JPH08281908A - Pad press - Google Patents

Abstract

PURPOSE: To prevent inks of many colors from leaking and mixing although multicolor printing is enabled with the use of only one ink container. CONSTITUTION: An ink container 6 is provided with a container main body 30 separated to a plurality of chambers 33a, 33b by a partition wall 32 extending in a moving direction of a printing plate 5, and a doctor blade 40 having a ring-shaped blade part 41 facing a peripheral wall 31 of the main body 30 and a partition blade part 42 facing the partition wall 32. A plate-like packing 50 is interposed between a lower end face of the container main body 30 and an upper end face of the doctor blade 40. The packing 50 has a ring-shaped sealing part 51 which is in face contact with a lower end face of the peripheral wall of the main body 30 and an upper end face of the ring-shaped blade part 41, and a partition sealing part which is continuous with the ring-shaped sealing part and in face contact with a lower end face of the partition wall of the main body 30 and an upper end face of the partition blade part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad printing machine of the type which applies ink to a printing plate using an ink container.

[0002]

2. Description of the Related Art Conventionally, as this type of pad printing machine, for example, as shown in FIG. 12, an ink container C in which a ring-shaped doctor blade B is fitted to the lower end of a container body A for storing ink is used. A printing plate D in which the ink in the ink container C is applied to a printing pattern by moving forward and backward in contact with the lower end of the ink container C, and a transfer in which the ink applied to the printing pattern is copied and transferred to a printing object. And a pad (not shown), and the printing plate D
To move the ink back and forth to apply ink to the print pattern, then press the transfer pad having elasticity onto the printing plate D to copy the above print pattern onto the transfer surface, and then press the transfer pad onto the printing object to print. Is designed to do.

When the ring-shaped doctor blade B is fitted to the lower end of the container body A, ink is prevented from leaking from the container body A to the outside at the fitted portion. Fitting groove E formed at the lower end
Two O-rings F and G which are in pressure contact with the inner and outer peripheral surfaces of the doctor blade are provided therein for sealing.

[0004]

By the way, in the so-called ink pot type using the above-mentioned ink container A, as compared with the ink tray type, a solvent having a volatile property such as thinner contained in the ink is used. Evaporation is suppressed, the environment of the workplace can be prevented from deteriorating, and it has the excellent effect that transfer printing without uneven printing can be performed while keeping the viscosity of the ink constant, but there was only one color printing. .

Therefore, when an attempt is made to perform multicolor, for example, two-color printing using an ink container, the partition wall in the same direction as the moving direction of the printing plate is attached to the container body of the ink container and the ring-shaped doctor blade. And ink containers divided into two chambers by these partition walls are formed, the two color inks stored in the chambers of the container body are applied to the printing pattern by moving the printing plate forward and backward, It is conceivable that two-color printing is performed by copying the two-color ink applied to the printing plate with a transfer pad and transferring it onto a printing material.

However, when two-color printing is performed using the ink container as described above, the doctor blade for scratching the ink is used in a single-color pad printing machine because of the structure in which the partition blade portion is provided in the center of the ring-shaped blade portion. Of the O-rings F and G that seal the inner and outer peripheral surfaces of the ring-shaped doctor blade, the O-ring G provided on the inner peripheral surface side cannot be used. Therefore, the sealing property at the abutting portion of the lower end surface of the container body and the upper end surface of the doctor blade, that is, the sealing property of the partition portion between the one chamber and the other chamber becomes poor, and thereby from one chamber to the other chamber. There is a problem that the ink easily leaks and two colors of ink mix, and as a result, the above problems must be solved in order to perform multicolor printing using the ink container. It was

Therefore, according to the present invention, it is possible to surely prevent the ink from leaking from one chamber to another chamber and being mixed with the multicolor ink, while the multicolor printing can be performed by using one ink container. The challenge is to provide a pad printing machine.

