JPH1029363A - Plate making method for stamp and plate for stamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce expendables and to certainly execute the plate making of a stamp. SOLUTION: A light pervious manuscript sheet 26 having a desired image line part 21 is superposed on the surface of a substrate 25 for a stamp composed of a foamable resin material containing 0.1-15wt.% of carbon black in a dispersed state and having open cells to be capable of being impregnated with stamp ink to be pressed thereto and the whole is irradiated with light on the side of the manuscript sheet 26 to absorb light energy by carbon black in the foamable resin material to melt the entire surface of the plate 25 for the stamp and the melted surface is solidified to become stamp ink non bleeding parts 23a, 23b and the image line part 21 and the surface of the stamp ink non- bleeding part 23a opposed thereto are fixed. Subsequently, the manuscript sheet 26 is peeled from the surface of the plate 25 for the stamp and the ink non- bleeding part 23a is peeled at the place corresponding to the image line part and a stamp having a printing surface as a stamp bleeding part 24 can be produced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cell having an open cell,
A stamp substrate for forming an ink exuding portion for a desired image portion and an ink non-exuding portion for a non-image portion on a surface of a porous sheet that can be impregnated with stamp ink, and a stamp using the stamp substrate. The method relates to a method for making a plate.

[0002]

2. Description of the Related Art Conventionally, various printing apparatuses such as stamps have been used to print desired images such as pictures and characters on a print medium such as a postcard. Of these, Japanese Patent Laid-Open No. 7-2
In Japanese Patent No. 85258, a stamped surface including an ink exuding portion that becomes a mirror image of a desired imprint original and an ink non-exuding portion that closes the continuous bubbles is formed on the surface of a sheet that has continuous bubbles and can be impregnated with stamp ink. A method for manufacturing a multicolor stamp has been proposed in which a printing plate is used, a plurality of colors of ink are directly sucked into the ink exuding portion of the printing plate, and a printing medium such as a postcard is pressed against the printing plate surface for printing. .

In the above publication, as a first method for manufacturing (plate making) a printing plate having a printing surface formed of an ink bleeding portion which is a mirror image of a predetermined imprint document and a non-ink bleeding portion which closes open cells, is provided. A heat transfer sheet is superimposed on the surface of a material sheet that has open cells and can be impregnated with stamp ink, and an original sheet having a desired imprint is superimposed thereon so as to be a mirror image. By irradiating infrared rays from above, a transfer portion and a non-transfer portion of the heat transferable ink are formed on the surface of the material sheet, the transfer portion becomes the ink non-exuding portion, and the non-transfer portion becomes the ink exuding portion. It is disclosed to have.

[0004] In a second method, a heating plate made of at least one selected from the group consisting of carbon and a polymer substance is placed on the surface of a material sheet having open cells and impregnated with stamp ink, Further, by impregnating a hard-to-evaporate substance into a document sheet having a desired imprint made of a liquid-absorbing opaque sheet so that the imprint document image becomes a mirror image, and then irradiating a flash containing infrared rays from the document sheet side The heating plate corresponding to a portion other than the imprint original image generates heat and melts the surface of the material sheet to form an ink non-exuding portion, while the surface of the material sheet corresponding to the imprint original image forms an ink exuding portion without melting. It is disclosed to have a stamped surface.

[0005]

According to the former method of manufacturing a stamp according to the prior art, a thermal transfer sheet must be interposed between a material sheet and an original sheet.
Therefore, unless the thermal energy of the infrared light irradiated from the original sheet side is increased, the thermal energy is absorbed by the original sheet and the thermal transfer sheet, and the transfer portion of the thermal transfer ink of the thermal transfer sheet adheres to the surface of the material sheet ( Fixation)
Adhesive strength is weakened and it is easy to peel off after plate making,
There is a problem that it is likely that the non-ink bleeding portion on the surface of the material sheet tends to be incomplete. In addition, the surface of the thermal transfer sheet to which the thermal transfer ink has been applied must be directly adhered to the surface of the material sheet. If the front and back of the thermal transfer sheet are mistaken, plate making cannot be performed.

