JPS598241A - Production method of crt - Google Patents

Production method of crt

Info

Publication number
JPS598241A
JPS598241A JP11612482A JP11612482A JPS598241A JP S598241 A JPS598241 A JP S598241A JP 11612482 A JP11612482 A JP 11612482A JP 11612482 A JP11612482 A JP 11612482A JP S598241 A JPS598241 A JP S598241A
Authority
JP
Japan
Prior art keywords
panel
temperature
heating
heat
funnel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11612482A
Other languages
Japanese (ja)
Inventor
Fumio Koike
小池 二三男
Kazuo Yamashita
一男 山下
Akira Hasegawa
彰 長谷川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11612482A priority Critical patent/JPS598241A/en
Publication of JPS598241A publication Critical patent/JPS598241A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26Sealing together parts of vessels
    • H01J9/263Sealing together parts of vessels specially adapted for cathode-ray tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

PURPOSE:To save energy and seal a panel and a funnel very exactly by performing the heat decomposition process of the organic substance coated on the inner surface of the panel and the heat seal process of the panel and funnel concurrently on the same heat temperature schedule and in the same heating furnace. CONSTITUTION:A panel 121 with its organic substance being heat-decomposed beforehand is exactly positioned against a funnel and placed through a frit glass 13 in a heating furnace 11, and a panel 122 not yet heat-decomposed is also supported with a suitable jig. A separator 15 is between the panels 121, 122, the air with a speed of 0.5-10m/sec is fed from a dashed line arrow 161 direction and discharged in a dashed line arrow 162 direction, thus oxygen is fed to the frit glass 13 and also the frit glass 13 is prevented from being stained with the gas generated by the heat decomposition of the organic substance. The heat temperature schedule is a temperature rise speed of 6 deg.C/min or less from the ordinary temperature to 330 deg.C-370 deg.C and a temperature rise speed of 7 deg.C/min or more from 330 deg.C-370 deg.C to 430 deg.C-445 deg.C, and after being kept at that temperature for a predetermined time they are cooled off.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は陰極線管の製造方法に係り、特にパネルの内面
に塗布された有機物の加熱分解工程と、パネルとファン
ネルとをフリットガラスの加熱結晶化により封着する加
熱封着、工程の合理化、省エネルギー化を行なうことが
可能な陰極線管の製造方法に関するものである。
[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for manufacturing a cathode ray tube, and in particular, a process of thermally decomposing an organic substance coated on the inner surface of a panel, and heating and crystallizing frit glass for forming a panel and a funnel. The present invention relates to a method for manufacturing cathode ray tubes that allows heat sealing, process rationalization, and energy saving.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

陰極線管例えばカラー受像管のパネル内面には赤、緑、
青各色に発光する螢光体層と、この螢光体層背面に被着
形成された金属蒸着膜とからなる螢光面が被着形成され
ているが、この螢光体層は各色に発光する螢光体粉末を
有機物であるポリビニールアルコールを主成分とする感
光液にけん濁して塗布し、露光工程、現は工程を経で形
成され、また金属蒸4膜は螢光体層上に更に有機物であ
るフッカ−などを塗布したのち形成され、最終的にこれ
ら有機物を加熱分解して除去することによりいわゆるメ
タルバックされた螢光面が得られる。
The inner surface of the panel of a cathode ray tube, such as a color picture tube, has red, green,
A phosphor surface consisting of a phosphor layer that emits light in each color of blue and a metal vapor deposited film deposited on the back surface of this phosphor layer is formed, but this phosphor layer emits light in each color. The phosphor powder is suspended in a photosensitive liquid mainly composed of polyvinyl alcohol, which is an organic material, and then applied through an exposure process, and the metal vapor film is formed on the phosphor layer. Further, an organic substance such as a hooker is applied and then formed, and by finally removing these organic substances by thermal decomposition, a so-called metal-backed fluorescent surface is obtained.

