JPH0958105A - Ink impregnating material and stamp unit using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink impregnating material which can simply obtain a multicolor and noticeable perforated image and a stamp unit using the same. SOLUTION: Foam (ink impregnating material) is impregnated with nonmagnetic ink and magnetic ink. The nonmagnetic ink and the magnetic ink are alternately colored with different colors. Color change can be facilitated by stamping by operating or non-operating a magnetic field. As the stamp unit, the type that a stencil printing base plate 10 having an ink impermeable base material, foam, and a thermosensitive stencil base sheet made of thermoplastic film for forming a printing surface by covering the foam is thermally perforated and mounted at a stamp member (holder) 34 can be suitably used. A permanent magnet 45 is arbitrarily disposed between the member 34 and the plate 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink impregnated body for developing a plurality of colors and a stamp device using the ink impregnated body.

[0002]

2. Description of the Related Art Conventionally, as an ink impregnation body used for letterpress printing and stencil printing, one impregnated with a single color ink has been used. In letterpress printing, the letterpress is brought into contact with the ink impregnated body to transfer the ink from the ink impregnated body to the printing surface, and the printing surface is pressed against an object to be printed such as paper to print a stamp image.

On the other hand, in stencil printing, there is known one using a stencil printing original plate as described in, for example, Japanese Patent Laid-Open No. 4-166390. As shown in FIG. 6, the stencil printing plate 50 has a heat-sensitive stencil sheet 56 formed by adhering a thermoplastic film 52 and a porous substrate 54, and a heat-sensitive stencil sheet 56 on the porous substrate 54 side. The non-woven fabric 58 impregnated with the water-based or oil-based ink and the film 60 which is an ink impermeable substrate are sequentially laminated and adhered. In the stencil printing plate 50, a perforated image is formed by heating and melting the surface of the thermoplastic film 52 of the heat-sensitive stencil sheet 56 with a plate making apparatus using a thermal head. Hereinafter, the formation of the punched image is referred to as plate making.

Next, the stencil printing plate 50 thus prepared is
The stencil printing is performed by mounting on a holding body (hereinafter referred to as a stamp member) having a grip and pressing the stamp member against the printing paper. The nonwoven fabric 58 corresponds to an ink impregnation body, but the ink impregnated in the impregnation body is also a monochromatic ink.

[0005]

However, in the above-mentioned ink impregnated body and the stamp apparatus using the same, only one kind of water-based or oil-based ink is impregnated, that is, a single-color stamp image is formed. It is only formed. Therefore, when it is desired to form stamp images of the same shape in different colors, it is necessary to separately prepare an ink impregnated body (stencil printing master plate) containing inks of different colors, which is economically expensive and However, there is a problem that it is troublesome to replace the ink impregnated body (original plate for stencil printing) when changing colors.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to reduce the storage space of ink impregnated bodies (stencil printing master plates) which do not need to be replaced at the time of color change. (EN) Provided is an ink impregnated body which can be manufactured and is inexpensive, and a stamping device using the same.

[0007]

For this reason, the ink impregnated body according to claim 1 of the present invention comprises a non-magnetic ink colored in a predetermined color and a magnetic ink colored in a color different from the non-magnetic ink. When the stamp image is formed, the magnetic ink is attracted in the direction of the magnetic field by approaching the magnetic field of a magnet or the like when forming the stamp image, and when the stamp image is formed in this state, only the non-magnetic ink or the magnetic ink is formed. The stamp image is formed by only the stamp. That is, in the case of letterpress printing, the magnetic ink is transferred to the printing surface by bringing the printing surface into contact with the side where the magnetic field acts on the ink impregnated body, and the non-magnetic ink is transferred to the printing surface by bringing the printing surface into contact with the opposite side. Will be transcribed. Further, when no magnetic field is applied to the ink impregnated body, the magnetic ink and the non-magnetic ink are mixed, and the mixed color is transferred to the printing surface.

In the case of stencil printing, if a stencil is arranged on the side where the magnetic field acts on the ink impregnated body, a stamp image is formed by magnetic ink, and if a stencil is arranged on the opposite side, non-magnetic ink is formed. A stamp image will be formed. When the magnetic field is not applied to the ink impregnated body, the magnetic ink and the non-magnetic ink are mixed, and the stamp image is formed by the mixed color.

