KR100511818B1 - Printing sheet for stamp - Google Patents

Abstract

A printing sheet used in a stamp includes a porous layer in which ink can be impregnated and a fibrous layer provided to a side of the porous layer opposite to the pattern. The porous layer carries a pattern on a surface thereof, the pattern including a non-print portion which blocks the permeation of the ink and a print portion which allows the permeation of the ink. The fibrous layer prevents the deformation of the porous layer. The fibrous layer is so constituted that ink can be impregnated therein. <IMAGE>

Description

Printing sheet for stamp

The present invention relates to a printing sheet for use in stamps.

As published in Japanese Patent Laid-Open Nos. 8 (1996) -118771 and 8 (1996) -207409, conventional stamps are of a type using a porous printing sheet in which ink can be impregnated. On the surface of the printing sheet, a pattern is formed that includes a print portion that allows ink to penetrate and a beep pint portion that blocks ink from penetrating.

In the use of a stamp, the user holds the stamp and presses the stamp on a medium such as paper so that the surface of the print sheet is pressed against the medium. In this way, the ink impregnated in the printing sheet penetrates through the print portion of the printing sheet and is transferred onto the medium. Therefore, the image can be repeatedly printed on the medium several times without supplying ink to the printing sheet.

In order to reduce the manufacturing cost of the printing sheet, the conventional printing sheet is made thin. Therefore, when ink is impregnated into the printing sheet, the printing sheet may swell. In this case, the surface of the printing sheet may be deformed and the printed image becomes blurred.

In addition, since the printing sheet is made thin, the amount of ink to be impregnated in the printing sheet is relatively small. Therefore, it is necessary to further dispose the sponge-like member on the stamp.

Thereby, the number of parts of the stamp is increased, and the manufacturing cost thereof is also increased. In order to increase the amount of ink to be impregnated in the printing sheet, it is possible as an alternative to make the printing sheet thicker. However, since the pores of the printing sheet are generally fine, the thicker the printing sheet, the longer the time required for the ink to be sufficiently impregnated in the printing sheet.

Moreover, when manufacturing a printing sheet thin, the elasticity falls comparatively. Thus, when the printing sheet is pressed on the medium, the pressure distribution of the printing sheet may be uneven. In order to solve this problem, it is necessary to further arrange the cushion member on the stamp. Thus, the number of parts increases, and the manufacturing cost thereof also increases.

Therefore, the first object of the present invention is to prevent the deformation of the surface of the printing sheet, and the second object is to increase the amount of ink impregnated into the printing sheet without increasing the number of parts. It is to make pressure distribution of printing sheet uniform.

In one aspect of the present invention, there is provided a printing sheet comprising (1) an ink impregnable porous layer and (2) a fibrous layer made of fibers. The fibrous layer is disposed on one side of the porous layer, and the porous layer supports the pattern on its surface. The pattern includes a non-print portion that blocks penetration of ink and a print portion that allows penetration of ink.

When trying to form an image using such a printing sheet, the printing sheet is attached to the stamp. The user grabs the stamp and exerts the stamp on a medium such as paper, whereby the surface of the porous layer is pressed against the surface of the medium. Ink (at least impregnated in the porous layer) penetrates into the print portion of the porous layer and is delivered onto the medium. This forms an image on the medium.

In order to achieve the first object of the present invention, the fibrous layer is configured to prevent deformation of the porous layer. With this arrangement, even if the printing sheet is swollen, the surface of the printing sheet is not deformed. Thus, blurring of the printed image (on the medium) is prevented.

In order to achieve the second object of the present invention, the fiber layer is configured such that the ink can be impregnated therein. With this arrangement, the amount of ink to be impregnated into the printing sheet can be increased without disposing the sponge-like member or the like. In addition, since the printing sheet no longer needs to be thickened (in order to increase the amount of ink to be impregnated), the time required for the ink to sufficiently penetrate throughout the printing sheet does not become long.

