JPH10146947A - Plate-making device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give sufficient energy to a transferring sheet or a heating plate even in a low room temperature environment by the steps of arranging a flash light source at the position opposite to a manuscript sheet by holding a transparent plate, disposing a temperature sensor in the main body of the device, setting the number of flash in accordance with the detected value, and carrying out flashing operation. SOLUTION: A reflector 14 having a recess 13 is provided on the bottom of a transparent plate 11 on the upper surface of a case 4, and a flash light source 16 is detachably mounted thereon. In the case 4, a CPU 45 is set for controlling operation of the flash light source 16, and an electric circuit or the like is connected to the exterior surface, etc., of the reflector 14 for supplying electric power to the temperature sensor 48, operation switch, and flash light body 16. As such, in accordance with the detected value of the temperature sensor 48, flash is used only once at a high temperature in the case, and at the event of somewhat lower temperature, flash is used only twice, and in situations where the temperature is still lower, flash is used three times, thereby heating air and other parts in the case 4 and transparent plate 11, and the manuscript sheet and stamping base plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cell having an open cell,
By superimposing a porous sheet that can be impregnated with stamp ink and a light-transmissive original sheet having a desired image portion, and irradiating light from the original sheet side, ink oozes out to the image portion on the surface of the porous sheet. The present invention relates to a structure of a plate making apparatus for forming a portion and a non-ink bleeding portion for a non-image portion.

[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 composed of an ink exuding portion which becomes a mirror image of a desired imprint original and an ink non-exuding portion which closes the continuous bubbles is formed on the surface of a sheet having open cells and impregnated with stamp ink. A method of manufacturing a multicolor stamp has been proposed in which a printing plate is used, a plurality of colors of ink are directly sucked into an 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 thermal transfer sheet is superimposed on the surface of a material sheet (porous sheet) which 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, and the material sheet is compressed. By irradiating infrared rays from above the original sheet in this state, 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 a non-ink bleed portion, and the non-transfer portion becomes a bleed ink It is disclosed to have a stamped surface as a part.

[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 However, the heating plate corresponding to the 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 does not melt and forms an ink exuding portion. It is disclosed to have a stamped surface.

In these plate making methods, an original sheet is placed on a support plate such as an acrylic transparent plate on the light irradiation side, and then a thermal transfer sheet or a heating plate is stacked thereon.
Further, a porous sheet is superimposed on the porous sheet, and a pressing force is applied to a portion above the porous sheet so that a flash is emitted from the support plate side.

[0006]

However, when light is irradiated only once in an environment where the room temperature is low, such as in winter, a considerable portion of the irradiated light energy is heated by other members or air. Therefore, sufficient heat energy cannot be applied to the thermal transfer sheet or the heating plate, and as a result, heat generation at a portion corresponding to a portion other than the imprint original image on the surface of the porous sheet does not occur. Thus, there is a problem that the surface of the material sheet is incompletely melted, the boundary between the ink non-exuding portion and the ink exuding portion becomes unclear, platemaking is poor, and the porous sheet is wasted.

[0007] Further, in the one-time flash operation by the flash valve of the prior art, the light energy to be irradiated becomes uneven due to the variation of the charge capacity and the discharge time thereof, and the plate making result also becomes uneven. There has been a problem that a good plate making cannot be reliably formed. The present invention has been made to solve these problems of the prior art,
An object of the present invention is to provide a plate making apparatus capable of reliably performing good plate making.

[0008]

According to a first aspect of the present invention, there is provided a plate making apparatus comprising: a stamp substrate comprising a porous sheet having continuous cells and impregnated with stamp ink; By irradiating light from the transparent plate side in a state where a light-transmissive original sheet having a desired image portion and a transparent sheet are overlapped on the transparent plate and pressed, an ink bleeding portion with respect to the image portion on the surface of the stamp substrate. And a stamp plate making device for forming an ink non-exuding portion with respect to a non-image area, a flash light source is arranged at a position opposite to the original sheet with a transparent plate interposed therebetween, while the device main body is A temperature sensor is provided, and control means is provided for controlling the execution of the flash operation by setting the number of flashes of the flash light source body in accordance with the detection value of the temperature sensor.

