JPH11291602A - Method and device for formation of solid pictorial art calligraphy utilizing heat-sensitive copying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a formation method for forming not only a letterpress printing base paper but also a solid pictorial art calligraphy by the heat-sensitive copying method using a hot surface movable material and also provide a device thereof. SOLUTION: A pictorial art calligraphy image is drawn by using a heat- sensitive ink composed mainly of optical absorption fine particles on the surface of a hot surface movable material of rich light reflection properties or by using a light reflecting coating material on the surface of the hot surface movable material coated with heat-sensitive ink, and an image surface is emitted by a light source 41 of high strength for the emission time based on the threshold value of emission durable time of the light source for a light non-absorbing member, and an exposing section of light absorbing fine particles is demonstrated as a recessed section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of generating a three-dimensional document which has been developed from the generation of a relief printing master by thermal copying, and has pioneered a new method which has not existed in the past.

[0002]

2. Description of the Related Art Conventionally, thermal copying is a technique which has been mainly employed for producing a printing original plate. FIG. 5B shows a stencil in which the original shown in FIG. 5 is image-represented as a set 59 of fine perforations in a stencil material 56 of a thermoplastic resin film. There is a relief in a broad sense in which the original image shown is represented by a height difference in the thickness direction. The relief plate in a broad sense includes a relief plate in which an image is represented by a convex portion 60 on a relief printing plate material 61 and an intaglio plate which is represented by a concave portion.

With respect to small stencils, home stencil stencils and the like, which have already been put into practical use and are best known, have become widespread. It is also used in silk printing original plates and stamping plates.
Regarding the method of producing the original plate, a flash irradiation method mainly including near infrared rays has been put to practical use.

That is, in the case of a stencil master, an image is drawn on a backing paper with a heat-sensitive ink (hereinafter, abbreviated as a heat-sensitive ink) containing light-absorbing fine particles as a main component, and this is brought into close contact with the stencil master material to irradiate a flash. A method in which only the light-absorbing fine particles generate heat by utilizing the difference in light-absorbing characteristics between the light-absorbing fine particles and the non-image portion of the mount, and a portion of the stencil material that is in close contact with the image portion is melt-punched. It is.

However, when a high-intensity incandescent lamp rich in infrared rays is used, the light absorbing characteristics of the image portion drawn with the thermal ink and the light absorbing characteristics of the blank backing sheet are not so different. When the light is absorbed and heat is generated, the white paper is also heated. Due to the heat generated by the mount, the image quality of the image formed on the stencil material deteriorates, so that it cannot be put to practical use.

On the other hand, in the near-infrared ray having a shorter wavelength than the infrared ray,
Due to the remarkable difference between the light absorbing properties of the light absorbing fine particles and the white paper, a high-intensity flash bulb containing abundant near-infrared rays has been adopted and practically used. The reason why a high-intensity light beam is used is to provide a required amount of heat in as short a time as possible in order to efficiently generate a plate by reducing loss accompanying diffusion of heat from the light-absorbing fine particles.

Recently, a digital perforated plate making method using a thermal head (not shown) widely used in a thermal printer of a personal computer can increase the efficiency of the plate making by connecting with a personal computer and communication. , And are suitable for expressing an image as a collection of minute dot holes.

FIG. 6 is an exploded partial sectional view showing an example of a known small stencil printing machine. In the figure, reference numeral 50 denotes a flash irradiator. The flash irradiator 50 accommodates a parabolic reflecting mirror 53 in a main body 51, and an electronic flash discharge tube 52 is disposed at the focal point of the reflecting mirror 53. This high-intensity light source charges a capacitor (not shown) with high-voltage charges, and can generate a high-intensity flash rich in instantaneous near-infrared light from the electronic flash discharge tube 52. A part of this light beam is reflected
Then, the reflected light becomes parallel rays, and passes through the plate glass 55 at the opening of the flash irradiator 50 together with the remaining rays to irradiate the object.