In order to achieve the third object of the present invention, the fibrous layer has a certain elasticity.

With this arrangement, the pressure distribution of the printing strip (when the printing sheet is pressed on the medium) becomes uniform even if the porous layer is relatively thin.

The fibrous layer preferably comprises one of a nonwoven fabric and a fabric of fluff fibers. When the porosity includes a foamed resin, it is preferable that the foamed resin of the porous layer and the fibers of the fiber layer are entangled with each other.

In another aspect of the present invention, there is provided a base sheet (used in the production of a printing sheet) comprising an ink-impregnable porous layer and a fibrous layer made of fibers.

By heating the surface according to the desired phase, a pattern can be formed on the surface of the porous layer.

Next, an embodiment of the present invention will be described with reference to the drawings.

1A and 1B are perspective and cross-sectional views illustrating a basesheet 12 of a printing sheet embodiment. The base sheet 12 includes a porous layer 12a and a fiber layer 12b integrally disposed under the porous layer 12a. The porous layer 12a is made of a porous material through which ink can penetrate. For example, the porous layer 12a is made of a foamed resin such as polyolefin resin, polyvinyl chloride resin or polyurethane resin. The porous layer 12a has a certain flexibility and flexibility, and has a generally uniform thickness of about 0.2 mm to 0.8 mm.

In the porous layer 12a, carbon particles are uniformly dispersed therein. When heating the surface of the basesheet 12, the heated surface melts and an opening close to the surface is sealed. Thus, upon selectively exposing the porous layer 12a to electromagnetic waves such as infrared rays, depending on the desired phase, the heated surface of the porous layer 12a becomes a non-printed portion that blocks the penetration of ink, while the other portion It becomes a printing part which allows penetration of ink. The porous layer 12a contains 0.01 to 15% by weight of carbon particles. In this arrangement, the porous layer 12a is gray and turns black when heated. Thereby, the ink of various colors impregnated in the porous layer 12a can be confirmed. In addition, since the carbon content is 0.01% by weight or more, the porous layer 12a is easily heated (so that openings on its surface are sealed) by a standard flash bulb.

The fibrous layer 12b is made of a nonwoven fabric made by adhering or tangling the fibers mechanically, chemically or thermally. For example, the fiber layer 12b is made of felt made of nylon fibers, polyester fibers or polyolefin fibers. In addition, the fiber layer 12b may be made of fluff fibers produced by causing fluff to the fabric. The porous layer 12a and the fiber layer 12b are fixed to each other, whereby the foamed resin material of the porous layer 12a is entangled with the fibers of the fiber layer 12b. In this way, the porous layer 12a and the fiber layer 12b are integrated to form the base sheet 12.

2A and 2B are a plan view and a cross-sectional view of a stamp manufacturing apparatus 1 used for producing a printing sheet. The stamp manufacturing apparatus 1 comprises a unit 3 which receives the flash bulb 6 and a tray 2 detachably disposed in the unit 3.

3 is a perspective view of the tray 2, and FIG. 4 is a perspective view illustrating the tray 3 and the tray 2, respectively. The tray 2 includes a tray body 2a and a transparent cover 2b disposed to be swingable on the tree body 2a. A rectangular groove 2d is disposed in the center of the tray body 2a, and the base sheet 12 and the other two sheets (the original sheet 11 and the intermediate sheet 13) are placed thereon. The transparent cover 2b is pivoted by a pin 2g disposed on one side of the tray body 2a, whereby the transparent cover 2b can be opened and closed. In order to lock the transparent cover 2b in the closed state, the lock lever 2c is disposed on the side opposite to the pin 2g of the tray body 2a. An engaging portion 2f is disposed at the tip of the transparent cover 2b. When the lock lever 2c is swinged to stand as shown in Fig. 4, the lock lever 2c supports the engaging portion 2f of the transparent cover 2b. When swinging the lock lever 2c and lying down as shown in Fig. 3, the lock lever 2c releases the engaging portion 2f so that the transparent cover 2b can be opened. The transparent cover 2b is made of a transparent acrylic resin or the like. On the bottom of the transparent cover 2b, a transparent crimping portion 2e is disposed, which presses the base sheet 12, the original sheet 11 and the intermediate sheet 13 against the bottom of the groove 2d.

