KR100413023B1 - Frit applying method and apparatus of the same - Google Patents

Abstract

In the frit coating method, a predetermined amount of frit is reliably and uniformly applied to the object to be coated.

The frit 22 is applied to a predetermined portion of the object to be coated 4 via the roller applying means 24. The roller application means 24 has a concave-convex surface 25.

Description

FRIT APPLYING METHOD AND APPARATUS OF THE SAME

The present invention relates to a frit coating method and a frit coating apparatus suitable for applying a frit to a coated object such as a glass tube part of a flat cathode ray tube.

As a conventional cathode ray tube, a reflection or transmissive flat cathode ray tube is known. For example, a reflective flat cathode ray tube is known to be low in manufacturing cost and excellent in image quality. As shown in FIG. 15 (perspective view), FIG. 16 (sectional view), and FIG. 17 (exploded perspective view of the glass tube), in this type of flat cathode ray tube 1, the first panel, in this example, the front panel 2, A second panel on which the fluorescent surface 5 is formed, and in this example, a flat glass tube 6 composed of three bodies of a screen panel 3 and a funnel 4 is provided. It is comprised by enclosing the electron gun 8 in the neck part 7.

The front panel 2 is formed of flat plate glass, for example. The screen panel 3 is formed so that a curved surface may have a granular part and what is called a skirt part 3a in three sides except the joining side with the perimeter 4. The perimeter 4 has a large diameter opening on the end surface side of the joint with both panels 2 and 3, and has a funnel shape, and is formed in a shape in which the neck portion 7 is joined to the rear side.

For example, the flat glass tube 6 applies a frit between the front panel 2 and the screen panel 3 with a dispenser, and fixes both panels 2 and 3 with a jig, A frit is applied to the joining end surface 4A of the funnel 4, and both panels 2 and 3 and the funnel 4 are fixed with a sealing device, and are joined and joined by frit attachment in a furnace. do.

Conventionally, frit application to the perimeter 4 has been carried out by a dispenser or roller. However, in the application by the roller, there is a problem that the amount of frit adhered to the roller is unstable and the amount of frit applied to the perimeter 4 is not stabilized.

In view of the above, the present invention aims to stabilize the amount of frit applied to the object to be coated to improve frit coating, and to improve the efficiency of the coating process and to stabilize product quality, and to apply frit. To provide a device.

1 is a flow chart showing a frit seal attachment process of a glass tube of a flat cathode ray tube according to an embodiment of the present invention.

Figure 2 is a schematic block diagram showing an embodiment of the frit coating device of the present invention.

3 is a cross-sectional view of the frit coating device of FIG.

4 is a top view of the frit coating device of FIG.

FIG. 5 is an operation explanatory diagram of the frit coating device of FIG. 2. FIG.

Fig. 6 is a perspective view showing one embodiment of the sealing attachment device of the present invention.

Fig. 7 is a side view showing an embodiment of the seal attachment device of the present invention.

8 is a perspective view showing one embodiment of a sealing jig according to the present invention;

9 is an exploded perspective view of a main part of the sealing jig of FIG. 8.

FIG. 10 is a perspective view illustrating an assembled state of a main part of the sealing jig of FIG. 8. FIG.

Fig. 11 is a top view of a state in which both panels are held by the sealing jig of Fig. 8.

12 is a perspective view showing another embodiment of the seal attachment device of the present invention.

13 is a sectional view of an essential part showing an example of a junction portion of an assembly of a front panel and a screen panel and a funnel;

14 is a perspective view of an essential part showing an example of an assembly of the front panel and the screen panel with the perimeter.

15 is a perspective view of a flat cathode ray tube applied to the present invention.

16 is a cross-sectional view of the flat cathode ray tube of FIG. 15.

