JPH0234133B2 - - Google Patents
Info
- Publication number
- JPH0234133B2 JPH0234133B2 JP56107904A JP10790481A JPH0234133B2 JP H0234133 B2 JPH0234133 B2 JP H0234133B2 JP 56107904 A JP56107904 A JP 56107904A JP 10790481 A JP10790481 A JP 10790481A JP H0234133 B2 JPH0234133 B2 JP H0234133B2
- Authority
- JP
- Japan
- Prior art keywords
- annular body
- picture tube
- maximum diameter
- peripheral surface
- tube body
- 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.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 7
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
【発明の詳細な説明】
本発明は、受像管本体とその最大径部の外周面
に焼き嵌めされた金属環体とからなる防爆形受像
管の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an explosion-proof picture tube comprising a picture tube body and a metal ring shrink-fitted to the outer peripheral surface of the largest diameter portion of the picture tube body.
従来、受像管本体の最大径部の外周面に金属環
体を焼き嵌めして防爆構造となすことが行なわれ
ており、かかる防爆構造を有する受像管は、外部
から強い衝撃を受けても容易に破裂しない利点を
備える。あらかじめ環状に形成された金属環体を
受像管本体の最大径部に焼き嵌める方式は、受像
管本体の最大径部に巻きつけて締めつけるいわゆ
るテンシヨンバンド方式に比して量産性に富むば
かりでなく、強力にしてしかも均等な締付力を受
像管本体に与えることができる。また、金属環体
の四隅に受像管支持用突耳金具を正確な位置にあ
らかじめ付設しておくことができるという利点が
ある。 Conventionally, a metal ring was shrink-fitted to the outer circumferential surface of the largest diameter part of the picture tube body to create an explosion-proof structure. It has the advantage of not bursting. The method of shrink-fitting a pre-formed metal ring into the largest diameter part of the picture tube body is much easier to mass produce than the so-called tension band method, which wraps and tightens the metal ring around the largest diameter part of the picture tube body. Therefore, a strong and uniform tightening force can be applied to the picture tube body. Another advantage is that the projecting ear fittings for supporting the picture tube can be attached in advance to the four corners of the metal ring at accurate positions.
従来の、高抗張力の鋼板たとえば80Kg／mm2から
なる金属帯で受像管本体の最大径部の外周面を締
めつけて、金属帯の巻き始め部端と巻き終り部端
とを互に溶接又はクランプして固定する補強方式
には、次のようないくつかの欠点があつた。すな
わち、受像管締付用金属帯は、通常軟鋼の約４倍
から５倍の高抗張力を有しているため、容易に変
形せず、大きな力をもつて受像管を締めつけても
受像管外形に相似した形状にそつて変形せず、締
付力が不安定であり、また、その締めつけ後、金
属帯の始端部と終端部との溶接の際に溶接のため
の電極が受像管と金属帯との間に入り、溶接終了
後にこの電極を抜き取るので、金属帯がこの隙間
分だけゆるむことになり、十分な締めつけができ
なく、また締付力のばらつきの原因になつてい
る。これらのことはこの補強システムの重大な欠
陥につながつている。また、受像管の固定用金具
は受像管と上記金属帯との間にはさみ込んで固定
されるので、この固定用金具の位置を正確に規正
できず、その位置のばらつきが大きいので、受像
管をテレビジヨン受像機用シヤーシなどに自動機
械により取りつけることが困難であつた。 A conventional metal band made of a high tensile strength steel plate, for example 80 kg/mm 2 , is tightened around the outer circumferential surface of the largest diameter part of the picture tube body, and the ends of the metal band at the beginning and end of the winding are welded or clamped together. The reinforcing method of fixing the structure in place had several drawbacks, including the following: In other words, the metal band for tightening the picture tube has a tensile strength about 4 to 5 times that of normal mild steel, so it does not deform easily, and even if the picture tube is tightened with great force, it will not change the picture tube's external shape. The clamping force is unstable because it does not deform along the shape similar to that of the picture tube, and the clamping force is unstable. Since the electrode is inserted between the metal band and the metal band and removed after welding is completed, the metal band loosens by this gap, making it impossible to tighten it sufficiently and causing variations in the tightening force. These factors lead to serious deficiencies in this reinforcement system. In addition, since the metal fittings for fixing the picture tube are sandwiched between the picture tube and the above-mentioned metal band, the position of the fixing metal fittings cannot be accurately regulated, and the position varies widely. It was difficult to attach it to a chassis for a television receiver using an automatic machine.
