JP2970800B2 - Stamp plate manufacturing methods and stamps - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a stamp printing plate. More specifically, without replenishing stamp ink for a long time by impregnating stamp ink,
The present invention relates to a method for producing a stamp plate made of a sponge material having open cells which can be repeatedly stamped, and a stamp.

[0002]

2. Description of the Related Art In order to save the trouble of attaching stamp ink to a stamp surface each time stamping or stamping is performed, a stamp material in which sponge rubber having open cells is used as a stamp material and ink is previously absorbed into the stamp material is known. Have been. Japanese Patent Application Laid-Open No. 60-193 discloses a method for producing the stamp.
Japanese Patent No. 686 discloses a method of manufacturing a stamp in which a portion other than the imprint forming portion of the sponge surface is depressed into a concave shape by heating embossing and compacted, and the convex portion serves as an imprinting portion as an imprinting portion. Japanese Patent Application Laid-Open No. 50-155323 discloses a method of pressing a porous body to a similar heating plate. However, these methods require a mold as a heating plate and the labor of engraving or etching characters, symbols, figures, and the like.

JP-A-57-136652 and JP-A-49-7003 disclose a method in which a photopolymerizable liquid resin is applied to the surface of a sponge stamp material, a positive sheet is placed on the upper surface, and ultraviolet light is irradiated from above. To cause a photopolymerization reaction,
A method for manufacturing a printing plate for removing unreacted resin by washing is disclosed, and Japanese Utility Model Laid-Open No. 52-71710 discloses a flat plate stamp using a negative film in the same manner.
However, these methods have a drawback that the steps such as preparation of a negative or positive film, application of a resin, photopolymerization, and washing with water are complicated. Also, Japanese Patent Application Laid-Open No. 3-96383 discloses that a stamp face is formed using a sponge stamp material. Further, Japanese Utility Model Laid-Open No. 50-41620 discloses a method of preparing a manuscript by resolving a manuscript based on a stamp having a photograph or a design having a gradation.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a method of producing a stamp plate for a stamp having open cells with a simple production process and apparatus. Another object of the present invention is to provide a stamp plate having a continuous bubble from which a clear imprint can be obtained. Still another object of the present invention is to provide a method for producing a halftone stamp printing plate having open cells, which facilitates production of a picture or a graphic having gradation.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to achieve the above object, and as a result, have placed a document on a stamp material having open cells via a heating plate, and illuminated the document with light. Irradiates the stamp ink to form a stamp ink exuded part and a non-exuded part, and further develops a similar method without using a heating plate. A method for producing a stamp printing plate having a high light transmittance, a method for producing a stamp printing plate having a gradation pattern using a halftone dot heating plate, and a stamp having the printing plate have been completed.

A first method for producing a stamp plate of the present invention is as follows.
A stamping material made of an elastic resin that has continuous cells and can be impregnated with stamp ink is printed through a heating plate containing a heating material whose temperature rises when exposed to light. Documents representing the same are superimposed on each other, the document is irradiated with light, and the temperature of the heat generating material at a portion corresponding to the recording material absence portion is increased by light transmitted through the recording material absence portion, and the temperature is increased. A stamp ink non-exuding portion is provided by melting the surface of the stamp material at a location corresponding to the heat generating material with the heat to block bubbles, and shields light in the recording material existing portion, thereby forming a recording material existing portion. By suppressing the temperature rise of the heating material at the corresponding location, and maintaining the surface of the stamp material at the location corresponding to the heating material with the suppressed temperature rise in a state where open cells are opened, the stamp ink Characterized in that the output section.

[0007] In a preferred embodiment of the first production method,
The following is shown. Documents in which characters and / or graphics are represented by a recording material absent portion and a recording material / existing portion include characters and / or graphics / existing portions (imprint original images) in a recording material / existing portion, and characters and / or graphics in a recording material absent portion. A pattern representing an existing portion, a pattern in which a recording material is absent, or a pattern in which shading is represented by a difference in dot density in a recording material existing portion, or the like. The heating plate containing the heating material that rises in temperature by being exposed to light is a sheet-like material made of a heating material containing carbon or a polymer, or at least one member selected from the group consisting of carbon and a polymer. It is preferably a sheet-like material in which a heat-generating material comprising ink or toner is applied to at least one surface of a sheet or the like that can transmit infrared rays. A heating material made of a heat-fusible material containing at least one selected from the group consisting of carbon and a polymer material and having a melting point higher than the melting temperature of the stamp material was applied to the entire surface of one side of an infrared-permeable sheet or the like More preferably, it is a sheet. The melting point higher than the melting temperature of the stamp material is usually about 60 to 150 ° C. Also, when producing a stamp printing plate having a pattern representing shades and the like, use a pattern representing shades due to differences in dot density as a manuscript, and the heating plate is formed from a group consisting of carbon and a polymer substance. It is preferable to use a sheet-like material in which at least one selected heat-generating material is arranged in a halftone dot form on a sheet that can transmit infrared rays. More preferably, the heating plate contains at least one selected from the group consisting of carbon and a polymer material, and a sheet or the like that can transmit infrared rays through a heating material made of a heat-fusible material having a melting point higher than the melting temperature of the stamp material. It is a sheet-like material arranged like a halftone dot.

[0008] A second method for producing a stamp plate of the present invention is as follows.
A heating material whose temperature rises by irradiating light onto a stamp material made of an elastic resin that can impregnate the stamp ink with open cells is superimposed on a document used as a recording material, and the document is irradiated with light. By increasing the temperature of the exothermic material existing portion in the original, forming a melted portion that closes the bubbles by melting the surface of the stamp material corresponding to the temperature-increased portion with the heat, thereby providing the stamp ink non-exuding portion and the original. In the above, the stamp material surface corresponding to the exothermic material absent portion where the light does not pass and the temperature does not rise is characterized by forming a non-melting portion for maintaining a state in which bubbles are opened to the surface to be a stamp ink exuding portion.

In a preferred embodiment of the second production method,
The following is shown. Documents that use a heating material that rises in temperature when exposed to light as a recording material are those that use ink or toner containing carbon or a high-molecular substance as a heating material, and have characters, graphics, and other existing parts created using this heating material. Alternatively, there is a material in which a non-existent portion such as a character or a figure is created by using the heating material. Further, it is preferable that the heating material is an ink or toner made of carbon or a polymer made of a heat-meltable substance having a melting point higher than the melting temperature of the stamp material. The sheet and the like and the sheet-like material in the present invention mean a film, a sheet or a plate.

[0010] In addition, preferred in the production method of the present invention are:
It is as follows. The stamp material made of an elastic resin capable of impregnating the stamp ink with open cells is a sponge sheet made of at least one member selected from the group consisting of natural rubber, synthetic rubber and synthetic resin; Has fine open cells having an average cell diameter of 2 to 10 μm having a three-dimensional network structure and a porosity of 30 to 80% and a melting temperature of 50 to 10
0.5 to 10 m of polyolefin foam at 0 ° C
m thick sheet. In addition, applying a liquid material to the manuscript, the liquid material is at least one selected from the group consisting of water, silicone resin, wax, mineral oil and vegetable oil, the light is a Xenon flash device containing at least infrared rays It is a flash with a photo strobe flash or flash valve as the light source, irradiating light with the stamp material compressed, irradiating light with the stamp material compressed, the surface of the stamp material melts into a concave shape and becomes unmelted The difference between the height and the height is 0.01 mm or more.

[0011] The stamp of the present invention is characterized in that the printing plate obtained by the method of the present invention is impregnated with stamp ink.