Reference numeral 54 denotes a table having a smooth surface. A mount 58 on which an image 59 is drawn with thermal ink is placed on the base 54, and a transparent sheet 56 of a stencil material for stencil printing made of a thermoplastic plastic having a thickness of about 3 μ (hereinafter abbreviated as a stencil material 56 for stencil). And the upper surface thereof is pressed against the plate glass 55 of the opening of the flash irradiator 50 and pressed.
8 and the stencil material 56 are brought into close contact with each other and flash light is applied.
The light is absorbed by the light-absorbing fine particles in the heat-sensitive ink of the image 59, and the light-absorbing fine particles generate heat.

In order to apply the structure of the small stencil printing machine to a large stencil printing machine, a large-capacity capacitor, a large flashlight bulb, a reflecting mirror capable of uniformly irradiating a large area, and a material for making the original and the stencil material closely adhere to each other. A sheet glass or the like that can withstand a large load is required, and there are many difficulties in increasing the size by this method. Therefore, it has not yet been realized as a product.

The method using a thermal head is not suitable for a large plate making machine because the mechanism is complicated.

Further, in the case of a relief plate in a broad sense, a thin resin film (hereinafter, referred to as a cell), which encloses fine bubbles, is laminated even though it is the same thermoplastic resin as compared with a stencil which perforates a thermoplastic resin film having a thickness of the order of 3 μm. The energy required to melt and break the thin resin film from the surface of the high-density foam to several layers of cells increases by orders of magnitude. Therefore, from the viewpoint of supplying light energy to the light-absorbing fine particles,
It is preferable that the total energy is not applied instantaneously but is continuously applied for a predetermined time.

As in the case of the stencil, when the material for the printing original plate and the original image are separately adhered to each other and pressed by the plate glass of a flash irradiator to a letterpress plate making machine, the light absorbing fine particles of the original image are used. However, even if the cells on the surface of the printing plate material in the close contact area are melted and eroded, it is impossible to follow the eroded area and further advance the melt erosion of the cells in the next layer, so that an image representation with a sufficient height difference cannot be obtained. There is a problem.

Further, it is difficult to secure the necessary amount of heat by simply reducing the resolution of the original plate generated by transmission loss, irregular reflection, heat transmission, and the like when a light beam passes through a mount, a plate glass, or the like. There is also a problem.

Considering the application of the thermal head to the relief printing, firstly, the thermal capacity is insufficient, and the structure is suitable for generating thermal dots in a plane, and is unsuitable for expressing by a height difference. It is.

Under these circumstances, there has been no suitable plate-making method for practical use of a relief plate in a broad sense by the heat-sensitive method.
Therefore, there was no plate making machine.

[0017]

The inventor of the present invention has previously described (Japanese Patent Application No. 9-31803) an image 59 drawn with a heat-sensitive ink as a mirror image on the surface of a letterpress master material.
Alternatively, by directly drawing the image 59 with the thermal ink,
The plate glass 55 and the transparent mount 58, which have been conventionally used for overlapping the original printing material and the image 59 so as to be in close contact with each other, are eliminated, so that the transmission loss caused when the irradiation light passes through the transparent body and the light accompanying the heat transfer. The light-absorbing fine particles absorb light and generate heat on the surface of the printing plate material, excluding a decrease in the heat generation efficiency of the absorbing fine particles, a decrease in resolution due to reflection and heat transfer, and directly generate high-density foaming. A plate making method was proposed to produce small plates by melting and eroding the thermoplastic resin of the body.

Further, with the recent development of the material, the surface of the foamed material having fine foamed cells is excellent in light reflectivity, and the light is focused to about 4 cm square by a 500 W-class spotlight with an internal reflecting mirror which is rich in infrared rays. Materials have been produced that can withstand irradiation times as long as 2-4 seconds for light rays and do not leave thermal effects on the surface. This irradiation time is defined as an endurance threshold of irradiation of the spotlight on the surface of the foam material (hereinafter, this irradiation time is abbreviated as an irradiation endurance threshold).