The invention described in claim 2 is the first invention.
2. The plate making apparatus according to claim 1, wherein the control means controls the flash light source to execute a flash at predetermined time intervals. According to a third aspect of the present invention, in the plate making apparatus according to the first or second aspect, the flash light source is disposed between a portion surrounded by the concave reflector and the transparent plate. Is what it is.

[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 locking claw 5 with the biasing spring provided on the lower side of both sides of the case 4 of the plate making section 2 is disengaged from the upper edge of the side of the bottomed case 7 of the printing section 3 by the locking claw 5.
The case 4 can be stacked on top of the case 4 so as to be integrated, or the bottomed case 7 can be separated from the case 4 to take out the articles on the bottomed case 7 and print it as described later.

First, the configuration of the plate making section 2 will be described. A transparent plate 11 such as a transparent acrylic plate or the like, which is substantially rectangular in plan view, is removably mounted on the upper part of the case 4 on a step portion 12 having four rounds in plan view. I have. Below this transparent plate 11,
A reflector 14 having a recess 13 having a substantially rectangular shape in a plan view is provided via the step portion 12. The inner surface of this reflector 14
It is formed of a member having excellent light reflection characteristics. A flash light source body 16 is detachably mounted in the recess 13 through a pair of brackets 15 and sockets projecting upward from the inner surface of the reflector 14.

Preferably, the flash light source body 16 is arranged so that its axis extends along the longitudinal direction of the stamp substrate 25 described later, and is located substantially at the center of the stamp substrate 25 in the width direction. A xenon lamp or a halogen lamp is usually used for the flash light source body 16. On the other hand, on the right and left sides of the upper part of the case 4, an outer lid 8, an intermediate lid 9, and an inner lid 10, which are movable lids, are pivotally mounted.
It is pivotally attached to open and close freely via 9, 20 respectively.
On the lower surface of the inner lid 10, a stamp substrate 25 described later,
A flat pressing member 27 such as a sponge or rubber for pressing the transparent sheet 22 and the light transmissive document sheet 26 on the upper surface of the transparent plate 11 with uniform pressure is adhered.
When the intermediate lid 9 is disposed on the upper surface of the inner lid 10, a press bulging portion 28 for uniformly pressing the upper surface of the inner lid 10 at a plurality of locations is formed integrally. A handle 29 is provided on the outer surface of the outer cover 8, and a hook 31 for engaging and disengaging with a hole-shaped engaging portion 30 of the case 4 is provided on a free end side of the outer surface of the outer cover 8. It is mounted so as to be urged in the engagement direction via the. Further, the outer lid 8 is formed with at least two pressing bulges 33 for pressing the intermediate lid 9 substantially uniformly when the outer lid 8 is overlaid on the upper surface of the intermediate lid 9.

In the case 4, as shown in FIG. 3, a CPU which is a microcomputer-type control device as control means for controlling the operation of the flash light source body 16 is provided.
A ROM (read only memory) 46 storing a control program and a RAM (randomly readable and writable memory) 47 for temporarily storing various data are provided.
And a temperature sensor 48 attached to the outer surface of the reflector 14 or the like.
And an operation switch 49 for starting a plate making operation, a power supply circuit 50 for supplying electric power to the flash light source body 16, and the like.

Note that, instead of the microcomputer-type control device, a control device having a combination of predetermined electric circuits may be used. 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 of the first embodiment has open cells and contains carbon black or a light energy-absorbing substance dispersed in a porous material that can be impregnated with stamp ink. The material is a foamed resin material such as a polyolefin-based resin, a polyvinyl chloride-based resin, and a polyurethane-based resin, and preferably has flexibility (softness) when formed into a porous sheet. Therefore, open pores are exposed over the entire surface of at least the wide surface 25a of the stamp substrate 25 before plate making (see FIG. 4A).