The stamp material used in the production method of the present invention may be any material as long as it is made of an elastic resin having open cells and capable of impregnating the stamp ink. Porous materials are preferred, and examples thereof include natural rubber, synthetic rubber-based sponge rubber, and synthetic resin foams such as polyethylene and polyurethane. Any shape may be used as long as the surface on which the imprint is formed is smooth, and a plate shape, a sheet shape, a film shape, etc. are shown. Preferably, it has a three-dimensional mesh structure having an average cell diameter of 2 to 10 μ fine continuous pores and an apparent density. 0.2-0.4 g / cm ³ , porosity 3
For a polyolefin foam having a melting point of 0 to 80% and a melting temperature of 50 to 100 ° C., a sheet having a thickness of 0.5 to 10 mm is used.

Light irradiation in the manufacturing method of the present invention uses light including infrared rays, and uses flash light using a xenon flash device, a photo strobe flash, a flash valve, or the like as a light source. At the time of light irradiation, it is preferable to apply pressure so that the thickness of the stamp material, which is the irradiation object, becomes 95 to 30% in order to increase the melting efficiency of the stamp material. It is preferable to compress the stamp plate obtained by plate making so that the step between the stamp ink exuding portion and the stamp ink non-exuding portion becomes 0.01 mm or more. By irradiating the stamp material in a compressed state, not only the surface of the stamp material but also the adjacent bubbles in the thickness direction can adhere and fuse to a certain depth on the surface layer. Become.
Although this irradiation energy depends on the size of the printing plate, it is greatly affected by the thickness of the original to be used. If not pressurized, large energy is required to completely close the open cells on the stamp material surface, which not only makes the apparatus expensive, but also affects the non-melted portion (stamp ink non-leached portion) of the stamp material. I cannot get a clear stamp.

A description will be given of an original in the first production method of the stamp printing plate of the present invention. The manuscript is a character or graphic, etc., represented by a recording material nonexistent portion and a recording material present portion. A character, graphic, etc. present portion (imprint original image) is represented by a recording material present portion, a recording material nonexistent portion. Represents a portion where characters, figures, and the like are present, and a pattern that represents shading due to a difference in dot density between a portion where a recording material is absent or a portion where a recording material is present. Further, a document having only a recording material present portion obtained by cutting a recording material non-existent portion (that is, a document fabric portion) can also be referred to as a document in the present invention. In particular,
An original image of characters, symbols, figures, etc., written, written, drawn, printed, copied, word-processor, typed, coated, glued, laminated, etc. on an original sheet such as paper, transparent film, PPC copy paper, etc. Therefore, a positive image or a negative image may be used as necessary. The recording material where the recording material is present may be any material that absorbs or reflects infrared rays, such as pencil, ink, toner, felt-tip pen ink, ballpoint pen ink, printing ink, paint, paint, and figures of characters. Shown are colored paper, foil of plastic or the like. The recording material absent portion corresponds to the fabric portion of the document sheet. The opaque document sheet is preferably a sheet that easily penetrates a liquid substance described later.

As a document having a gradation, characters, symbols, figures, and the like can be formed by a recording material such as ink or toner that absorbs or conceals infrared rays on a document sheet such as paper or a transparent film through which infrared rays can pass. The density is represented by the difference in dot density. For a photograph having a gradation, it is preferable to prepare an original to be used in the present invention by PPC copying. The paper and film used for the original sheet have high transmittance of infrared rays, and the dots of the drawing lines are preferably because the higher the efficiency of absorbing or blocking the infrared rays, the better the plate making efficiency. Normal,
It is preferable that a manuscript produced by a PPC copier is set as a standard. At present, PPC copiers are widely used in convenience stores, companies, schools, etc., so that general users can use them without failure, and there is no difference in the performance of infrared absorption of various toners. This makes it very convenient for general users to create original stamps by making originals made by PPC copying available as standard originals.
Further, failure due to the recording material of the document can be prevented.

The portion of the document where the recording material is absent is a portion corresponding to the material of the document sheet, and the more transparent the material. In the case of an opaque document sheet such as paper, it is preferable to irradiate light after penetrating a liquid material into the document. As a method of infiltration, a liquid material may be applied to the front and back of the original and then used. Also, the original may be placed on the glass plate of the flash light emitting part at the time of printing, and heat may be generated thereon in the case of the first manufacturing method. Before stacking the plates, in the case of the second manufacturing method, a liquid material may be applied to the original before stacking the stamp material thereon. The liquid substance may be any substance that penetrates the paper, such as silicone oil, and wrinkles are likely to be generated by drying. The liquid substance contains at least one kind selected from the group consisting of water, silicone resin, paraffin, mineral oil, and vegetable oil, and penetrates into original sheets such as paper and film, and is non-volatile at normal temperature. Both liquid and heated liquid are preferred. By penetrating the liquid material into the document sheet, the transmittance of infrared rays can be increased, and variations in the thickness of the document sheet can be absorbed to make the transmittance of infrared rays substantially uniform. Therefore, a clear printing plate can be obtained with a small amount of energy, that is, the efficiency of plate making is improved. When the liquid material is not applied, the transmittance of infrared rays is not constant due to the variation in the thickness of the original sheet, making stable plate making difficult, requiring the use of a limited number of sheets, which is inconvenient. More specifically, by applying a liquid substance to a manuscript produced by copying a PPC copy sheet with a PPC copy machine, the transmittance of infrared rays of the PPC copy sheet is increased, and variations in the thickness of the sheet are absorbed to make the PPC copy sheet almost uniform. Infrared light transmittance. Further, the present invention is not limited to a copy original, and the same effect can be obtained by applying the above-mentioned liquid substance similarly to an original written with a writing instrument such as a pencil or a felt-tip pen on a similar sheet or an original output by a printer. .

An original in the second method of manufacturing the stamp printing plate of the present invention will be described. The document is a document in which a heating material whose temperature rises when exposed to light is used as a recording material. That is, characters, figures, and the like are created using a heating material made of ink or toner containing carbon or a polymer substance, and non-existent parts are made with a heating material made of ink or toner containing carbon or a polymer substance. Is created. For example, a cutout of a sheet or the like containing a heating material made of carbon or a polymer substance is used to create a character, a figure, and the like, and a character, a figure, and the like, and a non-existence part. This can be created by cutting with a laser. . In addition, a sheet or the like that can transmit infrared rays using a heat-generating material as a recording material to create an existing portion such as a character or a graphic or a non-existent portion such as a character or a graphic is shown. In order to use the original as a document used in the second manufacturing method, it is necessary that the recording material in the document becomes a heating material whose temperature rises when exposed to light. Preferably, the recording material is a heat generating material composed of ink or toner containing carbon or a polymer substance, and more preferably, the ink or toner composed of carbon or polymer substance is composed of a heat-fusible substance.

The heating plate used in the manufacturing method of the present invention contains a heating material whose temperature rises when exposed to light. Specifically, at least one surface of a heating material made of ink or toner containing at least one selected from the group consisting of carbon and polymer materials, such as a sheet made of a heating material containing carbon or a polymer substance, is applied to at least one surface. A film, sheet or plate coated with a heating material made of a heat-fusible material containing at least one selected from the group consisting of carbon and polymer substances, such as an infrared-permeable sheet, over the entire surface on one side Can be. Here, the heating material containing a polymer substance may be any as long as the temperature is increased by infrared rays, and may include substances other than the polymer substance. Examples of the polymer substance include a polyolefin resin such as polyethylene, an acrylic resin, polyamide, polyvinyl acetal, polyvinyl alcohol, and polyvinyl acetate. The specific type of heating plate is carbon,
An example is a toner in which a toner for PPC copying made of a polyethylene resin or the like is uniformly fixed on the entire surface of a transparent PET film.

