JP2002225408A - Stamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stamp, with which spreading of a stamping ink can be suppressed and an impression can be prevented from bleeding. SOLUTION: A thin plate-like stamp material 8A made of a porous resin having minute interconnecting cells is mounted onto the top surface part of a stamp 8. By hot pressing with a mold 35 heated in advance up to the predetermined temperature, the cells in the surface portion of the stamp face part of the stamp material abutting against the outside edge face part of each projected part 37 formed on the bottom base part of the mold 35 are fused and solidified in the fashion of a lattice, resulting in forming a non-penetrating part 43, which is slightly lower than the height of the surface and can not penetrate a stamping ink and is made of a thin film layer having the thickness of several μm. On the other hand, in the surface portion, which is formed on the bottom base part of the mold and does not in contact with the projected parts 37, of the stamp face part of the stamp material 8A, non-fused parts 44, each of which has an outwards projecting ink penetrating pore portion with a near tetragonal horizontal section, are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamp having a stamp material formed of a porous resin. The present invention relates to a stamp capable of suppressing spread of stamp ink and preventing bleeding of a seal.

[0002]

2. Description of the Related Art Conventionally, a porous resin impregnated with a stamp ink has been used as a stamp material in order to save time and effort for attaching stamp ink or the like to a stamp surface each time stamping or stamping is performed. There have been proposed various stamp making apparatuses that form a mirror image of a printed image by directly applying a stamp ink to a surface portion by an ink jet printer head. For example, in a simple stamp described in Japanese Patent Application Laid-Open No. 9-118063, after printing on a porous sheet using an inkjet printer, the porous sheet is cut into a required size, and the stamp is attached to a holder to form a stamp. A simple stamp to be created is described. Thus, by printing on a porous sheet with a color jet ink printer, a stamp capable of continuous printing and capable of color printing can be easily created.

[0003]

However, in the simple stamp described in Japanese Patent Application Laid-Open No. 9-118063, when multi-color printing is performed by a color jet ink printer, the applied ink dots are spread to some extent and become porous. Since the ink is absorbed by the stamped surface of the quality sheet, there is a problem that the peripheral portion of the already applied ink dot of another color and the peripheral portion of the ink dot of the predetermined color overlap and the color blurs.

Accordingly, the present invention has been made to solve the above-mentioned problems, and a non-transmissive portion of a stamp formed of a porous resin has a non-permeable portion which is not penetrated by a stamp ink which is partitioned into a predetermined pattern shape. An object of the present invention is to provide a stamp capable of suppressing the spread of the stamp ink and preventing the bleeding of the seal by being provided on the stamp face portion.

[0005]

According to a first aspect of the present invention, there is provided a stamp comprising a stamp material formed of a porous resin having continuous cells which can be impregnated with stamp ink. A non-transmitting portion that does not penetrate the stamp ink that defines the stamp surface portion so as to form a transmitting portion through which the stamp ink having a predetermined pattern penetrates, so that the non-transmitting portion is larger than the pore diameter of the open cell. Is also formed with a large predetermined width dimension.

According to the stamp having the above features, the stamp material is formed of a porous resin having open cells that can be impregnated with the stamp ink. The printing surface of the printing material is defined by a non-transmitting portion, which is larger than the pore diameter of the open cell and has a predetermined width and is impermeable to stamp ink, to form a transmitting portion through which stamp ink having a predetermined pattern shape penetrates. Thus, since the stamp ink applied to each transmitting portion of the stamp surface is partitioned by the non-transmitting portion, the spread of the stamp ink is suppressed, and the bleeding of the seal can be prevented. In particular, when the color stamp ink is applied to each transmissive portion of the stamp surface, the stamp ink of each color is partitioned by the non-transmissive portion, so that it is possible to effectively prevent color bleeding and turbidity.

According to a second aspect of the present invention, in the stamp according to the first aspect, the non-transmissive portion is formed by heating and melting.

[0008] In the stamp according to the second aspect having such characteristics, in the stamp according to the first aspect, since the non-permeable portion is formed by heating and melting, the surface portion of the porous resin is formed. In addition, a thin film through which the stamp ink does not penetrate due to the solidification of the porous resin can be easily formed.

The stamp according to claim 3 is the stamp according to claim 2, wherein the heating is performed by a hot press.

[0010] In the stamp according to the third aspect having such a feature, in the stamp according to the second aspect, the heating is performed by a hot press. Can be formed,
It is possible to improve the working efficiency and reduce the manufacturing cost. In addition, a non-transmissive portion is formed on the stamp surface of a wide stamp material by a single press, and by cutting this wide stamp material into a predetermined shape, a stamp material of a desired shape can be mass-produced, further increasing the manufacturing cost of the stamp. Reduction can be achieved.

In the stamp according to the fourth aspect, in the stamp according to the second aspect, the heating is performed by selectively driving the heating elements of a thermal head provided with a plurality of heating elements. It is characterized by the following.

[0012] In the stamp according to the fourth aspect having such characteristics, in the stamp according to the second aspect, the heating is performed by selectively driving the heating elements of a thermal head provided with a plurality of heating elements. It is done by doing. Thus, since the non-transmissive portion is formed by the selective heating driving of each heating element of the thermal head, the predetermined pattern shape of the transmissive portion through which the stamp ink penetrates can be miniaturized. In particular, when stamp ink is applied to the printing surface by an ink jet printer head or the like, a transparent portion having a pattern shape smaller than the diameter of the applied ink dot can be easily formed, and the bleeding of the stamp ink is ensured. Can be prevented.

According to a fifth aspect of the present invention, in the stamp according to the first aspect, the non-transmissive portion is formed by applying a sealant.

According to a fifth aspect of the present invention, there is provided the stamp according to the first aspect, wherein the non-transmissive portion is formed by placing a mask having a predetermined pattern on a surface of a porous resin. Is formed by applying the ink, so that a thin film through which the stamp ink does not penetrate can be easily formed. In addition, a mask is placed on the printing surface of a wide printing material to form a non-transmissive portion by a single application of a sealant, and the wide printing material is cut into a predetermined shape, whereby a printing material having a desired shape can be mass-produced. The manufacturing cost can be reduced.

The stamp according to claim 6 is the stamp according to any one of claims 1 to 5,
The predetermined pattern shape is substantially quadrangular.

In the stamp according to the sixth aspect having such characteristics, in the stamp according to any one of the first to fifth aspects, since the predetermined pattern shape is substantially rectangular, the shape of the hot press mold Can be easily manufactured, and a mask for applying a sealant can be easily manufactured, so that the manufacturing cost of the stamp can be further reduced.