本発明の防爆形受像管の製造方法によると、低
降伏点たとえば23Kg／mm2の鋼板からなる金属バン
ドをその両端縁同士で結合して環状体となしたの
ち、この環状体に二次元的な成形を施してバンド
の周長を正確に定め、受像管本体の最大径部外周
面形状にきわめて近似した内周面形状の矩形環状
体を得る。そして、この環状体を加熱伸長させて
その中へ受像管本体の最大径部を挿入し、次いで
前記環状体を急速に冷却する。 According to the method for manufacturing an explosion-proof picture tube of the present invention, a metal band made of a steel plate with a low yield point of, for example, 23 kg/mm 2 is joined at both ends to form a ring-shaped body, and then a two-dimensional A rectangular annular body having an inner circumferential shape very similar to the outer circumferential shape of the maximum diameter portion of the picture tube body is obtained by accurately determining the circumferential length of the band. This annular body is heated and expanded, the largest diameter portion of the picture tube body is inserted into it, and then the annular body is rapidly cooled.
このようにすると、冷却収縮の過程で受像管本
体の最大径部外周面に圧接する前記環状体が、前
記外周面の形状に適合した変形を自らなし、やつ
かいな三次元的なプレス成形加工を施すことなく
三次元的な成形を前記環状体に付与することがで
きる。 In this way, the annular body that comes into pressure contact with the outer circumferential surface of the maximum diameter part of the picture tube body in the process of cooling and shrinking deforms itself to match the shape of the outer circumferential surface, making it possible to perform difficult three-dimensional press forming. Three-dimensional shaping can be imparted to the annular body without the need for additional shaping.
つぎに、本発明の防爆形受像管の製造方法を図
に示した実施例とともに詳細に説明する。 Next, a method for manufacturing an explosion-proof picture tube according to the present invention will be described in detail with reference to embodiments shown in the drawings.
第１図において、第１および第２の割り型１，
２は略矩形状の金型３を形成しており、金型３の
外周面に巻きつけられた金属バンド４は、厚さ
0.4mm〜1.2mm、幅10mm〜30mmの低抗張力鋼板から
なり、コ字状の第１および第２の外枠５，６によ
つて金型３側へ押しつけられている。したがつ
て、この状態のもとで金属バンド４の両端縁の重
ね合わせ部を溶接棒７により溶接すると、金属バ
ンド４による所定大の環状体８が得られる。な
お、この環状体８は、第１および第２の外枠５，
６をそれぞれの支軸９，１０を支点にして回動さ
せ、かつ、第２の割り型２を第１の割り型１側へ
移動させることによつて、金型３からとり外すこ
とができる。 In FIG. 1, first and second split molds 1,
2 forms a substantially rectangular mold 3, and a metal band 4 wrapped around the outer peripheral surface of the mold 3 has a thickness of
It is made of a low tensile strength steel plate with a width of 0.4 mm to 1.2 mm and a width of 10 mm to 30 mm, and is pressed against the mold 3 side by U-shaped first and second outer frames 5 and 6. Therefore, if the overlapping portions of both ends of the metal band 4 are welded using the welding rod 7 under this condition, an annular body 8 of a predetermined size made of the metal band 4 can be obtained. Incidentally, this annular body 8 is connected to the first and second outer frames 5,
It can be removed from the mold 3 by rotating the molds 6 about their respective support shafts 9 and 10 and moving the second mold 2 toward the first mold 1. .
かかる環状体８は、次いで第２図に示すような
成型金型によつて二次元的に成形される。すなわ
ち、第１ないし第４の割り型１１，１２，１３，
１４からなる成形金型１５の外周面を囲繞するよ
うに置かれた前記環状体は、第１ないし第４の割
り型１１，１２，１３，１４が図示矢印の拡張方
向へ移動することにより、素材の降伏点を越えて
二次元的に塑性加工され、その内面形状は受像管
本体の最大径部における外周面形状とほぼ相似と
なる。 The annular body 8 is then two-dimensionally molded using a molding die as shown in FIG. That is, the first to fourth split molds 11, 12, 13,
When the first to fourth split molds 11, 12, 13, and 14 move in the expanding direction of the arrow shown in the figure, the annular body placed so as to surround the outer peripheral surface of the molding die 15 consisting of 14, The material is plastically worked two-dimensionally beyond its yield point, and its inner surface shape is approximately similar to the outer peripheral surface shape of the picture tube main body at its maximum diameter.