The heating plate having a heating material used in the method of the present invention arranged in a halftone dot (hereinafter referred to as a halftone heating plate) is a heating plate containing at least one member selected from the group consisting of carbon and polymer substances. Infrared transmission of heat-generating material consisting of heat-fusible material containing at least one selected from the group consisting of carbon and polymer substances, and a film, sheet or plate in which the material is arranged in a dot pattern on a sheet that can transmit infrared light Films, sheets or plates arranged in halftone dots on possible sheets and the like can be indicated. Specifically, a toner or ink containing at least carbon or a polymer substance is arranged in a dot pattern on a PET film, an acetate film, or the like. Specifically, a PPC copy made of a resin such as polyethylene or carbon black is used. Is formed by fixing a toner for printing in a halftone dot form, or printing and printing in a halftone dot shape with an ink composed of carbon black, an acrylic resin or the like. For example, halftone dots may be formed on a transparent film by gravure printing, silk printing, or the like as a heating material made of ink or toner made of carbon or a polymer substance. Hot-melt materials such as carbon black and wax,
A film, sheet, or plate which is hot-melt type formed with a solution of an organic solvent or a resin and is applied in a halftone dot shape can be used.

The heat-meltable substance used in the production method of the present invention contains at least one selected from the group consisting of carbon and polymer substances, and usually has a melting point higher than that of the stamp material by about 60%. It has a melting point of ~ 150 ° C. The heat-fusible substance is used as a substance in which a filler such as a colorant is dispersed and dissolved in an organic solvent, or a hot-melt type resin (hereinafter, referred to as a hot-melt ink). For example, the heat-meltable ink is used as a sheet (hereinafter, referred to as a heat-meltable ink sheet) applied to a heat-resistant film such as a polyester film. By selecting a colorant for the hot-melt ink, a stamp having a printing plate with a colorful printing surface can be obtained. The melting temperature of the hot-melt ink is higher than the melting temperature of the stamp material by 60.
１５０150 ° C.

An example of a method for producing a stamp plate of the present invention will be described. Example A. In the first manufacturing method of the present invention, a case where the recording material present portion is a character / graphic present portion and the heating plate is a sheet or the like containing carbon or a polymer substance will be described.
An original is superimposed on a stamp material made of an elastic resin capable of impregnating the stamp ink with open cells via a heating plate that rises in temperature by irradiating light, and the original is irradiated with light, and the original is irradiated with light. The temperature of the heat generating plate corresponding to the character / graphic absent portion is increased by light transmitted through the character / graphic absent portion, and the surface of the stamp material corresponding to the temperature-raised heat generating plate is raised. By dissolving with the heat and closing the bubbles, a stamp ink non-exuding portion is provided, and light is shielded at the portion where the characters and figures exist in the original, and the heat generating plate at the portion corresponding to the portion where the characters and figures exist is located. The temperature rise is suppressed, and the temperature rise is suppressed and the surface of the stamp material corresponding to the heat generating plate is maintained in a state where the continuous bubbles are opened, so that the stamp ink exudes. It is an. Referring to FIG. 1, a document M is superimposed on a stamp material S made of an elastic resin that has open cells and can be impregnated with ink via a heating plate T whose temperature rises by irradiating light. Irradiation of light, the non-existent portion B of characters and figures in the original M
The temperature of a portion of the heat generating plate T corresponding to the non-existent portion B of the document M on the heat generating plate T is increased by the light transmitted therethrough, and the surface of a portion of the stamp material S corresponding to the temperature rising portion of the heat generating plate T is heated by the heat. A non-ink bleeding portion H is provided by forming a molten portion by melting and closing the bubbles to form a non-ink bleeding portion H. At the same time, light is blocked at a portion L of the document M where characters and figures exist and a portion of the heating element T where characters and figures exist. The ink bleeding portion I suppresses the temperature rise at the portion corresponding to L, and maintains the state in which air bubbles are opened to the surface in the non-melting portion corresponding to the non-temperature rising portion of the heating element T in the stamp material S.

Example B. In the first manufacturing method of the present invention, a case where a recording material present portion is a character / graphic present portion and a heat-meltable ink sheet is used as a heating plate will be described. A hot-melt ink sheet is superimposed on the surface of a stamp material made of elastic resin that can be impregnated with stamp ink with open cells so that the hot-melt ink surface is in contact with the stamp. By irradiating light including infrared rays from above the original, a melted portion and a non-melted portion of the hot-melt ink are formed on the surface of the stamp material. The surface layer bubbles of the stamp material are intimately closed by the heat of the hot-melt ink while penetrating into the bubbles, so that the fused portion serves as a stamped ink non-exuding portion, and the non-melted portion serves as a stamped ink exuding portion. The stamped surface of the stamp material is formed by superimposing the hot-melt ink sheet so that the hot-melt ink surface is in contact with the stamp material surface, and then overlaying the original so that the imprint original image is a mirror image. When a flash containing infrared light is irradiated from above, the portion of the original other than the imprinted original image transmits the infrared light to reach the heat-meltable ink sheet, melts the heat-meltable ink and heats the surface of the sponge stamp material. The meltable ink penetrates into the bubbles of the stamp material, and the heat of the hot-melt ink melts and closes the bubbles in the surface layer of the stamp material, forming a portion where the stamp ink occluded in the stamp material does not flow. On the other hand, since the infrared image is not transmitted through the imprint document image portion of the document, the heat-fusible ink of the heat-fusible ink sheet is not affected and does not permeate or melt the stamp material. This non-melted portion is a portion where the ink absorbed in the stamp material oozes out. A stamped surface is formed by the fused portion and the non-fused portion, and a desired imprint is obtained from this portion at the time of stamping.

Example C. In the first manufacturing method of the present invention, the case where the liquid material is permeated into the original in Example A will be described. A heating plate made of at least one kind selected from the group consisting of carbon and a polymer material is superimposed on the surface of a stamp material made of an elastic resin that can be impregnated with a stamp ink having open cells, and furthermore, from a liquid absorbing opaque sheet. A desired original is infiltrated with a liquid substance so that the imprint original image is superimposed to be a mirror image, and then a flash including infrared rays is irradiated from the original side to correspond to a portion of the heating element other than the imprint original image. The portion generates heat and melts the stamp material surface to form a stamp ink non-exuding portion, while the stamp material surface corresponding to the imprint original image does not melt and becomes a stamp ink exuding portion.