The stamp according to claim 7 is the stamp according to any one of claims 1 to 5,
The predetermined pattern shape is substantially hexagonal.

[0018] In the stamp according to claim 7 having such characteristics, in the stamp according to any one of claims 1 to 5, since the predetermined pattern shape is substantially hexagonal, the shape of the hot press mold is reduced. The shape can be easily manufactured, and a mask for applying the sealant can be easily manufactured, so that the manufacturing cost of the stamp can be further reduced.

Further, the stamp according to claim 8 is the stamp according to any one of claims 1 to 7,
The size of the predetermined pattern shape is smaller than the size of the minimum dot of the stamp ink applied to the stamp surface.

According to the stamp according to claim 8 having such characteristics, in the stamp according to any one of claims 1 to 7, the size of the predetermined pattern shape is:
It is formed smaller than the minimum dot size of the stamp ink applied to the stamp surface. Thus, when the stamp ink is applied to the printing surface by an ink-jet printer head or the like, each dot of the stamp ink is applied over a plurality of transmitting portions, and the positioning of the transmitting portion of the stamp and the ink ejection port is performed. Even if the stamping is not performed, the stamp ink applied to the stamp surface is partitioned by each non-transmitting portion, so that the spread of the stamp ink is suppressed,
Bleeding of the seal can be reliably prevented. In particular, when the color stamp ink is applied to each transmitting portion of the stamp surface, the stamp ink of each color is surely partitioned by the non-transmitting portion, so that it is possible to more effectively prevent color bleeding and turbidity. it can.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; First, a schematic configuration of the stamp creation device according to the first embodiment will be described with reference to FIGS. Figure 1
1 is a perspective view of a stamp forming apparatus for forming a stamp on a stamp surface of a stamp material according to a first embodiment. FIG. 2 shows the first
FIG. 2 is a block diagram illustrating a system configuration of a control unit of the stamp forming apparatus that forms a stamp on a stamp surface of a stamp material according to the embodiment. As shown in FIG. 1, the stamp making device 1 according to the first embodiment includes a main body frame 2, a keyboard 3 and a liquid crystal display 4 provided at a front part of the main body frame, and a substantially central part of an upper rear part of the main body frame 2. The ink jet printer head 5 for ejecting the provided color stamp ink, the cover 6 of the ink jet printer head 5, and the width (horizontal direction in FIG. 1) of the carriage 9 provided on the left rear portion of the main body frame 2 An opening 10 having substantially the same width, a pair of guide rods 11 extending in the left-right direction which are attached to the rear part of the main body frame 2 facing each other, and supported by the pair of guide rods 11 so as to be movable in the left-right direction. And the rotation of a carriage feed motor 34 (see FIG. 2) such as a stepping motor fixed to the rear end face of the carriage 9. Carriage 9
A stamp 8 attached detachably to the carriage 9 and provided with a later-described marking material 8A (see FIGS. 3 and 4) formed of a porous resin on the upper surface, and a main body. It comprises a control unit 20 and the like provided in the frame 2.

The keyboard 3 is provided with character / symbol keys including a kana key, a plurality of character keys and a plurality of symbol keys that also serve as alphabet keys, various text editing keys, a print start key 13, and the like. . In addition, the liquid crystal display 4 is configured to be able to display a plurality of lines of character strings, frames, and the like corresponding to the pattern to be imprinted created by the stamp creating device 1. In addition, the lower surface of the ink jet printer head 5 is arranged in a vertical direction (FIG. 1).
A plurality of nozzles (shown in FIG. 1) at predetermined intervals at positions substantially the same as the width of the stamp material 8A (front and rear directions in FIG. 1) facing the stamp material 8A of the stamp 8 in the middle and front and rear directions. Is not provided) is provided for each color of the color stamp ink,
Under the control of the control unit 20, the color stamp ink is ejected from each nozzle to the printing surface of the printing material 8A.
The carriage feed motor 34 is minutely controlled by the control unit 20, and the carriage 9 is minutely moved left and right via the steel wire 12.

Next, the configuration of the control unit 20 for controlling the stamp making device 1 will be described. As shown in FIG. 2, the control unit 20 includes a CPU 2 for controlling each device.
1, ROM 22, RAM 23, CG-ROM 2 for printing
4. CG for display for display on the liquid crystal display 4
A ROM 35, an input interface 27 connected to a position detection sensor 26 (not shown in FIG. 1) for detecting the positions of the keyboard 3 and the carriage 9 in the left-right direction, and an output interface 28 are provided. Are connected to each other. Further, the control unit 20 includes a head drive circuit 31 for driving the ejection of the color stamp ink of the ink jet printer head 5 connected to the output interface, and a motor drive circuit 3 for performing a minute rotation drive of the carriage feed motor 34.
2, and a display drive circuit 33 for displaying a character or the like input by the keyboard 3 on the liquid crystal display 4.

The ROM 22 is provided with a program memory 22A for storing a control program for controlling the entire operation of the stamp making apparatus 1, and a dictionary memory 22B for kana / kanji conversion and the like.

The RAM 23 is provided with an input buffer 23A for storing input data, a print buffer 23B for storing print data, an image buffer 23C, and various other counters and registers.

The printing CG-ROM 24 stores a large number of characters and dot pattern data to be printed in association with the code data.
25 stores display dot pattern data of a large number of characters to be printed in association with code data.

Next, the schematic structure of the stamp 8A will be described with reference to FIGS. FIG. 3 is a perspective view of the stamp 8A provided on the upper surface of the stamp 8 according to the first embodiment. FIG. 4 is a view schematically showing an example in which a non-transmitting portion through which stamp ink does not pass is formed by hot pressing on the stamp face of the stamp 8 according to the first embodiment, and FIG. Side sectional view showing a state before forming a part, (B)
7A is a side cross-sectional view showing a state where the non-transmissive portion of the stamp surface of the stamp material 8A is melted, and FIG. 7C is a side sectional view showing a state after the non-transmissive portion is formed on the stamp surface of the stamp material 8A. As shown in FIG. 3, the stamp material 8A is made up of fine open cells (in the first embodiment,
The pore size is about 10 μm to 30 μm. ), And is formed in a thin plate shape of a porous resin such as polyurethane or polyethylene. Therefore, since the printing material 8A has open cells, it has a property of transmitting ink.