[0008]

That is, the invention according to claim 1 of the present invention (hereinafter referred to as the first invention) is an ink container having an open lower end, and an ink container that moves in contact with the lower end of the ink container. In a pad printing machine comprising a printing plate on which the ink in the ink container is applied to a printing pattern by doing, and a transfer pad for transferring the ink applied to the printing pattern and transferring it to a printing object, the ink container Is a container main body partitioned into a plurality of chambers by at least one partition wall extending in the same direction as the moving direction of the printing plate, and a ring-shaped blade portion attached to the lower part of the container main body and facing the peripheral wall of the container main body. And a doctor blade having a linear partition blade portion facing the partition wall, and is interposed between the lower end surface of the container body and the upper end surface of the doctor blade, A ring-shaped seal portion that makes surface contact with the lower end surface of the peripheral wall of the container body and the upper end surface of the ring-shaped blade portion, and the partition wall lower end surface of the container body and the partition blade that are integrally connected from the ring-shaped seal portion. And a plate-like packing having a partition seal portion that makes surface contact with the upper end surface of the portion.

The invention according to claim 2 (hereinafter referred to as the second
(Referred to as an invention) is characterized in that the plate-like packing is made of a solvent-resistant resin having flexibility.

The invention according to claim 3 (hereinafter, referred to as the third
(Referred to as the invention) is characterized in that it is provided with a pressing means for pressing the lower end of the doctor blade against the printing plate through the plate-like packing by urging the container body toward the printing plate.

Further, in the invention according to claim 4 (hereinafter referred to as the fourth invention), an annular blade retainer having an inner peripheral surface allowing the insertion of the doctor blade is detachably provided at the lower portion of the container body. At the same time, a peripheral groove is formed on the inner peripheral surface of the blade retainer, and an O-ring is provided in the peripheral groove that is in pressure contact with the outer peripheral surface of the doctor blade.

[0012]

According to the above structure, the following effects can be obtained.

First, according to the first aspect of the invention, the printing plate is moved in contact with the lower end of the doctor blade to apply the multicolor inks stored in the plurality of chambers of the container body to the printing pattern, Press the transfer pad against the printing plate to copy the multicolored ink applied to the printing pattern on the transfer surface, and then press the transfer pad onto the printing object to transfer it, so that two-color printing is performed with one printing machine. It is possible to perform printing by printing once.

In this case, between the lower end surface of the container body and the upper end surface of the doctor blade, there is provided an annular seal portion which is in surface contact with the lower end surface of the peripheral wall of the container body and the upper end surface of the ring-shaped blade portion of the doctor blade. By interposing a plate-like packing having a partition wall lower end surface of the container main body and a partition seal portion that is in surface contact with the partition blade portion upper end surface of the doctor blade, which is integrally connected from the annular seal portion, a container is provided. It is possible to secure the sealing property at the abutting part of the lower end surface of the main body and the upper end surface of the doctor blade, that is, the sealing property of the partition part of each chamber, which allows ink to leak from one chamber to another. It is possible to reliably prevent mixing of multicolor inks.

According to the second aspect of the invention, since the plate-like packing is made of a flexible solvent-resistant resin, the plate-like packing is compressed by the lower end surface of the container body and the upper end surface of the doctor blade. By applying force, it is possible to deform this plate-like packing between the lower end surface of the container body and the upper end surface of the doctor blade, and make it adhere to the lower end surface of the container main body and the upper end surface of the doctor blade. As a result, the sealing effect of the plate-like packing can be exhibited more reliably.

According to the third aspect of the invention, the urging force of the pressurizing means to the printing plate side of the container body is applied to the doctor blade from the container body via the plate-like packing, and the doctor blade forms the printing plate. It comes into contact by being pressed with a predetermined pressure. As a result, the lower end opening of the doctor blade is satisfactorily sealed, and a compressing action is applied to the plate-like packing interposed between the container body and the doctor blade. It is possible to more reliably perform the sealing property in the abutting portion between the end surface and the upper end surface of the doctor blade.