17 is an exploded perspective view of the glass tube of the flat cathode ray tube of FIG. 15;

<Explanation of symbols for main parts of drawing>

1: flat cathode ray tube

2: front panel

3: screen panel

3a: skirt section

3B, 4A: bonded end face

4 funnel

5: fluorescent surface

6: glass tube

7: neck part

8: electron gun

21: front panel coating device

22: frit

23: frit jaw

24: roller type application means

25: uneven surface

27: axis of rotation

28 power transmission means

29: drive motor

26; 26A, 26B: supply amount control means

30, 50: sealing attachment device

31: support

32: arm

33: sealing stand

34: back fixing plate

35, 36: fusion means

38: support

39: contact

40: locking part

41: Jig With Seal

42: ring-shaped holding body

43, 44: leaf spring

45; 45a, 45b: absence

46: weight weight means

47: weight

57: leaf spring end

58: press

The frit coating method according to the present invention is adapted to apply the frit supplied from the frit supply means to a predetermined portion of the object to be coated through a roller type coating means.

In the frit coating method of the present invention, by applying the frit through the roller type applying means, the amount of frit supplied by the roller type applying means is stabilized, and the amount of application of the frit to the object to be coated is stabilized, and the frit coating can be performed satisfactorily.

The frit applying apparatus according to the present invention includes frit supply means for supplying a frit, roller application means for supplying the frit to the object to be coated, and moving means for moving the object to be applied to the roller application means.

In the frit coating apparatus of the present invention, since the object to be coated moves by the moving means in close proximity to the roller-type coating means supplied with the frit, the application amount of the frit to the object to be coated is stabilized and the favorable frit coating to the object to be coated is applied. Becomes possible.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In this embodiment, the case where it applies to the frit sealing adhesion of the flat glass tube 6 in the flat cathode ray tube 1 mentioned above is demonstrated.

As described above, the flat glass tube 6 has a first panel, a flat front panel 2 in this example, a second panel, a curved surface in this example, a granular part on three sides, a so-called skirt part 3a. The screen panel 3 of the shape in which () is formed, and three pieces of the perimeter 4 which have the neck part 7 are comprised.

Fig. 1 shows a flow chart of the frit sealing attaching process of such a flat glass tube 6. The front panel 2, the screen panel 3 and the perimeter 4 are prepared. The screen panel 3 prepared in step S2 forms the fluorescent surface 5 on its inner surface in step S3. The fluorescent surface 6 can be formed by, for example, a transfer method. For example, in the case of the reflective type, the fluorescent surface 6 is formed by using a transfer foil in which an electrode layer, a reflective layer, a phosphor layer, and an adhesive layer of a transparent conductive film (for example, an ITO film) are sequentially stacked on a peeled base film. It can be formed.

Subsequently, in step S4, a frit (so-called frit glass) is applied to the bonding end surface of the screen panel 3 with the front panel 2, that is, the bonding end surface 3B of the skirt portion 3a by a dispenser, for example. Apply. The frit-coated screen panel 3 and the front panel 2 prepared in step S1 are held by a sealing jig (so-called panel pressing jig) described later in step S5 in a state where the bonding surfaces thereof are aligned with each other. .

On the other hand, the perimeter 4 prepared in step S6 applies a carbon film to be an internal conductive film on its inner surface in step S7. Subsequently, in step S8, the frit is applied to the bonding end surface 4A between the permeer 4 and the panels 2 and 3 by a frit coating device described later. The application of this frit is applied by roller-type application means.

Then, the perimeter 4 to which the frit was apply | coated and the both panels 2 and 3 hold | maintained with the sealing jig are hold | maintained by the sealing attachment apparatus mentioned later in step S9 in the state which the bonding surface mutually aligned. Then, the sealing device is placed in a required heating furnace to melt and crystallize the frit to join and coalesce the front panel 2, the screen panel 3, and the perm 4 together to form a flat shape. The glass tube 6 is produced.

In addition, in this example, the frit was applied to the screen panel 3 using a dispenser. Alternatively, the frit may be applied using a roller type coating means. Moreover, also when applying a frit to the front panel side, a roller type | mold application means can be applied.