このときの環状体素材の残留伸びは、降伏点以
上（通常0.1％以上）であり、成形後環状体の内
周面長は、受像管本体最大径部（あらかじめ巻装
されたテープを含む）の外周面長よりも0.1〜0.5
％短かい。この環状体素材の残留伸びは降伏点以
下でも補強効果はあるが、この効果が残留伸び量
に比較して異なり、安定した品質を得ることがで
きない。なお、降伏を超した材料の伸びは、荷重
を取り除いても完全に零とならず、永久変形分が
残る。降伏現象は、よく焼鈍された純鉄では明瞭
に現われるが、実用される軟鋼やステンレス鋼で
は、おおむね0.1〜0.2％の伸びから降伏が始ま
る。この降伏点伸びは小さい方が残留伸びを小さ
くできるので望ましい。 At this time, the residual elongation of the annular body material is equal to or higher than the yield point (usually 0.1% or more), and the inner peripheral surface length of the annular body after molding is the maximum diameter part of the picture tube body (including the pre-wrapped tape). 0.1 to 0.5 than the outer circumferential length of
% short. Although the residual elongation of this annular body material has a reinforcing effect even below the yield point, this effect is different compared to the amount of residual elongation, and stable quality cannot be obtained. Note that the elongation of the material beyond yield does not completely go to zero even after the load is removed, and a permanent deformation remains. The yielding phenomenon clearly appears in well-annealed pure iron, but in practically used mild steel and stainless steel, yielding begins at approximately 0.1 to 0.2% elongation. It is preferable that the elongation at yield point is smaller because the residual elongation can be reduced.
成型金型１５によつて二次元的に成形されたほ
ぼ矩形の成形環状体１６は、成形金型１５から取
り出される前に、受像管支持用突耳金具１７，１
８，１９，２０が四隅に溶接される。この電気溶
接は、成形金型１５を一方の電極として行なわれ
るので、４個の突耳金具１７，１８，１９，２０
は、成形環状体１６の四隅にきわめて正確に取り
つけられる。 The approximately rectangular molded annular body 16 two-dimensionally molded by the molding die 15 is attached to the projecting ear fittings 17 and 1 for supporting the picture tube before being taken out from the molding die 15.
8, 19, and 20 are welded to the four corners. This electric welding is performed using the molding die 15 as one electrode, so the four ear fittings 17, 18, 19, 20
are attached to the four corners of the molded ring 16 with great precision.
成形金型１５から取り出された成形環状体１６
は、第３図および第４図に示すように焼き嵌め加
工台の４本の支柱２１，２２，２３，２４の平滑
な頂面上に、四隅の突耳金具１７，１８，１９，
２０を支持子として固定される。前記頂面にはこ
れより突出するピン２１ａ，２２ａ，２３ａ，２
４ａがあり、このピン２１ａ，２２ａ，２３ａ，
２４ａを挿通することによつて位置規正された突
耳金具１７，１８，１９，２０は、押え片２１
ｂ，２２ｂ，２３ｂ，２４ｂによりクランプされ
る。各押え片による押え力は５〜10Kgであり、こ
れにより所定位置に支持された成形環状体１６
は、その内側に配置されたガスバーナ２５によつ
て加熱される。そして、この加熱で成形環状体１
６が十分に伸長したとき、ガスバーナ２５を消火
して下降させるとともに、ガスバーナ２５に一体
に設けられた受像管保持台２６およびこの台２６
の所定位置に真空吸着により支持されている受像
本体２７を下降させ、第５図に示すように受像管
本体２７の最大径部たるフエースパネル部２８を
成形環状体１６内に挿入する。ただし、フエース
パネル部２８の外周面にはあらかじめ熱衝撃防止
用の接着テープ２９が巻装されている。また、保
持台２５上に真空吸着される受像管本体２７は、
所定位置に正しく位置していなければならないの
で、受像管本体のアラインメントポイント（カラ
ー受像管ガラスバルブのフエースパネルとフアン
ネルとに形成されている位置合せ用突起）等を基
準面として、治具等を用いて正確に位置規正され
ているものとする。 Molded annular body 16 taken out from molding die 15
As shown in FIGS. 3 and 4, the four corner ear fittings 17, 18, 19,
20 as a support. There are pins 21a, 22a, 23a, 2 protruding from the top surface.