In addition, during the time within the durability threshold of the irradiation, the condensed light beam causes the light-absorbing fine particles in the heat-sensitive ink on the surface of the foamed material to generate heat and melts and erodes the thin resin film of the foam that comes into contact. It continued to move to the skin of the new cell in the thickness direction of the material, and it was confirmed that the difference in height in the practical range was generated.

Moreover, since the inside of the thin resin film is air having high thermal insulation, the amount of heat transmitted to the surroundings through the resin film is extremely small. Therefore, the erosion area is hardly expanded in the plane direction (hereinafter, this property is referred to as a hot surface movement property, and a material having this property is referred to as a hot surface movement material).

The characteristics of the hot surface movement can be well understood by comparing the state of the iron plate with the surrounding snow and ice when the heated iron plate is placed on the snow and on the ice, respectively. Since snow is the accumulation of water crystals, it contains a large amount of fine air bubbles in the snow and approximates a foamed structure of a thermoplastic resin. Ice, on the other hand, is a homogeneous individual.

The heated iron plate placed on the snow melts the snow crystals that are in direct contact, and the molten water generally falls downward. Since the bubbles contained in the snow have high heat insulation properties, the propagation of heat to the snow around the iron plate in the horizontal direction is slight. Therefore, it can be observed that a recess having the same cross-sectional shape as the iron plate is generated and sinks.

On the other hand, an iron plate placed on ice melts the contacting ice, and the water accumulates around the iron plate. This water transfers heat from the hot plate to the surrounding ice. Heat is also transferred to the ice below the iron plate. For this reason, it can be observed that the iron plate has a thermal effect on the ice around and below, and a thin pan-bottom concave portion is formed around the iron plate and sinks.

The above-described example of snow is a property that approximates a material capable of moving on a hot surface. In addition, the light-absorbing fine particles are on the surface of the material capable of moving on the hot surface and generate heat when irradiated with high-intensity light rays, so that the thin resin film of the foamed resin cells is directly melted and eroded in the same manner as the heated iron plate on snow. I do. Moreover, since the light-absorbing fine particles are always on the eroded surface, the ability of the molten erosion does not deteriorate even in repeated light irradiation. Further, since there is little thermal influence on the periphery of the image part, an image with a clear resolution and a clear boundary at the heat-affected part and the non-heat-affected part is generated.

The present invention intends to provide a letterpress generation method which has not been realized conventionally by utilizing the above findings. In addition, the present invention not only paves the way for the generation of relief printing masters by thermal copying, which was impossible in the past, but also facilitates the generation of seal engraved characters. It seeks to provide a new way of expressing beauty that cannot be found.

[0026]

According to a first aspect of the present invention, a document image is formed on a surface of a heat-transferable material having excellent light reflectivity with a heat-sensitive ink. The image forming surface of the document of the surface movable material is irradiated with a high intensity light beam for an irradiation time based on a threshold of the irradiation time of the surface of the hot surface movable material, and the image portion of the document is expressed as a concave portion. Like that.

According to the first aspect of the present invention, an image of a document formed on the surface of the hot-surface-movable material includes a light from a high-intensity light source, and a threshold value of the surface irradiation time of the hot-surface-movable material. By repeating the irradiation within the irradiation time within, it is possible to make the image portion a concave portion having a depth corresponding to the number of times of irradiation without leaving a thermal effect on the non-image portion of the heat-surface movable material. It has the potential to open the way to a new artistic means of expression as a high-resolution three-dimensional calligraphy.

The second means of the present invention corresponds to claim 2, wherein the surface of the material capable of moving on the hot surface is coated with a heat-sensitive ink, an image of a document is formed with a light-reflective coating material, and the image surface is formed. The high-intensity light source irradiates the light-reflective coating material with an irradiation time based on a threshold value of the irradiation time, and attempts to express the thermal ink portion as a concave portion.