The stamp device according to claim 2 is
A stencil printing master plate comprising an ink impermeable base material, an ink impregnated body, and a heat-sensitive stencil base paper made of a thermoplastic film which covers the ink impregnated body and forms a printing surface, and the stencil printing master plate. A stamping device having a holding body for holding, the heat-sensitive stencil sheet of the stencil printing plate being heated and perforated during plate making, and the ink being transferred from the formed perforations to a transfer surface, in the ink impregnated body. A non-magnetic ink colored in a predetermined color and a magnetic ink colored in a color different from the non-magnetic ink are impregnated. Therefore,
Similarly to the case of the stencil printing according to claim 1, if the ink impregnated body is pressed while a magnetic field is applied to the heat-sensitive stencil sheet side having the perforations formed, only the magnetic ink passes through the perforations and is covered. A stamp image is transferred onto the print medium, and if pressure is applied while a magnetic field is applied to the opposite side, only the nonmagnetic ink is transferred as a stamp image onto the print medium through the perforations. When a magnetic field is not applied to the ink impregnated body, the magnetic ink and the non-magnetic ink are transferred as a stamp image to the print medium through the perforations, and the stamp images of another color are mixed by mixing them. Will be formed. Further, the stamp device according to claim 3 is miniaturized because a magnetic field acts on the ink impregnated body of the stencil printing plate by the magnetic field generating means provided between the holding body and the stencil printing plate. It will be possible.

Further, the stamp device according to claim 3 is
Since the magnetic field generating means is a removable magnet, it is inexpensive.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment in which the present invention is embodied in a stamp device will be described below with reference to the drawings.

The construction will be described with reference to FIG. 1 which is a sectional view of an original plate for stencil printing of the present invention and FIG. 2 which is an exploded perspective view thereof.
The stencil printing plate 10 is roughly divided into a heat-sensitive stencil sheet 12 composed of a thermoplastic film 11 and a porous support 13, and an ink-impregnated foam (ink-impregnated body) 1
A frame 18 in which an opening 181 is formed so as to surround 6
And a film 20 which is an ink impermeable base material. On one side surface of the frame body 18, the porous support 13 side of the heat-sensitive stencil sheet 12 is adhered and fixed by an adhesive layer 15. In addition, the opening 18 of the frame body 18
The foamed body 16 is accommodated in 1, and a film 20 is further adhered and fixed to the other side surface of the frame 18 by an adhesive layer 15. Therefore, the foam 16 is
0, the frame 18, and the heat-sensitive stencil sheet 12 are covered. Here, the foam body 16 is formed to be thicker than the frame body 18.

As the material of the thermoplastic film 11 used for the heat-sensitive stencil sheet 12, a thickness of 2 is used in this embodiment.
μm polyethylene terephthalate film (hereinafter PE
T film). Other examples include films of polypropylene, vinylidene chloride-vinyl chloride copolymer and the like.

When a PET film is used, its thickness is preferably 1 μm to 4 μm. PET less than 1 μm
The film is not practical due to high manufacturing cost and weak strength. On the other hand, with a general thermal head, 50 mJ / m
4 μm because only energy of about m ² can be applied
It is not possible to perforate using the above.

The porous support 13 is made of, for example, natural fibers such as Manila hemp, Kozo, Mitsumata, synthetic fibers such as polyethylene terephthalate, polyvinyl alcohol, polyacrylonitrile, and semi-synthetic fibers such as rayon as a main raw material. Thin paper is used.

As shown in FIG. 2, the heat-sensitive stencil sheet 12 having the above-described structure has four sides bonded to a frame 18 having an opening 181 corresponding to the size of the foam 16 in the center. The film 20 is adhered by the adhesive layer 15, and the film 20 is adhered by the adhesive layer 15 on the opposite side of the frame 18.

The stencil printing plate 10 described above is made by a plate making apparatus (not shown). As a plate making device, the surface of the thermoplastic film 11 of the heat-sensitive stencil sheet 12 is selectively heated by a thermal head so that mirror image printing is performed according to the print information, and a predetermined portion of the thermoplastic film 11 is heated and melted. A device for piercing is used. During plate making,
The thermal head is a stencil printing master plate 1 with a predetermined pressing force.
0, and perforations are formed in the stencil sheet 12.

As the foam 16, a foam having a cell diameter of 0.2 mm or more, preferably 0.4 mm or more and having continuous cells is preferably used. If the bubble diameter is less than 0.2 mm, not only impregnation becomes difficult, but also the movement of the ink inside the foam becomes difficult, and if ink is consumed on a part of the plate, it will not be possible to replenish the ink from the surrounding area. Sufficient and the perforated image is blurred. Examples of the material of the foam 16 include polyurethane, NBR (acrylonitrile butadiene rubber), and polyethylene.