It is also possible to use a rubber-based material. The thickness of the stamp substrate 25 is about 1 mm to 5 mm. As described above, when the surface side of the stamp substrate 25 of this type is irradiated with light, it is heated and melted to close the pores exposed on the surface by containing the carbon black or the light energy attracting substance. It will have properties. Then, in the compressed state, the stamp substrate 25
After the surface side is melted, the pores that are solidified and exposed on the surface are closed and become ink non-exuding portions, and the undissolved portions become ink exuding portions 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. At the time of plate making, PPC paper (manuscript paper for tracing) is used as the manuscript sheet 26 in advance.
Draw a light-impermeable image portion 21 on the surface of a light-transmissive paper such as black, white, gold, silver or the like with light-opaque ink, oily marker, paint, paint, or the like. .

On the other hand, a transparent sheet 22 to be interposed between the original sheet 26 and the wide lower surface 25a of the stamp substrate 25 is prepared. The transparent sheet 22 has a melting point of the stamp substrate 25 (about 7 in the case of a soft polyurethane resin).
(0 ° C., about 120 ° C. in the case of a soft polyolefin-based resin). As an example, transparent PE having a high melting point (about 230 ° C.)
T (polyethylene terephthalate) resin film is preferable, and the thickness of each sheet is about 0.025 mm to 0.2 mm.

Next, the original sheet 26 is placed on the transparent plate 11 so that the image area 21 faces upward, and then the transparent sheet 22 is overlaid. The layers are stacked such that the exposed side faces downward (see FIG. 4B). Further, when the inner lid 10, the intermediate lid 9, and the outer lid 8 are sequentially stacked and the operator applies a predetermined pressing force to lock the hook 31 to the engaging portion 30, the operation switch provided on the engaging portion 30 is provided. When 49 is turned on, the flash light source body 16 is flashed a predetermined number of times at appropriate time intervals.

In the present embodiment, according to the detection value of the temperature sensor 48, if the temperature in the case 4 is high, only one flash is performed, and if the temperature is slightly lower than room temperature, two flashes are performed. When the temperature is lower, it is assumed that the flash 46 is programmed in advance in the ROM 46 so as to flash three times. If the prepress operation is continuously performed, the temperature in the case 4 rises.
So that the next flash will be only once,
It is assumed that the required number of flashes is determined separately from the plate making operation (by the ON operation of the operation switch 49).

When this type of flash light source 16 is operated, the power supply circuit 50 generally has a capacitor in many cases, and the time required for charging after one flash operation (2 seconds to 2 seconds). Flash operation within 3 seconds) is not performed. When the flash light source body 16 is an incandescent lamp system such as a halogen lamp, the pause interval of the flash operation can be shortened.

As described above, when the number of flashing operations is increased or decreased according to the environmental temperature of the plate-making apparatus, if the environmental temperature is low, the air or other components in the case 4 and the other components as well as the first one or more flashes are used. The transparent plate 11, the document sheet 26, and the stamp substrate 25 can be heated to some extent. In the subsequent flash operation, a plate-making operation described later can be reliably performed. That is, light energy that has passed through a portion (non-image portion) other than the image portion 21 on the document sheet 26 passes through the transparent sheet 22 as it is (see FIG. 4C),
Due to the light energy, carbon black near the surface (light irradiation side surface) corresponding to a portion other than the image area 21 (non-image area) on the stamp substrate 25 absorbs heat, and the image area on the stamp substrate 25 is absorbed. The surface portion corresponding to a portion (non-image portion) other than the portion 21 is heated and melted, and then solidified, whereby pores on the surface are closed, and an ink non-exuding portion 23a having a predetermined thickness is formed (FIG. 4). (D) and FIG. 5).

On the other hand, the original sheet 26 is
When is black containing carbon, the image area 21 is heated by light energy irradiated from the transparent plate 11 direction,
Although the temperature rises, the transparent sheet 22 corresponding to the image area 21 conducts heat in a lateral direction or the like 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 area 21 is not heated, and the shape of the image area 21 is not heated. The ink bleeding part 24 with the pores exposed to
Becomes When the image portion 21 is other than black,
The light energy is cut off and reflected by the image portion 21, and the surface portion of the stamp substrate 25 corresponding to the image portion 21 is not heated and becomes the ink exudation portion 24 in which the pores are exposed.