Example D. In the first manufacturing method of the present invention, a case in which a liquid material is permeated into a document in Example B will be described. A hot-melt ink sheet is stacked on the surface of a stamp material made of an elastic resin that has open cells and can be impregnated with the stamp ink. A liquid material is absorbed into an original made of and the post-imprint original image is superimposed so as to be a mirror image, and then a flash containing infrared rays is irradiated from the original side, so that the thermal fusibility corresponding to portions other than the imprint original image is obtained. The heat-meltable ink of the ink sheet penetrates the bubbles of the stamp material and closes and closes the surface bubbles of the stamp material with the heat of the ink, forming a non-bleeding portion of the stamp ink, while the surface of the stamp material corresponding to the imprint original image is melted by heat. The non-melting ink does not melt and becomes a stamp ink exuding part. To explain the formation of the stamped surface of the stamp material, a hot-melt ink sheet is overlapped so that the hot-melt ink surface is in contact with the surface of the stamp material, and a manuscript coated with liquid silicone or the like is imprinted on the imprint manuscript image. Are superimposed so as to be a mirror image, and when a flash containing infrared rays is irradiated from above, portions of the original other than the imprint original image also transmit infrared rays to the hot-melt ink sheet and are included in the ink of the hot-melt ink sheet. Heat generated by the carbon or polymer substance to penetrate into the air bubbles of the stamp material, and the heat of the ink closes and closes the surface air bubbles of the stamp material, so that the stamp ink occluded in the sponge stamp material does not flow and the stamp ink does not exude. Department. On the other hand, the imprint original image portion of the original does not cause the infrared rays to reach the hot-melt ink sheet, so that the ink of the hot-melt ink sheet does not generate or melt the ink, and the surface of the stamp material does not change and is absorbed by the stamp material. It becomes the ink bleeding part of the stamp ink. A stamped surface is formed by the melted or permeated portion and the non-melted portion or the non-penetrated portion on the surface of the sponge stamp material, and a desired imprint is obtained from this portion at the time of stamping.

Example E. In the first manufacturing method of the present invention, a case will be described in which a heating material having a halftone dot shape of a heating material is used as a heating plate, and a document whose density is expressed by a difference in dot density is used. On the surface of the stamp material that can be impregnated with stamp ink having open cells, a dot heating plate formed by arranging at least one kind of substance selected from the group consisting of carbon and polymer substances in a halftone pattern, In addition, the original document, which is shaded due to the difference in dot density, is superimposed so that the imprint original image is a mirror image, and then a flash containing infrared rays is irradiated from the original side to generate heat from the non-dot portions of the original and the halftone dots. Only the surface of the stamp material corresponding to the halftone dot of the plate is melted to form a stamp ink non-leakage portion, while the surface of the stamp material corresponding to the dot portion of the original and the portion other than the halftone dot of the halftone heating plate is melted. Instead, it becomes a stamp ink bleeding portion and forms a stamped surface having gradation. The stamped surface of the stamp material is formed by overlaying a halftone heating plate so that the ink surface is in contact with the surface of the stamp material, and then forming a thick sheet such as a PPC copy sheet which expresses shading by a difference in dot density. In the case of paper, etc., the imprint original image of the original, which is coated with a liquid such as silicon to improve the infrared transmission efficiency, becomes a mirror image,
When a flash containing infrared light is irradiated from above, the infrared light penetrates and reaches the halftone heating plate in portions other than the dots of the document, and the ink or toner applied to the halftone heating plate in a halftone pattern is applied. The carbon or polymer material contained therein generates heat, and the generated heat melts the surface of the stamp material. In the case of using a heating plate coated with hot-melt ink in a halftone dot shape, the surface of the stamp material is blocked by melting of the surface of the stamp material and penetration of the hot-melt ink, and the stamp material is occluded. This is where the stamp ink does not flow. On the other hand, in the dot portion of the original, infrared rays are reflected and absorbed by toner and ink, etc., which form the pattern of the imprint original with dots, and are difficult to reach the heating plate, and carbon contained in the ink or toner applied to the heating plate. The polymer material does not generate heat or generates little heat even when it generates heat, and the surface of the stamp material remains unchanged and becomes a portion where the ink absorbed in the stamp material exudes. A stamp surface is formed by the density of the dots in the fused portion and the non-fused portion on the surface of the stamp material, and an imprint expressing desired shades is obtained from this portion at the time of stamping.

For example, a photograph having a light and shade is copied by a PPC copying machine capable of expressing a monochrome gradation to obtain an original,
By using a halftone heating plate in which toner or ink is arranged in a halftone pattern on a PET film, the emitted infrared light passes through the area other than the dot portion of the original to generate heat in the halftone toner or ink on the heating plate, The open cells on the surface of the stamp material are selectively closed to form a stamped surface (plate making). The dark gradation part of the document (called the solid black part) is a non-melted part because the halftone dots of the heating plate corresponding to the solid black part do not generate heat due to infrared rays in order to block flash. It becomes the bleeding part of the stamp ink.

In the white solid portion of the document, all the flash reaches the heat generating plate, so that all the halftone dots of the heat generating plate generate heat and the other portions do not generate heat. Influencing each other, the open cells on the surface of the stamp material are continuously closed to form a melted portion and become a stamp ink non-leached portion. The halftone of the document is represented by dot size or dot density. The flash is blocked at the dot portion and does not reach the heating plate, but the portion other than the dot portion reaches the heating plate. However, the flash does not reach all the halftone dots of the heat generating plate as in the case of solid white, the transmitted infrared rays are not large, and only a part of the halftone dots generates heat. As a result, the halftone dots of the heat generating plate are less susceptible to the influence of heat, and the generated heat becomes a halftone dot. Thus, a non-melted portion similar to the dot distribution of the original on the surface of the stamp material is formed and becomes a stamp ink exuding portion. Although the number of dots on the surface of the stamp material may be reduced as compared with the original, an intermediate gradation is expressed. The original in the above-mentioned manufacturing method can be obtained by producing a normal image such as a photograph having gradation with a PPC copying machine. Since the heating materials of the halftone heating plate are arranged in halftone dots, the halftone screens can be duplicated and copied,
There is no need to perform screen separation printing. For this reason, there is no trouble in preparing the original.

This will be described with reference to FIG. P that can express gradation
The figures and photographs copied by the PC copier reproduce the shades due to the difference in dot density, but this is used as it is for the original, and using a heating plate (solid heating plate) with a heating material on the entire surface When making a plate, the resolution is 50-150 dpi, which is considerably coarse as compared with a PPC copier. Therefore, when making a plate with a solid heating plate, the intermediate color with high dot density is often black, and the intermediate color with low dot density is often white, making it difficult to produce a stamp that reproduces the imprint with gradation. It is. [See FIG. 9 (B)] In order to improve this, as a method of reducing the dot density and making it easier to reproduce the gradation, a net of 50 to 100 lines in which white dots of the same diameter are regularly arranged on a transparent film. Create a document whose density is reproduced in halftone dot size by duplicating the above picture etc. on a dot screen with a PPC copier, and lay a solid heating plate and stamp material on the document and irradiate it with flash light under pressure Can make a halftone dot stamped surface. [See FIG. 9 (C)] However, this stamp plate making is difficult to obtain a clear and dark imprint because of the presence of white spots in the solid portion, and is most suitable for a pattern to obtain a stamp with good reproducibility. It is time-consuming and inconvenient because it is necessary to select a kind of halftone screen and a halftone screen is required for copying. Further skill is required to achieve the optimum copy density.

On the other hand, according to the manufacturing method of the present invention, since the heat generating material of the heat generating plate is arranged in a halftone dot, unlike the original which is copied by overlapping the halftone screen [FIG. Since the portion has no transmission of infrared rays, it is made as a black solid plate. Even on the stamped surface, there is no blockage of open cells on the surface, and the stamped portion is reproduced as a solid black portion to obtain a dark imprint. In addition, by appropriately setting the number of lines and density of the heating plate, the heat generation of the halftone dots affects each other on the solid white part, and the continuous bubbles are continuously closed on the surface of the sponge stamp material, and the imprint also becomes solid white. However, even if the density of the imprint original is low, even if the density of dots is a certain size and a set of dots, a small non-fused part remains without being affected by the surrounding heat generation,
Even small dots on a document can be reproduced. In addition, it is easier for the user to control the density of the copy original by preparing a uniform number of lines and density of the halftone dots of the heating plate by printing or the like, and therefore, the number of unsatisfactory stamps is greatly reduced. . For this reason, a relatively clear stamp printing plate can be manufactured even when the range of shading of the seal is expanded and the allowable range of the density of the copied document is expanded.