Further, according to the fourth aspect of the present invention, a peripheral groove is formed on the inner peripheral surface of the annular blade retainer attached to the lower portion of the container body, and an O-ring is provided in the peripheral groove for press-contacting the outer peripheral surface of the doctor blade. Therefore, the O-ring can be pressed against the outer peripheral surface of the doctor blade with a predetermined pressure contact force without being affected by how the blade holder is attached to the container body. It becomes possible to reliably perform the sealing between the surface and the outer peripheral surface of the doctor blade.

[0018]

Embodiments of the present invention will now be described with reference to the drawings.

In the pad printing machine 1 shown in FIG. 1, the pad printing machine 1 is provided with a body frame 2 having a substantially inverted L shape, and a support shaft 3 is hung vertically in front of the body frame 2. A transfer pad 4 having elasticity is mounted on the lower end of the support shaft 3, and a printing plate 5 (see FIG. 2) is removably mounted at a transfer position immediately below the transfer pad 4. In that case, an ink container 6 is provided at a rear portion of the transfer position by means described later, and the printing plate 5 has a printing pattern of a predetermined design drawn on the upper surface thereof directly below the ink container 6 (hereinafter referred to as an ink application position). ) And the above-mentioned transfer position.

That is, in the pad printing machine 1 described above, the ink in the ink container 6 is applied to the printing pattern when the printing plate 5 is retracted to the ink application position shown by the solid line in FIG. As the printing plate 5 advances to the transfer position shown, the transfer pad 4 is lowered from the position P1 to the position P2 and pressed against the printing plate 5, whereby the ink applied to the printing pattern on the transfer pad 4 is Transferred according to the print pattern. After the transfer, the transfer pad 4 is slightly raised, and the printing plate 5 is retracted to the ink application position,
At the same time, the transfer pad 4 greatly descends to the position P3 and is pressed against the printing material (not shown) that has been carried into the printing position below the printing plate, thereby printing.

For this reason, a drive mechanism (not shown) for driving the transfer pad 4 and the printing plate 5 at the above timing is provided inside the main body frame 2 and a motor provided at the back of the main body frame 2 is provided. The rotational force of 7 (see FIG. 1) is taken out by an electromagnetic clutch (and brake) 8 and input to the drive mechanism via pulleys 9 and 10 and a timing belt 11.

The printing plate 5 mounted on the slider 12 is moved back and forth by the driving mechanism. In that case, as shown in FIGS. 3 and 4, a concave portion 13 is formed on the upper surface of the slider 12, the printing plate 5 is fitted into the concave portion 13, and the pressing members 14, which are overlapped on both sides of the printing plate 5, are formed. 1
By fixing 4 to the slider 12 with screws 15 and 15, the printing plate 5 is fixed and prevented from coming off. A pair of guide rails 17, 17 supported by support brackets 16, 16 are arranged on both sides of the slider 12, and a plurality of guide rollers 1 axially supported on both sides of the slider 12 are arranged on the guide rails 17.
The above-mentioned back-and-forth movement is made possible by fitting 8 and 18 together.

The above-mentioned ink container 6 is the pressure ring 1.
The ink is applied to the printing plate 5 while being held by the printing plate 9. Therefore, a pair of left and right support rods 20 and 20 are extended from the main body frame 2 to the mounting position of the ink container 6, and a pressure ring 19 is arranged between the tips of these support rods 20 and 20, and the ring 19 is It is swingably attached by ball joints 21 and 21. In that case, the center of swing of the pressure ring 19 connecting the left and right ball joints 21, 21 is the horizontal axis perpendicular to the moving direction of the printing plate 5 and the slider 12. Then, the pressure ring 19
The outer peripheral portion of the ink container 6 is fitted into the inner peripheral portion of the.