4a, and these pins 21a, 22a, 23a,
The protruding ear fittings 17, 18, 19, 20, whose positions are regulated by inserting the holding pieces 24a,
It is clamped by b, 22b, 23b, and 24b. The pressing force of each pressing piece is 5 to 10 kg, which allows the molded annular body 16 to be supported in a predetermined position.
is heated by a gas burner 25 placed inside it. By this heating, the formed annular body 1
6 is fully extended, the gas burner 25 is extinguished and lowered, and the picture tube holding stand 26 provided integrally with the gas burner 25 and this stand 26 are
The image receiving body 27, which is supported by vacuum suction at a predetermined position, is lowered, and the face panel portion 28, which is the largest diameter portion of the picture tube body 27, is inserted into the molded annular body 16, as shown in FIG. However, an adhesive tape 29 for preventing thermal shock is wrapped around the outer peripheral surface of the face panel portion 28 in advance. In addition, the picture tube body 27 that is vacuum-adsorbed onto the holding table 25 is
Since it must be positioned correctly in the specified position, use the alignment point of the picture tube body (the alignment protrusion formed on the face panel and funnel of the color picture tube glass bulb) as a reference surface and use the jig etc. It is assumed that the position is accurately regulated using the
成形環状体１６を伸長させるための加熱温度
は、環状体の材質にもよるが、300〜800℃程度で
あり、軟鋼またはステンレス鋼の場合、400℃〜
650℃の範囲が適当である。加熱温度が高すぎる
と、環状体が焼鈍されて軟化し、所定の引つぱり
力に耐えられなくなり、十分な緊締力を受像管本
体に与えることができなくなる。 The heating temperature for elongating the formed annular body 16 depends on the material of the annular body, but is approximately 300 to 800°C, and in the case of mild steel or stainless steel, it is 400°C to
A range of 650°C is appropriate. If the heating temperature is too high, the annular body will be annealed and softened, and will no longer be able to withstand the predetermined pulling force, making it impossible to apply sufficient tightening force to the picture tube body.
フエースパネル部２８の外周面長が900mm以上
のものでは、熱膨脹係数100×10-7／℃〜120×
10-7／℃、引つ張り強さ18Kg／mm2〜36Kg／mm2の軟
鋼を用いることができ、外周面長が900mm以下の
小形管では、熱膨脹係数160×10-7／℃〜180×
10-7／℃、引つ張り強さ30Kg／mm2〜36Kg／mm2のス
テンレス鋼を用いることができる。 If the outer circumferential length of the face panel portion 28 is 900 mm or more, the coefficient of thermal expansion is 100×10 -7 /°C ~ 120×
10 -7 /℃, tensile strength of 18Kg/mm 2 - 36Kg/mm 2 can be used, and for small pipes with an outer circumferential surface length of 900mm or less, the coefficient of thermal expansion is 160 × 10 -7 /℃ - 180 ×
10 −7 /°C and a tensile strength of 30 Kg/mm 2 to 36 Kg/mm 2 can be used.
加熱伸長された成形環状体１６内へ受像管本体
２７のフエースパネル部２８を圧入したのち、こ
の圧入部に対してただちに空気流等を与え、成形
環状体１６を急冷する。第６図に示される冷却器
３０は、環状体１６側の面に多数の小ノズルを有
し、この小ノズルから噴射した空気によつて前記
圧入部が均等に冷却される。 After the face panel portion 28 of the picture tube body 27 is press-fitted into the heated and elongated molded annular body 16, an air flow or the like is immediately applied to the press-fitted portion to rapidly cool the molded annular body 16. The cooler 30 shown in FIG. 6 has a large number of small nozzles on the surface facing the annular body 16, and the press-fitting section is uniformly cooled by air injected from the small nozzles.
かくして焼き嵌めが完了し、受像管本体２７は
そのフエースパネル部２８を囲繞する環状体によ
つて緊締されることになる。焼き嵌め後の成形環
状体１６は永久変形しており、塑性加工されかつ
材料の降伏点で締付けていることになる。つま
り、二次加工された成形環状体１６は、受像管本
体２７の最大径部における外周面形状に適合して
自から変形し、結果的に三次元加工されたことに
なる。また、前記急冷は環状体に対してある程度
の焼き入れ効果を与えるので（たとえば23Kg／mm2
の軟鋼が32Kg／mm2になる）、環状体の機械的強度
が増大し、材料の使用量を抗張力の増加した分
（約40％）減らすことができる。 The shrink fitting is thus completed, and the picture tube main body 27 is tightened by the annular body surrounding the face panel portion 28 thereof. The molded annular body 16 after shrink fitting is permanently deformed, plastically worked, and tightened at the yield point of the material. In other words, the secondary-processed molded annular body 16 deforms itself to match the shape of the outer peripheral surface at the maximum diameter portion of the picture tube main body 27, resulting in three-dimensional processing. In addition, since the rapid cooling gives a certain degree of hardening effect to the annular body (for example, 23 kg/mm 2
The mechanical strength of the annular body increases and the amount of material used can be reduced by the increased tensile strength (approximately 40%).