Example F. In the second manufacturing method of the present invention, when the heating material existing portion in the original is a non-existent portion such as a character or a figure [for example, a black and white inverted normal image using a heating material as a writing material on a transparent sheet or the like (when the cloth of the sheet or the like is used). (Hereinafter, referred to as a heat generating original sheet)].
The heating material sheet on which the desired imprint is drawn is placed in contact with the surface of a stamp material made of an elastic resin that has open cells and can be impregnated with stamp ink, and the heating material sheet is irradiated with light containing infrared rays. By doing so, a fused portion and a non-fused portion are formed on the surface of the stamp material, and the fused portion serves as a stamp ink non-leaching portion, and the non-fusing portion serves as a stamp surface which serves as a stamp ink leaching portion. The stamping surface of the stamping material in this manufacturing method is formed by contacting a heating manuscript sheet with a black-and-white reversal image of a desired imprint on the surface of the stamping material having open cells and impregnated with the stamp ink. Overlap and irradiate a flash containing infrared rays from above. In a portion other than the imprint image of the heat generating original sheet (that is, a portion of the recording material where heat is generated by light), infrared rays are directly absorbed and the surface of the stamp material is melted by the heat generated by the recording material of the heat generating original sheet. This melted portion is a portion where the air bubbles on the surface of the stamp material are closed and the stamp ink occluded in the stamp material does not flow. On the other hand, in the portion of the original sheet which is the imprint mirror image (that is, the portion having no recording material), only the infrared rays are directly transmitted, and the stamp material does not melt. This non-melted portion is a portion where the ink absorbed in the stamp material oozes out. A stamped surface is formed by the fused portion and the non-fused portion, and a desired imprint is obtained from this portion at the time of stamping.

The heating original sheet in this example can be easily obtained by printing a black-and-white inverted normal image on a transparent sheet using a laser printer.

Example G. In the second method of manufacturing a stamp printing plate according to the present invention, a case where the heat-generating material is present is a character, a graphic, or the like. A document is superimposed on a stamp material having open cells and which can be impregnated with stamp ink, and the document is irradiated with light to raise the temperature of a portion of the document where characters, graphics, etc. exist (existing portions of a heating material). The surface of the stamp material corresponding to this temperature rise is melted by the heat to form a melted portion that closes bubbles, thereby providing a stamp non-exuding portion, and a character or graphic non-existent portion (a heat-generating material non-existent portion) in the document. The stamp material has a non-melted portion that transmits light and does not raise the temperature, and the corresponding surface of the stamp material maintains a state where open cells are kept open to the surface, thereby forming a stamp ink exuding portion. In this example, the heating element of the production method of Example A is removed, and a positive stamped surface is formed by the production method of Example A, but a negative stamped surface is formed by this production method.

As described above, in the manufacturing methods shown in Examples A to G, the stamp material is compressed by about 5 to 70% at the time of flash irradiation, the bubbles of the stamp material are elastically deformed, and the adjacent structures are brought into close contact with each other. The surface of the stamp material is melted to a certain depth by the heat of the heat and becomes concave, and the step between the melted portion and the non-melted portion, that is, the step between the stamp ink non-leached portion and the stamp ink leached portion is compressed to be 0.01 mm or more. The closed state of the open cells becomes good, the ink can be filled, and a good imprint can be obtained. Providing a step also has the effect of making it easier to remove stains on the stamp surface when filling the ink, and the effect of making it easier for the stamp ink to hardly penetrate into the non-bleeding part and to obtain a clear imprint when stamping.

The stamp of the present invention is obtained by using the printing plates obtained as described above, or mounting these printing plates on a stock and impregnating the printing plates with stamp ink. The stamp printing plate obtained by the manufacturing method of the present invention has an advantage that the surface of the printing plate itself is made into a printing surface and functions as a stamp without being assembled with other members, but by mounting the printing plate on a stock. It can be a regular stamp. By using the sponge stamp material impregnated or occluded with the ink in advance, it is possible to repeatedly print clear imprints without refilling the ink for a long time. The ink that absorbs the stamp is non-volatile at normal temperature and has a viscosity of 100 to 5000 mP.
Those of a · s show preferable printing performance. However, it goes without saying that the ink is not limited to these. Further, by providing a stamp ink occluding body having a degree of foaming greater than that of the sponge stamp material of the printing plate between the printing plate and the stock, it is possible to extend the service life of the printing and to easily supply the stamp ink. Further, the stamp printing plate of the present invention can be continuously printed by rotating the roll while being mounted on the roll surface.

[0035]

Embodiments of the present invention will be described below.

Embodiment 1 A description will be given based on FIGS. 1 and 2. As shown in FIG. 1A, a stamp material S made of foamed polyethylene, a heating plate T made of a carbon film, and a document M are provided. First,
As shown in (b), the heating plate T is superimposed on the stamp material S, and the document M is further superimposed on the heating plate T to form a stacking state. In addition, the surface of the document M on which characters, figures, and the like are marked is brought into contact with the heating plate T. Next, as shown in (c), light is irradiated from above the original M. A xenon lamp or the like can be used as a light source. The light irradiation is desirably a flash. At this time, as shown in FIG. 2, the light is shielded by the character / graphics present portion L of the original M, or even if the heat is generated, it is not enough to melt the stamp material through the heat generating plate, but the character / graphic absence portion B Then, the light passes through to the heating plate T. The temperature of the portion of the heat generating plate T that is exposed to light rises, and the temperature of other portions does not change. Stamp material S
In FIG. 1, the surface of the portion of the heat generating plate T which comes into contact with the temperature-raising portion is melted by the heat, closes the air bubbles, and contracts to be slightly dented. This portion is a non-ink bleeding portion shown in FIG. H. In the stamp material S, the surface of the portion of the heat generating plate T which comes into contact with the non-temperature rising portion maintains the open state of the open cells, and this portion becomes the ink exuding portion I shown in FIG. As a result, the plate making is completed, and if the original M and the heating plate T are removed and the stamp material S is impregnated with the ink, the stamp material can be stamped.

Second Embodiment As in the first embodiment, when the heating plate T is interposed between the original M and the stamp material S, a positive stamped surface is formed on the original M. When a heating material is used as a recording material, a negative stamped surface is formed by removing the heating plate T. In this case, the light transmitted through the non-existent portion B such as characters and figures on the original M directly hits the stamp material S, and that portion does not change at all. The temperature rises by absorbing the light, and the surface of the stamp material S at that portion is melted, so that a negative stamped surface is formed.