この有機物の加熱分解工程は、例えば第1図に折蘇で示
すような加熱温度スケジュール0υによって行なわれる
。この折線(1)のうら立上り部(l、)は4°0/分
程度の昇温によ(ハ陰極縁管の機能および製造工程に有
害な有機物を加熱分解し°(除去する工程である。この
工程が4“C/分程度で比較的昇縣速度を低くしでいる
理由は、有機物の表面に金属蒸着膜が0.2〜0.4μ
厚はどこされていて急激な外扇を実施すると、この金属
蒸4膜例えばアルミニウム膜が破壊されてしまうからで
ある。
This step of thermally decomposing the organic matter is carried out, for example, according to a heating temperature schedule of 0υ as shown by the dotted line in FIG. The rising part (l, ) on the back of this fold line (1) is a process in which organic substances harmful to the function and manufacturing process of the cathode edge tube are thermally decomposed and removed by increasing the temperature at a rate of about 4°0/min. The reason why this process achieves a relatively low crystallization rate of about 4"C/min is because the metal vapor deposited film is 0.2 to 0.4 μm on the surface of the organic material.
This is because the metal vapor film, for example, the aluminum film, will be destroyed if the thickness is determined and if the external fan is applied suddenly.

また、パネルとファンネルとをフリットガラスにより封
着する加熱封着工程は、例えば、第2図に折線で示すよ
うな加熱温度スケジュール(2)によって行なわれる。
Further, the heat sealing step of sealing the panel and the funnel with frit glass is carried out, for example, according to the heating temperature schedule (2) as shown by the broken line in FIG.

この折線(2)のうち、立上り部(21)は9℃/分で
あり、この昇温速度が比較的高い理由は、最適なフリッ
トガラス形状が得られ、かつフリットガラスを結晶化さ
せるために必要な冷温であるからである。
Of this broken line (2), the rising part (21) is 9°C/min, and the reason why this temperature increase rate is relatively high is that it is necessary to obtain an optimal frit glass shape and to crystallize the frit glass. This is because the temperature is necessary.

従って、有機物の加熱分解工程と、パネルとファンネル
の加熱封着工程には異なった加熱温度スケシールの加熱
炉が必要であった。
Therefore, heating furnaces with different heating temperatures were required for the thermal decomposition process of organic matter and the thermal sealing process of panels and funnels.

また一方、炉内雰囲気は有機物の加熱分解工程はさほど
問題にならないが、加熱封着工程はフリットガラスが結
晶化するためには酸素が必要であるので、酸化性雰囲気
とする必要がある。これも有機物の加熱分解工程と、カ
ロ熱封眉工程とを異った加熱炉で行なうことが必要な理
由でもあった。
On the other hand, the atmosphere in the furnace does not pose much of a problem in the thermal decomposition process of organic matter, but since oxygen is required in the thermal sealing process to crystallize the frit glass, it is necessary to create an oxidizing atmosphere. This was also the reason why it was necessary to perform the thermal decomposition process of organic matter and the Calo heat sealing process in different heating furnaces.

これに対し、省エネルギー化の立場から有機物の加熱分
解工程と、加熱封着工程を同時に同一炉で行なう方法が
例えは特公昭52−119062 号公報。
On the other hand, from the standpoint of energy saving, a method is disclosed in Japanese Patent Publication No. 52-119062, in which the thermal decomposition process of organic matter and the thermal sealing process are carried out simultaneously in the same furnace.

特公昭52−154338 号公報、特公昭53−59
60号公報などに開示されている。即ち、これら公報に
示されている方法は有機物の加熱分解前のパネルとファ
ンネルとの間に間隙をもたせ、有機物の加熱分解時に発
生するガスによる酸素欠乏状態を防止し、その後加熱封
着工程を行なう方法である。
Special Publication No. 52-154338, Special Publication No. 53-59
It is disclosed in Publication No. 60, etc. In other words, the methods disclosed in these publications provide a gap between the panel and the funnel before the organic matter is thermally decomposed to prevent an oxygen-deficient state due to the gas generated during the thermal decomposition of the organic matter, and then the heat sealing process is performed. This is the way to do it.