According to the second aspect of the present invention. The heat-sensitive ink portion is melted and eroded by the heat of the light-absorbing fine particles, leaving a writing portion having strong light reflectivity, thereby forming a concave portion by forming a concave portion by forming a concave portion by forming a three-dimensional document image portion.

The third means of the present invention corresponds to claim 3,
Instead of the heat-surface-movable material coated with the thermal ink used in the second aspect, a heat-surface-movable material foamed by kneading light-absorbing fine particles is used.

According to the third means of the present invention, similarly to the second means of the present invention, the image of the document formed by the light-reflective coating material remains as a convex portion, and the exposed portion of the light-absorbing fine particles is exposed. Represents a three-dimensional representation of a concave portion.

A fourth means of the present invention corresponds to claim 4,
In the first, second and third means, a persistent light source is used as the high intensity light source.

According to the fourth means of the present invention, since the irradiation time is not restricted, the combination of the irradiation time and the number of times can be freely set as described in the first, second and third means of the present invention. Because it can be selected, it is extremely potential as a means of artistic expression.

The fifth means of the present invention corresponds to claim 5,
The high-intensity light source used in each of the first, second, and third means of the present invention illuminates a composite light source of a continuous light source next to a flash light source in time series.

According to the fifth means of the present invention, a flash line having little heat influence is first applied to a light-reflective material, so that a boundary between an image part and a non-image part is sharp with a particularly high resolution. Boundary. Moreover, since the hot surface moves sequentially in the thickness direction as a characteristic of the hot surface movable material,
Switching to a persistent light source does not compromise the resolution of the surface. Therefore, it is a suitable combination especially for a relief original plate having a good resolution.

The allowable range of the light-absorbing fine particles contained in the image formed on the surface of the material capable of moving on the heat surface is wide, and the minimum amount is the light-absorbing fine particles that have absorbed the light rays 24 and generated heat. It is sufficient that the heat is transferred to the thin thermoplastic resin film of the foam of the material capable of directly moving on the hot surface and melted and eroded, and the amount is extremely small. Actually, a clear image can be expressed even in a very small amount so that no contrast occurs between the image and the non-image portion.

The maximum is not so much affected by the rate of melt erosion even when the surface becomes black so that the surface becomes black like a foam formed by kneading light-absorbing fine particles with styrene resin. . In short, it is not preferable that the light-absorbing fine particles, which absorb light and generate heat due to the deposition of the light-absorbing fine particles having poor heat conductivity, are separated from the resin thin film surrounding the cell by other light-absorbing fine particles.

As a means for distributing the light-absorbing fine particles so as to satisfy the above-mentioned conditions in the image area, there is a method of transferring an image drawn on an adhesive-coated backing sheet to the surface of a heat-transferable material. The image drawn with the thermal ink on the backing coated with the adhesive material has a light-absorbing fine particle that accumulates and creates a contrast with the backing, so the shape can be clearly identified,
Only the layer constituting the upper surface of the deposited light absorbing fine particles is transferred to the surface of the heat-surface movable material,
The adhesive appropriately controls the amount of the light-absorbing fine particles transferred to the surface of the heat-surface movable material.

The high-density foam is a vinyl thermoplastic resin in a broad sense such as an olefin synthetic resin such as polyethylene and polypropylene, a vinyl chloride synthetic resin, polystyrene, vinyl chloride, and a vinylidene chloride copolymer synthetic resin. A material having a closed cell structure with a cell diameter of 0.02 to 0.5 mm foamed to an expansion ratio of 5 to 50 times, a material having a corresponding open cell structure, a material having a cellular structure such as wood and bamboo, fibers, and the like Is a structural material that is bundled together.

A characteristic common to the above-mentioned materials is that they have the characteristics of a material capable of moving on a heat surface, so that an image can be expressed with a difference in elevation with an extremely small amount of heat generation as compared with a solid material. In addition, this is an important characteristic in securing the resolution of an image.

