JPS62112150A - Portable copying device - Google Patents

Abstract

PURPOSE:To press effectively a surface to be exposed by applying the whole dead load of a copying device to the surface to be exposed through a platen part. CONSTITUTION:The copying device consists of an exposure light source part, an exposing electrical device control part and a platen part abutted upon the surface to be exposed to constitute an contact and pressing surface and the approximately whole surface of a bottom is used as an exposing surface. The platen part 6 is constituted of a plastic platen plate 61 and a buffer member 62 consisting of a transmissive air bag or a transmissive sponge and positioned on the lowermost layer and the whole weight of the copying device 1 is applied to the surface to be exposed. Consequently, the weight of a capacitor can be utilized as a part of a pressing function and the dead load of the copying device 1 is utilized, so that pressing force from the external can be reduced.

Description

TECHNICAL FIELD This invention relates to portable copying devices, and more particularly to portable thermal transfer copying devices.

Conventional technology (j): Electrophotographic copying machines, such as the Carlson method, are widely used, but they are large, heavy, noisy, and expensive. It is not suitable for lowering prices, etc. In addition, even if the transfer material is designated paper or general plain paper is possible, if it is in sheet form and there are folds or missing parts, problems will occur mainly in paper conveyance, and it will not be possible to transfer the paper to No. 1 or the notebook. It is not possible to obtain copies of booklet-like items such as the following, and we are trying to cope with this by cutting and pasting.
It has disadvantages such as being unsightly and increasing thickness.

(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 have been proposed that use a document reading reader and a recording printer; 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 dedicated table, and when you want to make a copy, you have to put it down. I had to go somewhere.

In view of the actual situation such as ``double series'', 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. 4 is a partially cutaway perspective view for explaining an example of a portable copying device previously proposed by the applicant.

In the figure, 1 is fS? 4. In the Obikawa copying machine, the copying machine 1 is.

As shown in the figure, from the top of the device, there is an electrical control section 2 with electronic components installed on the board, an operation section 3 including indicator lamps, switches, etc.
．． 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 reflecting plate 52, etc., a translucent platen plate 61 that brings the original and copy sheet into close contact, and a translucent buffer member 62 Translucent platen portions 6 and the like are arranged in a substantially laminated manner.

FIG. 5 is a side sectional view showing an example of a copy sheet 1- suitable for use in the portable copying device, and FIG. 6 is a partially exploded perspective view, in which 7 is a copy sheet; Copy sheets 1 to 7 are
A translucent plastic film 7 which is an intermediate transfer body;
Base 7 similar to the translucent plastic film 1171
2 and an ink film 74 on which a wavelength-selective transmitting and heat-melting wax layer 73 in which colorants such as dyes and pigments are dispersed are closely attached, and 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 an extreme example, a glass plate several meters thick can be used as the intermediate transfer body, but the thickness of the film may vary depending on 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 becomes thick, not only high energy is required but also the sharpness of one image deteriorates. Practically speaking, the total thickness of the 12 ink films used is 3 to 6 μm. If the ink fill 11 wax layer is thin, a sufficient image cannot be obtained, and if it is too thick, the transmittance will be poor, high energy will be required, and "bleeding" will occur easily, so 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 xenon lamp for a short time (e.g., light 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, in the case of halogen lamps, tungsten lamps, etc., the ``FL system'' has the advantage of being simplified.

FIG. 7 is a diagram for explaining a copying method when information (printing area 81) on a document 8 is copied using the copying device 1 and the copy sheet 7. First, the document to be copied is 8'' Place the copy sheets 7 on top of each other with the ink film side facing the original, and place the copying device 1 thereon with the platen portion 6 in close contact with the copy sheets 7. Copying device 1 is a commercial too
The flash charging capacitor is charged to a preset potential level when connected to a V power source or a charging battery. 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 pressure applied via the device J. If the flash lamp trigger switch is turned on in this state, the flash lamp will emit light.
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 of the document is completely heated by light absorption, and this heat is transmitted to the wax layer through the base of the ink film 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 71 and 72 of the copy sheet are peeled off, a wax image corresponding to the image area of the original is obtained on the intermediate transfer member 71. This image is a normal image when viewed from the intermediate 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 light emission varies depending on the spectral characteristics of the platen, copy sheet, etc., and the light emission characteristics of the lamp, but it also changes depending on the type of rtva.
For example, low energy is required for line images and long-wavelength absorption colors that use pigments such as carbon, but high energy is required for dye-based colorants and long-wavelength reflection 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.
It is variable in the range of 8 to 2.5 Joule/a.

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 cases, flash exposure is still effective, and if you overlap the intermediate transfer bodies so that the ink image faces the transferred object, place the device 1 as in -J2, and make it emit light while applying pressure. good. However, in this case, since the heat generated by light absorption of the wax layer itself is utilized, energy 1.5 to 2 times higher than in the above case is required, for example.

