JP3861933B2 - Stamp making process - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a process for making a stamp for forming an ink exuding portion for a desired image line portion and an ink non-exuding portion for a non-image area on the surface of a porous sheet having open cells and impregnated with stamp ink. Is about how to do.
[0002]
[Prior art]
Conventionally, various printing devices such as stamps have been used to print a desired print image such as a picture or a character on a print medium such as a postcard. Among them, in JP-A-7-285258, an ink exuding portion that forms a mirror image of a desired imprinted document on the surface of a sheet that has continuous bubbles and can be impregnated with stamp ink, and an ink non-exuding portion that blocks the continuous bubbles. A multi-color stamp that uses a printing plate with a printing surface consisting of the following: directs inhalation of multiple colors into the ink exudation portion of the printing plate, and presses a printing medium such as a postcard onto the printing plate surface. Manufacturing methods have been proposed.
[0003]
In the above publication, as a first method for producing (plate making) a printing plate formed with an ink exuding portion that is a mirror image of a predetermined imprinted document and an ink non-exuding portion that is closed with continuous bubbles, continuous bubbles are produced. A sheet for thermal transfer is superimposed on the surface of the material sheet that can be impregnated with the stamp ink, and a document sheet having a desired imprint is superimposed on the surface of the material sheet so as to form a mirror image, and the material sheet is compressed from above the document sheet. By irradiating flash light containing infrared rays, a transfer portion and a non-transfer portion of the heat transferable ink are formed on the surface of the material sheet, and the transfer surface becomes the ink non-exudation portion and the non-transfer portion becomes the ink exudation portion. It is disclosed to have.
[0004]
As a second method, a heating plate made of at least one selected from the group consisting of carbon and a polymer substance is layered on the surface of a material sheet that has open cells and can be impregnated with stamp ink, and further absorbs it. An imprinted original is made by infiltrating a hardly volatile substance into a manuscript sheet having a desired imprint made of a liquid opaque sheet so that the imprinted manuscript image becomes a mirror image, and then irradiating flash light including infrared rays from the manuscript sheet side. The heating plate corresponding to the part other than the image generates heat and melts the surface of the material sheet to form an ink non-exuded portion, while the surface of the material sheet corresponding to the imprint original image does not melt and forms a printing surface that becomes an ink exuding portion. It is disclosed to have.
[0005]
[Problems to be solved by the invention]
However, according to the former of the prior art stamp manufacturing methods, a thermal transfer sheet has to be interposed between the material sheet and the original sheet, which increases the thermal energy of light irradiated from the original sheet side. Otherwise, the heat energy is absorbed by the original sheet and the thermal transfer sheet, and the adhesive force of the transfer part of the thermal transfer ink of the thermal transfer sheet to adhere (adhere) to the surface of the material sheet is weakened and easily peeled off after plate making. Therefore, there has been a problem that it is likely to be incomplete to form an ink non-exuded portion on the surface of the material sheet. In addition, the surface of the thermal transfer sheet to which the thermal transfer ink has been applied must be brought into direct contact with the surface of the material sheet. If the front and back sides of the thermal transfer sheet are mistaken, there is a problem that the plate cannot be made.
[0006]
In addition, since a thermal transfer sheet as a consumable item is required, there is a problem that extra running cost is required.
According to the latter of the conventional methods for manufacturing a stamp, a heating plate obtained by applying an ink containing carbon or the like to a PET film is interposed between a material sheet and a document sheet. Then, the manuscript sheet needs to be made into a liquid-absorbing opaque sheet, and it is necessary to infiltrate the non-volatile material to make it transparent or translucent, and there are many consumables for these, and the work becomes complicated. was there. In addition, since a hard volatile substance is permeated into a manuscript sheet to make it transparent or translucent, restrictions such as the ability to apply ink that draws an imprinted manuscript image on the manuscript sheet to a material that does not bleed due to the hard volatile material can be applied. was there. Further, since the hardly volatile substance is infiltrated, the original sheet cannot be restored to the original state, and there is a problem that the original sheet cannot be diverted to other uses.