As shown in FIG. 4, the unit 3 includes a box-shaped case 4. The insertion opening 4a is provided in the lower part of the front wall of this case 4. The tray 2 can be inserted into the unit 3 through the insertion opening 4a. Pyramid-like chambers 5 with cut ends are formed on the upper side of the case 4. The inner side of the chamber 5 is covered with a film, such as a highly reflective aluminum foil. As shown in FIG. 2A, the flash bulb 6 is detachably mounted to the mounting portion 5a formed on one wall of the chamber 5. The battery 8 is disposed in the case 4 to supply power to the flash volts 6. The battery 8 is connected to the flash bulb 6 via contact members 7 disposed between them. The switch 9 is disposed near the inner wall of the case 4. When the tray 2 is inserted through the insertion opening 4a and accommodated in the unit body 3, the switch 9 is turned on by the impulse of the tray 2 so that power is supplied from the battery 8 to the flash bulb 6 ), Thereby causing the flash bulb 6 to emit light.

The manufacturing method of a printing sheet is demonstrated. 5A, 5B and 5C are schematic views showing the manufacturing method of the printing sheet.

First, the document sheet 11 having a desired image will be described. As shown in Fig. 5A, the document sheet 11 includes a transparent sheet 11a and a photochromic layer 11b formed on the lower side of the transparent base sheet 11a. The thickness of the transparent sheet 11a is approximately uniform and is made of a synthetic resin such as polyethylene terephthalate (PET), polyvinyl chloride or acrylonitrile-butadiene-styrene (ABS) resin. The melting point of the transparent sheet 11a is higher than the melting point of the base sheet 12. In particular, when the transparent sheet 11a is made of PET, its melting point is approximately 230 占 폚. In contrast, the melting point of the base sheet 12 is 120 ° C. (when the base sheet 12 is made of a plasticized polyurethane resin) or approximately 70 ° C. (the base sheet 12 is made of a plasticized polyolefin crab resin). In one case). Therefore, when the document sheet 11 and the base sheet l2 are directly laminated and heated, the base 12 is melted and the document sheet 11 is not melted.

The thickness of the photochromic layer 11b is approximately uniform. On the photochromic layer 11b, the light shielding part 11c is formed according to a desired phase.

Although the light shielding part 11c is formed in advance before manufacturing the printing sheet 14, the manufacturing process of the light shielding part 11c is demonstrated easily. The photochromic layer 11b is formed by applying (ie, impregnating) an organic photochromic ink (manufactured by Teikoku Ink kabushiki Kaisha) on the surface of the transparent sheet 11a. The photochromic layer 11b is generally colorless and transparent, but turns blue and opaque when exposed to electromagnetic waves, including ultraviolet light. The photochromic layer 11b selectively exposes a negative film on electromagnetic waves including ultraviolet rays. In this way, the exposed portion of the photochromic layer 11b turns blue and opaque.

Therefore, the light shielding portion 11c is formed on the photochromic layer 11b in accordance with the desired phase. In addition, the photochromic layer 11b has a characteristic that the photochromic layer 11b is returned to colorless and transparent when it is blocked from ultraviolet rays for a predetermined time. Thus, the document sheet 11 can be used as a new document sheet, so that a user can form a new image thereon. The document sheet 11 can be reused many times as long as the photochromium ink is not degraded.