Next, an example in which a non-transmissive portion through which the stamp ink does not pass is formed by hot pressing on the stamp surface of the stamp material 8A will be described with reference to FIG. As shown in FIG. 4A, the mold 35 is heated to a predetermined temperature by a heater 36 in advance. The bottom surface of this mold 35 is almost the same as the shape of the stamped surface portion of the stamping material 8A, and is pressed (see FIG. 4B).
Is configured to cover the entire surface of the stamp face of the stamp material 8A. On the bottom surface of the mold 35, a lattice-shaped convex portion 37 having a shape of a non-transmitting portion through which the stamp ink formed on the stamping surface of the stamping material 8A does not pass is formed so as to protrude outward. Further, the width of the projection 37 is formed to be larger than the pore diameter of the open cell of the stamp 8A (in the first embodiment, the width of the projection 37 is about 50 μm). A non-transmitting portion through which the stamp ink does not pass is not yet formed on the stamped surface portion. And stamping material 8
The stamp 8 provided with A on the upper surface is set directly below the mold 35 so as to face the bottom surface of the mold 35,
Is lowered in the direction of arrow 40, and as shown in FIG.
The printing material 8A is pressed against the printing surface of the printing material 8A for a predetermined time. Thereby, the stamped surface portion of the stamping material 8A that contacts the outer end surface of the convex portion 37 formed on the bottom surface of the mold 35 is melted.

Thereafter, as shown in FIG.
Rises upward (direction of arrow 41), and the melted portion of the stamp face of the stamp material 8A is solidified. As a result, pores in the surface portion of the stamping surface of the stamping material 8A are melted and solidified in a grid pattern, and the non-transmissive portion 43 (FIG. 4C) made of a thin film layer of several μm that does not allow the passage of stamp ink slightly lower than the surface height. Spots)
Is formed. On the other hand, a non-melting portion 44 having a substantially rectangular horizontal cross section protruding outward and having a pore portion through which ink penetrates is provided on the surface portion of the stamping portion of the stamping material 8A which does not contact the convex portion 37 formed on the bottom portion of the mold 35. Is formed.

Next, the ink jet printer head 5 is attached to the stamped surface of the stamp 8A of the stamp 8 thus formed.
An example in which a color stamp ink is applied will be described with reference to FIG. FIG. 5 is a partially enlarged plan view showing an example in which a color stamp ink is applied to the printing surface of the printing material 8A of the stamp 8 according to the first embodiment by the ink jet printer head 5. As shown in FIG.
The non-transmissive portion 43 through which the stamp ink does not penetrate
(Thick linear portions in FIG. 5) are formed in a lattice shape. The non-melted portions 44A, 44B, 44C, and 44D are coated with ink droplets of a yellow (Y) color stamp ink with substantially circular dots 51 having a radius of the distance between the lattices. (In FIG. 5, hatched circles). Further, each of the non-fused portions 44E, 44F, 44G, 4
4H, ink droplets of the color stamp ink of magenta (M) are applied by substantially circular dots 52 having a radius of a distance between the lattices (a small circle having a lattice pattern in FIG. 5). mark). In addition, each of the non-fused portions 44I, 44
J, 44K, and 44L are coated with ink droplets of the color stamp ink of cyan (C) with substantially circular dots 53 whose radius is the distance between the grids (small dots in FIG. 5). Spotted circle). In addition, yellow (Y) is applied to each of the non-melted portions 44M, 44N, 44O, and 44P.
The ink droplets of the color stamp ink are applied by substantially circular dots 54 whose radius is the distance between the lattices (circled circles in FIG. 5). Further, in each of the non-fused portions 44Q, 44R, 44S, and 44T, an ink droplet of a magenta (M) color stamp ink is provided with a substantially circular dot 5 whose radius is the distance between the lattice and the lattice.
5 (small checkered circle in FIG. 5). Thereby, each dot 51, 52, 53, 54,
55 is blocked by the non-transmissive portion 43 formed on the surface portion.

As described in detail above, the stamp 8 according to the first embodiment has a thin plate-shaped stamping material 8A formed of a porous resin having fine open cells attached to the upper surface. In addition, a non-transmissive portion 43 in which the stamp ink does not penetrate is formed in a lattice shape on the stamp face of the stamp material 8A of the stamp 8 by hot pressing with a mold 35 preheated to a predetermined temperature. The stamp 8 in which the grid-shaped non-transmissive portion 43 is formed on the stamp face portion is the stamp forming device 1.
And a substantially circular color stamp ink (yellow (Y), magenta (M)) whose radius is the distance between the grids of the non-transmissive portions 43 via the inkjet printer head 5. , Cyan (C)).

Therefore, the color stamp ink applied to the stamp face of the stamp 8A of the stamp 8 is
Since the stamp inks of the respective colors are partitioned by this, it is possible to effectively prevent bleeding or turbidity of the colors. In addition, since the non-transmissive portion 43 is formed by heating and melting, a thin film that does not penetrate the stamp ink by melting and solidifying the porous resin is easily applied to the surface of the stamping material 8A formed of the porous resin. Can be formed.
Further, since the non-transmissive portion 43 is formed by hot pressing, the non-transmissive portion 4 is formed on the stamp face of the stamp material 8A by a single press.
3 can be formed, so that work efficiency can be improved and manufacturing cost can be reduced. In addition, since the shape of the convex portion 35 formed on the bottom portion of the mold 35 is a lattice shape,
The hot press mold 35 can be easily manufactured, and the manufacturing cost of the stamp 8 can be further reduced. Further, when the color stamp ink is applied to the stamp surface of the stamp 8 by the ink jet printer head 5 or the like, each dot of the color stamp ink is applied over a plurality of non-fused portions 44, and the color stamp ink is applied. The color stamp ink applied to the stamp surface is partitioned by the non-transmissive portion 43 without positioning the non-fused portions 44 that penetrate and the ink discharge ports, so that the spread of the color stamp ink is suppressed, and the color Bleeding and turbidity can be effectively prevented.