[0007]
The present invention has been made in order to solve these problems of the prior art, and is a stamp that can reduce the number of consumables, leave the original sheet in its original state, and simplify the plate-making operation. The object is to provide a plate making method.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the method for making a stamp according to the first aspect of the present invention includes a porous material which contains carbon black or a light energy attractive substance in a dispersed manner and has open cells and can be impregnated with the stamp ink. A transparent sheet having a melting temperature higher than the melting temperature of the stamp substrate is interposed between the surface of the stamp substrate made of an adhesive sheet and a light-transmitting original sheet having a desired image line portion, and the three members are stacked. In the pressed state, light is irradiated from the manuscript sheet side to melt and solidify portions other than the image area on the surface of the stamp substrate, and then remove the transparent sheet and manuscript sheet from the surface of the stamp substrate. It is characterized by making it.
[0009]
The invention described in claim 2 uses a transparent sheet made of polyethylene terephthalate resin having a high melting point in the method for making a stamp according to claim 1.
According to a third aspect of the present invention, in the stamp manufacturing method according to the second aspect, a transparent sheet having a surface subjected to sandblasting is used.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment embodying 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 the postcard or the like using the made stamp, and FIG. 2 shows the movable lid opened. It is a schematic sectional side view of the stamp unit in a state.
[0011]
1 and 2, the stamp unit 1 basically includes a plate making unit 2 (upper side of the stamp unit 1) and a printing unit 3 (lower side of the stamp unit 1). It is configured to be separable. That is, by engaging / disengaging the side upper edge of the bottomed case 7 of the printing unit 3 with the lock claws 5 with the urging springs 6 provided at the lower portions on both sides of the case 4 of the plate making unit 2, The case 4 can be stacked and integrated, or the bottomed case 7 can be separated from the case 4 and the article on the bottomed case 7 can be taken out and printed as described later.
[0012]
First, the configuration of the plate-making part 2 will be described. A concave part 13 having a substantially rectangular shape in plan view is formed in the upper part of the case 4 through a step part 12 having four rounds in plan view, and a flash valve 15 is provided in the bottom wall 13a. A socket hole portion 14 that can be detachably attached is provided, and a contact member 16 is disposed on the lower surface side of the socket hole portion 14. A sheet (not shown) having excellent light reflection characteristics such as aluminum foil is attached to the surface of the recess 13. A transparent plate 17 such as a transparent acrylic plate is detachably mounted on the stepped portion 12.
[0013]
On the left and right sides of the upper portion of the case 4, an outer lid 8, an intermediate lid 9, and an inner lid 10, which are movable lids, are pivotally mounted via pivotal pins 18, 19, 20, respectively. A flat plate pressing member 27 such as a sponge or rubber for pressing a stamp substrate 25, a transparent sheet 22 and a light transmissive original sheet 26, which will be described later, on the lower surface of the transparent plate 17 and pressing the upper surface of the transparent plate 17 with equal pressure. Is attached. When the intermediate lid 9 is disposed on the upper surface of the inner lid 10, a pressing bulging portion 28 for uniformly pressing the upper surface of the inner lid 10 at a plurality of locations is integrally formed. In addition, a handle 29 is provided on the outer surface of the outer lid 8, and a hook 31 for engaging with and disengaging from the engagement portion 30 such as a hole shape of the case 4 is provided on the free end side of the outer surface of the outer lid 8. It is mounted so as to be urged in the engagement direction via. Further, the outer lid 8 is formed with at least two pressing bulging portions 33 for pressing the intermediate lid 9 substantially evenly when the outer lid 8 is stacked on the upper surface of the intermediate lid 9.