The light-absorbing fine particles may be fine particles having a particle size of 10 μm or less and capable of sufficiently absorbing mainly light rays having a wavelength of 0.5 μm to 10 μm to generate heat. Metallic particles such as pigments and silver bromide are also suitable.

The heat-sensitive ink containing light-absorbing fine particles as a main component includes, in addition to the black pigment-based heat-sensitive ink, a solid ink such as a pencil.

The light reflectivity refers to a state of the surface which reflects light and has little thermal influence upon irradiation of the surface with light. In general, a white surface has good light reflectivity for light having a short wavelength up to near infrared, but light having a wavelength in the infrared region has little difference from light absorbing fine particles. In order to enhance the light reflectivity, it is also a good method to increase the reflectivity of the surface by depositing a material having excellent light reflectivity or applying it as a paint.

The light-reflective coating material refers to paper, resin material, paint, metal, or the like exhibiting a surface state excellent in light reflectivity, by covering or applying an image portion drawn with heat-sensitive ink or the like. It is a material used for the purpose of giving light reflectivity to the coated part.

[0045]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an example of an embodiment of the present invention. FIG. 2 is a sectional view taken along line AA of FIG.

In the figure, reference numeral 1 denotes a housing. The housing 1 has a drum 3 rotatably supported at both ends by bearings 12 and # 13 with the central axis 4 of the cylindrical portion 2 being horizontal. The bearing 12 and the bearing B13 are supported by a support member fixed to the housing 1.

The drum 3 has a cylindrical portion 2 having a large number of air holes 5 on its outer periphery, one end of which is sealed with an end plate 6 and an end plate 9 provided with an exhaust port 11 at the other end. A rotating shaft 7 having an axis coinciding with the central axis 4 of the cylindrical portion 2 and an end plate releasing shaft 10 project out of the bearings 6 and 9, respectively.
2. Supported by bearing # 13. A sealing material 8 is fixed to both ends of the outer periphery of the cylindrical portion 2.
Cushion material 14 made of a foamed resin of communicating cells
Is wound and fixed, and the outer periphery and the inside of the cylindrical portion 2 of the drum 3 communicate with each other via the communication bubble and the ventilation hole 5. The outer diameters of the sealing material 8 and the cushioning material 14 are substantially the same.

A drive motor 17 for the drum 3 supported on a support 19 fixed to the housing 1 is directly connected to the end of the rotary shaft 7 on the closed end side of the drum 3. An exhaust fan 16 driven by an exhaust motor 18 supported by a support base 20 fixed to the housing 1 is disposed at the opposite open end 10 so as to operate within the exhaust port 11 of the drum 3. I have.

A feed screw 2 that is longer than the entire length of the drum 3 in a position parallel to the center axes of the rotating shafts 7 and 10 of the drum 3 at a position away from the outside of the cylindrical portion 2 of the drum 3 in the housing 1.
1 and a guide 22 are provided. The feed screw 21 is rotatably supported by the housing 1 via bearings 28, 28, and the guide 22 is supported by the bearings 28, 2.
8 to the housing 1.

The feed screw 21 is rotatably screwed into a screw hole 26 passing through a guide table 25, and the guide 22 is slidably connected to a sliding portion 27 of the guide table 25. The guide table 25 has a high intensity light source 23 on the drum 3.
Is supported at the height of the rotating shaft 7.

A feed screw motor 29 is connected to one end of the feed screw 21. The feed screw motor 29 is supported by a support 30 fixed to the housing 1. By driving the feed screw 21, the guide table 25 can smoothly move the high-intensity light source 23 from one end of the drum 3 to the other end along the central axis 4 of the cylindrical portion 2. The power of the high intensity light source 23 is
And the guide table 25 are connected to the electric wires 34 via a flexible cord (not shown) and supplied from a power source (not shown).