また、特開昭53−24772号公報、特開昭53−3
1957号公報、特開昭53−57743号公報に開示
されているように酸素を積極的に導入する装置を設けて
有機物の加熱分解工程とパネルとファンネルとの加熱封
着工程とを同時に同一炉で実施する方法もある。
Also, JP-A-53-24772, JP-A-53-3
As disclosed in Japanese Patent Publication No. 1957 and Japanese Patent Application Laid-Open No. 53-57743, a device for actively introducing oxygen is installed to perform the thermal decomposition process of organic matter and the thermal sealing process of panels and funnels simultaneously in the same furnace. There is also a way to do it.

これらの方法のうち、前者は加熱炉中でパネル表ファン
ネルとを位置合せ後側着さぜるため、封着精度を出しに
<<、また後者は酸素を導入する装置が複雑であり、共
に実用的でない、などの問題点がある。
Of these methods, the former requires side-bonding after aligning the panel and funnel in a heating furnace, which is important for sealing accuracy, and the latter requires a complicated device for introducing oxygen; There are problems such as impracticality.

〔発明の目的〕[Purpose of the invention]

本発明は前記従来の問題点に鑑みなされたものであり、
同一の加熱炉で有機物の加熱分解工程と、加熱封着工程
ととを同一の加熱温度スケジュールで行なうことが可能
であり、かつパネルとファンネルの封着も極めて正確に
行なうことかできると共に複雑な酸素を導入する装置も
不用な陰極線管の製造装置を提供することを目的として
いる。
The present invention has been made in view of the above-mentioned conventional problems,
It is possible to perform the thermal decomposition process of organic matter and the thermal sealing process with the same heating temperature schedule in the same heating furnace, and it is also possible to seal the panels and funnels extremely accurately, as well as to avoid complex processes. The object of the present invention is to provide a cathode ray tube manufacturing device that does not require a device for introducing oxygen.

〔発明の概要〕[Summary of the invention]

即ち、本発明の陰極線゛gの製造方法はパネル内面に塗
布された有機物の加熱分解工程と、パネルとファンネル
とをフリットガラスの加熱結晶化により耐着する加熱封
着工程とを同一の加熱炉で、同一の加熱温度スケジュー
ルで行なうことを特徴としており、この温度スケジュー
ルが単温から330°C乃至370°Cまで6°C/分
以下の昇温速j建、330υ乃至370’Oから430
℃乃至445℃まで7°C/分以上の昇温速度にする力
)、同一条件で0.5〜1(kn/ seeの風速の空
気を送るか、または常諷から330“C乃至370℃ま
で6〜lO℃/分の昇温速度、330℃乃至370°C
で10分以上保持し、その後430゜乃至445℃まで
7℃/分以上の昇温速度になされている。
That is, the method for producing cathode rays of the present invention performs the thermal decomposition process of the organic matter applied to the inner surface of the panel and the thermal sealing process of adhering the panel and the funnel by thermal crystallization of the frit glass in the same heating furnace. It is characterized by the same heating temperature schedule, and this temperature schedule is a heating rate of 6°C/min or less from a single temperature to 330°C to 370°C, and from 330υ to 370'O to 430°C.
℃ to 445℃ at a heating rate of 7℃/min or more), blowing air at a wind speed of 0.5 to 1 (kn/see) under the same conditions, or from 330"C to 370℃ under the same conditions. Heating rate of 6 to 10°C/min to 330°C to 370°C
The temperature was maintained at 430° to 445°C for 10 minutes or more, and then the temperature was increased at a rate of 7°C/min or more.

〔@明の実施例〕[@Ming Example]

次に本発明の一実施例を第3図及び第4図により説明す
る。
Next, one embodiment of the present invention will be described with reference to FIGS. 3 and 4.