[0014]
The engaging portion 30 is provided with a switch portion (not shown). A new flash bulb 15 is mounted in the socket hole portion 14, the transparent plate 17 is fitted into the step portion 12, and the original is placed on the transparent plate 17. A transparent sheet 22 (to be described later) and a stamp substrate 25 are stacked on the sheet 26, and then the inner lid 10, the intermediate lid 9 and the outer lid 8 are sequentially stacked, and an operator applies a predetermined pressing force to engage the hook 31. When the switch 30 is locked, the switch unit is turned on and the flash bulb 15 can be flashed.
[0015]
Next, the structure of the stamp substrate 25 of the present invention and the plate making method using the same will be described in detail. The stamp substrate 25 contains carbon black or a light energy attractive substance dispersed in a porous material that has open cells and can be impregnated with stamp ink. The basic material is a polyolefin-based material. It is preferably a foamed resin material such as a resin, a polyvinyl chloride resin, and a polyurethane resin, and has flexibility (softness) when formed on a porous sheet. Therefore, as shown in FIG. 3A, open-cell pores are exposed over the entire surface of at least the wide surface 25a of the stamp substrate 25 before plate making.
[0016]
It is also possible to use rubber materials. The thickness of the stamp substrate 25 is about 1 mm to 5 mm. Thus, by containing carbon black or a light energy attractive substance, when the surface side of this type of stamp substrate 25 is heated, the pores exposed to the surface are melted and closed. . Then, after the surface side of the stamp substrate 25 is melted in the compressed state, the pores that are solidified and exposed on the surface are blocked, become ink non-exuded portions, and the portions that did not dissolve are the inks whose pores are exposed on the surface It becomes an exudation part.
[0017]
In the Examples, the weight ratio of the carbon black or the light energy attractive substance contained is 1.0% by weight to 1.5% by weight with respect to the polyurethane-based foamed resin. In addition, the content rate of carbon black is not limited to this, What is necessary is just the range of 0.1 weight%-15 weight%. If the carbon black content is greater than 15% by weight, the stamp substrate 25 itself will be black, and it will not be possible to know how many colors the stamp ink has been applied. If the amount is less than 0.1% by weight, sufficient heat generation cannot be obtained, and the surface of the stamp substrate 25 cannot be melted.
[0018]
Examples of the light energy attractive substance include silver chloride and silver bromide.
When using the plate making unit 2 as a stamp plate making method, a black sheet, a white sheet, a gold sheet, a silver sheet, or the like is previously formed on the surface of a light transmissive sheet such as a PPC sheet (tracing document sheet) as the document sheet 26. The non-light-transmissive image line portion 21 is drawn with light-opaque ink, oil-based marker, paint, paint, or the like of any color.
[0019]
Then, the original sheet 26 is placed on the transparent plate so that the image line portion 21 faces up or a mirror image of the image line portion 21 is formed on the wide surface (wide bottom surface) 25a of the stamp substrate 25. 17 is placed on the surface of the original sheet 26, and then the three sheets are placed with the transparent sheet 22 interposed between the surface of the original sheet 26 and the wide lower surface 25a of the stamp substrate 25 (FIG. 3B). )reference). The inner lid 10, the intermediate lid 9, and the outer lid 8 are sequentially stacked and pressed on the upper surface of the stamp substrate 25, and the flash bulb 15 is flashed from the lower surface side of the transparent plate 17 (see FIG. 3C). This irradiation light contains an infrared component. Instead of the flash bulb 15, a rechargeable strobe lamp for photography or the like may be used.
[0020]
The transparent sheet 22 has a property of melting at a temperature higher than the melting point of the stamp substrate 25 (about 120 ° C. for a soft polyurethane resin and about 70 ° C. for a soft polyolefin resin). As an example, a transparent PET (polyethylene terephthalate) resin film having a high melting point (about 230 ° C.) is preferable, and the thickness of the transparent sheet 22 is about 0.025 mm to 0.2 mm.