On the other hand, as shown in FIGS. 3 and 4, the ink container 6 has two chambers 3 with a cylindrical peripheral wall 31 having upper and lower openings and a partition wall 32 extending in the same direction as the moving direction of the printing plate 5.
A container body 30 partitioned into 3a and 33b, and a peripheral wall 3 of the container body 30 which is attached to a lower portion of the container body 30.
1, a doctor blade 40 having a ring-shaped blade portion 41 facing the lower end surface and a linear partition blade portion 42 facing the partition wall 32, a lower end surface of the container body 30 and an upper end surface of the doctor blade 40. Intervening between
Further, the ring-shaped seal portion 51 is in surface contact with the lower end surface of the peripheral wall of the container body 30 and the upper end surface of the ring-shaped blade portion 41.
A plate-like packing 50 having a partition seal part 52 that is integrally connected to the ring-shaped seal part 51 and is in surface contact with the lower end surface of the partition wall of the container body 30 and the upper end surface of the partition blade part 42; An annular blade retainer 60 is detachably attached to the lower portion of the container body 30 and has an inner peripheral surface that allows the doctor blade 40 to be fitted therein.

On the outer peripheral portion of the lower end surface of the peripheral wall 31 of the container body 30, as shown in FIGS. 6 and 7, the ring-shaped seal portion 51 of the plate packing 50 and the doctor blade 4 are provided.
Ring-shaped notch 3 into which the ring-shaped blade 41 of 0 fits
4a and a fitting portion 34 communicating with the cutout portion 34a and including a partition seal portion 52 of the plate-like packing 50 and a central communication groove 34b into which the partition blade portion 42 of the doctor blade 40 is fitted are formed. , The fitting portion 3
A flange portion 36 for attaching the blade pressing member is formed on the outer peripheral end of the blade 4 through a step portion 35. In addition, the peripheral wall 3 of the container body 30
A fitting concave portion 37 is formed by a notch on the inner peripheral portion of the upper surface side of 1, and a lid 72 is fitted into the fitting concave portion 37 via a lid seal 71 having through holes 71a, 71a. It is detachably screwed. As shown in FIG. 3, through holes 72a and 72a are formed in the lid 72, and transparent plastic plates 72b and 72b are fitted in the through holes 72a and 72a, and the plastic plates 72b and 72b. Also, the amount and color of ink in each chamber 33a, 33b can be confirmed through the through holes 71a, 71a. Further, a hand-held knob 74 for removing the lid 72 from the container body 30 when the ink is filled in the chambers 33a and 33b is provided. A positioning pin 38 for positioning the ink container 30 with respect to the pressure ring 16 is provided at a position above the brim portion 36 of the container body 30 so as to project outward.

The doctor blade 40 is made of ceramic and has a ring-shaped blade portion 41 as shown in FIGS.
And a linear partitioning blade portion 42 that divides the ring-shaped blade portion 41 in the center in the front-rear direction by integral molding. As a result, each chamber 33a of the container body 30,
A supply passage is formed which communicates with 33b and supplies the two color inks of the respective chambers 33a and 33b separately from the two openings 40a and 40b at the lower end of the doctor blade. The ring-shaped blade portion 41 and the partition blade portion 42 may be formed separately and adhered with an adhesive, or
It may be formed by integral molding. Further, the doctor blade 40 is not limited to the one made of ceramic, but may be made of, for example, a super hard material.

As the plate-like packing 50, a sheet material made of fibrous PTFE (ritetrafluoroethylene) resin, which has excellent solvent resistance against ink using an organic solvent and is plastically deformable, is used. . The plate-like packing 50 made of this sheet material enables close contact due to plastic deformation, has excellent sealing properties, and is low in cost. In addition,
As the plate-like packing 50, other than the solvent-resistant resin, for example, elastic fluorine rubber or the like may be used.

Further, as shown in FIGS. 4 and 5, the blade retainer 60 has a peripheral groove 61 formed in the intermediate portion of the inner peripheral surface thereof, and the O-ring is pressed against the outer peripheral surface of the doctor blade 40 in the peripheral groove 61. 62 is fitted. Then, after being fitted onto the outer peripheral surface of the step portion 35 of the container body 30,
A plurality of screws 63 are screwed onto the lower surface of the collar portion 36 of the container body 30.

