EP0264116A2 - Shadow-mask picture tube - Google Patents

Shadow-mask picture tube Download PDF

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Publication number
EP0264116A2
EP0264116A2 EP87115003A EP87115003A EP0264116A2 EP 0264116 A2 EP0264116 A2 EP 0264116A2 EP 87115003 A EP87115003 A EP 87115003A EP 87115003 A EP87115003 A EP 87115003A EP 0264116 A2 EP0264116 A2 EP 0264116A2
Authority
EP
European Patent Office
Prior art keywords
picture tube
shadow mask
tube according
mask picture
holding plates
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.)
Granted
Application number
EP87115003A
Other languages
German (de)
French (fr)
Other versions
EP0264116A3 (en
EP0264116B1 (en
Inventor
Eberhard Nill
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.)
Panasonic Holdings Corp
Original Assignee
Nokia Unterhaltungselektronik Deutschland GmbH
Standard Elektrik Lorenz AG
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 Nokia Unterhaltungselektronik Deutschland GmbH, Standard Elektrik Lorenz AG filed Critical Nokia Unterhaltungselektronik Deutschland GmbH
Publication of EP0264116A2 publication Critical patent/EP0264116A2/en
Publication of EP0264116A3 publication Critical patent/EP0264116A3/en
Application granted granted Critical
Publication of EP0264116B1 publication Critical patent/EP0264116B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/073—Mounting arrangements associated with shadow masks

Definitions

  • the invention relates to a shadow mask picture tube with a square glass trough and a glass cone, which are connected to one another via molded-on outer flanges.
  • both the trough and the cone can consist of laminated glass.
  • the shadow mask must be fastened very precisely in the glass body of a shadow mask picture tube, so that the holes in the mask are arranged in exact optical correspondence with the phosphor dots on the screen and also remain during operation. To make matters worse, the mask has to be removed from the tub several times during the manufacturing process of a color picture tube and reinserted into it without the optical correspondence being allowed to suffer. To attach the mask, it was previously provided with a frame and hung up using springs, spring holders and pins.
  • the object of the invention is to simplify and cheapen a shadow mask picture tube and its production.
  • holding plates for the shadow mask are arranged in the picture tube in the region of the corners between the flanges, which are made of a material that has a thermal expansion coefficient matched to the glass material.
  • the shadow mask can be hung up in a simple but reliable and reproducible manner without a mask frame, spring and spring holder being required as before.
  • the invention is based on a glass trough and a glass cone, which are provided with outer flanges for connecting the two parts.
  • Fig. 1 a part of the tub 1 is shown seen from the inside.
  • the tub flange 3 has a recess 5 in the corner in which a holding plate 7 is fastened.
  • the holding plate 7 consists of a material which has a thermal expansion coefficient which is matched to the glass material of the trough.
  • the holding plate 7 is preferably made of ceramic material or an iron-nickel alloy. It is fastened in the recess 5 of the tub flange 3 by means of a suitable, heat-resistant adhesive or by means of a glass frit.
  • the holding plate 7 has a bore into which a fastening pin 9 engages and with which the edge 11 of the mask 10 is fastened to the holding plate 7.
  • edge 11 of the mask 10 is provided with corresponding holes, for example.
  • perforated plates can also be arranged on the mask corners, as described with reference to FIG. 3, reference numeral 14. These platelets can be made of any suitable material.
  • fastening means which allow the mask 10 to be replaced can be used.
  • Other fastening means such as e.g. Rivets, used.
  • FIG. 2 shows a longitudinal section through the trough with the cone attached along the section line AB from FIG. 1.
  • the holding plate 7 is fastened in the recess 5 of the tub flange 3 by means of a suitable fastening material 15, such as, for example, glass frit. It can be expedient, as shown in FIG. 2, to also provide the cone flange 4 with a corresponding recess 6.
  • the mask 10, which has a window at 12, is fastened in the bore 8 of the holding plate 7 by means of a fastening pin 9.
  • This fastening pin 9 can be designed as a tubular rivet or as a blind rivet.
  • the holding plate 7 can be used at the same time for fastening the shield 13.
  • the attachment shown in FIGS. 1 and 2 is provided at all four corners of the picture tube.
  • Doming compensation can be achieved in this holder in a simple manner in that the mask is connected to the holding plate via bimetallic plates.
  • Suitable bimetal plates 14 are attached to the edge 11 of the mask 10, for example by welding. These bimetallic plates are in turn connected to the holding plate 7 by means of the fastening pin 9.
  • the invention results in a significant simplification and cost reduction in the production of the shadow mask picture tube. Since this also results in a reduction in weight, it is particularly advantageous to use the invention in picture tubes whose trough and cone consist of laminated glass, since this results in an overall reduction in weight of the picture tube by approximately 40%.