[0021]
In this way, the light energy that has passed through the portion other than the image line portion 21 (non-image line portion) in the original sheet 26 passes through the transparent sheet 22 as it is, and the image line portion in the stamp substrate 25 by the light energy. The carbon black in the vicinity of the surface (light irradiation side surface) corresponding to a portion other than 21 (non-imaged portion) absorbs heat and corresponds to a portion other than the imaged region 21 (non-imaged portion) in the stamp substrate 25. When the surface portion is heated and melted and then solidified, the pores on the surface are closed, and an ink non-exuded portion 23a having a predetermined thickness is formed (see FIG. 3D).
[0022]
On the other hand, when the image line portion 21 is black including carbon black, the image line portion 21 is heated by the light energy irradiated from the direction of the transparent plate 17 and the temperature rises. The transparent sheet 22 corresponding to the line portion 21 conducts heat in the lateral direction within the thickness of the sheet. In other words, the heat generated on the original sheet 26 side is absorbed and dispersed by the transparent sheet 22, and the surface portion of the stamp substrate 25 corresponding to the image line portion 21 is not heated, and is in accordance with the shape of the image line portion 21. The pores are exposed to the ink exuding portion 24. When the image line portion 21 is other than black, the light energy is blocked and reflected by the image line portion 21, and the surface portion of the stamp substrate 25 corresponding to the image line portion 21 is not heated, and the pores are exposed. The ink exuding portion 24 is obtained.
[0023]
Therefore, when the transparent sheet 22 and the original sheet 26 are removed from the wide surface 25a of the stamp substrate 25 after the light irradiation, the image line portion 21 in the original sheet 26 is obtained as shown in FIGS. The ink exudation portion 24 is formed with the pores in the shape of the mirror image exposed, and the non-exudation portion 23a corresponding to the non-image portion remains on the wide surface 25a of the stamp substrate 25 and has a predetermined marking surface. Plate making can be performed as the stamp 40.
[0024]
The surface of the transparent sheet 22, preferably the side in contact with the wide surface of the stamp substrate 25, is subjected to sand blasting, fine embossing, or embossing, so that the transparent sheet 22 and the stamp substrate 25 are formed. A thin heat insulating air layer is formed between the wide surface 25a and the heat generated in the image line portion 21 of the original sheet is efficiently absorbed and dispersed by the transparent sheet 22 and transmitted to the surface of the stamp substrate 25. As a result, the pores in the shape of the mirror image of the image line portion 21 remain exposed, and the imprinted edge of the ink exuding portion 24 becomes clear.
[0025]
As described above, when the melting temperature of the transparent sheet 22 is high, the surface of the transparent sheet 22 is not melted by the light energy passing through the document sheet 26. Since the ink is not adhered to the ink or the like of the image line portion 21, the plate making is good and the original sheet 26 can be separated as it is and used as an original any number of times, and can be used for other purposes. .
[0026]
As described above, the stamp substrate to be used in the stamp plate-making method has an open cell and a porous sheet that can be impregnated with stamp ink, 0.1 to 15% by weight of carbon black or light energy attractive substance When dispersed and contained, the optical energy step that can be absorbed by the contained carbon black can be increased, and the contour of the image line portion when the plate is made can be clearly obtained.
[0027]
Furthermore, if the porous sheet in this stamp substrate is made of a polyurethane resin material, the penetrability and holding property of the stamp ink is improved, and it is possible to make it suitable for printing a large number of stamps. is there.
Next, the configuration of the printing unit 3 will be described. The bottom surface 7 of the bottomed case 7 removed from the case 4 is placed with the image line portion (printing surface) of the preprinted stamp 40 facing downward on the upper support 34, etc. When a double-sided adhesive tape (not shown) is attached to both ends on the opposite side, and then the pressure roller 37 taken out from the pressure roller placement portion on one side of the bottomed case 7 is rolled and moved, the pressure roller 37 The back surface of the stamp 40 is wound around and fixed to the peripheral surface. Next, ink of a predetermined color is sucked into the ink exuding portion 24 corresponding to the image line portion of the stamp 40, and the ink adhering to the non-exuding portion 23a is wiped off. When a sheet (not shown) is placed and rolled while pressing the pressing roller 37 with a handle, printing on the sheet can be completed. Needless to say, a different color stamp ink is sucked into another portion of the ink bleed portion 24 to obtain a multicolor stamp.
