paper and cloth, but when transferring to glass plates, plastic films, etc., heat and pressure with an iron, hot roller, etc. will cause the molten wax to transfer to the intermediate transfer. It leaks between the body and the transferred body and bleeds into the image. In such a case, flash exposure is still effective, and it is sufficient to stack the intermediate 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, the heat generated by the absorption of light by the wax layer itself is utilized;
For example, 1.5 to 2 times higher energy is required than in the above case.

-P-1 The present invention is a further improvement of the portable copying device mentioned in 1. In particular, when copying is carried out by pressing the platen portion of the portable copying device against the surface to be exposed and making a close contact with it. This was done for the purpose of making the illuminance distribution on the exposed surface uniform.

Configuration In order to achieve the above-mentioned object, the present invention has a document exposure light source and an exposure electrical equipment control section, and components of the copying device f' such as an electrical equipment control section are disposed above the exposure light source. The 4W copying apparatus is used by placing the document on the original so that substantially the entire bottom surface becomes the exposure area, and the platen part is located between the exposure light source and the exposed part, The platen section mainly consists of a platen plate and a buffer member provided below the platen plate, and is characterized in that at least one of the platen plate and the buffer member has a light diffusion layer. Hereinafter, the present invention will be explained based on examples.

FIG. 1 is a block diagram of the main parts for explaining one embodiment of the present invention, that is, an enlarged view of a fog light section consisting of a light emitting section 5 and a platen section 6. In the figure, 11.12 is a copying machine 1. Inside the side plate 12, light emitting members such as a xenon lamp 51 and a reflector 52 are housed. Platen part 6
is composed of a translucent platen plate 61 and a buffer member 62 made of a translucent air bag, a liquid bag, a translucent sponge, or the like. 63 is a light shielding member.

FIG. 2 is a diagram showing the illuminance distribution in the length direction of the lamp in the copying apparatus, in which W is the width of the light shielding plate 63;
2 is the opening width of the platen plate 61.

Figure 2 (A) is a diagram showing an example of a case where the illuminance distribution is made uniform by the shape of the reflector and the position of the lamp.In this case, the illuminance decreases at both ends and increases in the center. The distribution is not very favorable. In order to achieve further uniformity by changing the shape of the reflector, the position of the lamp, etc., it is necessary to make the shape of the reflector more complicated, or to increase the distance between the exposed surface and the reflector/lamp. Figure 2 (B) shows that when the platen plate 61 is made opalescent or has a roughened surface, the platen plate 61 is made into a diffuser plate that scatters light. FIG. 2 is a diagram showing an example; in this case, the illuminance distribution is somewhat lower at both ends, but is more uniform than in the example shown in FIG. 2(A).

However, the overall illuminance becomes low, and the exposed area becomes narrow.

In FIG. 2(C), only the central portion of the platen plate 61 is made milky white or has a roughened surface to scatter light, and the illuminance in the central portion is reduced while maintaining the illuminance at the end portions of the example shown in FIG. 2(A). lower,
This is an example of uniform distribution throughout. In this example, the second
Compared to the example shown in Figure (A), the illuminance distribution is more uniform,
In addition, unlike the embodiment shown in FIG. 2(B), the illuminance does not decrease at both ends, and the illuminance equivalent to that in FIG. 2(A) is obtained, so the exposure area is not narrowed and good exposure is achieved. can be obtained.

Effects As is clear from the above explanation, according to the present invention, the illuminance distribution on the surface to be exposed can be made uniform, and in particular, in order to achieve uniform illumination by changing the shape of the reflector and the position of the lamp, the above-mentioned method is necessary. However, the light diffusing layer can be made uniform without these drawbacks, and fine adjustment is also possible.

[Brief explanation of drawings]

FIG. 1 is a block diagram of main parts for explaining an embodiment of the present invention, and FIG. 2 is a diagram showing the illuminance distribution on the exposure surface. Third
The figure is a partially cutaway perspective view for explaining an example of a portable copying device previously proposed by the applicant, FIG. 4 is a side sectional view showing an example of a transfer sheet, and FIG. 5 is a copy sheet FIG. 6 is a partially exploded perspective view for explaining how to use the copying apparatus to which the present invention is applied. 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, 11.12
...Side plate, 51...Light source lamp, 52...Reflector plate, 61...Platen plate, 62...Buffer member, 63...
... Light shielding plate. Figure 3 Figure 4, 71 7 堝 ========yo

Claims (1)

[Claims] It has an original exposure light source and an electronic control section for exposure, and components of the copying device such as the electrical control section are arranged above the exposure light source, and the document is placed on the document so that substantially the entire bottom surface of the copying device becomes the exposure area. A portable copying apparatus used in a portable copying machine, which has a platen part located between the exposure light source and the exposed part, and the platen part mainly includes a platen plate and a buffer member provided below the platen plate. A portable copying apparatus comprising: a light diffusing layer on at least one of the platen plate and the buffer member.