The intermediate sheet 13 is disposed between the base sheet 12 and the original sheet 11. The intermediate sheet 13 is transparent and has a thickness of approximately 0.025 mm to 0.2 mm. The intermediate sheet 13 is made of PET, and its melting point is approximately 230 ° C., which is higher than the melting point of the base sheet 12. Therefore, when laminating and heating the intermediate sheet 13 and the base sheet 12, the base sheet 12 is melted by the heating, the intermediate sheet 3 is not melted.

Before manufacturing the printing sheet, the tray 2 is removed from the unit body 3.

Then, the transparent cover 2b of the tray 2 is opened (as shown in Fig. 3), the lock lever 2c is operated to release the engaging portion 2f, and then the base sheet l2 and the intermediate sheet ( 13) and the document sheet 11 are placed in the groove 2d of the tray 2. In this state, as shown in FIG. 5A, the fibrous layer 12b faces the lower layer, and the base sheet 12 is positioned so that the intermediate sheet 13 covers the porous layer l2a of the base sheet 12. The original sheet 11 covers the intermediate sheet 13, whereby the photochromic layer 11b of the original sheet 11 is in contact with the intermediate sheet 13.

After placing the base sheet 12, the intermediate sheet 13 and the original sheet 11 on the tray 2, the transparent cover 2b is closed. The transparent cover 2b is locked by the combination of the lock lever 2c and the engaging portion 2f. In this state, the crimping portion 2e of the transparent cover 2b presses the document sheet 11 against the base sheet 12. Thereafter, the tray 2 is inserted into the unit body 3 through the insertion opening 4a (FIG. 2B). When the tray 2 is inserted into the unit body 3, the switch 9 is turned on, so that power is supplied from the battery 8 to the flash bulb 6.

In this way, the flash bulb irradiates the electromagnetic wave containing the infrared ray R.

As shown in FIG. 5B, when the flash bulb 6 emits light, the infrared R passes through the transparent cover 2b, the pressing portion 2e, and the transparent sheet 11a of the document sheet 11 to form a photochromic layer. Irradiated on (11b). The light shielding portion 11c of the photochromic layer 11b blocks infrared rays (R1 in FIG. 5B), and the other portion of the photochromium layer 11b transmits infrared rays (R2 in FIG. 5B). The infrared rays transmitted through the photochromic layer 11b reach the porous layer 12a, which heats the porous layer 12a to melt and seal the opening. Thus, the nonprint portion 12c is formed on the porous layer 12a to block the penetration of the ink. On the other hand, since the infrared ray R1 blocked by the light shielding portion 11c does not reach the porous layer 12a, the print portion 12d is formed on the porous resin layer l2a to allow the ink to penetrate. As shown in FIG. 5C, the porous layer l2a (including the print portion 12d and the non-print portion l2c) and the fiber layer 12b constitute the printing sheet 14. 6 is a perspective view of the printing sheet 14. The print portion 12d and the non-print portion 12c are formed on the porous layer 12d according to a desired pattern, for example, "E".

Therefore, the printing sheet 14 which consists of the porous layer 12a and the fiber layer 12b which support the pattern (print part 12d and non-print part 12c) is formed by the process mentioned above.

In the above-described process, the light shielding portion 11c of the photochromic layer 11 is heated by irradiation of infrared rays, but this heat passes through the intermediate sheet 13 (which is in contact with the surface of the photochromic layer 11). Is released. Thus, the portion of the porous layer l2a to be the print portion l2c (corresponding to the light shielding portion 11c) is prevented from being unconsciously heated.

7 is a cross-sectional view of the stamp 20 structure using the printing sheet 14. The stamp 20 includes a handle 24 held by the user and a stamp body 21 disposed at the lower end of the handle 24. The stamp body 21 has a recess 22 open to the bottom end of the stamp body 21, whereby the printing sheet 14 is fitted into the recess 22. The stamp body 21 is made of plastic, metal, or the like. The fiber portion 23 is disposed on the upper side of the recess 22 to support the printing sheet 14. 8A is an enlarged schematic view of the fiber portion 23.