In the above-mentioned thermal transfer copying device, the exposed surface transfers heat through the film and transfers melted wax from one surface to the other, so the film and document are in close contact with each other. In order to improve adhesion, it is necessary to apply a certain amount of pressure to the surface to be exposed.

Purpose The present invention was made in view of the above-mentioned circumstances.
In particular, the purpose of this invention is to provide a portable copying apparatus that can effectively apply pressure to the surface to be exposed.

Structure In order to achieve I-, the present invention has an exposure light source section, an exposure electronic control section, and a platen section that comes into contact with the surface to be exposed and forms a close pressure surface. In a portable copying device where almost the entire surface is the exposure surface.

The present invention is characterized in that the entire weight of the copying apparatus is applied to the surface to be exposed via the platen section. Hereinafter, the present invention will be explained based on examples.

FIG. 1 is a block diagram of main parts for explaining an embodiment of the present invention, namely, a charging section 4, a light emitting section 5, and a light emitting section 5 of the copying machine shown in FIG. And -1, 1 in 2 figures showing the platen part 6
, 12 are side plates of the copying apparatus 1. In the middle of the side plate 12, light emitting members such as a xenon lamp 512 and a reflection plate 52 are housed. The platen section 6 is composed of a plastic platen plate 61 and a buffer member 62 made of a translucent air pack, a translucent sponge, etc., and is located at the lowest layer of the copying apparatus 1. or can be added to the surface to be exposed.

In this way, according to the present invention, all of the self-reflection force of the copying device is applied to the exposed surface, so less pressure is needed to be applied from the outside to bring the film or original into close contact. It is possible to obtain stable adhesion with no misalignment.

FIG. 2 is a main part configuration diagram for explaining another embodiment of the present invention. In FIG. 1, 63 is a light shielding member for preventing light from a flash lamp from leaking to the outside during copying. Other parts having the same functions as the embodiment ' shown in FIG. 1 are given the same reference numerals as in FIG. 1.

FIG. 3 is a diagram showing a graph of the illuminance distribution in the length direction of the lamp 51, but this illuminance distribution is one example, and
The length of the lamp can be varied depending on the shape of the reflector. Further, it is also possible to partially change the transmittance of the platen plate 61, or make it a milky white plate or have a roughened surface to read the light quickly. The same thing can be done with the buffer member 62, and if an air bag in which air is sealed in a light-transmitting plastic film is used as the buffer member 62, it is sufficient to manipulate the plastic film. 6 In order to use the scattering of light to correct the illuminance distribution, the thicker the scattering layer, the better, and 5 it is generally more effective if it is placed at a position away from the exposure surface. Therefore, in the copying apparatus 1, the platen plate 61 is designed not only to function as a pressure plate against the surface to be exposed, but also to be an effective member for correcting uneven illuminance. In particular, regarding the correction of the decrease in illuminance at the edges, in addition to the two measures, the inner surface of the light-shielding plate 63 is not a light-absorbing surface, but is vapor-deposited with aluminum to obtain a mirror surface so as to obtain a high reflectance. I have to.

Effects As is clear from the above description, according to the present invention, stable contact between the copying device and the surface to be exposed can be obtained.

Further, the weight of the capacitor required for flash light emission is not wasted, and one of the capacitors can be used as part of the pressurizing function of the copying machine. Furthermore, since the copying machine's own weight is utilized, there are advantages such as the ability to reduce external pressure.

[Brief explanation of drawings]

1 and 2 are main part configuration diagrams for explaining the present invention in detail, FIG. 3 is a diagram showing an example of the illuminance distribution in the length direction of the flash lamp, and FIG. FIG. 1 is a partially cutaway perspective view for explaining an example of a portable copying device previously proposed by the present applicant. FIG. 5 is a side sectional view showing an example of a copy sheet, FIG. 6 is a partially exploded perspective view of the copy sheet, and FIG. 7 is a diagram for explaining how to use a copying apparatus to which the present invention is applied. It is a diagram. DESCRIPTION OF SYMBOLS 1... Copying device, 2... Electrical control section, 3... Operation section. 4...Charging part, 5...Light emitting part, 6...Platen part,
7... Copy sheet, 8. Original, 11.12... Side plate,
51...Flash lamp, 52...Reflector plate 261
. . . platen plate, 62 . . . buffer member, 63 . . . light shielding plate. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a portable copying device that has an exposure light source section, an exposure electronic control section, and a platen section that comes into contact with the surface to be exposed and forms a close pressurizing surface, and where almost the entire bottom surface is the exposure surface, the self-weight of the copying device A portable copying apparatus characterized in that the entire portable copying apparatus is configured to be applied to a surface to be exposed via the platen section.