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  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

Schattenmasken-Bildröhre mit einer Glaswanne und einem Glaskonus, die über angeformte Außenflansche miteinander verbunden sind. Zur Halterung der Schattenmaske (10) sind zwischen den Flanschen, vorzugsweise in inneren Ausnehmungen der Flansche, Halteplatten (7) befestigt, in deren Bohrung Nieten (9) angeordnet sind, welche die Maske (10) und ggf. die Innenabschirmung halten. Vorzugsweise ist die Maske (10) über Bimetallplättchen mit den Halteplatten (7) verbunden. Hierdurch ergibt sich eine einfache und billige Befestigung für Maske und Abschirmung in der Bildröhre.Shadow mask picture tube with a glass trough and a glass cone, which are connected to each other via molded outer flanges. To hold the shadow mask (10), holding plates (7) are fastened between the flanges, preferably in inner recesses of the flanges, in the bore of which rivets (9) are arranged, which hold the mask (10) and possibly the inner shield. The mask (10) is preferably connected to the holding plates (7) via bimetal plates. This results in a simple and cheap attachment for mask and shield in the picture tube.

Description

Die Erfindung bezieht sich auf eine Schattenmasken-­Bildröhre mit einer viereckigen Glaswanne und einem Glaskonus, die über angeformte Außenflansche miteinander verbunden sind.The invention relates to a shadow mask picture tube with a square glass trough and a glass cone, which are connected to one another via molded-on outer flanges.

Der Glaskörper für eine solche Bildröhre ist aus der US-PS 43 483 452 bekannt. Bei dieser bekannten Ausführungsform können sowohl die Wanne als auch der Konus aus Schichtglas bestehen.The glass body for such a picture tube is known from US-PS 43 483 452. In this known embodiment, both the trough and the cone can consist of laminated glass.

In dem Glaskörper einer Schattenmasken-Bildröhre muß die Schattenmaske sehr präzise befestigt sein, so daß die Löcher in der Maske in genauer optischer Übereinstimmung mit den Leuchtstoffpunkten auf dem Bildschirm angeordnet sind und auch während des Betriebes bleiben. Erschwerend kommt noch hinzu, daß während des Fertigungsganges einer Farbbildröhre die Maske mehrmals aus der Wanne entfernt und in diese wieder eingesetzt werden muß, ohne daß die optische Übereinstimmung darunter leiden darf. Zur Befestigung der Maske wurde diese bisher mit einem Rahmen versehen und mit Hilfe von Federn, Federhaltern und Pins aufgehängt.The shadow mask must be fastened very precisely in the glass body of a shadow mask picture tube, so that the holes in the mask are arranged in exact optical correspondence with the phosphor dots on the screen and also remain during operation. To make matters worse, the mask has to be removed from the tub several times during the manufacturing process of a color picture tube and reinserted into it without the optical correspondence being allowed to suffer. To attach the mask, it was previously provided with a frame and hung up using springs, spring holders and pins.

Aufgabe der Erfindung ist es, eine Schattenmasken-­Bildröhre und deren Fertigung zu vereinfachen und zu verbilligen.The object of the invention is to simplify and cheapen a shadow mask picture tube and its production.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 angegebenen Maßnahmen gelöst.This object is achieved by the measures specified in the characterizing part of claim 1.

Vorteilhafte Weiterbildungen der Erfindung können den Unteransprüchen entnommen werden.Advantageous developments of the invention can be found in the subclaims.

Gemäß der Erfindung werden in der Bildröhre im Bereich der Ecken zwischen den Flanschen Halteplatten für die Schattenmaske angeordnet, die aus einem Material bestehen, das einen an das Glasmaterial angepaßten thermischen Ausdehnungskoeffizienten hat.According to the invention, holding plates for the shadow mask are arranged in the picture tube in the region of the corners between the flanges, which are made of a material that has a thermal expansion coefficient matched to the glass material.

Mittels solcher Halteplatten kann die Schattenmaske in einfacher Weise aber zuverlässig und gut reproduzierbar aufgehängt werden, ohne daß wie bisher ein Maskenrahmen, Feder und Federhalter erforderlich sind.By means of such holding plates, the shadow mask can be hung up in a simple but reliable and reproducible manner without a mask frame, spring and spring holder being required as before.