即ち、加熱炉0υ内には前もって内面に塗布された有機
物を加熱分解したパネル(鳴)がフリソトガラスu違を
介してファンネルIに図示しない治具により正確に位置
ぎめ載置してあり、また内面に塗布された有機物の未加
熱分解のパネル(122)も適当な治具により支持され
ている。このパネル(12I)と(122)間には破線
で示す分離板(I!19を設ければ破線矢印(161)
方向から0.5〜lQm/ secの風速の空気を送り
、破線矢印(16t)方向に排気する時、フリットガラ
スQ3に酸素が供給されると共に有機物の加熱分解によ
るガスが、フリットガラス(13をよごすことがなくな
る。
That is, in the heating furnace 0υ, a panel (sound) made by thermally decomposing an organic material previously applied to the inner surface is placed on the funnel I through a Frisoto glass u with a jig not shown, and is placed on the funnel I using a jig (not shown). A panel (122) of unheated decomposition of organic matter coated on the substrate is also supported by a suitable jig. Between these panels (12I) and (122), there is a separation plate (I!19) shown by the broken line.
When air is sent from the direction at a wind speed of 0.5 to 1Qm/sec and exhausted in the direction of the dashed arrow (16t), oxygen is supplied to the frit glass Q3, and gas from the thermal decomposition of organic matter flows through the frit glass (13). There will be no more mess.

次に加熱炉(LD内の加熱温度スケジュールを第4図に
より説明すると、加熱温度スケジュール折線Qυは先ず
直線(211)のように常温から330°C乃至370
℃まで6°C/分以下の昇温速度で上昇させ、次に直線
(21*)のように330℃乃至370’Oから430
℃乃至445°Cまで7°C/分以上の昇温速度で上昇
させる、この直線(21□)の昇温速度では有機物の熱
分解で発生したガスにより金属蒸着膜を破壊しないよう
比較的に昇温率がゆるく、直i1 (21りではフリッ
トガラスuSを結晶化させて封着するため比較的に昇温
率が急みなっている。次に直線(213)のように所定
時間保持し、冷却すればパネル(211)とファンネル
α4)は結晶化されたフリットガラスにより封着され、
一方パネル(121)内面に塗布された有機物は加熱分
解することになる。
Next, to explain the heating temperature schedule in the heating furnace (LD) with reference to FIG.
℃ at a heating rate of 6°C/min or less, and then from 330℃ to 370'O to 430℃ like a straight line (21*).
℃ to 445°C at a heating rate of 7°C/min or more.With this linear heating rate (21□), it is relatively difficult to prevent the metal vapor deposited film from being destroyed by the gas generated by thermal decomposition of organic matter. The temperature increase rate is slow, and the temperature increase rate is relatively rapid in straight line (21) because the frit glass uS is crystallized and sealed. When cooled, the panel (211) and the funnel α4) are sealed by crystallized frit glass,
On the other hand, the organic substance applied to the inner surface of the panel (121) will be thermally decomposed.

次に本発明の他の実施例に適応する加熱温度スケシール
を第5図により説明する。
Next, a heating temperature scale applicable to another embodiment of the present invention will be explained with reference to FIG.

即ち、加熱温度スケジュール折線01)は、先ず直線(
311)のように常温から330’O乃至370″Cま
で6〜10°C/分の昇温速度で上昇させ、次に直線(
31,)に示すように330℃乃至370℃で10分間
以上保持し、次に直線(313)に示すように430℃
乃諺445°C才で7°C/分以上の昇温速度で上昇さ
せ、次に直線(314)のように所定時間保持し冷却す
る。
That is, the heating temperature schedule broken line 01) first becomes a straight line (
311), raise the temperature from room temperature to 330'O to 370''C at a rate of 6 to 10°C/min, then linearly (
31,), hold at 330°C to 370°C for 10 minutes or more, then heat to 430°C as shown in straight line (313).
The temperature is increased to 445°C at a rate of 7°C/min or more, and then the temperature is maintained for a predetermined period of time as shown in a straight line (314) for cooling.