In this embodiment, the application of the frit to the bonding end face 4A of the perimeter 4 is performed on the uneven surface of the roller-type coating means by using a roller type coating means having the frit supply surface as the uneven surface. The frit is applied to the joint end surface 4A of the permeer 4 by moving the permeer 4 close to the concave-convex surface supplied with the frit. At this time, the supply amount control means for controlling the supply amount of the frit controls the supply amount of the frit to the uneven surface of the roller-type coating means, defines the frit supply amount, and is uniform with respect to the joining end surface 4A of the trellis 4. Application of a predetermined amount of frit.

2 to 4 show an embodiment of the frit coating apparatus according to the present invention.

The frit coating device 21 according to the present embodiment includes a frit supply means for supplying a frit, a frit tank 23 containing a frit 22 in this example, a to-be-applied body, and a perimeter in this example ( Roller-type application means for directly applying a frit to the bonding end face 4A of 4), in this example, a frit supplied to the application roller 24 and the frit supply surface 25 of the application roller 24. Supply amount control means for controlling the amount of (22), in this example, the adjustment rollers 26 (26A, 26B) and the joining end surface 4A of the perforator 4 in the state of facing downward of the application roller 24 And moving means (not shown) for moving through the application roller 24 in proximity to the uneven surface 25.

The application roller 24 is rotatably arranged in such a manner that a part of the frit supply surface 25 is present in the frit 22 of the frit jaw 23. The frit feed surface 25 is formed with a grooved surface having a groove formed in a longitudinal and horizontal lattice shape. The rotary shaft 27 of the application roller 24 is connected to the drive motor 29 via a chain 28 or the like, which is a power transmission means. Therefore, the application roller 24 is rotated by the drive motor 29 so that the frit 22 in the frit jaw 23 is supplied to the frit supply surface, that is, the uneven surface 25. Since the frit feed surface is the uneven surface 25, the frit 22 is stably wound up on the surface 25 of the application roller 24.

The application roller 24 is fitted to the adjustment plates 26 (26A, 26B) and is installed in a symmetrical position. One adjustment plate 26A is for supplying a predetermined amount of frit 22 to the uneven surface 25 of the application roller 24 at the time of application of the frit, the front end of which is the uneven surface of the application roller 24. That is, they are arranged so as to face each other at predetermined intervals to define the amount of frit supplied with respect to the uneven surface 25 of the portion exposed from the frit 22 of the frit jaw 23. In the case of moving the perm as a to-be-applied body in the reverse direction, the application roller 24 rotates in the reverse direction, and at this time, the amount of frit supplied to the uneven surface 25 is defined by the other control plate 26B.

Although not shown, the moving means moves its tube axis direction in a vertical state such that the joint end face 4A of the perimeter 4 faces the application roller 24 side, that is, for example, from right to left in FIG. 3. It is configured to move to.

5 shows the operation of the frit coating device 21.

At the time of frit application, the application roller 24 rotates counterclockwise m in the drawing via the drive motor 29. Thereby, the frit 22 in the frit tank 23 is wound up while being supplied to the uneven surface 25 of the application roller 24, and the frit 22 is formed to have a predetermined supply thickness d in the upper control plate 26A. ), The predetermined amount of frit 22 is supplied to the application roller 24 in a uniform thickness on the surface. With respect to this rotating application roller 24, the perimeter 4 passes through the application roller 24 by the moving means in a vertical state with its joining end face 4A facing down. The frit 22 is uniformly applied to the bonding end face 4A of the perimeter 4 when doing so.