As shown in FIG. 3, the foam 16 of the stencil printing plate of the present embodiment has a predetermined color (for example, yellow).
Two types of ink that are incompatible with each other, a first ink 1 that is a non-magnetic ink that is colored in the first color and a second ink 2 that is a magnetic ink that is colored in a color different from the first ink (for example, green) Is impregnated. As a method of impregnation,
It can be performed by vacuum impregnation or the like. As the non-magnetic ink, water-based ones and oil-based ones can be used. As the magnetic ink, one containing iron as a component is preferable.

As the composition of these inks, the first ink 1 which is a non-magnetic ink may be one produced by a known method. The second ink 2, which is a magnetic ink, is a colloid liquid in which a so-called colloid-sized magnetic substance fine powder having a particle size of about 100 or less is dispersed in a liquid phase, which is generally called a magnetic fluid. be able to. As a means for coloring the magnetic fluid, there is a method of incorporating a pigment, a dye or the like.
Further, as the magnetic fine powder, for example, Fe ₃ O ₄ , γ-
Fe ₂ O ₃ , Co-γ-Fe ₂ O ₃ , CrO ₂ , BaO · 6Fe
₂ O _{3 and the} like.

Foam 16 impregnated with these two inks
A master plate 1 for stencil printing containing a sheet and made by a plate making device.
0 is attached to the non-magnetic stamp member 34 as shown in FIG. The stamp member 34 includes a handle portion 36 and a mounting recess 361. In the mounting recess 361, the non-magnetic spacer 44 and the cushion layer 38 are provided.
And the first attachment portion A to which the adhesive layer 40 is sequentially adhered
And the cushion layer 38 on the permanent magnet (magnetic field generating means) 45.
And the second attachment portion B to which the adhesive layer 40 is sequentially adhered
And are interchangeably attached. Instead of such a configuration, only the permanent magnet 45 may be attached to and detached from the stamp member 34. The film 20 surface side of the stencil printing master plate 10 is adhered and held to the pressure-sensitive adhesive layers 40 of the first mounting portion A and the second mounting portion B. Since the stencil printing plate 10 is only held via the adhesive layer 40, it can be easily peeled off if necessary.

The stamp member 3 is attached to the first mounting portion A.
4, the stencil printing plate 10 that has been plate-made and held by the stamp member 34 is pressed against a printing paper (transfer surface) 42 as a medium to be printed.
The first ink 1 which is a non-magnetic ink which is compressed and impregnated therein and the second ink 2 which is a magnetic ink ooze out from the perforated portion of the printing surface, and the first ink 1 and the second ink 2 are printed on the printing paper 42. Both inks of the second ink 2 are transferred. At this time, the stamp image appears as a mixed color of two inks having different tones (for example, when the first ink 1 is yellow and the second ink 2 is green, the color mixture is yellowish green). .

Next, the second mounting portion B is attached to the stamp member 34, and the stencil printing plate 10 produced by plate making.
When the stamp paper 34 is held by the stamp member 34 and is pressed against the printing paper (transfer surface) 42, the magnetic ink (magnetic field) of the permanent magnet 45 causes the second ink 2 which is magnetic ink inside the foam 16. Only the first ink 1 which is attracted to the 45 side and which is a non-magnetic ink is printed from the heated perforated portion of the thermoplastic film 11 of the stencil printing plate 10 to the printing paper 42.
Is transferred to. Therefore, the stamp image is formed on the printing paper 42 only with the first ink 1.

As described above, by selectively using the first mounting portion A and the second mounting portion B (making the magnetic field act or not act on the ink impregnated body) as necessary, 2 A color stamp image can be formed.

A mode in which a permanent magnet is arranged on the thermoplastic film side of the stencil printing plate 10 is also possible.
In that case, the second ink 2, which is a magnetic ink, is attracted to the permanent magnet 45 side (thermoplastic film side) inside the foam body 16, and the stamp member 34 is pressed against the printing paper 42, so that the second ink The stamp image can be formed only with the ink 2. In this embodiment, a cap is attached to the stamp member 34 so as to cover the thermoplastic film of the stencil printing plate 10, and a cap having a structure in which a permanent magnet is held is prepared, and a stamp image (imprint) is formed. It is possible that the cap was removed immediately before.