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 on the original sheet 26 is removed as shown in FIGS. The ink bleeding portion 24 remains with the pores in the shape of the mirror image of the line portion 21 exposed,
The ink non-bleeding portion 23a corresponding to the non-image portion can be made as a stamp S having a predetermined stamped surface formed on the wide surface 25a of the stamp substrate 25.

If the number of flashes of the flash light source 16 is controlled to increase or decrease according to the magnitude of the pressing force on the stamp substrate 25, in other words, according to the degree of adhesion between the stamp substrate 25 and the document sheet 26, the stamp There is an effect that the performance of the stamp surface formed on the use substrate 25 can be made uniform over the whole. Preferably, the transparent sheet 22 is formed by sandblasting or finely embossing or embossing a surface of the transparent sheet 22 and the stamp substrate 25 that is in contact with the wide surface of the stamp substrate 25.
5, a thin heat-insulating air layer is formed, and the heat generated in the image area 21 of the original sheet is efficiently absorbed and dispersed by the transparent sheet 22 so as to be directed toward the surface of the stamp substrate 25. Since the light is not transmitted, the pores in the shape of the mirror image of the image portion 21 remain exposed, and the effect of imprinting the edge of the imprint of the ink exudation portion 24 is obtained.

The stamp substrate 25 and the original sheet 26
When the image portion 21 of the original sheet 26 is made of black ink without the transparent sheet 22 interposed therebetween, the image portion 21 is directly adhered to the surface of the porous stamp substrate 25 containing carbon black. When plate making is performed, the surface portion of the stamp substrate 25 facing the image portion 21 is also heated and melted, and then solidified. When the ink is exfoliated, the formed ink non-exuded portion comes into close contact with the image portion 21. Is peeled off, the non-ink bleeding portion is peeled off according to the shape of the image portion 21 to form the ink bleeding portion 24 as per the seal imprint.

In another embodiment, the stamp substrate 2
5 is a porous sheet which does not contain carbon black or a light energy-absorbing substance, has open cells, and can be impregnated with stamp ink, and is made of the same material as described above. In this case, as the heating sheet that comes into contact with the wide surface (the surface where the pores are exposed) of the stamp substrate 25, a black pigment such as carbon black is mixed in advance or printed on the surface. In this embodiment, in the main heating operation, light irradiated from the transparent plate 11 side passes through the original sheet 26, and at a portion corresponding to the non-image portion, the light is heated by the light energy absorbed by the black heating sheet, Since the surface of the stamping substrate 25 facing the surface is once melted and solidified by the heat, the stamping ink becomes an ink non-exuding portion 23a in which the ink does not exude, and at a portion corresponding to the image portion 21, the light does not transmit.
The ink bleeding portion 24 remains with the pores in the original sheet 26 in the shape of the mirror image of the image portion 21 exposed, and the non-ink bleeding portion 23a corresponding to the non-image portion forms the stamp substrate 2
5 can be made as a stamp S having a predetermined stamped surface which is formed on the wide surface 5 and is a mirror image of the image area 21.

Next, the configuration of the printing unit 3 will be described. On the support table 34 on the upper surface of the bottomed case 7 removed from the case 4, the image portion (seal surface) of the stamp S that has been made.
Is placed downward, and a double-sided adhesive tape (not shown) is attached to both ends of the back side (opposite side of the stamp face) of the prepressed stamp S, and then a pressing roller on one side of the bottomed case 7 When the pressing roller 35 taken out of the placing portion is rolled and moved, the back surface of the stamp S is wound around the peripheral surface of the pressing roller 35 and fixed. Next, ink of a predetermined color is sucked into the ink bleeding portion 24 corresponding to the image portion of the stamp S, and the ink attached to the ink non-bleeding portion 23a is wiped off. When a sheet (not shown) is placed and rolled while pressing the pressing roller 35 with the handle, printing on the sheet can be completed. 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.

By arranging the flash light source body 16 at a portion surrounded by the transparent plate 11 and the concave portion 13 of the reflector 14, air whose temperature is increased by the light energy given by the flash light of the flash light source body 16 is provided. Is confined in the recess 13 so as not to be scattered and efficiently radiated to the transparent plate 11 side, which can contribute to a rise in the temperature of the stamp substrate 25 and the like and plate making, so that the number of flashes is not increased, and This has the effect of producing a beautiful plate.