According to the frit coating method using the frit coating device 21 of the present embodiment, the frit 22 is a frit supply surface by making the frit supply surface 25 of the application roller 24 an uneven surface. The frit 22 can be stably supplied by the frit supply surface 25. In addition, the frit supply amount to the frit supply surface 25 is defined by a predetermined amount by the adjusting plate 26A or 26B, and the frit 22 can be uniformly supplied to the entire surface of the supply surface 25. And since the frit 22 is apply | coated to the bonding end surface 4A by letting the bonding end surface 4A of the truce 4 as close as possible to the roller 24 for application | coating, the bonding end surface of the trellis 4 ( A predetermined amount of frit 22 can be applied stably and evenly within 4A). That is, it can apply | coat stably and uniformly over the whole area | region (without the so-called uncoated part) including the corner part of 4 A of joining end surfaces of the permeable 4. As a result, the frit bonding between the permeable 4 and the panels 2 and 3 is completed, so that air leakage (so-called air leakage) in which air flows from the outside of the glass tube into the tube body does not occur. Moreover, the application amount of a frit can also be apply | coated stably and uniformly also to each perm | perme 4. Therefore, the frit 22 can be favorably applied to the funnel 4, the efficiency of the frit coating process can be improved, and finally the product quality of the flat cathode ray tube can be stabilized.

In addition, although the frit application to the funnel 4 was demonstrated, it is possible to apply the frit application method of a present Example also about the frit application to the screen panel 3 and the front panel 2. FIG.

6 and 7 show one embodiment of the frit seal attaching method of the present invention and a seal sticking apparatus used therein.

As shown in FIG. 6, the sealing attachment device 30 according to the present embodiment has a common U-shaped arm 32 on a common support 31, as each is composed of a heat resistant member. A plurality of sealing mounts 33 are attached to the horizontal portion of the arm 32 and determine the positions of the above-described frit-coated front panel 2, screen panel 3 and perimeter 4 in parallel. Is arranged.

As shown in FIG. 7, the sealing mount 33 has a rear fixing plate 34 attached to the arm 32, and is fitted to the rear fixing plate 34 with the outer surface of the perimeter 4 to adjust its position. The first fusion means 35 made of, for example, adjustment screws, the second fusion means 36 made of, for example, adjustment screws, which fuse with the outer surface of the flat front panel 2 and set the position thereof; Supporting part which can insert the neck part 7, the contact part 39 which contacts the circumferential surface of the neck part 7, and the latching part 40 which fastens the perimeter 4 to the back fixing plate. Is made to be attached.

On the other hand, a sealing jig for holding the front panel 2 and the screen panel 3 in the bonded state with the frit 22 therebetween is provided. In the present example, the front panel 2 and the screen panel 3 are attached to the outer periphery of both panels 2 and 3 in a state where the front panel 2 and the screen panel 3 are joined to each other with the frit 22 interposed therebetween, so-called, The ring holder 41 is provided. As shown in Fig. 8, the ring holder 41 has a ring holder body 42 for substantially holding the panels 2 and 3 formed of metal strips, and the front panel of the ring holder body 42 is provided. The elastic member which bend | folded both ends inward, respectively, in this example, the side plate part of the side plate part of the side (2) and the side plate part of the screen panel 3 side which are opposite to this, are integrally attached, On both ends of the leaf spring 43 on the front panel 2 side, as described later, the members 45; 45a, 45b having a hardness less than or equal to the hardness of the front panel, so-called panel glass, preferably softer than the panel glass are attached. Moreover, a load provision means, for example, the weight weight means 46 is provided and comprised. The press-contacting end which presses against the panel of the leaf spring 43 and 44 has four left and right, respectively a top and a bottom. That is, two members 45a and 45b of one leaf spring 43 are provided in the upper and lower two pieces (four in total), and two ends 44a and 44b of the leaf spring 44 of the other leaf each have two upper and lower parts. (4 total) will be installed.

The sealing attachment device 31 of FIG. 7 has a rear surface such that the flat glass tube (combination of the front panel 2 and the screen panel 3 and the permeable 4) to which the frit seal is attached is kept slightly inclined than the vertical state. The fixed plate 34 is inclined.

As shown in Fig. 11, one leaf spring 43 has members 45a and 45b at both ends elastically pressing both edge portions of the front panel 2, and the other leaf spring 44 Both ends 44a and 44b are made to elastically press the outer both ends of the screen panel 3, respectively. Thereby, both panels 2 and 3 are mutually press-contacted and mutually matched, maintaining a predetermined positional relationship.