Thus, when the doctor blade 40 is attached to the container body 30 described above, the upper end of the doctor blade 40 is further fitted with the plate-like packing 50 fitted in the groove-shaped fitting portion 34 of the container body 30. And the plate-like packing 50 is sandwiched between them, and then the blade retainer 60
The O-ring 62 is fitted in advance in the circumferential groove 61 of the doctor blade 40 and the container body 30.
The doctor blade 40 is fitted and held in a protruding state by being externally fitted to the outer peripheral surface of the stepped portion 35, and the blade retainer 60 is further attached to the lower surface of the flange portion 36 of the container body 30 by a plurality of screws 63 in that state. It is done by screwing.

On the other hand, a fitting groove 19a corresponding to the positioning pin 38 is formed in the lower portion of the inner peripheral surface of the pressure ring 19, and the positioning pin 38 is inserted into the fitting groove 19a to apply pressure. By fitting the ink container 6 into the ring 19, the partition blade portion 42 of the doctor blade 40 is set in a state of being oriented in the same direction as the moving direction of the printing plate 5. Also, the pressure ring 19
Is configured to be movable up and down together with the support rods 20 and 20 so that the ink container 6 can be attached to and detached from the pressure ring 19, and in the set state, the weight of the pressure ring 19 is equal to that of the ink. The doctor blade 40 is pressed against the printing plate 5 with a predetermined pressure from the container main body 30 via the plate-like packing 50 to come into contact with the container main body 30 of the container 6. As the pressurizing means for the container body 30, in addition to the pressurization by the weight of the pressurizing ring 19 as described above, for example, a spring, a cylinder or the like is used, and the support rod 20,
It is needless to say that the pressure ring 19 may be biased to the printing plate 5 side via 20 to thereby bias the container body 30 to the printing plate 5 side.

Thus, with the ink container 6 placed on the printing plate 5, by fitting the pressure ring 19 to the outer peripheral portion of the ink container 6 as described above, the above-mentioned ink application position. Is set to. Then, under the set state, the two chambers 33a and 33b of the container body 30 are filled with inks of two different colors such as red and black.

According to the above-mentioned structure, during the pad printing operation described with reference to FIG. 2, the slider 6 slides back and forth to contact the ink container 6 so that the printing plate 5 is in contact therewith.
Moves and the printing pattern drawn on the printing plate 5 reaches the ink application position, the chambers 33a, 3 in the container body are
The inks of two colors in 3b are applied to the print pattern respectively through the openings 40a and 40b formed at the lower end of the doctor blade 40, and then the printing plate 5 is moved in the reverse direction toward the transfer position to form the print pattern. The doctor blade 40 scrapes off excess ink from the printing plate surface when it comes out from just below the ink container 6. Therefore, the print pattern moves to the transfer position in a state where the two color inks are applied only to the print pattern. Then, the transfer pad 4 is pressed against the printing pattern of the printing plate 5, the two color inks applied to the printing pattern are transferred onto the transfer surface, and then the transfer pad 4 is pressed onto the printing object to transfer the ink. Therefore, it becomes possible to perform two-color printing with one printing machine using one printing machine.

In this case, between the lower end surface of the container body 30 and the upper end surface of the doctor blade 40, the peripheral wall lower end surface of the container body 30 and the upper end surface of the ring-shaped blade portion 41 of the doctor blade are in surface contact. A plate-like packing having an annular seal portion 51 and a partition seal portion 52 which is integrally connected to the annular seal portion 51 and is in surface contact with the lower end surface of the partition wall of the container body 30 and the upper end surface of the partition blade portion of the doctor blade 40. By interposing 50, the container body 30
It is possible to secure the sealing property at the abutting portion of the lower end surface of the doctor blade 40 and the upper end surface of the doctor blade 40, that is, the sealing property of the partition portion between the one chamber 33a and the other chamber 33b. It is possible to reliably prevent the ink from leaking into the chamber and mixing the two colors of ink.