A controller 33 is provided between the drive motor 17 and the feed screw motor 29 via a signal line 32 to receive a signal of the rotation sensor 31 of the drive motor 17 and the drive screw 17 and the feed screw motor 29. The rotation of the motor 29 is controlled so that a predetermined rotation ratio is obtained.
The drive motor 17, the feed screw motor 29, and the exhaust motor 18 are all supplied with electric power from power supplies (not shown) via electric wires 34, 34.

A suction port 35 is provided near the outer peripheral surface of the drum 3 irradiated with the condensed light beam 24, and is supported outside the high intensity light source 23 of the guide table 25. A communication pipe 38 is connected between the suction port 35 and the exhaust fan 36 via a filter 37 for the combustion gas of the master material 15 for letterpress. Electric power is also supplied to the exhaust fan 36 via the electric wires 34, 34.

Next, the operation will be described. 1 and 2, when the exhaust motor 18 is driven, the inside of the drum 3 is depressurized by the exhaust fan 16 which rotates in the exhaust port 11, and at the same time, the air outside the cylindrical portion 2 passes through the cushion member 14 and the air from the vent hole 5 to the cylindrical portion. It is sucked into the part 2.

By wrapping non-breathable or highly breathable paper or the like around the cushion material 14, the cushion material 14 can be easily fixed by the difference between the external atmospheric pressure and the pressure in the drum (hereinafter simply referred to as suction fixing). . The seal member 8 is provided to prevent air from communicating with the inside of the drum from the side surface of the cushion member 14 for communicating bubbles.

By utilizing this principle, polyethylene is chemically cross-linked as a material 15 for a relief printing plate precursor made of a thermoplastic resin sheet of high-density foam having a high light-reflecting surface characteristic, and has an expansion ratio of 30 and an average cell diameter of 0. An image 59 is drawn with a thermal ink on the surface of a 400 mm × 400 mm plate having a thickness of 6 mm of a 2 mm independent foam (trade name: Softron Board CTW of Sekisui Chemical Co., Ltd.) and the cushion on the cylindrical portion 2 of the drum 3 It was wound around the material 14 and fixed by suction.

The high-intensity light source was condensed to an irradiation length of 4 × 4 cm square by a 500 W spotlight with an internal reflecting mirror. In addition, the peripheral speed of the drum 3 is 4 cm / sec, and the high intensity light source 23 is practically used by feeding the drum 3 at a pitch of 4 cm / rotation of the drum 3 in the direction of the rotating shaft 7 of the drum 3 (hereinafter referred to as feed 4 cm / rotation). The result is that a typical version can be obtained. Based on the above findings, in this apparatus, the rotation of the feed screw motor 29 was controlled so that the peripheral speed of the drum 3 was 4 cm / sec and the feed was 4 cm / rotation.

The drum 3 is rotated by the drive motor 17 under the above conditions, and the high-intensity light source 23 is fed and moved from one end to the other end of the drum 3 in conjunction with the rotation. The melt erosion collapsed and the image 60 was formed as a concave image.

The state of the intaglio original plate material 15 is such that the boundary between the image portion and the non-image portion has a sharp boundary, the depressed portion is clear and very good, and the non-image portion generates heat to some extent due to absorption of the irradiation light. Even after the light beam passed, even if irradiation was repeated a plurality of times due to the cooling effect associated with the rotation of the drum, cooling was performed each time, so that there was no variation such as shrinkage due to the influence of heat and the sound was sound. The gas component generated at the time of melting and sinking is sucked through the suction port 35 and filtered by the filter 37, so that there is no possibility that the surroundings will pollute the environment such as bad smell.

FIG. 3 is a perspective view showing a second embodiment of the present invention, and FIG. 4 is a sectional view taken along line BB of FIG. 3 and 4
In the three-dimensional document generator 40, a high-intensity light source 41 is provided with a grip 42, and a conducting wire 43 is connected to a power source from a rear end of the grip 42 via a switch (not shown). The light source was focused on an irradiation area of 4 × 4 cm by a 500 W spotlight with an internal reflecting mirror.