The weight weight means 46 has the weight weight 47, and the both ends of this weight weight 47 are supported by the pair of arms 48a and 48b, and the hook part provided in the upper end of the arms 48a and 48b. 49a and 49b are made to span the protruding terminals 52a and 52b of the arms 51a and 51b attached to the left and right sides of the ring-shaped holding body 42. As shown in FIG.

The members 45 (45a, 45b) attached to both ends of the leaf spring 43 are preferably formed of a material having a hardness of about 1 to 5 in Mohs hardness. The member 45 can be formed of a block member such as carbon, graphite, mica, or alumina, for example, and is formed of a carbon block in this example. The hardness of panel glass is about 5-9 (including tempered glass) by Mohs' hardness. As shown in Figs. 9 and 10, the member 45 is formed into a shape having light area portions 56 (56a, 56b) above and below with the center reduction portion 55 interposed therebetween. The c-shaped end 57 of the leaf spring 43 is inserted to engage the reduction portion 55 of the member 45, and the c-shaped pressing piece 58 is perpendicular to the insertion direction of the leaf spring end 57. The member 45 is fixed to the leaf spring end 57 by being inserted to engage with the reduction portion 55 from the direction of forming the portion. The pressing piece 58 is fixed to the leaf spring end 57 via the fastening screw 59. The member 45 is not missing from the leaf spring end 57 by this pressing piece 58.

According to the frit sealing attachment method using the sealing attachment device 31 of this embodiment, the combination which joined the joining end surfaces of the front panel 2, the screen panel 3, and the perimeter 4 through the frit is the same. As the front panel 2 is inclined to be fitted to the fusion means 36 of the mount 33, that is, the angle formed between the front panel surface and the horizontal surface is held at the mount 33 so as to be acutely angled, so that the front panel 2 is sealed. Frit sealing can be performed. Usually, at the three-point junction A (see Fig. 15) where three points of the front panel 2, the screen panel 3, and the perimeter 4 are collected, air leakage from the outside is likely to occur, so that frit sealing is attached. You must do this more reliably. In this embodiment, since the frit seal is attached in a state where the front panel 2 side is inclined downward, when the melted frit flows in the gravity direction, the frit gathers at the three-point junction A and reliably attaches. Accordingly, in the sealing attachment device 31 of the present embodiment which can reliably prevent air leakage at the three-point junction A, the front panel 2 held in the bonded state as the ring holder 41 is fitted. 6 and 7, the combination of the panel and the screen panel 3 is mounted on the rear fixing plate 34 and both panels 2 are mounted on the perimeter 4 with the joining end surface 4A upward. And the joining end face of the combination of 3). In this case, when the fusion means 35 is fused to the outer surface of the perimeter 4 by fusion of the fusion means 36 to the outer surface of the front panel 2, the combination of both panels 2 and 3 is connected to the permeation 4. Relative to the predetermined position relationship. The weight weight means 46 is suspended on the ring-shaped holding body 42. Since the weight weight 47 is vertically lowered by the rear fixing plate 34, the weight weight 47 does not shake unnecessarily and moves downward, and provides downward force to the ring-shaped holding body 42 so that both panels 2 and The assembly of 3) can be held firmly.

Since the hardness of the member 45 is below panel glass, for example, a carbon block is softer than panel glass, the front panel 2 is not damaged. In addition, such members 45 (45a, 45b) are attached to both ends of one leaf spring 43 attached to the ring-shaped holding body 42, and this member 45 attaches the edge portion of the front panel 2 to each other. By pressing, further growth from the microcracks generated when the ring-shaped holding body 42 is fitted to the front panel 2 after chamfering at the frit firing time (for example, 400 ° C. to 500 ° C.) is thus prevented. No damage is caused and at the same time safety of the frit firing can be achieved.