As shown in FIG. 8A, the fibrous portion 23 includes a plurality of fibers 23a that are laid down on and extending from the top wall of the recess 22. The fibers 23a are made of synthetic resin or the like. Each fiber 23a has a hook-shaped curved portion 23b at its lower end.

In addition, as shown in FIG. 8B, each fiber 23a may have an arrowhead-shaped tip.

The handle 24 is detachably disposed on the stamp body 21. The stamp body 21 has an ink supply port 25 disposed below the handle 24 and extends downward to the upper wall of the recess 22. When the handle 24 is detached from the stamp body 21, the ink supply port 25 is opened. In this state, the user can supply ink to the ink sheet 14 through the ink supply port 25.

As shown in FIG. 7, the printing sheet 14 has a nonwoven fabric (or fluff fibers) of the fiber layer 12b of the printing sheet 14 having a hook shape (or arrowhead shape) of the fibers 23a of the fiber portion 23. Attached in recess 22 to entangle with the lower end. Thus, the printing sheet 14 can be attached to the stamp body 21 by simply pressing the printing sheet 14 against the fiber portion 23.

When using the stamp 20, the user grasps the handle 24 and presses the stamp on a medium, not shown, such as paper, by which the lower side (printing surface) of the printing sheet 14 is pressed against the medium. In this way, the ink impregnated in the fiber layer 12b penetrates into the medium through the print portion 12c of the printing sheet 12. Because of the elasticity of the fibrous layer 12b, the pressure distribution other than the printing sheet 14 is uniform even if the porous layer l2a swells.

When replacing the printing sheet 14, the printing sheet 14 can be easily removed from the recess 22 by simply peeling the printing sheet 14 from the fiber portion 23.

In this way, the nonwoven fabric (or fluff fiber) of the printing sheet 14 fiber layer 12b is released from the fiber 23a of the fiber part 23. Accordingly, it is possible to mount various printing sheets 14 on the stamp body 21 to form various images on the medium.

The fibrous layer 12b has a property of not swelling even when ink is impregnated therein. Since the porous layer 12a is formed integrally with the fibrous layer 12b, even if the porous layer is swollen, the surface of the porous layer 12a is prevented from being deformed.

The ink amount impregnated in the fiber layer 12b is larger than the ink amount in the porous layer l2a. Therefore, it is not necessary to arrange a separate ink impregnation member (sponge mat or the like) besides the printing sheet 14. In addition, since the space between the fibers of the fiber layer 12b is larger than the space between the openings of the porous layer 12b, ink can be impregnated into the printing sheet 14 within a short time.

In addition, since the fibrous layer 12b is elastic, the printing sheet 14 is also elastic. Because of the elasticity of the printing sheet 14, it is possible to apply a uniform pressure through the printing surface without disposing a separate cushion member. Thus, a clear image is formed on the medium.

Although the structure of the present invention has been described with reference to the preferred embodiments, various modifications and changes are possible without departing from the spirit and scope of the invention.

For example, in the above-described embodiment, the flash bulb 6 may be used as a heat source for melting the porous layer l2a of the base sheet 12. However, the flash bulb 6 can be replaced with a xenon tube or other light source that irradiates infrared rays. In addition, the flash bulb 6 may be replaced by a heat generator such as a thermal head.

In addition, the document sheet 11 passes tracing paper or electromagnetic waves, and ink of a desired color (for example, black, white, gold, and silver) can be replaced with another paper having a blocked image. . In addition, the porous layer l2a of the base sheet 12 may be made of any foaming agent having flexibility when formed of the porous sheet. In addition, the carbon particles dispersed in the porous layer 12a may be replaced with any material (for example, a polymer material such as silver chloride and silver bromide or a light energy absorbing material) that generates heat due to heating when electromagnetic waves are irradiated. Do.

La and 1b are a perspective view and a cross-sectional view showing a base sheet of a printing sheet according to an embodiment of the present invention.