Further, there is a problem that extra running cost is required due to the thermal transfer sheet as a consumable. According to the latter of the stamp manufacturing methods of the prior art, a heating plate coated with an ink containing carbon or the like on a PET film must be interposed between the material sheet and the manuscript sheet. A liquid-absorbing opaque sheet needs to be made transparent or translucent by infiltrating a hardly volatile substance into the sheet, and there is a problem that there are many consumables for these and the operation becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and provides a stamp making method and a stamp substrate that can reduce the number of consumables and simplify the plate making operation. The purpose is to do so.

[0008]

According to a first aspect of the present invention, there is provided a stamp making method according to the first aspect of the present invention, wherein carbon black or a light energy-absorbing substance is dispersed and contains open cells. By irradiating light from the original sheet side in a state where a light-transmissive original sheet having a desired image portion is overlapped and pressed on the surface of a stamp substrate made of a porous sheet that can be impregnated with stamp ink, And melting and solidifying the entire surface of the stamp substrate, fixing the image portion and the corresponding surface of the stamp substrate, and then peeling the original sheet from the surface of the stamp substrate.

[0009] The stamp substrate to be used in the stamp plate-making method is a porous sheet having open cells and impregnated with stamp ink, as described in the second aspect of the present invention. % By weight of carbon black or a light energy attracting substance dispersed therein. Further, the porous sheet in the stamp substrate is preferably a polyurethane resin material.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described. FIG. 1 is a schematic side sectional view showing a stamp unit for making a stamp using the stamp substrate of the present invention, and printing on a postcard or the like using the stamp made by the stamp, and FIG. 2 shows a movable lid opened. It is a schematic sectional side view of the stamp unit of a state.

In FIG. 1 and FIG. 2, the stamp unit 1 basically comprises a plate making section 2 (upper side of the stamp unit 1) and a printing section 3 (lower side of the stamp unit 1). 3 is configured to be separable. That is, the upper and lower sides of the bottomed case 7 of the printing unit 3 are engaged with and disengaged from the upper edge of the side of the bottomed case 7 of the printing unit 3 by the lock claws 5 with biasing springs 6 provided on the lower sides of the case 4 of the plate making unit 2. The case 4 is stacked on the
Can be separated from the bottomed case 7 to take out the article on the bottomed case 7 and to perform a printing operation as described later.

First, the structure of the plate making section 2 will be described. A recess 13 having a substantially rectangular shape in plan view is formed in the upper portion of the case 4 via a stepped portion 12 having four rounds in plan view.
3a is provided with a socket hole 14 in which a flash valve 15 can be detachably mounted, and a contact member 16 is arranged on the lower surface side of the socket hole 14. A sheet (not shown) having excellent light reflection characteristics, such as aluminum foil, is adhered to the surface of the recess 13. A transparent plate 17 such as a transparent acrylic plate is removably mounted on the step portion 12.

An outer lid 8, an intermediate lid 9, and an inner lid 10, which are movable lids, are provided on the upper left and right sides of the case 4 on pivot pins 18, 1 respectively.
It is pivotally attached to open and close freely via 9, 20 respectively.
On the lower surface of the inner lid 10, a flat pressing member 27 such as a sponge or a rubber for pressing a stamp substrate 25 and a light-transmitting original sheet 26, which will be described later, and pressing the upper surface of the transparent plate 17 with uniform pressure is provided. It is stuck. The intermediate lid 9 is attached to the inner lid 1
On the lower surface side when it is arranged on the upper surface of the zero, a press bulging portion 28 for uniformly pressing the upper surface of the inner lid 10 at a plurality of locations is integrally formed. A handle 2 is provided on the outer surface of the outer lid 8.
9 and a hook 31 on the free end side of the outer surface of the outer lid 8 for engaging and disengaging with a hole-shaped engaging portion 30 of the case 4.
Are mounted so as to urge in the engagement direction via a torsion spring 32. Further, when the outer lid 8 is overlaid on the upper surface of the intermediate lid 9, at least two pressing bulges 33 are formed for pressing the intermediate lid 9 almost uniformly.