Next, a stamp according to a second embodiment will be described. The stamp according to the second embodiment has substantially the same configuration as the stamp 8 according to the first embodiment. However, the difference is that the non-transmissive portion formed on the stamp surface of the stamp material 8A attached to the upper surface of the stamp 8 is formed by a thermal head. Here, an example of forming a non-transmissive portion through which the stamp ink does not pass by the thermal head on the stamp surface of the stamp material 8A of the stamp 8 according to the second embodiment will be described with reference to FIGS. FIG. 6 is a diagram schematically illustrating an example of operation control of the thermal head when a non-transmitting portion through which the stamp ink does not pass is formed on the stamp surface of the stamp material 8A of the stamp 8 according to the second embodiment. It is the elements on larger scale which show the non-transmissive part preparation state of a stamp surface part. FIG.
FIG. 7 is a diagram schematically showing an example of operation control of the thermal head when the thermal head of FIG. 6 is moved in the advancing direction by a dimension substantially equal to the length dimension of each heating element in the sub-scanning direction. It is the elements on larger scale which show the non-transmissive part preparation state of a surface part. FIG. 8 is a diagram schematically showing an example of the operation control of the thermal head when the thermal head of FIG. 7 is moved in the advancing direction by a dimension substantially equal to the length dimension of each heating element in the sub-scanning direction. FIG. 4 is a partially enlarged view showing a non-transmissive portion creation state of the stamp face portion of FIG. FIG. 9 is a diagram schematically showing an example of the operation control of the thermal head when the thermal head of FIG. 8 is moved in the advancing direction by a dimension substantially equal to the length of each heating element in the sub-scanning direction. FIG. 4 is a partially enlarged view showing a non-transmissive portion creation state of the stamp face portion of FIG. FIG. 10 is a diagram schematically showing an example of operation control of the thermal head when the thermal head of FIG. 9 is moved in the advancing direction by a dimension substantially equal to the length dimension of each heating element in the sub-scanning direction. FIG. 4 is a partially enlarged view showing a non-transmissive portion creation state of the stamp face portion of FIG. 6 to 10, the same reference numerals as those of the stamp 8 and the like according to the first embodiment denote the same or corresponding parts as those of the stamp 8 and the like.

First, the schematic structure of the thermal head according to the second embodiment will be described with reference to FIG. As shown in FIG. 6, the head holder 61 provided with the thermal head 62 on the lower surface of the distal end portion is attached to a head carriage (not shown) so as to face the stamp face of the stamp 8A of the stamp 8. Further, the head holder 61 is configured to press the stamp face of the stamp material 8A by the urging force of a pressing spring (not shown) composed of a torsion spring or the like. still,
The head carriage is configured to be movable in the sub-scanning direction of the stamp 8 (the length direction of the printing material 8A) by a head carriage feed motor (not shown). The width of the thermal head 62 is formed slightly longer than the width of the printing material 8A. The drive of the head carriage feed motor, the thermal head 62, and the like are controlled by instructions from an external personal computer or the like.

As shown at the left end of FIG. 6, the n-th, n + 1-th, and n + 2
The n, n + 3, n + 4, and n + 5 heating elements n, n + 1, n + 2, n + 3, n + 4, and n + 5 are arranged in a substantially square shape in a straight line in the vertical direction (the main scanning direction, that is, the width direction of the printing material 8A). It is shown arranged. Each heating element n, n + 1, n + 2, n + 3, n + 4, n + 5
Are formed to have dimensions substantially equal to the length of about 1/4 of the diameter of the ink dot applied to the printing material 8A, and the length of each heating element in the sub-scanning direction is It is formed to have a dimension substantially equal to the length of about 1/4 of the ink dot diameter.

Next, the printing material 8A by the thermal head 62
The creation of the non-transmissive portion of the stamp surface will be described with reference to FIGS. As shown in FIG.
While heating the respective heating elements n + 1 and n + 4 for a predetermined time (represented by black squares at the left end in FIG. 6), the heating driving of the heating elements n, n + 2, n + 3 and n + 5 is stopped (FIG. 6 , Represented by a white square at the left end). As a result, the fused portions 65 and 66 are formed on the stamped surface portion of the stamping material 8A that comes into contact with the heating elements n + 1 and n + 4. In addition, the non-fused portions 67, 68, and 69 are formed on the stamped surface portions that are in contact with the heating elements n, n + 2, n + 3, and n + 5.

Subsequently, as shown in FIG. 7, after the melting portions 65 and 66 of the printing material 8A are melted and solidified, the head carriage is moved in the direction of travel (arrows) substantially equal to the length of each heating element in the sub-scanning direction. 63 (in the direction of 63) to heat the heating elements n + 1 and n + 4 of the thermal head 62 for a predetermined time (represented by black squares at the left end in FIG. 7), while heating elements n, n + 2, n + 3 and n + 5. Is stopped (represented by a white square at the left end in FIG. 7). Thereby, each fusion part 65,66 and each non-fusion part 67,68,
69 are each extended in the traveling direction (the direction of the arrow 63) by a dimension substantially equal to the length dimension of each heating element in the sub-scanning direction.

Subsequently, as shown in FIG. 8, after the melting portions 65 and 66 of the printing material 8A are melted and solidified, the head carriage is moved in the direction of travel (arrows) substantially equal to the length of each heating element in the sub-scanning direction. 63), and each of the heating elements n, n + 1, n + 2, n + 3, n +
4, n + 5 is heated for a predetermined time (in FIG. 8, each left end is represented by a black square). As a result, a fused portion 70 is formed on the stamp surface of the stamp 8A in contact with each of the heating elements n, n + 1, n + 2, n + 3, n + 4, and n + 5. In addition, non-melting portions 67, 68, and 69 having a substantially square shape are formed.

Next, as shown in FIG. 9, after the melting portion 70 of the printing material 8A is melted and solidified, the head carriage is moved in the traveling direction (direction of arrow 63) by a dimension substantially equal to the length of each heating element in the sub-scanning direction. And heating and driving the heating elements n + 1 and n + 4 of the thermal head 62 for a predetermined time (represented by black squares at the left end in FIG. 9) while heating the heating elements n, n + 2, n + 3 and n + 5. (Represented by a white square at the left end in FIG. 9). This allows
Fused portions 71 and 72 are formed on the stamped surface portion of the stamping material 8A in contact with the heating elements n + 1 and n + 4. Further, the non-fused portions 73, 74, and 75 are formed on the stamped surface portions that are in contact with the heating elements n, n + 2, n + 3, and n + 5.

Subsequently, as shown in FIG. 10, after the melting portions 71 and 72 of the printing material 8A are melted and solidified, the head carriage is moved in the direction of travel (arrows) substantially equal to the length of each heating element in the sub-scanning direction. 63 (in the direction of 63) to heat the heating elements n + 1 and n + 4 of the thermal head 62 for a predetermined time (represented by black squares at the left end in FIG. 10), while heating elements n, n + 2, n + 3 and n + 5. Is stopped (represented by a white square at the left end in FIG. 10). As a result, each of the fused portions 71 and 72 and each of the non-fused portions 73, 74 and 75 are extended in the traveling direction (the direction of the arrow 63) by a dimension substantially equal to the length of each heating element in the sub-scanning direction.