In the set state, the pressure ring 19
Is applied to the container body 30 of the ink container 6, and the doctor blade 40 is pressed from the container body 30 through the plate-like packing 50 with a predetermined pressure to come into contact with the printing plate 5. As a result, the lower end opening 4 of the doctor blade 40
0a and 40b are well sealed. In that case, since the plate-like packing 50 is made of a plastic-deformable fibrous solvent-resistant resin, the plate-like packing 50 interposed between the container body 30 and the doctor blade 40 is compressed. When subjected to the action, it is plastically deformed between the lower end surface of the container body 30 and the upper end surface of the doctor blade 40 to adhere to the lower end surface of the container body 30 and the upper end surface of the doctor blade 40 while fitting. It is possible to more reliably exert the sealing effect of the plate packing.

A peripheral groove 61 is formed on the inner peripheral surface of the annular blade retainer 60 attached to the lower portion of the container body 30, and an O-ring 62 is provided in the peripheral groove 61 for contacting the outer peripheral surface of the doctor blade 40. Therefore, the O-ring 62 can be brought into pressure contact with the outer peripheral surface of the doctor blade 40 with a predetermined pressure contact force without being affected by the degree of attachment of the blade presser 60 to the container body 30. It is possible to reliably perform sealing between the inner peripheral surface of 60 and the outer peripheral surface of the doctor blade 40.

In the above embodiments, the present invention is applied to the case of two-color printing, but the present invention is not limited to two-color printing, and it is of course applicable to multi-color printing of three colors or more. is there. In that case, while forming a plurality of chambers in the container body by a plurality of parallel partition walls extending in the moving direction of the printing plate, the doctor blade and the plate-like packing a partition blade part and a partition seal part corresponding to each partition wall. They may be integrally formed.

[0037]

As described above, according to the first aspect of the present invention, the ink container faces the container body partitioned into a plurality of chambers by the partition wall extending in the moving direction of the printing plate, and the peripheral wall of the container body. A doctor blade having a ring-shaped blade portion and a partition blade portion facing the partition wall is provided,
Between the lower end surface of the container main body and the upper end surface of the doctor blade, a ring-shaped seal portion that makes surface contact with the lower end surface of the peripheral wall of the container main body and the upper end surface of the ring-shaped blade portion, and the ring-shaped seal portion are integrally connected. Since a plate-like packing having a partition seal part that comes into surface contact with the lower end surface of the partition wall of the container body and the upper end surface of the partition blade part is interposed, the printing plate can be moved while being in contact with the lower end of the doctor blade. After applying the multicolor ink stored in a plurality of chambers in the container body to the printing pattern, then press the transfer pad against the printing plate to copy the multicolor ink applied to the printing pattern onto the transfer surface. By pressing and transferring the transfer pad onto the material to be printed, it is possible to perform two-color printing in one printing by one printing machine.

Further, between the lower end surface of the container body and the upper end surface of the doctor blade, there is provided an annular seal portion which makes surface contact with the lower end surface of the peripheral wall of the container body and the upper end surface of the ring-shaped blade portion of the doctor blade. By interposing a plate-like packing having a partition wall lower end surface of the container main body and a partition seal portion that is in surface contact with the partition blade portion upper end surface of the doctor blade, which is integrally connected from the annular seal portion, a container is provided. It is possible to secure the sealing property at the abutting part of the lower end surface of the main body and the upper end surface of the doctor blade, that is, the sealing property of the partition part of each chamber, which allows ink to leak from one chamber to another. It is possible to reliably prevent mixing of multicolor inks.

According to the second aspect of the invention, since the plate-like packing is made of a solvent-resistant resin having flexibility, the plate-like packing is compressed by the lower end surface of the container body and the upper end surface of the doctor blade. By applying force, it is possible to deform this plate-like packing between the lower end surface of the container body and the upper end surface of the doctor blade, and make it adhere to the lower end surface of the container main body and the upper end surface of the doctor blade. As a result, the sealing effect of the plate-like packing can be exhibited more reliably.