The engaging portion 30 is provided with a switch (not shown), a new flash valve 15 is mounted in the socket hole 14, the transparent plate 16 is fitted into the step 12, and the transparent plate 16 is inserted. An original sheet 26 is placed on top of the original sheet 26, and a stamp substrate 25 to be described later is placed thereon.
When the worker applies the predetermined pressing force and locks the hook 31 to the engaging portion 30 by superimposing the intermediate cover 9 and the outer cover 8 sequentially, the switch portion is turned on to flash the flash valve 15. Can be.

Next, the configuration of the printing unit 3 will be described. The stamped plate 40 is placed with its image area (marked surface) facing down between the pair of positioning projections 35 of the support table 34 on the upper surface of the bottomed case 7 removed from the case 4,
After applying a double-sided adhesive tape (not shown) to both ends of the back side (opposite to the stamped surface) of the prepressed stamp 40, the pressing roller 37 is also taken out from the pressing roller holder on one side of the bottomed case 7. When the side surface of the handle 36 is brought into contact with the second positioning projection 38 and the pressing roller 37 is rolled and moved from that state, the stamp 40 is formed on the peripheral surface of the pressing roller 37.
Is wound and fixed. Then, the stamp 4
After the ink of a predetermined color is sucked into the ink bleeding portion 24 corresponding to the image portion of No. 0 and the ink attached to the ink non-bleeding portion 23b is wiped off, the pair of positioning protrusions 3 of the support base 34 are removed.
A sheet (not shown), which is a printing medium, is placed between the rollers 5 and 35, and is rolled while pressing the pressing roller 37 with the handle 36, thereby completing printing on the sheet. In addition, it is a matter of course that a multicolor printing stamp is obtained by injecting another color of stamp ink into another portion of the ink exudation portion 24.

Next, the configuration of the stamp substrate 25 of the present invention and a plate making method using the same will be described in detail. The stamping substrate 25 is a material having continuous cells and a porous material that can be impregnated with the stamp ink and containing carbon black or a light energy-absorbing substance dispersed therein. The basic material is a polyolefin-based material. It is preferably a foamed resin material such as a resin, a polyvinyl chloride-based resin, and a polyurethane-based resin, and has flexibility (softness) when formed on a porous sheet. It is also possible to use a rubber-based material. The thickness of the stamp substrate 25 is 1 mm to 5 mm.
mm.

As described above, by containing carbon black or a light energy-absorbing substance, when the surface side of this type of stamp substrate 25 is heated, it is melted and the pores exposed on the surface are closed. Will be. Further, after the surface side of the stamp substrate 25 is melted in the compressed state, it is solidified and becomes an ink non-exuding portion, and the undissolved portion becomes an ink exuding portion where the pores are exposed on the surface.

In the examples, the weight ratio of the carbon black or the light energy-absorbing substance contained is such that the content ratio of the carbon black to the polyurethane foamed resin is 1.
0% to 1.5% by weight. The content of carbon black is not limited to the above, but may be 0.1% by weight.
It may be in the range of ~ 15% by weight. If the content of carbon black is larger than 15% by weight, the stamp substrate 25 itself becomes black, and it becomes impossible to know the color of the applied stamp ink, and it is also impossible to know whether or not the stamp ink has been applied. If it is less than 0.1% by weight, sufficient heat generation cannot be obtained.
There is a problem that the surface of the stamp substrate 25 cannot be melted.

Further, as the light energy attracting substance,
There are silver chloride and silver bromide. When using the plate making unit 2 as a stamp plate making method, first, as a document sheet 26, a black ink, a water-based marker or the like is used to apply black ink or a water-based marker to the surface of a light-transmissive sheet such as PPC paper (document paper for tracing). Is drawn. Then, the original sheet 26 is placed on the surface of the transparent plate 17 with the image area 21 facing upward, and the image area 21 and the stamp substrate 25 are placed on top of each other. The inner lid 10, the intermediate lid 9, and the outer lid 8 are sequentially stacked on the upper surface of the substrate 25 and pressed to flash the flash valve 15 from the lower surface side of the transparent plate 17 (FIG. 3A).
reference). The irradiation light contains an infrared component.
Instead of the flash bulb 15, a chargeable strobe lamp for photography or the like may be used.