図面は本発明の防爆形受像管の製造方法の一実
施例を示すもので、第１図は環状体形成工程にお
ける金型と金属バンドとの関係を示す平面図、第
２図は成形環状体形成工程における金型と環状体
と突耳金具との関係を示す平面図、第３図は加熱
工程における成形環状体とガスバーナと受像管保
持台との関係を示す側面図、第４図は同斜視図、
第５図は圧入工程における成形環状体と受像管本
体との関係を示す側断面図、第６図は冷却工程に
おける成形環状体と受像管本体と冷却器との関係
を示す平面図である。
３……金型、４……金属バンド、８……環状
体、１５……成形金型、１６……成型環状体、１
７〜２０……突耳金具、２５……ガスバーナ、２
７……受像管本体、３０……冷却器。
The drawings show an embodiment of the method for manufacturing an explosion-proof picture tube according to the present invention. FIG. 1 is a plan view showing the relationship between a mold and a metal band in the process of forming an annular body, and FIG. FIG. 3 is a plan view showing the relationship between the mold, the annular body, and the ear fitting in the forming process, FIG. 3 is a side view showing the relationship between the molding annular body, gas burner, and picture tube holder in the heating process, and FIG. Perspective view,
FIG. 5 is a side sectional view showing the relationship between the molded annular body and the picture tube body in the press-fitting process, and FIG. 6 is a plan view showing the relationship between the molded annular body, the picture tube body, and the cooler in the cooling process. 3... Mold, 4... Metal band, 8... Annular body, 15... Molding die, 16... Molding annular body, 1
7-20...Protruded ear fitting, 25...Gas burner, 2
7... Picture tube body, 30... Cooler.
Claims (1)
低抗張力鋼板からなる金属バンドを二次元的に成
形し、受像管本体の最大径部外周面形状に近似し
た内周面形状を有する矩形環状体を得る工程と、
前記成形のための金型上にある前記環状体の四隅
に受像管支持用突耳金具を固定する工程と、前記
突耳金具により四隅を固定された前記環状体を、
その内側に設けたバーナにより加熱伸長させる工
程と、前記バーナを下降させて前記環状体内に前
記受像管本体の最大径部を挿入する工程と、前記
環状体を急速に冷却収縮せしめ、前記最大径部外
周面を利用して前記環状体に三次元的成形を与え
る工程とを備えてなる防爆形受像管の製造方法。1 A metal band made of a low tensile strength steel plate with a tensile strength of 18 Kg/mm 2 to 36 Kg/mm 2 is two-dimensionally formed to create an inner peripheral surface shape that approximates the outer peripheral surface shape of the maximum diameter part of the picture tube body. obtaining a rectangular annular body having
a step of fixing projecting ear fittings for picture tube support to the four corners of the annular body on the mold for molding; and a step of fixing the annular body with the four corners fixed by the projecting ear fittings,
a step of heating and elongating with a burner provided inside the tube body, a step of lowering the burner to insert the maximum diameter part of the picture tube body into the annular body, and a step of rapidly cooling and shrinking the annular body so that the maximum diameter A method for manufacturing an explosion-proof picture tube, comprising the step of providing three-dimensional shaping to the annular body using the outer circumferential surface of the annular body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10790481A JPS5810348A (en) | 1981-07-09 | 1981-07-09 | Manufacture of explosion-proof picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10790481A JPS5810348A (en) | 1981-07-09 | 1981-07-09 | Manufacture of explosion-proof picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5810348A JPS5810348A (en) | 1983-01-20 |
| JPH0234133B2 true JPH0234133B2 (en) | 1990-08-01 |
Family
ID=14471008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10790481A Granted JPS5810348A (en) | 1981-07-09 | 1981-07-09 | Manufacture of explosion-proof picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5810348A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60151942A (en) * | 1984-01-19 | 1985-08-10 | Toshiba Corp | Explosionproof cathode-ray tube |
| JP2555060B2 (en) * | 1987-04-01 | 1996-11-20 | 株式会社日立製作所 | Explosion-proof CRT reinforcement device |
| US5036577A (en) * | 1989-11-30 | 1991-08-06 | Thomson Consumer Electronics, Inc. | Method of forming a shrink fit implosion protection band |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57132649A (en) * | 1981-02-10 | 1982-08-17 | Toshiba Corp | Manufacture of explosion-proof cathode-ray tube |
-
1981
- 1981-07-09 JP JP10790481A patent/JPS5810348A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57132649A (en) * | 1981-02-10 | 1982-08-17 | Toshiba Corp | Manufacture of explosion-proof cathode-ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5810348A (en) | 1983-01-20 |
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