Next, an example in which a non-transmitting portion through which the stamp ink does not transmit is formed on the printing surface of the printing material 8A by the thermal head 62 as described above will be described with reference to FIG. FIG. 11 is a diagram showing an example of a stamp material 8A mounted on the stamp 8 according to the second embodiment. FIG. 11A shows a stamp material 8 in which a non-transmissive portion is formed on a stamp surface by a thermal head 62.
FIG. 2A is a perspective view, and FIG. 2B is a partially enlarged perspective view schematically showing an example of the stamp face portion of FIG. In FIG. 11, the same reference numerals as those of the stamp 8 and the like according to the first embodiment denote the same or corresponding parts as those of the stamp 8 and the like. Figure 1
As shown in FIG. 1, the stamp 8A has fine open cells (in the second embodiment, the hole diameter is about 10 μm to 30 μm).
And formed into a thin plate of a porous resin such as polyurethane or polyethylene. Therefore, since the printing material 8A has open cells, it has a property of transmitting ink. Then, as described above, each heating element n of the thermal head 62,
By the heat generation drive of n + 1, n + 2, n + 3, n + 4, n + 5, etc., the pores of the surface portion of the stamp face of the stamp material 8A are melted and solidified in a lattice shape, and are formed of a thin film layer of several μm that does not allow the passage of stamp ink slightly lower than the surface height. Non-transmissive part 77
(A spot portion in FIG. 11B) is formed. On the other hand, each heating element n, n + 1, n which does not generate heat of the thermal head 62
+2, n + 3, n + 4, n + 5, etc., on the surface of the stamped surface of the stamping material 8A, a non-fused portion 7 having a substantially rectangular horizontal cross-section and having a pore portion through which ink penetrates and protruding outward.
8 are formed.

As described in detail above, the stamp 8 according to the second embodiment has the thin plate-shaped stamping material 8A formed of a porous resin having fine open cells attached to the upper surface. The non-transmissive portion 7 through which the stamp ink does not penetrate by the thermal head 62 is provided on the printing surface of the printing material 8A.
7 are formed in a lattice shape. Then, similarly to the stamp 8 according to the first embodiment, the non-transmissive portion 7 having a grid shape
The stamp 8 on which the stamp 7 is formed is attached to the carriage 9 of the stamp producing apparatus 1 and, via the ink-jet printer head 5, is formed in a substantially circular shape having a radius of a distance between the grids of the non-transmitting portions 77. Ink dots of color stamp ink (yellow (Y), magenta (M), cyan (C)) are applied (see FIG. 5).

Therefore, the color stamp ink applied to the stamp face of the stamp material 8A of the stamp 8 does not
Since the stamp inks of the respective colors are partitioned by this, it is possible to effectively prevent bleeding or turbidity of the colors. Further, since the non-transmissive portion 77 is formed by heating and melting, a thin film through which the stamp ink does not permeate due to the melting and solidification of the porous resin is easily applied to the surface of the stamping material 8A formed of the porous resin. Can be formed.
Further, since the non-transmissive portion 77 is formed by the selective heating driving of the heating elements n, n + 1, n + 2, n + 3, n + 4, n + 5, etc. of the thermal head 62, each of the substantially rectangular horizontal cross sections through which the color stamp ink penetrates is formed. The non-melted portion 78 can be miniaturized. In particular, when the color stamp ink is applied to the printing surface by the ink jet printer head 5 or the like, the non-fused portion 78 having a substantially rectangular horizontal cross section smaller than the diameter of the applied ink dot can be easily formed. Bleeding of the color stamp ink can be reliably prevented. In addition, the non-transmissive portion 77
Are formed in a lattice shape, so that each heating element n, n + 1, n + 2, n + 3, n + 4, n + 5 of the thermal head 62 is formed.
And the like, the heat drive control can be simplified, and the manufacturing cost of the stamp 8 can be further reduced. Further, a stamp 8 is formed by an ink jet printer head 5 or the like.
When applying the color stamp ink to the stamp surface of
Each dot of the color stamp ink has a plurality of non-fused portions 7.
The color stamp ink applied to the stamp face portion is divided by the non-transmissive portion 77 without positioning the non-melting portions 78 into which the color stamp ink permeates and the ink discharge ports are applied. In addition, the spread of the color stamp ink can be suppressed, and color bleeding and turbidity can be effectively prevented.

Next, a stamp according to a third embodiment will be described. The stamp according to the third embodiment has substantially the same configuration as the stamp 8 according to the first embodiment. However, the difference is that a non-permeable portion of the stamp material 8A attached to the upper surface of the stamp 8 and impermeable to stamp ink is formed by applying a sealant. Here, the step of forming a non-transmissive portion through which the stamp ink does not permeate on the stamped surface of the stamping material 8A of the stamp 8 according to the third embodiment is performed by first passing the sealant through the stamping portion of the stamping material 8A in a grid-like manner. A mask such as a silk screen on which is formed is placed. The width of the passage portion of the mask through which the sealant passes is formed to be larger than the pore diameter of the open cells of the stamping material 8A (in the third embodiment, the pore diameter is about 10 μm to 30 μm). In the third embodiment, the width of the passage portion of the mask through which the sealant passes is about 50 μm.) The distance between the passing portions is formed to be approximately equal to the length of about 1/4 of the diameter of the ink dot applied to the printing material 8A. Subsequently, after applying a sealing agent such as a silicon sealing agent from above the mask, the mask is removed.
As a result, the sealant applied in a grid pattern on the stamp face of the stamp material 8A is solidified, thereby forming a non-transmissive part on which the stamp ink in the grid form does not penetrate.

Next, an example will be described with reference to FIG. 12 in which a non-transmissive portion through which the stamp ink does not pass is formed by applying a sealant such as a silicone sealant to the stamp face of the stamp material 8A as described above. FIG. 12 is a view showing an example of a stamp material 8A to be mounted on the stamp 8 according to the third embodiment. FIG. 12A shows a non-transmissive portion formed by applying a sealing agent in a grid pattern through a mask such as a silk screen. Perspective view of the stamped material 8A,
FIG. 2B is a partially enlarged perspective view schematically illustrating an example of the stamp face portion of FIG. In FIG. 12, the same reference numerals as those of the stamp 8 and the like according to the first embodiment denote the same or corresponding parts as those of the stamp 8 and the like. As shown in FIG. 12, the stamp material 8A is made up of fine open cells (in the second embodiment,
The pore size is about 10 μm to 30 μm. ), And is formed in a thin plate shape of a porous resin such as polyurethane or polyethylene. Therefore, since the printing material 8A has open cells, it has a property of transmitting ink. Then, as described above, the sealant is applied in a grid pattern to the stamp face of the stamp material 8A via a mask such as a silk screen, and the pores in the surface portion of the stamp face of the stamp material 8A are covered in a grid pattern by the seal agent. . Thus, a non-transmissive portion 81 (a hatched portion in FIG. 12B) formed of a thin film layer having a thickness of several μm and not penetrating the stamp ink which is slightly higher than the surface height and not penetrating is formed. On the other hand, the surface of the printing surface of the printing material 8A to which the sealant is not applied has pores through which ink penetrates, and the length of one side is about の 長 of the diameter of the ink dot applied to the printing material 8A. A substantially square transmission portion 82 having a size substantially equal to the length is formed in a slightly depressed state.