Ein bevorzugtes Ausführungsbeispiel der Erfindung soll anhand der Fig. beschrieben werden.

  • Fig. 1 zeigt in Draufsicht einen Teil der Wanne von innen.
  • Fig. 2 zeigt die Wanne mit aufgesetztem Konus im Längsschnitt, und zwar längs der Schnittlinie A-B von Fig. 1.
  • Fig. 3 zeigt eine weitere Ausführungsform für die Befestigung einer Ecke der Maske an einer Halteplatte.
A preferred embodiment of the invention will be described with reference to the figure.
  • Fig. 1 shows a top view of part of the tub from the inside.
  • FIG. 2 shows the tub with the cone attached in longitudinal section, specifically along the section line AB from FIG. 1.
  • Fig. 3 shows a further embodiment for the attachment of a corner of the mask to a holding plate.

Die Erfindung geht aus von einer Glaswanne und einem Glaskonus, welche mit Außenflanschen zum Verbinden der beiden Teile versehen sind.The invention is based on a glass trough and a glass cone, which are provided with outer flanges for connecting the two parts.

In Fig. 1 ist ein Teil der Wanne 1 von der Innenseite gesehen dargestellt. Der Wannenflansch 3 hat an der Ecke eine Ausnehmung 5, in welcher eine Halteplatte 7 befestigt ist. Die Halteplatte 7 besteht aus einem Material, das einen dem Glasmaterial der Wanne angepaßten thermischen Ausdehnungskoeffizienten hat. Die Halteplatte 7 besteht vorzugsweise aus keramischem Material oder aus einer Eisen-Nickel-Legierung. Sie ist in der Ausnehmung 5 des Wannenflansches 3 mittels eines geeigneten, wärmebeständigen Klebemittels oder mittels einer Glasfritte befestigt. Die Halteplatte 7 hat eine Bohrung, in die ein Befestigungsstift 9 eingreift und mit dem der Rand 11 der Maske 10 an der Halteplatte 7 befestigt ist.In Fig. 1 a part of the tub 1 is shown seen from the inside. The tub flange 3 has a recess 5 in the corner in which a holding plate 7 is fastened. The holding plate 7 consists of a material which has a thermal expansion coefficient which is matched to the glass material of the trough. The holding plate 7 is preferably made of ceramic material or an iron-nickel alloy. It is fastened in the recess 5 of the tub flange 3 by means of a suitable, heat-resistant adhesive or by means of a glass frit. The holding plate 7 has a bore into which a fastening pin 9 engages and with which the edge 11 of the mask 10 is fastened to the holding plate 7.

Der Rand 11 der Maske 10 ist hierzu beispielsweise mit entsprechenden Löchern versehen. Stattdessen können aber auch an den Maskenecken gelochte Plättchen angeordnet sein, wie sie anhand von Fig. 3, Bezugszeichen 14, beschrieben werden. Diese Plättchen können aus einem beliebigen geeigneten Material bestehen.For this purpose, the edge 11 of the mask 10 is provided with corresponding holes, for example. Instead, perforated plates can also be arranged on the mask corners, as described with reference to FIG. 3, reference numeral 14. These platelets can be made of any suitable material.

Es soll auch darauf hingewiesen werden, daß während des Herstellungsvorganges der Bildröhre, bei dem die Maske 10 mehrmals aus der Wanne 1 entfernt und wieder in diese eingesetzt werden muß, nur Befestigungsmittel verwendet werden können, die ein Auswechseln der Maske 10 gestatten. Zur endgültigen Befestigung der Maske 10 können dann andere Befestigungsmittel 9, wie z.B. Nieten, verwendet werden.It should also be pointed out that during the production process of the picture tube, in which the mask 10 has to be removed several times from the trough 1 and reinserted into it, only fastening means which allow the mask 10 to be replaced can be used. Other fastening means 9, such as e.g. Rivets, used.

Fig. 2 zeigt einen Längssschnitt durch die Wanne mit aufgesetztem Konus längs der Schnittlinie A-B von Fig. 1.FIG. 2 shows a longitudinal section through the trough with the cone attached along the section line AB from FIG. 1.