In this way, the carbon black near the surface of the stamp substrate 25 (the surface on the light irradiation side) absorbs heat by the light energy, the surface of the stamp substrate 25 is heated and melted, and then solidified. An ink non-bleeding portion having a predetermined thickness is formed. At this time, the amount of light energy absorbed per unit area in the black image portion 21 is
Since it is larger than the amount of light energy absorbed per unit area in the non-image area, the ink non-exuding section 23 facing the
a and the image portion 21 have a large adhesive force. In other words, a step is generated so that the portion corresponding to the image portion 21 absorbs more heat on the surface of the stamp substrate 25 than the portion corresponding to the non-image portion. The adhesion of the ink non-exuding portion 23a is increased, while the ink non-exuding portion 23b corresponding to the non-image portion has little adhesion to the surface of the document sheet 26.

Therefore, after the light irradiation, the original sheet 26
Is peeled off from the surface of the stamp substrate 25 with the ink non-bleeding portion 23a adhered to the surface of the image portion 21 and pierced according to the shape of the image portion 21 to expose pores. The ink exuding portion 24 becomes the ink exuding portion 24, and the ink non-exuding portion 23 b corresponding to the non-image portion is formed by the stamp substrate 25
The stamp 40 of the predetermined sign surface is left on the surface of
(See FIGS. 3C and 4).

[0022]

According to the plate making method of the first aspect of the present invention, a porous sheet that contains carbon black or a light energy-absorbing substance dispersed therein and has open cells and can be impregnated with stamp ink. By irradiating light from the original sheet side in a state in which a light-transmissive original sheet having a desired image portion is overlapped and pressed on the surface of the stamp substrate made of carbon black or light energy absorbing property The substance absorbs light energy to melt the entire surface of the stamp substrate, and then solidifies to form a stamp ink non-bleeding portion, and the image portion and the surface facing it are fixed. Next, by peeling the original sheet from the surface of the stamp substrate, a stamp ink non-exuding portion corresponding to the image area is exfoliated, and a stamp having a stamped surface as a stamp ink exuding portion can be made.

In this case, as in the prior art,
Since there is no need to interpose a black heating plate, which is a consumable, there is an effect that the running cost of plate making can be reduced. The stamp substrate to be used in the stamp plate making method has a pore size of 0.1 to 15% by weight in a porous sheet having open cells and impregnated with stamp ink. When carbon black or a light energy-absorbing substance is dispersed and contained, a stamp ink non-exuding portion that can be fixed to the surface of the image portion of the original sheet and a stamp ink non-exuding portion that does not adhere to the surface of the non-image portion The light energy step that can be absorbed by the contained carbon black can be increased so that the difference can be clarified, and the contour of the image portion when plate-making is performed can be clarified.

Furthermore, when the porous sheet in the stamp substrate is made of a polyurethane resin material, the permeability and retention of the stamp ink are improved, and the stamp sheet can be made suitable for printing a large number of stamps. Is played.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view showing a stamp unit.

FIG. 2 is a schematic side sectional view showing a stamp unit with a movable lid opened.

FIG. 3A is a cross-sectional view at the time of light irradiation in a plate making operation,
FIG. 2B is a cross-sectional view showing a state in which the image portion of the original sheet is fixed to the surface of the stamp substrate, and FIG.

FIG. 4 is a perspective view of a stamp in a plate-making finished state.

[Explanation of symbols]

 Reference Signs List 17 transparent plate 21 image area 23a, 23b ink non-exuding section 24 ink exuding section 25 stamping board 26 document sheet

Claims (3)

[Claims] 1. A desired image portion is formed on a surface of a stamp substrate made of a porous sheet containing carbon black or a light energy-absorbing substance dispersed therein and having continuous cells and impregnable with a stamp ink. In a state in which the light-transmitting original sheets having the same are overlapped and pressed, by irradiating light from the original sheet side, the entire surface of the stamp substrate is melted and solidified, and the image portion and the stamp substrate corresponding thereto are formed. A plate making method for a stamp, comprising fixing the original sheet to the surface of the stamp substrate and then peeling the original sheet from the surface of the stamp substrate. 2. A stamp substrate comprising 0.1 to 15% by weight of carbon black or a light energy-absorbing substance dispersed in a porous sheet having open cells and impregnable with stamp ink. 3. The stamp substrate according to claim 2, wherein the porous sheet is a polyurethane resin material.