As described in detail above, the stamp 8 according to the third embodiment has the thin plate-shaped stamping material 8A formed of porous resin having fine open cells attached to the upper surface. In addition, a sealant is applied in a grid pattern on a stamp face of the stamp material 8A via a mask such as a silk screen, and a non-transmissive portion 81 is formed in a grid pattern. And
Similarly to the stamp 8 of the first embodiment, the stamp 8 in which the grid-shaped non-transmissive portion 81 is formed on the stamp surface is attached to the carriage 9 of the stamp making apparatus 1, via the ink jet printer head 5. The ink dots of substantially circular color stamp inks (yellow (Y), magenta (M), and cyan (C)) whose radius is the distance between the grids of the non-transmissive portions 77 are applied (FIG. 5). reference).

Therefore, the color stamp ink applied to the stamp face of the stamp material 8A of the stamp 8 is
Since the stamp inks of the respective colors are partitioned by this, it is possible to effectively prevent bleeding or turbidity of the colors. In addition, the non-transmissive portion 81 is formed by applying a sealant on a surface of the porous resin by placing a mask having a lattice-like passage portion through which the sealant transmits, so that the stamp ink penetrates. It is possible to easily form a thin film that is not used. Further, when the color stamp ink is applied to the stamped surface of the stamp 8 by the ink jet printer head 5 or the like, each dot of the color stamp ink is applied over a plurality of transmission portions 82 so that the color stamp ink penetrates. The color stamp ink applied to the stamp surface portion is partitioned by the non-transmissive portion 81 without positioning the respective transparent portions 82 and the ink discharge ports, so that the spread of the color stamp ink is suppressed, and color bleeding and the like are prevented. Turbidity and the like can be effectively prevented.

Next, a stamp according to a fourth embodiment will be described. The stamp according to the fourth embodiment has substantially the same configuration as the stamp 8 according to the first embodiment. However, the difference is that the shape of the non-transmissive portion 43 formed on the stamp face of the stamp material 8A attached to the upper surface of the stamp 8 is formed in a substantially hexagonal honeycomb shape instead of a substantially square grid shape. Note that the same reference numerals as those of the stamp 8 and the like according to the first embodiment denote the same or corresponding parts as those of the stamp 8 and the like. Here, the bottom surface of the mold 35 used when forming a non-transmitting portion through which the stamp ink does not pass by the hot press is formed on the stamp surface of the stamp material 8A of the stamp 8 according to the fourth embodiment. It is almost the same in shape, and is configured to cover the entire surface of the stamp surface of the stamp material 8A during pressing (see FIG. 4B). Also, on the bottom of the mold 35,
A convex portion (not shown) formed in a substantially hexagonal honeycomb shape having a shape of a non-transmitting portion through which the stamp ink does not transmit formed on the stamp surface of the stamp material 8A is formed to protrude outward. The width of the projection is larger than the pore diameter of the open cell of the stamp 8A. Then, the mold is heated to a predetermined temperature in advance and hot-pressed on the stamped surface of the stamped material 8A, whereby the surface portion of the stamped portion of the stamped material 8A is melted into a substantially hexagonal honeycomb shape, and the non-transmissive portion 85 (FIG. 13)
Is formed. On the other hand, a non-melting portion 86 having a substantially hexagonal horizontal cross section protruding outward and having a pore portion through which ink penetrates is provided on the surface portion of the stamping surface portion of the stamping material 8A which does not contact the convex portion formed on the bottom surface portion of the mold 35. (See FIG. 13) is formed.

Next, the ink jet printer head 5 is attached to the stamp face of the stamp material 8A of the stamp 8 thus formed.
FIG. 13 shows an example in which a color stamp ink is applied by using FIG.
It will be described based on. FIG. 13 is a partially enlarged plan view showing an example in which a color stamp ink is applied to the printing surface of the printing material 8A of the stamp 8 according to the fourth embodiment by the ink jet printer head 5. As shown in FIG. 13, a non-transmissive portion 85 (thick linear portion in FIG. 13) through which the stamp ink does not penetrate is formed in a substantially hexagonal honeycomb shape on the stamp surface of the stamp material 8A. Further, ink droplets of yellow (Y) color stamp ink are applied to the printing surface portion of the printing material 8A via the inkjet printer head 5 with substantially circular dots 88 and 91 (in FIG. 13, hatched lines). Pattern circle). In addition, ink droplets of the magenta (M) color stamp ink are applied with substantially circular dots 90 (in FIG. 13, small checkered circles). Further, ink droplets of a cyan (C) color stamp ink are applied with substantially circular dots 89 (small spotted circles in FIG. 13). Accordingly, the hexagonal size of the non-transmissive portion 85 is determined by the size of each color stamp ink (yellow (Y), magenta (M), and cyan (C)) applied to the stamp surface via the ink jet printer head 5. It is formed to be about 1/7 the size of an ink dot. This allows
Each ink dot 88, 8 applied to the stamp surface of the stamp material 8A
9, 90, 91 are the ink dots 88, 89, 90,
It is blocked by a non-transmissive part 85 formed around 91.

As described in detail above, the stamp 8 according to the fourth embodiment has the thin plate-shaped stamping material 8A formed of a porous resin having fine open cells attached to the upper surface. Further, the non-transmissive portion 85 through which the stamp ink does not penetrate is formed into a substantially hexagonal shape having a size of about 1/7 of the ink dot on the stamp face of the stamp material 8A of the stamp 8 by a heat press using a mold heated to a predetermined temperature in advance. It is formed in a honeycomb shape. The stamp 8 having the substantially hexagonal honeycomb-shaped non-transmissive portion 85 formed on the stamp surface is attached to the carriage 9 of the stamp making apparatus 1, and is printed via the ink jet printer head 5 through a substantially circular color stamp. Ink dots of ink (yellow (Y), magenta (M), cyan (C)) are applied.