Der Wannenflansch 3, der an die Wanne 1 angeformt ist, und der Konusflansch 4, der an den Konus 2 angeformt ist, dienen zur Verbindung von Wanne und Konus miteinander. Die Halteplatte 7 ist mittels eines geeigneten Befestigungsmaterials 15, wie beispielsweise Glasfritte, in der Ausnehmung 5 des Wannenflansches 3 befestigt. Es kann zweckmäßig sein, wie in Fig. 2 dargestellt, auch den Konusflansch 4 mit einer korrespondierenden Ausnehmung 6 zu versehen. Die Maske 10, die bei 12 ein Fenster besitzt, ist mittels eines Befestigungsstiftes 9 in der Bohrung 8 der Halteplatte 7 befestigt. Dieser Befestigungsstift 9 kann als Rohrniet oder als Blindniet ausgebildet sein. Die Halteplatte 7 kann gleichzeitig zur Befestigung der Abschirmung 13 benutzt werden.The tub flange 3, which is molded onto the tub 1, and the cone flange 4, which is molded onto the cone 2, serve to connect the tub and the cone to one another. The holding plate 7 is fastened in the recess 5 of the tub flange 3 by means of a suitable fastening material 15, such as, for example, glass frit. It can be expedient, as shown in FIG. 2, to also provide the cone flange 4 with a corresponding recess 6. The mask 10, which has a window at 12, is fastened in the bore 8 of the holding plate 7 by means of a fastening pin 9. This fastening pin 9 can be designed as a tubular rivet or as a blind rivet. The holding plate 7 can be used at the same time for fastening the shield 13.

Die in den Fig. 1 und 2 dargestellt Befestigung ist an allen vier Ecken der Bildröhre vorgesehen.The attachment shown in FIGS. 1 and 2 is provided at all four corners of the picture tube.

Eine Doming-Kompensation kann bei dieser Halterung in einfacher Weise dadurch erzielt werden, daß die Maske über Bimetallplättchen mit der Halteplatte verbunden ist. Eine solche Anordnung ist in Fig. 3 dargestellt. An dem Rand 11 der Maske 10 sind geeignete Bimetallplättchen 14, beispielsweise durch Schweißen, befestigt. Diese Bimetallplättchen sind ihrerseits mittels des Befestigungsstiftes 9 mit der Halteplatte 7 verbunden.Doming compensation can be achieved in this holder in a simple manner in that the mask is connected to the holding plate via bimetallic plates. Such an arrangement is shown in FIG. 3. Suitable bimetal plates 14 are attached to the edge 11 of the mask 10, for example by welding. These bimetallic plates are in turn connected to the holding plate 7 by means of the fastening pin 9.

Durch die Erfindung ergibt sich eine wesentliche Vereinfachung und Verbilligung bei der Herstellung der Schattenmasken-Bildröhre. Da sich hierbei auch eine Gewichtsverminderung ergibt, ist es besonders vorteilhaft, die Erfindung bei Bildröhren zu verwenden, deren Wanne und Konus aus Schichtglas bestehen, da sich dabei insgesamt eine Gewichtsverminderung der Bildröhre um etwa 40 % ergibt.The invention results in a significant simplification and cost reduction in the production of the shadow mask picture tube. Since this also results in a reduction in weight, it is particularly advantageous to use the invention in picture tubes whose trough and cone consist of laminated glass, since this results in an overall reduction in weight of the picture tube by approximately 40%.

Claims (13)