It should be noted that the present invention is not limited to the above-described embodiment, but various modifications can be made. For example, as the magnetic field generating means, not only the above-mentioned permanent magnet but also an electromagnet can be adopted. In this case, when the magnetic field is applied to the ink impregnated body, the electromagnet is energized, and when the magnetic field is not applied to the ink impregnated body, the energization may be released. There is no need to remove it, and there is no risk of losing it.

In addition, as an embodiment, not only the stencil printing method described above but also a relief printing method can be used. That is, it is possible to apply the ink impregnated body to a stamp stand fixed on a support plate. In this case, the stamp surface of the stamp member is prepared as a shape protrudingly formed into a predetermined shape, and the stamp surface is brought into contact with the ink impregnated body, but a magnetic field such as a permanent magnet or an electromagnet is generated on the stamp member side. Means should be provided. Since the description of the mode is obvious from the description of the ink impregnated body and the stamp member 34 of the above-described embodiment, further detailed description will be omitted.

[0028]

As is apparent from the above description, the ink impregnated body according to claim 1 has a non-magnetic ink colored in a predetermined color and a magnetic material colored in a color different from the non-magnetic ink. Since it is impregnated with ink, there is no need to replace the ink impregnated body (stencil printing master plate) at the time of color change, and the storage space for them can be reduced, and at the same time, it is inexpensive.

On the other hand, the stamp device according to claim 2 is
A stencil printing master plate comprising an ink impermeable base material, an ink impregnated body, and a heat-sensitive stencil base paper made of a thermoplastic film which covers the ink impregnated body and forms a printing surface, and the stencil printing master plate. A stamping device having a holding body for holding, the heat-sensitive stencil sheet of the stencil printing plate being heated and perforated during plate making, and the ink being transferred from the formed perforations to a transfer surface, in the ink impregnated body. A non-magnetic ink colored in a predetermined color and a magnetic ink colored in a color different from the non-magnetic ink are impregnated. Therefore,
Similar to the case of the stencil printing according to the first aspect, there is no need to replace the ink impregnated body (stencil printing original plate) at the time of color change, and it is possible to reduce the storage space thereof, and it is also inexpensive.

The stamp device according to claim 3 is
Since the magnetic field is applied to the ink impregnated body of the stencil printing plate by the magnetic field generating means provided between the holder and the stencil printing plate, in addition to the effect of claim 2, easy and reliable color change can be performed. It has an effect that it can be realized and can be miniaturized.

The stamp device according to a fourth aspect is
Since the magnetic field generating means is a detachable magnet, it has the effect of being inexpensive in addition to the effect of claim 3.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an original plate for stencil printing according to an example of the present invention.

FIG. 2 is an exploded perspective view of the stencil printing plate.

FIG. 3 is an explanatory diagram of a foam body (ink-impregnated body) impregnated with magnetic ink and non-magnetic ink.

FIG. 4 is an explanatory diagram showing a stamp member to which a second mounting portion B is mounted.

FIG. 5 is an explanatory diagram showing a stamp member to which a first mounting portion A is mounted.

FIG. 6 is a cross-sectional view of a conventional stencil printing plate.

[Explanation of symbols]

 1 1st ink which is a non-magnetic ink 2 2nd ink which is a magnetic ink 10 Stencil printing master plate 11 Thermoplastic film 12 Thermosensitive stencil base paper 13 Porous thin paper 16 Foam 44 Spacer 45 Permanent magnet

Claims (4)

[Claims] 1. An ink impregnated body in which a non-magnetic ink colored in a predetermined color and a magnetic ink colored in a color different from the non-magnetic ink are impregnated. 2. A stencil printing plate comprising an ink impermeable base material, an ink impregnated body, and a heat-sensitive stencil sheet made of a thermoplastic film which covers the ink impregnated body and forms a printing surface, and the same. And a holder for holding a stencil printing plate, the heat-sensitive stencil sheet of the stencil printing plate is perforated by heating during plate making, in the stamp device in which ink is transferred from the formed perforations to the transfer surface, the ink A stamp device, wherein the impregnated body is impregnated with a non-magnetic ink colored in a predetermined color and a magnetic ink colored in a color different from the non-magnetic ink. 3. The stamp device according to claim 2, wherein magnetic field generating means is provided between the holder and the stencil printing plate. 4. The stamp device according to claim 3, wherein the magnetic field generating means is a removable magnet.