Therefore, the color stamp ink applied to the stamp face of the stamp material 8A of the stamp 8 does not
Since the stamp inks of the respective colors are partitioned by this, it is possible to effectively prevent bleeding or turbidity of the colors. Further, since the non-transmissive portion 85 is formed by heating and melting, a thin film that does not penetrate the stamp ink due to the fusion and solidification of the porous resin is easily applied to the surface of the stamping material 8A formed of the porous resin. Can be formed.
In addition, since the non-transmissive portion 85 is formed by hot pressing, the non-transmissive portion 8 is formed on the stamp face of the stamp material 8A by a single press.
5 can be formed, thereby improving the working efficiency and reducing the manufacturing cost. Further, since the shape of the convex portion formed on the bottom portion of the hot press mold is a substantially hexagonal honeycomb shape, the hot press mold can be easily manufactured, and the manufacturing cost of the stamp 8 can be further increased. Further reduction can be achieved. Further, when the color stamp ink is applied to the stamped surface portion of the stamp 8 by the ink jet printer head 5 or the like, each dot of the color stamp ink is applied over a plurality of non-fused portions 86, and the color stamp ink is applied. The color stamp ink applied to the stamp surface is partitioned by the non-transmissive portion 85 even without positioning the non-fused portions 86 that penetrate and the ink discharge ports, so that the spread of the color stamp ink is suppressed, and Bleeding and turbidity can be effectively prevented.

It should be noted that the present invention is not limited to the first to fourth embodiments, and various improvements and modifications can be made without departing from the scope of the present invention. It may be as follows. (A) In the first to fourth embodiments, the horizontal cross-sectional shape of the transmission portion formed on the stamp face of the stamp material 8A through which the stamp ink penetrates is a substantially square or a hexagon, but is substantially a triangle, a circle, or the like. It may be. This makes it easy to create a hot press mold and a mask for applying the sealant,
The manufacturing cost of the stamp can be reduced. (B) In the first to fourth embodiments, the non-transmitting portions 43, 77 through which the stamp ink does not transmit on one surface of the printing material 8A,
81, 85, but each of the non-transmitting portions 43, 77, 8
1, 85 may be formed on both surfaces of the stamp material 8A. Thereby, when attaching the stamp material 8A to the stamp 8, the stamp material 8A
Since it is not necessary to distinguish the stamp side of the stamp material, the attaching operation of the stamp material 8A is simplified, and the working efficiency can be improved. (C) In the first to fourth embodiments, the non-transmissive portions 43, 77, 81, and 85 are formed on the stamping material 8A cut into a predetermined shape. After forming a non-permeable portion through which stamp ink does not penetrate through the entire surface of the wide stamping material by applying a hot press or a sealant, the stamping material may be cut into a predetermined shape and attached to the stamp 8. As a result, the operation time for forming the non-transmissive portion can be shortened, and the manufacturing cost of the stamp can be further reduced. (D) In the first to fourth embodiments, the size of the penetrating portion of the printing surface of the printing material 8A through which the ink permeates is about 1/4 to about 1 of the ink dot diameter of the applied color stamp ink.
/ 7, but may be smaller. This allows
Color bleeding and turbidity can be effectively prevented. (E) In the first to fourth embodiments, the non-transmitting portions 43, 77, 81, and 85 through which the stamp ink does not pass are formed by applying a sealing agent through a hot press or a mask. Japanese Unexamined Patent Publication No. Hei 11-28851,
For example, it may be formed on the stamp face of the stamp material 8A. Thereby, a non-transmissive portion having an arbitrary shape can be further formed.

[0053]

As described above in detail, in the stamp according to the first aspect, the stamp material is formed of a porous resin having continuous cells that can be impregnated with the stamp ink. The printing surface of the printing material is defined by a non-transmitting portion, which is larger than the pore diameter of the open cell and has a predetermined width and is impermeable to stamp ink, to form a transmitting portion through which stamp ink having a predetermined pattern shape penetrates. Thus, since the stamp ink applied to each transmitting portion of the stamp surface is partitioned by the non-transmitting portion, the spread of the stamp ink can be suppressed, and a stamp can be provided that can prevent the bleeding of the seal. In particular, when the color stamp ink is applied to each transmitting portion of the stamp surface, the stamp ink of each color is partitioned by the non-transmitting portion, so that a stamp that can effectively prevent color bleeding and turbidity can be used. Can be provided.

In the stamp according to the second aspect, in the stamp according to the first aspect, since the non-permeable portion is formed by heating and melting, the porous portion is formed on the surface of the porous resin. It is possible to provide a stamp capable of easily forming a thin film through which stamp ink does not penetrate by melting and solidifying the conductive resin.

In the stamp according to the third aspect, in the stamp according to the second aspect, since the heating is performed by a hot press, the non-transmissive portion is formed on the stamp surface of the stamp material by a single press. Thus, it is possible to provide a stamp capable of improving work efficiency and reducing manufacturing cost. In addition, a non-transmissive portion is formed on the stamp surface of a wide stamp material by a single press, and by cutting this wide stamp material into a predetermined shape, a stamp material of a desired shape can be mass-produced, further increasing the manufacturing cost of the stamp. A stamp that can be reduced can be provided.

In the stamp according to the fourth aspect, in the stamp according to the second aspect, the heating is performed by selectively driving a heating element of a thermal head provided with a plurality of heating elements to generate heat. Will be This allows
Since the non-transmissive portion is formed by the selective heating drive of each heat generating element of the thermal head, it is possible to provide a stamp capable of miniaturizing a predetermined pattern shape of the transmissive portion through which the stamp ink penetrates. In particular, when stamp ink is applied to the printing surface by an ink jet printer head or the like, a transparent portion having a pattern shape smaller than the diameter of the applied ink dot can be easily formed, and the bleeding of the stamp ink is ensured. A stamp that can be prevented.

Further, in the stamp according to the fifth aspect, in the stamp according to the first aspect, the non-transmissive portion is formed by applying a mask having a predetermined pattern on a surface portion of the porous resin and applying a sealant. Therefore, it is possible to provide a stamp capable of easily forming a thin film through which the stamp ink does not penetrate. In addition, a mask is placed on the printing surface of a wide printing material to form a non-transmissive portion by a single application of a sealant, and the wide printing material is cut into a predetermined shape, whereby a printing material having a desired shape can be mass-produced. The stamp which can aim at reduction of the manufacturing cost of this can be provided.