The oil on the upper surface of the hot surface movable material 45 was carefully removed, and the characters 46 were drawn as the image with a thermal ink (using commercially available ink). In the image paying portion 47, a faint portion was intentionally provided.

When the entire surface is irradiated while the condensed light 44 is moved at a speed of about 4 cm / sec while the handle 42 is held over the image 46 while holding the handle 42 in the hand, the light-absorbing fine particles in the heat-sensitive ink are It moves sequentially in the thickness direction of the heat surface movable material 45. In this manner, the blurred portions 48 and 49 of the characters drawn with the thermal ink as shown in FIG. 4A are also melted and eroded to substantially the same depth as other character portions as concave portions as shown in FIG. 4B. I could express three-dimensionally including the part.

As a third embodiment of the present invention, a commercially available styrene brick black, which is obtained by kneading carbon fine particles as light-absorbing fine particles into styrene resin in place of the heat surface movable material 45 in FIG. Material used.

Using a white pen (light-reflective white paint) on the upper surface of the heat-surface movable material, a character 4 as an image is used.
I drew 6.

By applying the condensed light 44 within the threshold of the irradiation time of the light-reflective paint of the image of the heat-surface-movable material, the non-image portion of the heat-surface-movable material containing the light-absorbing fine particles is reduced. The character 46 as an image is melted and eroded and the blurred portion 4
8 and 49 were generated as projections.

In the first embodiment of the present invention, the high-intensity light source 23 has been described as a single light source. However, the number of light sources 23 is not limited to one, and a plurality of light sources may be provided as necessary.

Although the exhaust fan 16 is provided at the open end of the drum 3, the position is not limited to this. If the pressure reducing means can reduce the pressure inside the drum 3 to a required pressure, its mounting position, type, and Regardless of the mounting method.

The light source 2 having a high intensity is linked to the rotation of the drum 3.
Although the example in which the drum 3 is moved in parallel with the rotating shaft 7 of the drum 3 has been described, the high-intensity light source 23 may be fixed, and the drum 3 may be moved in the direction of the rotating shaft 7 simultaneously with the rotation.

To form a stencil by forming an image on a printing stencil material for stencil, the thickness of the stencil material is 3 μm.
This is a problem of setting the conditions for selecting the irradiation time in consideration of the thin film.

In the second embodiment of the present invention, only a persistent light source is used as a high-intensity light source. First, a high-intensity flash with very little thermal effect is used to melt and erode the image portion from the surface of the hot-surface-movable material, and then a high-resolution image representation can be achieved by using a persistent light source. This characteristic is particularly effective when applied to a letterpress master.

As can be seen from the fact that the splash portion of the character or the blurred portion of the pressing portion is represented by a height difference, when the light absorbing fine particles are dispersed at intervals, the thermal effect is affected by the dispersion density. There is a difference in elevation difference. In other words, the sparse portion becomes shallower than the densely dispersed portion, and a portion in which melt erosion does not occur occurs in the sparse portion.

In the third embodiment of the present invention, a light-reflective paint is used. However, it is sufficient that the light-reflecting paint is blocked to prevent the light-absorbing fine particles from absorbing light and generating heat. May be used. As described above, the object can be achieved with a light-reflective coating material. Of course, changes can be freely made without departing from the scope of the present invention.

[0073]

The present invention has the following effects.

The image of the heat-sensitive ink was formed directly on the relief printing plate material, and the conventional means for closely adhering the printing relief material to the backing on which the image was drawn was unnecessary. A plate-making machine with a simple mounting structure is possible, in which the letterpress material is fixed to the outer periphery of the cylindrical portion of the drum with a uniform load, regardless of the size of the letterpress material.