このような加熱温度スケジュール折線011に沿って加
熱炉αυ内の温度を変化させることにより、直線(31
2)では有機物の加熱分解で発生したガスにより金属蒸
着膜を破壊しないようにし、m5(31,)ではフリッ
トガラスを結晶化させて封着することができるのは第4
図の場合と同様であり同一の加熱炉、同一の加熱温度ス
ケジュールにより有機物の加熱分解工程と、フリットガ
ラスによる加熱封着工程が同時にできる利点がある。
By changing the temperature inside the heating furnace αυ along the heating temperature schedule broken line 011, the straight line (31
In 2), the metal evaporated film is not destroyed by the gas generated by thermal decomposition of organic matter, and in m5 (31,), the frit glass can be crystallized and sealed.
This is similar to the case shown in the figure, and has the advantage that the thermal decomposition process of organic matter and the thermal sealing process using frit glass can be performed simultaneously using the same heating furnace and the same heating temperature schedule.

前記実施例では有機物の加熱分解工程を行なうパネル(
122)と、有機物の加熱分解を終了したパネル(12
1)をフリットガラス(13によりファンネルに封、層
する加熱封着工程を行なう外囲器をそれぞれ1個使用し
たが、これに限定されるものではなく、複数個づつ同時
に行なってもよいことは説明するまでもない。
In the above example, a panel (
122) and a panel (12
Although one envelope was used for each heat sealing process of sealing and layering the frit glass (1) into the funnel using the frit glass (13), the present invention is not limited to this, and it is possible to carry out the heat sealing process for multiple pieces at the same time. There's no need to explain.

〔発明の効果〕〔Effect of the invention〕

上述のように本発明の陰極線管の製造方法によれば同一
の加熱温度スケジュール、同一の加熱炉で有機物の加熱
分解工程と、パネルとファンネルの加熱封着工程を同時
に行なうことが可能なため省エネルギーになり、かつ、
加熱封着工程は治具によりパネルとファンネルを位置き
めしたのち行なうことが可能であるのでその工業的価値
は極めて大である。
As mentioned above, according to the method for manufacturing a cathode ray tube of the present invention, it is possible to simultaneously perform the thermal decomposition process of organic matter and the thermal sealing process of the panel and funnel in the same heating temperature schedule and the same heating furnace, resulting in energy savings. and,
Since the heat sealing process can be performed after positioning the panel and funnel using a jig, its industrial value is extremely large.

【図面の簡単な説明】[Brief explanation of the drawing]

渠1図は従来の有機物の加熱分解工程の加熱6%度スケ
ジュールを示す折線図、第2図は従来のパネルとファン
ネルの加熱封着工程の加熱温度スケジュールを示す折線
図、第3崗及び第4図は本発明の陰極線管の製造方法を
説明するための図であり、第3図は加熱炉内に有機物を
加熱分解したパネルとファンネル及び有機物を加熱分解
するパネルを入れた状態を示す説明図、第4図は加熱温
度スケジュールを示す折線図、第5図は本発明の他の実
施例に適用する加熱温度スケジュールを示す折巌図であ
る。 11・・・加熱炉 +2.・・・有機物を加熱分解したパネル122・・・
有機物を加熱分解するパネル13・・・フリットガラス
  14・・・ファンネル代理人 弁理士  井 上 
−男
Figure 1 is a line diagram showing the heating 6% degree schedule for the conventional thermal decomposition process of organic matter, Figure 2 is a line diagram showing the heating temperature schedule for the conventional heat sealing process of panels and funnels, Figure 3 is a line diagram showing the heating temperature schedule for the conventional heat sealing process of panels and funnels Figure 4 is a diagram for explaining the method for manufacturing a cathode ray tube of the present invention, and Figure 3 is an explanation showing a state in which a panel and a funnel for thermally decomposing organic matter and a panel for thermally decomposing organic matter are placed in a heating furnace. 4 is a polygon diagram showing a heating temperature schedule, and FIG. 5 is a polygon diagram showing a heating temperature schedule applied to another embodiment of the present invention. 11... Heating furnace +2. ...Panel 122 where organic matter was thermally decomposed...
Panel 13 for thermally decomposing organic matter...Fritted glass 14...Funnel agent Patent attorney Inoue
-man