As another embodiment, even during a plurality of flash operations, detection is performed by the temperature sensor 48, and when the temperature reaches a predetermined value, the operation is performed even if a subsequent flash operation remains. It may be controlled to stop or reduce the number of times.

[0032]

According to the first aspect of the present invention, there is provided a plate making apparatus comprising: a stamping substrate formed of a porous sheet having continuous cells and impregnated with stamp ink; and a light transmitting plate having a desired image portion. By irradiating light from the transparent plate side while the original sheet and the transparent sheet are pressed against the transparent plate, an ink exuding portion for the image portion and an ink non-exuding portion for the non-image portion are formed on the surface of the stamp substrate. In the stamp plate making apparatus for forming a sheet, a flash light source body is arranged at a position opposite to the original sheet with the transparent plate interposed therebetween, while a temperature sensor is arranged inside the apparatus main body, and the detection of the temperature sensor is performed. There is provided control means for controlling the execution of the flash operation by setting the number of flashes of the flash light source according to the value.

Thus, even when the room temperature or the environmental temperature of the plate making apparatus is low, the first one or more flashes cause
The air and other components in the apparatus, as well as the transparent plate, the document sheet, and the stamp substrate can be warmed to some extent, and the subsequent flashing operation can reliably increase the temperature of the surface of the stamp substrate. As a result, the boundary between the ink exuding portion and the ink non-exuding portion formed on the surface can be made clear, and thus the effect that the performance of the stamp surface formed on the stamp substrate can be made uniform over the whole.

According to a second aspect of the present invention, in the plate making apparatus according to the first aspect, since the flash by the flash light source is controlled to be executed at predetermined time intervals, incomplete energy consumption is prevented. There is an effect that a reliable plate making operation can be performed by eliminating insufficient light irradiation. And
According to a third aspect of the present invention, in the plate making apparatus according to the first or second aspect, the flash light source body and the transparent plate are
Since the air is arranged at a portion surrounded by the concave reflector, the air whose temperature has been increased by the light energy given by the flash of the flash light source body is confined in the concave so as not to be dissipated, and the efficiency is improved. Irradiation is well performed on the transparent plate side, which can contribute to a rise in the temperature of the stamp substrate or the like and plate making. Therefore, there is an effect that a reliable and beautiful plate making can be performed without increasing the number of flashes.

[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. 3 is a functional block diagram of a control device.

4A is a perspective view of a stamp substrate, FIG. 4B is a cross-sectional view of a state in which a document sheet, a transparent sheet, and a stamp substrate are stacked, and FIG. 4C is a cross-sectional view showing a light irradiation state; ,
(D) is a sectional view of a state where the stamp substrate is separated from the transparent sheet.

FIG. 5 is a perspective view of a stamp in a plate making finished state.

[Explanation of symbols]

 4 Case 8 Outer lid 9 Intermediate lid 10 Inner lid 11 Transparent plate 13 Concave part 14 Reflector 15 Bracket 16 Flash light source 21 Image area 22 Transparent sheet 23a Ink non-exuding part 24 Ink exuding part 25 Stamp substrate 26 Document sheet 45 CPU 48 Temperature sensor 50 Power supply circuit

Claims (3)

[Claims] 1. A state in which a stamp substrate made of a porous sheet having open cells which can be impregnated with stamp ink and a light-transmitting original sheet having a desired image portion are overlaid on a transparent plate and pressed. By irradiating light from the transparent plate side, the stamp plate making apparatus for forming an ink exuding portion for the image portion and an ink non-exuding portion for the non-image portion on the surface of the stamp substrate, A flash light source body is arranged at a position opposite to the original sheet with respect to the original sheet, and a temperature sensor is arranged inside the apparatus main body, and the number of flashes of the flash light source body is determined in accordance with a detection value of the temperature sensor. A plate-making apparatus comprising: a control unit configured to perform a setting and execute a flash operation. 2. The plate making apparatus according to claim 1, wherein the control unit controls the flash light source to execute a flash at predetermined time intervals. 3. The plate making apparatus according to claim 1, wherein the flash light source is disposed between a portion surrounded by a concave reflector and a transparent plate.