Example 3 Manuscript preparation: A printed matter was copied by a PPC copier to prepare a manuscript M having an imprint manuscript image L. Manufacture of the printing plate: The imprint original image L of the original M is superimposed on the transparent glass plate 2 of the light emitter 1 of the flash containing infrared rays so as to be a normal image.
Further, the hot-melt ink 5 sheet 4 is stacked with the hot-melt ink 5 facing upward, and a stamp material S7 of a foamed polyethylene sheet having an average cell diameter of 3 μm and a porosity of 60% having fine open cells having a three-dimensional network structure is placed thereon. [Figure 3 (a)
reference〕. 50% elastic deformation in the thickness direction of this stamp material
Flash light was applied while applying pressure to give a degree.
As shown in FIG. 3B, the imprint original image L of the original M shields the light, suppresses a temperature rise in a portion corresponding to the imprint original image portion of the hot-melt ink sheet 4, and reduces the temperature of the foamed polyethylene sheet S7. The ink melting of the corresponding portion does not occur, the stamp ink exudation portion I is formed and remains as a mirror image, and the other surface of the hot melt ink 5 penetrates into the bubbles of the stamp material, and the surface heat bubbles of the stamp material remove the surface bubbles of the stamp material. The stamp ink non-exuding portion H where the melted portion 12 and the heat-meltable ink penetrating portion 11 coexist is formed. A stamp plate having a step difference of 0.03 mm between the stamp ink non-exuding portion H and the stamp ink exuding portion I on the stamp surface was obtained (see FIG. 7A). This printing plate was mounted on a stock, and stamp ink was absorbed into the printing plate for continuous stamping. Imprint was very clear.

Example 4 Preparation of a heat-generating original sheet: A black-and-white inverted normal image was printed on a sheet capable of transmitting infrared light with a laser printer using a heat-generating material made of toner that generates heat by infrared as a writing material, and recorded on the printing surface of the sheet. A heat generating original sheet MT having an imprint original 8 in which a normal image of a required character was formed in a portion where no material was present was obtained. Manufacture of printing plate: superimposed on transparent glass 2 of flash light emitter 1 containing infrared rays so that heat generating material 5 'surface of heat generating original sheet MT faces upward, and apparent density of 0.3 g of a three-dimensional network structure is placed thereon.
A stamp material S7 of a foamed polyethylene sheet having fine continuous pores of / cm ³ is placed on top of another (see FIG. 4A). The stamp material was irradiated with flash light in a state where pressure was applied so as to give elastic deformation in the thickness direction of about 5 to 50%. FIG.
As shown in (b), on the surface of the stamp material S7, the portion of the imprinted original image 8 of the heat generating original sheet MT transmits light and remains unchanged as a stamp ink bleeding portion I and remains as a mirror image, and the other surfaces are recording materials. Generates heat and melts and adheres bubbles on the surface layer of the stamp material to form a non-leached portion H of stamp ink. The level difference between the stamp ink exuding portion I and the non-exuding portion H on the stamp surface is 0.
A stamp plate for stamping of 05 mm was obtained (see FIG. 7A). As compared with the case of the first embodiment, the step can be increased by the amount of no original.

Example 5 Manuscript Production: Original M3 having imprint original image L copied on a PPC paper having a metric basis weight of 64 kg / m ^{2 by} a PPC copying machine
It was created. Production of the printing plate: The imprint original image L of the original M3 is superimposed on the transparent glass plate 2 of the xenon flashlight device 1 having an emission energy of 50 joules so as to be a normal image, and liquid silicon [Shin-Etsu Chemical Co., Ltd.] "KF96"] was applied. Further, the hot-melt ink sheet 4 (melting point of the hot-melt ink: 70 ° C.) is stacked with the hot-melt ink 5 face upward, and on this, fine open cells having an average cell of 3 μm of a three-dimensional network structure and a porosity of 60% are provided. Foamed polyethylene sheet (30mm square 4mm thickness)
The stamp material S7 is placed on top of the stack (see FIG. 5). The stamp material was irradiated with flash light in a state where pressure was applied so as to give about 50% of elastic deformation in the thickness direction. As shown in FIG.
A thin liquid silicon layer was formed between the original M3 and the hot-melt ink sheet 4, and the liquid silicon permeated (f) into the original M3. A portion of the surface of the stamp material S7 corresponding to the imprint original image L of the document M3 becomes an ink exuding portion I and remains as a mirror image, and the other surfaces of the stamp material S7 penetrate into bubbles of the stamp material as the hot-melt ink melts. At the same time, the surface air bubbles of the stamp material are tightly closed by the heat of the ink to form a stamp ink non-exuding portion H in which the melting portion 12 and the hot-melt ink penetrating portion 11 coexist. In order to obtain a step between the stamp ink exuded portion I and the non-exuded portion H, 50 joules of energy was required. In contrast, Example 3
Required 100 joules of energy to obtain a step.

Example 6 The procedure of Example 5 was repeated except that the heat-fusible ink sheet 4 was replaced with a heating plate T. As shown in FIG.
On the surface of 7, the portion corresponding to the imprint original image L of the original M3 remains as the stamp ink exuding portion I (mirror image), and on the other surface, the stamp ink non-exuding portion H is formed.

When a liquid material is applied to an original as in Examples 5 and 6, the metric basis weight of generally distributed PPC paper is 52 kg to 64 kg / m ² in the case of monochrome, but in the case of the above plate making conditions , Substantially the same level difference of the stamp surface can be obtained. When a liquid material is not used, the flash condition is set to 64 kg / m ² metric basis weight by using a plate making apparatus and an original having a metric basis weight of 52 kg / m ² is used. The portion of the stamp material that is to become a part is also partially melted, and a good stamped surface cannot be obtained. Therefore, it is necessary to perform plate making with attenuating energy by interposing a filter, etc., and it is necessary to prepare filters corresponding to various paper thicknesses, which is inconvenient.However, by using a liquid material, the original sheet Even if there is a difference in thickness, a fixed stamp surface can be obtained.

Example 7 Manuscript preparation: A photograph is copied by a monochrome PPC copier, and a manuscript M3 having imprint manuscript images L '(black) and L "(gray)
It was created. Production of dot heating plate T ': dot printing having a diameter of 0.14 mm on an acetate film 6' having a thickness of 0.05 mm and a toner N made of polystyrene resin, carbon black, or the like at a pitch of 0.2 mm being dot printed with a laser printer. What was done was used. Production of a printing plate: The imprint document images L '(black) and L "(gray) of the document M3 are superimposed on the transparent glass plate 2 of the xenon flashlight device 1 having an emission energy of 50 joules so as to be normal images. A halftone dot heating plate T 'is overlapped with the ink or toner surface N facing upward, and a porosity 50 of a three-dimensional network structure is placed thereon.
% (Apparent density: 0.3 g / cm ³ ), a stamped material S7 of a foamed polyethylene sheet having fine open cells (see FIG. 8A). Flash light was applied to the stamp material S7 while applying pressure so that elastic deformation in the thickness direction was about 5 to 50%. As shown in FIG. 8B, on the surface of the stamp material S7, a stamped surface having a stamp image exuding portion I and a mirror image of a seal imprinting the portion 9 where the stamped ink exuding portion exists in a halftone dot shape is obtained. For example, as shown in FIG. 9, when a photograph (black and gray) is copied by a monochrome PPC copy, the original M3 is in the state of FIG. 9A. When a halftone dot heating plate T 'is superimposed on this and irradiated with flash light, the black portion does not generate heat, so the stamp material S7 becomes a non-melted portion,
An ink bleeding part I is formed and becomes solid black when stamping,
Only the part where the white part of the gray part (the part corresponding to L ″ in FIG. 8) in FIG. 9A and the halftone dot of the halftone dot heating plate match is melted on the stamp material surface (the non-leakage part of the stamp ink). )
Is formed, and becomes white when stamping, and becomes an imprint having a shape as shown in FIG. 3A, and reproduces black like an original and gray with higher density than the original.