2A and 2B are plan and cross-sectional views showing a stamp manufacturing apparatus for manufacturing a printing sheet.

Figure 3 is a perspective view showing a tray of the stamp manufacturing apparatus of Figures 2a and 2b.

Figure 4 is a perspective view of the stamp manufacturing apparatus of Figures 2a and 2b.

5A, 5B and 5C are cross-sectional views illustrating a manufacturing process of a printing sheet.

6 is a perspective view of a printing sheet.

7 is a cross-sectional view of the stamp.

8A and 8B are enlarged cross-sectional views of a stamp fiber portion.

Claims (22)

An ink impregnated porous layer, It consists of a fiber layer and a strain inhibitor made of fibers excreted on one side of the porous layer, And the porous layer has a pattern on its surface including a non-print portion that blocks penetration of the ink and a print portion that allows penetration of the ink. The printing sheet of claim 1, wherein the fibrous layer prevents deformation of the porous layer. The printing sheet according to claim 1, wherein the fibrous layer is configured to allow ink to be impregnated therein. The printing sheet of claim 1, wherein the fibrous layer has a specific elasticity. The printing sheet according to claim 1, wherein the fibrous layer is made of one of a nonwoven fabric and a fabric made of fluff fibers. The method of claim 1, wherein the porous layer is made of a foamed resin, A printing sheet in which the foamed resin of the porous layer and the fibers of the fiber layer are entangled with each other. The printing sheet of claim 1, wherein the porous layer comprises a heating material that generates heat when exposed to electromagnetic waves. The printing sheet of claim 7, wherein the porous layer includes carbon particles, and the carbon particles generate heat when exposed to infrared rays. A porous layer capable of impregnating ink; Fibrous layer as strain-resistant material made of fibers and Made up of For the stamp on the surface of the porous layer, it is possible to form a pattern comprising a non-printed portion to block the penetration of the ink by heating the surface in accordance with the desired phase and a print portion to allow the penetration of the ink Base sheet used to make printing sheets. The base sheet of claim 9, wherein the fiber layer prevents deformation of the porous layer. The basesheet of claim 9, wherein the fibrous layer is configured to allow ink to be impregnated therein. The basesheet of claim 9, wherein the fibrous layer has a specific elasticity. 10. The basesheet of claim 9, wherein the fibrous layer comprises one of a nonwoven fabric and a woven fabric of fluff fibers. The method of claim 9, wherein the porous layer is made of a foamed resin, A base sheet in which the foamed resin of the porous layer and the fibers of the fiber layer are entangled with each other. The base sheet of claim 9, wherein the porous layer includes a heating material that generates heat when exposed to electromagnetic waves. The base sheet of claim 15, wherein the porous layer includes carbon particles, and the carbon particles generate heat when exposed to infrared rays. A porous layer capable of impregnating ink; A fiber layer as a strain preventing material to prevent deformation of the porous layer; Made up of For the stamp on the surface of the porous layer, it is possible to form a pattern comprising a non-printed portion to block the penetration of the ink by heating the surface in accordance with the desired phase and a print portion to allow the penetration of the ink Base sheet used to make printing sheets. Stamp body; The printing sheet mounted on the stamp body and Made up of The printing sheet is composed of a porous layer capable of impregnating ink and a fibrous layer as a strain preventing material made of fibers; And the porous layer has a pattern on its surface comprising a non-print portion that blocks penetration of the ink and a print portion that allows penetration of the ink. 19. The stamp of claim 18, further comprising a fiber portion disposed in the stamp body, wherein the fiber layer is fixed to the fiber portion. 19. The stamp of claim 18, wherein the fibrous layer has a specific elasticity. 19. The stamp of claim 18, wherein the fibrous layer consists of one of a nonwoven fabric and a fabric of fluff fibers. The method of claim 18, wherein the porous layer is made of a foamed resin, A stamp in which the foamed resin of the porous layer and the fibers of the fiber layer are entangled with each other.