In addition, in the flat front panel 2, the edge part is chamfered. When both the leaf springs 43 and 44 are made of metal plate spring only, when the metal plate spring 43 is directly pressed against the edge portion of the front panel 2 after chamfering to hold the front panel 2 and the screen panel 3 In addition, damage to the chamfers may occur, such as micro cracks. When frit firing is performed in the furnace, stress occurs on the front panel 2, and the micro cracks may grow and become large cracks, resulting in breakage. However, in the present embodiment, the occurrence of such damage can be suppressed to prevent breakage of the front panel, and the frit firing can be safely performed.

By using the sealing attachment device 31 of this embodiment, when the frit joining of the front panel 2 and the screen board 3 and the frit joining of both panels 2 and 3 and the perimeter 4 are performed individually. In comparison, handling and sealing can be greatly simplified.

In addition, in the above example, the flat glass tube to be frit-sealed is kept in an inclined state. In addition, for example, the rear fixing plate 34 is vertically or approximately to maintain the flat glass tube in a vertical or approximately vertical state. It is also possible to set it as the structure arrange | positioned vertically.

In the case of sticking frit in a vertical state, the thickness of the frit becomes uniform throughout, resulting in a higher seal strength. In addition, when the frit becomes partially thick, the seal strength generally weakens.

When the frit seal is attached in an inclined state, each front panel 2 and the permeable 4 reliably touch the fusion means 36 and 35 for positioning, thereby increasing the assembly accuracy. In fact, it is better to use it in a well-balanced inclined state.

In addition, in the present invention, the arrangement position of the flat glass tube with the frit seal may be vertical, inclined, or laid down (for example, horizontally).

In the above example, the ring-shaped holding body 42 is used as the holding means for holding the front panel 2 and the screen panel 3 in the bonded state. In addition, the above-mentioned first and second elastic members are used as the holding means. Any structure may be used as long as the front panel 2 and the screen panel 3 can be held in a bonded state.

12 shows another embodiment of the sealing device of the present invention.

The sealing attachment device 50 according to the present embodiment is a combination of the front panel 2, the screen panel 3, and the permeable 4 such that the front panel 2 and the screen panel 3 are opposite to those in FIG. 7 described above. Is mounted on the rear fixing plate 34 of the mount 33. That is, the bonding end surface 4A is mounted on the perimeter 4 on which the bonding end surface 4A is upward so as to bond the bonding end surfaces of the combination of both panels 2 and 3 together, and at this time, the outer surface of the screen panel 3 is bonded to the bonding means ( 36), the outer surface of the perimeter 4 is fused to the fusion means 45. Since the other structure is the same as that of FIG. 7 mentioned above, detailed description is abbreviate | omitted.

Also in the sealing apparatus 50 of a present Example, three pieces of the front panel 2, the screen panel 3, and the permeable 4 can be sealed together collectively. In addition, crack generation during the frit firing can be prevented, and safe frit firing is possible without damaging the front panel 2.

By using the sealing attachment devices 30 and 50 and the sealing jig 41 of the present embodiment, each front panel 2, the screen panel 3, and the perimeter 4 can be maintained without being damaged, and handling and sealing The attachment work can be greatly simplified.

In the frit bonding between the combination of the front panel 2 and the screen panel 3 and the perimeter 4, when the frit bonding cannot be performed well, the leakage of air into which the air flows from the outside of the glass tube into the tube body Is generated. The failure of the frit joining is the position of the joining end faces when the width of the joining end face of the perimeter 4 and the width of the joining end face on the side of the frit of the frit 2 and the screen panel 3 are the same. The dissolution causes the elution frit to hit the junction, resulting in insufficient frit bonding.

For this reason, in the present embodiment, as shown in Figs. 13 and 14, the perimeter 4 is screened at the joint surface between the combination of the front panel 2 and the screen panel 3 and the perimeter 4. (2), it is made to form the frit reservoir shelf 61 which protrudes inward rather than the screen panel 3, and collects the frit which elutes over the inner periphery of the bonding surface. Specifically, the width W ₁ of the joining end face of the perimeter 4 is set larger than the width W ₂ of the joining end face of the frit 2 and the screen panel 3.