Example 8 The procedure of Example 7 was repeated except that the halftone dots were formed with a hot-melt ink when the halftone heating plate was prepared. FIG. 7A is an enlarged view of the stamp ink exuded portion I and the non-exuded portion H of the stamp material. On the other hand, in the case of the seventh embodiment, FIG.

Comparative Example 1 The procedure of Example 1 was repeated, except that a heating plate without halftone dots was used instead of the halftone heating plate. When stamped, almost all of it was black. (FIG. 9 (B))

Comparative Example 2 A halftone sheet was superimposed on a photograph (black and gray), and a PPC copy was performed to obtain an original shown in FIG. 9B. Using this, it carried out similarly to the comparative example 1. When the seal was applied, a seal (C) was obtained, and the density was reduced as a whole, so that a clear seal was not obtained.

Since the stamp surface is made as in Examples 7 and 8, it is not necessary to use a halftone screen to decompose even a photograph or a pattern having shading, and a manuscript is produced by a PPC copier. As a result, the imprint becomes a solid ink bleeding portion as a solid portion. In the case where the halftone screen is duplicated and copied, the density is higher than that where the imprint cannot be reproduced solid because of the presence of white spots. Also, since the original is composed of dotted dots in the halftone area, only the part where the non-dot part of the original and the dot of the halftone heating plate match generates heat, and the surface layer of the stamp material melts. As a result, the continuous bubbles are closed to form a non-ink bleeding portion, and the printing surface of the printing surface is made to have a higher dot density than the original. However, since the entire density is high at the time of printing, sufficient reproducibility can be obtained visually. In the background of solid white, etc., the heating part of the heating plate has a dot array, so the open cells on the surface of the stamping material should be closed on the whole surface, but the gaps between the dots do not melt and become ink bleeding parts. By appropriately setting the dot diameter and the pitch of the heat generating plate, the white dots in a wide range affect each other, and the entire surface can be closed.

This means that the printing surface of various patterns can be made by adjusting the dots of the heat generating material of the heat generating plate in a specific pattern without specially processing the original.

[0049]

The stamp material is made of resin having open cells and can absorb ink to some extent, so there is an advantage that it is not troublesome to apply ink for each stamping. Next, the stamp material has its own surface. It has the advantage of being easy to manufacture because it does not need to be assembled with other members because it becomes a stamped surface and functions independently, and furthermore, the stamp material is made only by heat, and it is necessary to apply a photosensitive agent or wash it. There is an advantage that a complicated process can be omitted because there is no. That is, the method of manufacturing the stamp plate of the present invention is simple in process and does not require a mold, so that a high-quality stamp suitable for the purpose can be provided quickly. If a heat generating plate is used, a positive stamped surface can be directly formed from the original if there is a positive copy original. Therefore, as is conventionally done, a negative stencil sheet is formed from the original and the negative It is possible to avoid a complicated process such as forming a positive stamped surface by forming a mold from a stencil sheet. Of course, the same applies to the case of a negative.

In particular, in the present invention, the bubbles in the stamp material can be blocked by irradiating the stamp material with flash light in a compressed state so that the adjacent bubbles on the surface layer of the stamp material can be melted in close contact with each other. Therefore, it is possible to obtain a printing plate of good quality with little effect on the non-melted portion. Further, since the recesses are formed, there is no penetration of the ink, so that a good imprint is obtained. further,
In the present invention, since a liquid material such as liquid silicone is applied to an original to increase the transmission efficiency of infrared rays, it is possible to close open bubbles on the surface of the stamp material with relatively small energy. No special processing is required at the time of manuscript preparation, just copying with a PPC copier, making pictures and patterns with shades of gradation into halftone dots, and printing imprints with gradations continuously without ink supply We can provide stamps that can be stamped. Since no white spots are generated in the solid portion, the density of the solid portion of the seal appears to be high, and a seal having a wide range of shades can be obtained. Therefore, high reproducibility can be obtained even when the allowable range of the density of the copy original is enlarged. Imprint can be obtained.

The stamp printing plate obtained by the manufacturing method of the present invention has the advantage that the surface of the printing plate itself is made into a printing surface and functions as a stamp without being assembled with other members. Conventional stamps have the advantage that they have a printing plate that can absorb ink with a stamp material having open cells, so there is no need to apply ink every time stamping is performed. It is the same as a stamp having bubbles, but is characterized by the fact that the imprint obtained by stamping is clear and of high quality.

[Brief description of the drawings]

FIGS. 1 (a) to 1 (d) are explanatory views showing steps for manufacturing a stamp printing plate.

FIG. 2 is a cross-sectional view in a state where light, which is a main part of the process, is irradiated.

FIG. 3 is a schematic diagram of the production of a stamp printing plate (using a manuscript and a heat-meltable ink sheet).
(B) is a schematic diagram showing the state of melting of the stamp material by the hot-melt ink after irradiation and the permeation of the ink.

FIGS. 4A and 4B are schematic diagrams illustrating the production of a stamp printing plate (using a heat generating original sheet), wherein FIG. 4A is a schematic diagram showing a state before the flash light is irradiated, and FIG. .

FIG. 5 is a schematic diagram of the production of a stamp printing plate when a liquid material is applied to an original and a heat-meltable ink is used as a heating plate.

FIG. 6 is a schematic diagram of the production of a stamp printing plate when a heating substance is used by applying a liquid substance to an original.

FIG. 7A is an enlarged view of a melt-penetrating part (coexistence of a melting part 12 and a penetrating part 11) when a hot-melt ink sheet is used. (B) shows a molten portion (1) when a heating plate is used.
It is an enlarged view of 2).

FIGS. 8 (a) and (b) are schematic diagrams showing the production of a stamp printing plate using a shaded original and a halftone heating plate, respectively.

FIG. 9 is a diagram showing a comparison between a halftone heating plate, a normal heating plate, and a halftone sheet (using a normal heating plate).

[Explanation of symbols]

 S Stamp material H Stamp ink non-exuding part I Stamp ink exuding part T Heating plate T 'Halftone dot heating plate M Original M3 Document penetrating liquid material B Non-existent part of characters / graphics L Part of presence of characters / graphics (imprint original image 1) Flash light emitting portion 2 Glass plate 4 Hot-melt ink sheet 5 Hot-melt ink 5 'Heating material 6 Polyester film 6' Acetate film S7 Stamp material Foamed polyethylene sheet 8 Imprint original image of heat original sheet L 'Imprint original image ( Black) L "imprint original image (gray) 9 Part where stamp ink is present in a halftone dot 11 Heat-meltable ink penetrated part 12 Fused part N Halftone dot application part of carbon or hot-melt ink MT Heating original sheet f Liquid material Penetration part

──────────────────────────────────────────────────続 き Continued on the front page (31) Priority claim number Japanese Patent Application No. 6-145031 (32) Priority date Hei 6 (1994) June 27 (33) Priority claim country Japan (JP) (72) Inventor Haruto Shiraishi 2-5-1-12 Irie, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Inside the Mitsubishi Pencil R & D Center (72) Inventor Hajime Toda 2-12-12, Irie, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Research of Mitsubishi Pencil Co., Ltd. Inside the Development Center (72) Susumu Suzuki, Inventor 2-5-1-12 Irie, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Inside the Mitsubishi Pencil R & D Center (72) Koichi Hirano 2-Chome, Irie, Kanagawa-ku, Yokohama-shi, Kanagawa No. 5-12 Mitsubishi Pencil Co., Ltd. Research and Development Center (72) Inventor Sumi Tamano 2-12 Irie 2-chome, Kanagawa-ku, Yokohama, Kanagawa (56) References JP-A-3-96383 (JP, A) JP-A-50-155323 (JP, A) JP-A-60-193686 (JP, A) Actually open JP-A-53-89815 (JP, A) , U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B41K 1/00-1/02 B41K 1/50