According to the third aspect of the invention, the urging force of the pressurizing means to the printing plate side of the container body is applied to the doctor blade from the container body through the plate-like packing, and the doctor blade forms the printing plate. As a result of being pressed by a predetermined pressure and coming into contact with each other, as a result, the lower end opening of the doctor blade is well sealed, and a compressive action is applied to the plate-like packing interposed between the container body and the doctor blade. Therefore, it becomes possible to more reliably perform the sealing property at the abutting portion of the lower end surface of the container body and the upper end surface of the doctor blade by the plate-like packing.

Further, according to the fourth aspect of the present invention, a peripheral groove is formed on the inner peripheral surface of the annular blade retainer attached to the lower portion of the container body, and the peripheral groove is provided with an O-ring which comes into pressure contact with the outer peripheral surface of the doctor blade. Therefore, the O-ring can be pressed against the outer peripheral surface of the doctor blade with a predetermined pressure contact force without being affected by how the blade holder is attached to the container body. It becomes possible to reliably perform the sealing between the surface and the outer peripheral surface of the doctor blade.

[Brief description of drawings]

FIG. 1 is a side view of a pad printing machine according to the present invention.

FIG. 2 is an operation explanatory diagram of the pad printing machine.

FIG. 3 is an enlarged plan view of a main part of the pad printing machine.

FIG. 4 is a partially sectional front view of FIG.

5 is a sectional view taken along the line AA in FIG.

FIG. 6 is a bottom view of the container body.

7 is a cross-sectional view taken along the line EE of FIG.

FIG. 8 is a bottom view of the doctor blade.

FIG. 9 is a cross-sectional view taken along line Woo of FIG.

FIG. 10 is a plan view of a plate packing.

11 is a cross-sectional view taken along the line A-E of FIG.

FIG. 12 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Pad Printing Machine 4 Transfer Pad 5 Printing Plate 6 Ink Container 30 Container Main Body 31 Peripheral Wall 32 Partition Walls 33a, 33b Chamber 40 Doctor Blade 41 Ring Blade 42 Partition Blade 50 Plate Packing 51 Ring Seal Part 52 Partition Seal Part 60 Blade Presser foot 61 Annular groove 62 O-ring

Claims (4)

[Claims] 1. An ink container having an opened lower end, a printing plate on which the ink in the ink container is applied to a printing pattern by moving in contact with the lower end of the ink container, and the printing pattern applied to the printing pattern. What is claimed is: 1.A pad printing machine, comprising: a transfer pad for copying ink and transferring it to a printing material, wherein the ink container is partitioned into a plurality of chambers by at least one partition wall extending in the same direction as the printing plate moving direction. A container body, a doctor blade having a ring-shaped blade portion that is attached to the lower portion of the container body and that faces the peripheral wall of the container body, and a linear partition blade portion that faces the partition wall; A ring-shaped seal which is interposed between the lower end surface and the upper end surface of the doctor blade and which makes surface contact with the lower end surface of the peripheral wall of the container body and the upper end surface of the ring-shaped blade portion. And a plate-like packing having a partition seal portion which is integrally connected from the ring-shaped seal portion and is in surface contact with the lower end surface of the partition wall of the container body and the upper end surface of the partition blade portion. A pad printing machine characterized by that. 2. The pad printing machine according to claim 1, wherein the plate-like packing is made of a solvent-resistant resin having flexibility. 3. The pressurizing means for pressing the lower end of the doctor blade against the printing plate through the plate-like packing by urging the container body toward the printing plate is provided. The pad printing machine according to claim 2. 4. An annular blade retainer having an inner peripheral surface that allows a doctor blade to be fitted therein is detachably provided at a lower portion of the container body, and a peripheral groove is formed on the inner peripheral surface of the blade retainer. The pad printing machine according to claim 1, 2 or 3, wherein an O-ring is provided in the circumferential groove, the O-ring being in pressure contact with the outer peripheral surface of the doctor blade.