Claims (4)

【特許請求の範囲】[Claims] (1)  パネルの内面に塗布された有機物の加熱分解
工程及び前記有機物の加熱分解されたパネルとファンネ
ルとをフリットガラスの加熱結晶化により封着する加熱
封着工程とを同一の加熱炉で同一の加熱温度スケジュー
ルで行なうことを特徴とする陰極線管の製造方法。
(1) The process of thermally decomposing the organic substance applied to the inner surface of the panel and the process of sealing the funnel with the thermally decomposed organic substance by heating and crystallizing the frit glass are carried out in the same heating furnace. A method for manufacturing a cathode ray tube, characterized in that the manufacturing method is performed according to a heating temperature schedule of:
(2)加熱温度スケジュールが常温から330°C乃至
370°Cまで6℃/分以下の昇温速度、330℃乃至
370°Cから430°C乃至445℃まで7℃/分以
上の昇温速度であることを特徴とする特許請求の範囲第
1項記載の陰極線管の製造方法。
(2) The heating temperature schedule is a heating rate of 6°C/min or less from room temperature to 330°C to 370°C, and a heating rate of 7°C/min or more from 330°C to 370°C to 430°C to 445°C. A method for manufacturing a cathode ray tube according to claim 1, characterized in that:
(3)加熱温度スケジュールが常温から330℃乃37
0°Cまで6〜b 370°Cで10分以上保持し、その後430°C乃至
445°Cまで7°C/分以上の昇温速度であることを
特徴とする特許請求の範囲第1項記載の陰極線管の製造
方法。
(3) Heating temperature schedule ranges from room temperature to 330°C to 37°C
Claim 1, characterized in that the temperature is maintained at 6 to 370°C for 10 minutes or more to 0°C, and then the heating rate is 7°C/min or more from 430°C to 445°C. A method of manufacturing the cathode ray tube described above.
(4)加熱炉が外部から0.5〜10m/ secの風
速の空気が送入できるようになされていることを特徴と
する特許請求の範囲第1項記載の陰極線管の製造方法。
(4) The method for manufacturing a cathode ray tube according to claim 1, wherein the heating furnace is configured such that air can be introduced from the outside at a wind speed of 0.5 to 10 m/sec.
JP11612482A 1982-07-06 1982-07-06 Production method of crt Pending JPS598241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11612482A JPS598241A (en) 1982-07-06 1982-07-06 Production method of crt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11612482A JPS598241A (en) 1982-07-06 1982-07-06 Production method of crt

Publications (1)

Publication Number Publication Date
JPS598241A true JPS598241A (en) 1984-01-17

Family

ID=14679289

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11612482A Pending JPS598241A (en) 1982-07-06 1982-07-06 Production method of crt

Country Status (1)

Country Link
JP (1) JPS598241A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52154338A (en) * 1976-06-18 1977-12-22 Hitachi Ltd Method and apparatus for color picture tube manufacture
JPS5357743A (en) * 1976-11-04 1978-05-25 Hitachi Ltd Manufacture of cathode-ray tube
JPS56149745A (en) * 1980-04-22 1981-11-19 Toshiba Corp Manufacturing method for cathode-ray tube
JPS56162451A (en) * 1980-05-19 1981-12-14 Hitachi Ltd Manufacture of color-picture tube and its device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52154338A (en) * 1976-06-18 1977-12-22 Hitachi Ltd Method and apparatus for color picture tube manufacture
JPS5357743A (en) * 1976-11-04 1978-05-25 Hitachi Ltd Manufacture of cathode-ray tube
JPS56149745A (en) * 1980-04-22 1981-11-19 Toshiba Corp Manufacturing method for cathode-ray tube
JPS56162451A (en) * 1980-05-19 1981-12-14 Hitachi Ltd Manufacture of color-picture tube and its device

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