Claims (26)

(57) [Claims] 1. A recording material-free portion and a recording material present via a heating plate including a heating material whose temperature rises by irradiating light to an elastic resin stamp material having open cells and impregnated with stamp ink. Documents expressing characters, graphics, etc. are superimposed on each other, and the document is irradiated with light, and the light transmitted through the recording material absence portion raises the temperature of the heat generating material at a location corresponding to the recording material absence portion. In addition to providing a stamp ink non-leaching portion by melting the surface of the stamp material at a location corresponding to the temperature-raised heating material with the heat and closing the bubbles, the light is shielded at the recording material present portion, Suppressing the temperature rise of the heating material at the location corresponding to the recording material present portion and maintaining the surface of the stamp material at the location corresponding to the heating material with the suppressed temperature rise in a state where open cells are opened. A method for producing a stamp printing plate, wherein the stamp ink bleed portion is provided. 2. A sponge sheet made of at least one kind of an elastic resin stamp material having open cells and capable of impregnating a stamp ink selected from the group consisting of natural rubber, synthetic rubber and synthetic resin. A method for producing a stamp plate according to claim 1. 3. A stamp material made of an elastic resin having open cells and capable of impregnating a stamp ink, has fine open cells having an average cell diameter of 2 to 10 μm in a three-dimensional network structure and a porosity of 30 to 80.
The method of claim 1, wherein the sheet is a sheet of a polyolefin foam having a melting temperature of 50 to 100 ° C. and a thickness of 0.5 to 10 mm. 4. The method according to claim 1, wherein the heat-generating plate containing a heat-generating material that rises in temperature by exposure to light is a sheet or the like made of a heat-generating material containing carbon or a polymer substance. 5. A sheet capable of transmitting an infrared ray through a heat generating material comprising an ink or toner containing at least one selected from the group consisting of carbon and a polymer substance, wherein the heat generating plate including a heat generating material whose temperature rises upon exposure to light. 2. The method according to claim 1, wherein the stamp is a sheet coated on at least one side. 6. A heat-fusible material having a melting point higher than the melting temperature of a stamp material, wherein the heat-generating plate including a heat-generating material which rises in temperature by exposure to light includes at least one selected from the group consisting of carbon and a polymer substance. 2. The method according to claim 1, wherein the heat-generating material is a sheet-like material coated on one side such as a sheet capable of transmitting infrared rays. 7. A heating plate containing a heating material which rises in temperature by being exposed to light is made of a heating material containing at least one member selected from the group consisting of carbon and a high molecular weight material on a sheet or the like which can transmit infrared rays. 2. The document according to claim 1, wherein the original is a sheet-like material arranged in the same manner, and the original in which characters, figures, and the like are represented by the recording material absence portion and the recording material presence portion is a pattern expressing shading by a difference in dot density. Manufacturing method of stamp plate for stamp. 8. A heat-fusible material having a melting point higher than a melting temperature of a stamp material, wherein the heat-generating plate including a heat-generating material which rises in temperature by being irradiated with light includes at least one selected from the group consisting of carbon and a polymer substance. It is a sheet-like material in which a heating material made of a substance is arranged in a halftone dot shape on a sheet that can transmit infrared rays, and a document that shows characters / graphics due to the absence of recording material and the portion where recording material is present may be affected by differences in dot density. 2. The method for producing a stamp printing plate according to claim 1, wherein the stamp printing plate is a design representing shading. 9. The method according to claim 1, wherein a liquid material is applied to a document expressing characters, graphics, and the like by a recording material non-existing portion and a recording material present portion. 10. The method according to claim 9, wherein the liquid substance is at least one selected from the group consisting of water, silicone resin, wax, mineral oil and vegetable oil. 11. The method according to claim 1, wherein the light is a flash light using a xenon flash device, a photo strobe flash or a flash valve as a light source containing at least infrared rays. 12. The method according to claim 1, wherein the irradiation of light is performed in a state where a stamp material made of an elastic resin which has open cells and can be impregnated with stamp ink is compressed. 13. Performing in a compressed state can reduce the step between the stamp ink exuding portion and the stamp ink non-exuding portion by 0.0.
The compression is performed so as to be 1 mm or more.
The method of making the stamp plate described. 14. A stamp obtained by impregnating a printing plate obtained by the method according to claim 1 with a stamp ink. 15. A document using a heating material whose temperature rises by irradiating light with a recording material as a recording material is superimposed on a stamp material made of an elastic resin which has impregnated stamp ink with open cells. By irradiating light to raise the temperature of the exothermic material-existing portion of the original, the stamping material non-exuding portion is formed by melting the surface of the stamp material corresponding to the temperature increasing portion with the heat to form a fusing portion for closing bubbles. In addition, the stamp material surface corresponding to the heating material absent portion where the light does not transmit and the temperature does not rise in the document should form a non-melted portion that maintains the state where air bubbles are opened to the surface to be a stamp ink exuding portion A method for producing a stamp printing plate characterized by the following characteristics. 16. A manuscript using a heat-generating material that rises in temperature when exposed to light as a recording material is formed by using an ink or toner containing carbon or a high-molecular substance as a heat-generating material, and using the heat-generating material to form a portion where characters, graphics, etc. are present. 16. The method of producing a stamp plate according to claim 15, wherein the stamp plate is prepared. 17. A manuscript using a heat-generating material that rises in temperature by irradiating light as a recording material uses an ink or toner containing carbon or a polymer substance as a heat-generating material.
16. The method according to claim 15, wherein non-existent portions such as characters and figures are created by using the heat generating material. 18. An ink or toner comprising carbon or a high molecular substance, comprising a heat-meltable substance having a melting point higher than the melting temperature of the stamp material.
The method of making the stamp plate described. 19. A sponge sheet made of at least one kind of an elastic resin stamp material having open cells and capable of impregnating a stamp ink selected from the group consisting of natural rubber, synthetic rubber and synthetic resin. Claim 1 comprising:
5. The method for producing a stamp plate according to 5 above. 20. An elastic resin stamp material having open cells and impregnable with a stamp ink has fine open cells having an average cell diameter of 2 to 10 μm in a three-dimensional network structure and a porosity of 30 to 8
The method for producing a stamp plate according to claim 15, which is a sheet of a polyolefin foam having a melting temperature of 0% of 50 to 100C and a thickness of 0.5 to 10 mm. 21. The method according to claim 15, wherein a liquid material is applied to an original used as a recording material by using a heating material whose temperature rises upon exposure to light. 22. The method according to claim 21, wherein the liquid substance is at least one selected from the group consisting of water, silicone resin, wax, mineral oil and vegetable oil. 23. The method according to claim 15, wherein the light is a flash using a xenon flash device, a photo strobe flash or a flash valve as a light source containing at least infrared rays. 24. The method according to claim 15, wherein the irradiation of light is performed in a state where a stamp material made of an elastic resin having open cells and impregnated with stamp ink is compressed. 25. Performing in a compressed state is such that a step between a stamp ink exuding portion and a stamp ink non-exuding portion is set to 0.
25. The method for producing a stamp plate according to claim 24, wherein the stamp plate is compressed so as to have a thickness of not less than 01 mm. 26. A stamp obtained by impregnating a printing plate obtained by the production method according to claim 15 with a stamp ink.