[0028]
【The invention's effect】
According to the plate making method of the invention described in claim 1, a stamp substrate comprising a porous sheet containing carbon black or a light energy attractive substance dispersed therein and having open cells and capable of being impregnated with stamp ink. A transparent sheet having a melting temperature higher than the melting temperature of the stamp substrate is interposed between the surface of the sheet and a light-transmitting document sheet having a desired image line portion, and the document is pressed in a state where these three members are pressed together. By irradiating light from the sheet side, portions other than the image line portion on the surface of the stamp substrate are melted and solidified, and then the transparent sheet and the original sheet are removed from the surface of the stamp substrate. As a result, in the portion corresponding to the image line portion, the heat generated in the image line portion is dissipated through the transparent sheet, or the light energy is blocked by the image line portion. On the other hand, in a portion corresponding to a portion other than the image portion (non-image portion), the irradiated light energy passes through the original sheet and the transparent sheet as it is and light such as carbon black in the vicinity of the surface of the stamp substrate. The area is heated with an energy attractive substance to form a non-extruded portion of the stamp ink that does not allow the stamp ink to permeate.
[0029]
In this case, since a transparent sheet having a high melting point is interposed between the stamp substrate and the original sheet, the transparent sheet and the original sheet are separated from each other without being fused to the surface of the stamp substrate after plate making. Since it can be used and can withstand many uses, the running cost can be reduced.
Further, the ink or the like forming the image line portion of the original sheet may be light non-transmissive, and there is an effect that various originals can be used as they are.
[0030]
Since the invention according to claim 2 uses a transparent sheet made of polyethylene terephthalate resin having a high melting point in the stamp making method according to claim 1, it is low in cost, transparency and for stamping. The non-adhesion performance with the substrate is improved, and the durability that can withstand many uses is excellent, and the running cost of plate making can be greatly reduced.
[0031]
According to a third aspect of the present invention, in the stamp manufacturing method according to the second aspect, a transparent sheet having a surface subjected to sandblasting is used.
In this way, if the surface of the transparent sheet is roughened, the adhesion with the surface of the stamp substrate is poor, and an air layer as a poor heat conductor is formed between both sheets, and the image area and the non-image area It is possible to clearly define the boundary between the stamp ink and the difference between the stamp ink exuding portion and the stamp ink non-exuding portion.
[Brief description of the drawings]
FIG. 1 is a schematic sectional side view showing a stamp unit.
FIG. 2 is a schematic sectional side view showing a stamp unit in a state where a movable lid is opened.
3A is a perspective view of a stamp substrate before plate making, FIG. 3B is a cross-sectional view showing the order of stacking of base materials in plate making work, FIG. 3C is a cross-sectional view during light irradiation, and FIG. ) Is a cross-sectional view of the stamp in the state of plate making.
FIG. 4 is a perspective view of a stamp in a plate-finished state.
[Explanation of symbols]
17 Transparent plate 21 Image area 22 Transparent sheet 23a Ink non-exudation section 24 Ink exudation section 25 Stamp substrate 26 Original sheet

Claims (3)

A light transmitting material having a desired image line portion and a surface of a stamp substrate comprising a porous sheet containing carbon black or a light energy absorptive material dispersed therein and having open cells and capable of being impregnated with stamp ink A transparent sheet having a melting temperature higher than the melting temperature of the stamp substrate is interposed between the original sheet and the surface of the stamp substrate by irradiating light from the original sheet side in a state where the three members are stacked and pressed. A method for making a stamp, wherein a portion other than the image line portion is melted and solidified, and then the transparent sheet and the original sheet are removed from the surface of the stamp substrate. The method for making a stamp according to claim 1, wherein a transparent sheet made of polyethylene terephthalate resin having a high melting point is used. The method for producing a stamp according to claim 2, wherein a transparent sheet having a surface subjected to sandblasting is used.

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