With this configuration, the elution frit 22 is stored in the frit reservoir shelf 61 at the joint portion at the time of the frit seal process and prevented from flowing downward. In this state, the elution frit 22 is cooled and crystallized. Along the entire inner circumference of the joint surface will be covered. As a result, leakage of air from the outside to the inside of the flat glass tube body can be prevented, and highly reliable frit sealing can be performed.

The frit coating method and the frit coating apparatus 21 described above have been applied to the application of the frit to the perimeter 4 of the flat cathode ray tube 1, but can also be applied to the application of the frit to other to-be-coated objects.

In the above example, the present invention has been applied to frit sealing adhesion of a reflective or transmissive flat cathode ray tube in which the fluorescent surface 5 is formed on the inner surface of the screen panel 3. It is also possible to apply it to the frit sealing adhesion of the transmissive flat cathode ray tube in which the fluorescent surface 5 was formed in the inner surface. In this case, the front panel 2 becomes a so-called screen panel.

According to the frit coating method according to the present invention, the frit supplied from the frit supplying means can be applied to a predetermined portion of the object to be coated by a roller type coating means so that stable frit coating can be performed on the object to be coated. That is, it can apply | coat stably and uniformly over the whole area | region including the corner part of the junction end surface of a perm (without what is called uncoated part). As a result, the frit joining between the perm and both panels is completed, and air leakage does not occur.

By making the frit supply surface of the roller type application means into the uneven surface, the frit can be stably supplied to the frit supply surface. In addition, since the object to be coated is brought close to the roller applying means supplied with the frit, and the frit is applied onto the surface of the object to be coated, a predetermined amount of frit can be stably applied to the object to be coated.

Further, by controlling and supplying the frit to a predetermined amount to the roller applying means, the amount of frit can be more precisely regulated, and a predetermined amount of frit can be reliably and uniformly applied to the object to be coated.

According to the frit applying apparatus according to the present invention, since the frit application to the to-be-coated object is performed through the roller type coating means, it is possible to stably and satisfactorily apply the frit to the to-be-coated object.

By making the frit supply surface of the roller-type coating means into the uneven surface, the frit can be stably supplied to the frit supply surface, and a stable amount of frit can be applied to the object to be coated.

Further, by providing a supply amount control means for controlling the amount of the frit supplied to the roller applying means, the frit supply amount is precisely regulated, so that a predetermined amount of frit can be reliably and uniformly applied to the object to be coated.

As described above, in the present invention, the application amount of the frit is made uniform with respect to the to-be-coated object, and the coating process can be made more efficient and the product quality can be stabilized.

In particular, the present invention is suitable for application to frit sealing adhesion of glass tubes of flat cathode ray tubes.

Claims (10)

In the method of applying a frit to the junction part of the perimeter 4, the front panel 2, and the screen panel 3 of the flat cathode ray tube which is a coated object, The frit supplied from the frit supply means is conveyed through roller-type coating means having a lattice irregularity surface, While moving the said to-be-coated body by the moving means provided in proximity to the said roller type | mold coating means, A control means provided at a symmetrical position with the roller application means interposed therebetween, so as to supply the frit even if the roller application means is rotated in any direction, so as to control the frit. delete delete delete delete In the frit coating apparatus for the junction part 4 of the flat cathode ray tube which is a to-be-applied body, the front panel 2, and the screen panel 3, Frit feeding means for feeding frit, Roller-type coating means having a lattice-shaped concavo-convex surface for supplying the frit to the object to be coated, Control means which is provided at a symmetrical position with the roller application means interposed therebetween, and controls the roller application means so as to have an appropriate amount of frit even when the roller application means is rotated in any direction; Moving means for moving the object to be coated close to the roller-type coating means A frit coating device comprising a. delete delete delete delete