In the stamp according to the sixth aspect, in the stamp according to any one of the first to fifth aspects, since the predetermined pattern shape is substantially a quadrangle, the mold shape of the hot press can be easily manufactured. It is also possible to easily produce a mask for applying a sealant,
It is possible to provide a stamp capable of further reducing the manufacturing cost of the stamp.

In the stamp according to the seventh aspect, in the stamp according to any one of the first to fifth aspects, since the predetermined pattern shape is substantially hexagonal, the shape of the hot press can be easily changed. It can be manufactured, and a mask for applying a sealant can be easily manufactured,
It is possible to provide a stamp capable of further reducing the manufacturing cost of the stamp.

Further, in the stamp according to the eighth aspect, in the stamp according to any one of the first to seventh aspects, the size of the predetermined pattern shape is a minimum dot of the stamp ink applied to the stamp surface portion. Is formed smaller than the size of. Thus, when the stamp ink is applied to the printing surface by an ink-jet printer head or the like, each dot of the stamp ink is applied over a plurality of transmitting portions, and the positioning of the transmitting portion of the stamp and the ink ejection port is performed. Since the stamp ink applied to the stamp surface portion is partitioned by each non-transmitting portion without performing the stamping process, it is possible to provide a stamp in which the spread of the stamp ink is suppressed and the blur of the stamp can be reliably prevented. . In particular, when the color stamp ink is applied to each transmitting portion of the stamp surface, the stamp ink of each color is surely partitioned by the non-transmitting portion, so that it is possible to more effectively prevent color bleeding and turbidity. Can provide a stamp that can be done.

[Brief description of the drawings]

FIG. 1 is a perspective view of a stamp forming apparatus for forming a stamp on a stamp face of a stamp material according to a first embodiment.

FIG. 2 is a block diagram illustrating a system configuration of a control unit of the stamp forming apparatus that forms a stamp on a stamp surface of a stamp material of the stamp according to the first embodiment.

FIG. 3 is a perspective view of a stamp provided on the upper surface of the stamp according to the first embodiment.

FIG. 4 is a view schematically showing an example in which a non-transmitting portion through which stamp ink does not pass is formed by hot pressing on a stamp face of the stamp according to the first embodiment, and FIG. FIG. 4B is a side cross-sectional view showing a state before formation, FIG. 4B is a side cross-sectional view showing a state where a non-transmissive portion of the stamp surface of the stamp material is melted, and FIG. It is a sectional side view which shows the state of.

FIG. 5 is a partially enlarged plan view showing an example in which a color stamp ink is applied to the stamp surface of the stamp material of the stamp according to the first embodiment by an ink jet printer head.

FIG. 6 is a diagram schematically illustrating an example of operation control of a thermal head in the case where a non-transmitting portion that does not transmit stamp ink is formed on a stamp surface of a stamp material of the stamp according to the second embodiment. 5 is a partially enlarged view showing a non-transmissive portion creation state of FIG.

FIG. 7 is a diagram schematically illustrating an example of operation control of the thermal head when the thermal head of FIG. 6 is moved in the advancing direction by a dimension substantially equal to the length dimension of each heating element in the sub-scanning direction. FIG. 4 is a partially enlarged view showing a non-transmissive portion creation state of the stamp face portion of FIG.

8 is a diagram schematically showing an example of operation control of the thermal head when the thermal head of FIG. 7 is moved in the advancing direction by a dimension substantially equal to the length dimension of each heating element in the sub-scanning direction. FIG. 4 is a partially enlarged view showing a non-transmissive portion creation state of the stamp face portion of FIG.

9 is a diagram schematically illustrating an example of operation control of the thermal head when the thermal head of FIG. 8 is moved in the advancing direction by a dimension substantially equal to the length dimension of each heating element in the sub-scanning direction. FIG. 4 is a partially enlarged view showing a non-transmissive portion creation state of the stamp face portion of FIG.

10 is a diagram schematically illustrating an example of operation control of the thermal head in a case where the thermal head of FIG. 9 is moved in the advancing direction by a dimension substantially equal to the length dimension of each heating element in the sub-scanning direction. FIG. 4 is a partially enlarged view showing a non-transmissive portion creation state of the stamp face portion of FIG.

FIGS. 11A and 11B are diagrams illustrating an example of a stamp material mounted on a stamp according to a second embodiment, in which FIG. 11A is a perspective view of a stamp material in which a non-transmissive portion is formed on a stamp surface by a thermal head, and FIG. It is the elements on larger scale which show an example of the stamp surface part of A) typically.

FIG. 12 is a view showing an example of a stamp material attached to a stamp according to a third embodiment. FIG. 12 (A) is a diagram in which a sealant is applied in a grid pattern through a mask such as a silk screen to form a non-transmissive portion. FIG. 3B is a perspective view of the stamping material, and FIG. 2B is a partially enlarged perspective view schematically showing an example of the stamp face portion of FIG.

FIG. 13 is a partially enlarged plan view showing an example in which a color stamp ink is applied to a printing surface of a printing material of a stamp according to a fourth embodiment by an ink jet printer head.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 stamp producing device 5 ink jet printer head 8 stamp 8A stamping material 35 type 36 heater 37 convex portion 43, 77, 81, 85 non-transmissive portion 44, 78, 86 non-melting portion 62 thermal head

Claims (8)

[Claims] 1. A stamp provided with a stamping material formed of a porous resin having continuous cells that can be impregnated with the stamping ink, wherein the stamping material forms a transmitting portion through which stamping ink having a predetermined pattern shape penetrates on a stamping surface portion. The stamp according to claim 1, further comprising a non-transmissive portion which does not penetrate the stamp ink which partitions the stamp surface portion, and wherein the non-transmissive portion is formed to have a predetermined width larger than a pore diameter of the open cell. 2. The stamp according to claim 1, wherein the non-transmissive portion is formed by heating and melting. 3. The stamp according to claim 2, wherein the heating is performed by a hot press. 4. The stamp according to claim 2, wherein the heating is performed by selectively driving the heating elements of a thermal head having a plurality of heating elements to generate heat. 5. The stamp according to claim 1, wherein the non-transmissive portion is formed by applying a sealant. 6. The stamp according to claim 1, wherein the predetermined pattern shape is substantially a quadrangle. 7. The stamp according to claim 1, wherein the predetermined pattern shape is substantially hexagonal. 8. The size of the predetermined pattern shape is smaller than the size of a minimum dot of the stamp ink applied to the stamp surface portion.
The stamp described in any of the above.