A mechanism for rotating the drum and relatively moving the high-intensity light source in the direction of the rotation axis of the drum is possible because a condensed light beam of a high-intensity incandescent lamp that can be continuously irradiated can be used instead of the flash light irradiation. With the simple configuration of the combination of the above and the interlocking control thereof, it is possible to irradiate the entire surface of the material for letterpress original plate, and it is possible to produce an inexpensive large-size plate making machine which is not restricted by the size of the plate.

By forming an image directly on the surface of the material capable of moving on the hot surface, the plate making efficiency can be significantly improved. By manually driving the rotation of the drum and the relative movement of the light source in the direction of the center axis of the drum, the irradiation time and irradiation frequency can be locally and intentionally changed based on the threshold of the irradiation time of the plate itself. The possibility of three-dimensional art expression was developed.

By using a heat-sensitive ink and a light-reflective coating material on the surface of the material capable of moving on the heat surface, it is possible to express a complicated height difference and a surface state by combining the irradiation time and the number of times of irradiation. .

Since the expression of a complicated height difference is possible, it can be used as a teaching material for a visually impaired person.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a plate making machine according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view of a three-dimensional document generation machine according to the present invention.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a front perspective view showing an example of a stencil; b is a front perspective view showing an example of letterpress.

FIG. 6 is a perspective exploded partial cross-sectional view of a conventional flash irradiator for a stencil printer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Cylindrical part 3 Drum 4 Center shaft 5 Vent hole 7 Rotating shaft 10 End plate open end 11 Exhaust port 12 Bearing 13 Bearing １４ 14 Cushion material 15 Material for letterpress original plate 16, 36 Exhaust fan 17 Drive motor 18 Exhaust motor 19 Support base (drive motor) 20 Support base (exhaust motor) 21 Feed screw 22 Guide 23 High intensity light source 24 Condensed light beam 25 Guide table 29 Feed screw motor 31 Rotation sensor 33 Controller 35 Suction port 37 Filter 38 Communication pipe 41 High-intensity light source 42 Handle 44 Condensed light beam 45 Hot-surface movable material 46 Document image 47 Leafy part of character 48 Shaded part of character 49 Shaded part of character 50 Flash illuminator 51 Main body 52 Electronic Flash Discharge Tube 53 Reflector 54 Unit 55 Plate Glass 56 For Stencil Printing Edition timber 58 mount 59 image

Claims (7)

[Claims] An image of a document is formed on a surface of a heat-transferable material having excellent light reflectivity with a heat-sensitive ink, and an image-forming surface of the heat-transferable material is moved by a high-intensity light source. A method for generating a three-dimensional document by thermal copying, characterized by irradiating for an irradiation time based on a threshold value of the irradiation time on the surface of a possible material and expressing an image portion of the document as a concave portion. 2. The surface of a heat-surface movable material is coated with a heat-sensitive ink, an image of a document is formed with a light-reflective coating material, and the image surface is irradiated with the light-reflective coating material by a high-intensity light source. A method for generating a three-dimensional document by a thermal copying method, wherein the thermal irradiation is performed with an irradiation time based on a time threshold, and a portion of the thermal ink is represented as a concave portion. 3. The three-dimensional document according to claim 2, wherein the material is a heat-transferable material formed by kneading light-absorbing fine particles and foaming in place of the heat-transferable material coated with the thermal ink. Generation method. 4. The method according to claim 1, wherein the high-intensity light source is a persistent light source. 5. The three-dimensional document according to claim 1, wherein the high-intensity light source uses a composite light source consisting of a flash light source and a continuous light source in time series. Etc. generation method. 6. An apparatus for producing a three-dimensional document including a hot-surface movable material and a high-intensity light source capable of irradiating an image surface formed on the surface of the hot-surface movable material. 7. An apparatus for producing a three-dimensional document by a thermal copying method, comprising a high-intensity light source capable of irradiating an image surface formed on a material capable of moving on a hot surface and a guide for guiding the light source.