1. Schattenmasken-Bildröhre mit einer viereckigen Glaswanne und einem Glaskonus, die über angeformte Außenflansche miteinander verbunden sind, dadurch gekennzeichnet, daß zur Halterung der Schattenmaske (10)innen im Bereich der Ecken zwischen den Flanschen (3,4)Halteplatten (7) auf einem Material mit an das Glasmaterial angepaßtem thermischen Ausdehnungskoeffizienten befestigt sind.1. shadow mask picture tube with a square glass trough and a glass cone, which are connected to each other via molded outer flanges, characterized in that for holding the shadow mask (10) inside in the region of the corners between the flanges (3,4) holding plates (7) a material with a thermal expansion coefficient adapted to the glass material. 2. Schattenmasken-Bildröhre nach Anspruch 1, dadurch gekennzeichnet, daß die Halteplatten (7) durch Kleben befestigt sind.2. Shadow mask picture tube according to claim 1, characterized in that the holding plates (7) are fixed by gluing. 3. Schattenmasken-Bildröhre nach Anspruch 1, dadurch gekennzeichnet, daß die Halteplatten (7) durch Fritten befestigt sind.3. shadow mask picture tube according to claim 1, characterized in that the holding plates (7) are fixed by frits. 4. Schattenmasken-Bildröhre nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Halteplatten (7) in Innenausnehmungen (5) des Wannenflansches (3) befestigt sind.4. Shadow mask picture tube according to one of claims 1 to 3, characterized in that the holding plates (7) in inner recesses (5) of the tub flange (3) are attached. 5. Schattenmasken-Bildröhre nach Anspruch 4, dadurch gekennzeichnet, daß der Konusflansch (4) den Innenausnehmungen (5) des Wannenflansches (3) entsprechende Innenausnehmungen (6) hat.5. shadow mask picture tube according to claim 4, characterized in that the conical flange (4) has the inner recesses (5) of the trough flange (3) corresponding inner recesses (6). 6. Schattenmasken-Bildröhre nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Halteplatten (7) aus keramischem Material bestehen.6. Shadow mask picture tube according to one of claims 1 to 5, characterized in that the holding plates (7) consist of ceramic material. 7. Schattenmasken-Bildröhre nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Halteplatten (7) aus einer Eisen-Nickel-Legierung bestehen.7. shadow mask picture tube according to one of claims 1 to 5, characterized in that the holding plates (7) consist of an iron-nickel alloy. 8. Schattenmasken-Bildröhre nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Halteplatten (7) Bohrungen (8) haben und die Maske (10) mit in die Bohrungen (8) eingreifenden Stiften (9) an den Halteplatten (7) befestigt ist.8. shadow mask picture tube according to one of claims 1 to 7, characterized in that the holding plates (7) have bores (8) and the mask (10) with in the bores (8) engaging pins (9) on the holding plates (7 ) is attached. 9. Schattenmasken-Bildröhre nach Anspruch 8, dadurch gekennzeichnet, daß die Befestigungsstifte (9) Rohrniete sind.9. shadow mask picture tube according to claim 8, characterized in that the fastening pins (9) are tubular rivets. 10. Schattenmasken-Bildröhre nach Anspruch 8, dadurch gekennzeichnet, daß die Befestigungsstifte (9) Blindniete sind.10. shadow mask picture tube according to claim 8, characterized in that the fastening pins (9) are blind rivets. 11. Schattenmasken-Bildröhre nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Maske (10) über an deren Rand (11) angeordnete Bimetallplättchen (14) mit den Halteplatten (7) verbunden sind.11. Shadow mask picture tube according to one of claims 1 to 10, characterized in that the mask (10) via the edge (11) arranged bimetallic plates (14) are connected to the holding plates (7). 12. Schattenmasken-Bildröhre nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß zusätzlich die Innenabschirmung (13) an den Halteplatten (7) befestigt ist.12. Shadow mask picture tube according to one of claims 1 to 11, characterized in that in addition the inner shield (13) is attached to the holding plates (7). 13. Schattenmasken-Bildröhre nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Wanne (1) und Konus (2) aus Schichtglas bestehen.13. Shadow mask picture tube according to one of claims 1 to 12, characterized in that the trough (1) and cone (2) consist of laminated glass.
EP87115003A 1986-10-16 1987-10-14 Shadow-mask picture tube Expired - Lifetime EP0264116B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3635187 1986-10-16
DE19863635187 DE3635187A1 (en) 1986-10-16 1986-10-16 SHADOW MASK PIPES

Publications (3)

Publication Number Publication Date
EP0264116A2 true EP0264116A2 (en) 1988-04-20
EP0264116A3 EP0264116A3 (en) 1988-11-30
EP0264116B1 EP0264116B1 (en) 1990-09-19

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ID=6311816

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EP87115003A Expired - Lifetime EP0264116B1 (en) 1986-10-16 1987-10-14 Shadow-mask picture tube

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US (1) US4806819A (en)
EP (1) EP0264116B1 (en)
JP (1) JPS63105435A (en)
CA (1) CA1277362C (en)
DE (2) DE3635187A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991006970A1 (en) * 1989-10-25 1991-05-16 Zenith Electronics Corporation Segmented shadow mask support structure and process for flat tension mask color cathode ray tubes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000067079A1 (en) * 1999-04-28 2000-11-09 Citizen Watch Co., Ltd. Electronic clock and method of controlling the clock

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925189A (en) * 1953-10-02 1960-02-16 Corning Glass Works Cathode-ray tube manufacture
FR1567681A (en) * 1967-06-02 1969-05-16
JPS52152157A (en) * 1976-06-14 1977-12-17 Toshiba Corp Cathode-ray tube
EP0113488A1 (en) * 1983-01-07 1984-07-18 Philips Electronics Uk Limited Cathode-ray tube
US4483452A (en) * 1981-12-07 1984-11-20 Corning Glass Works Television bulb
US4593225A (en) * 1984-08-31 1986-06-03 Zenith Electronics Corporation Tension mask colar cathode ray tube

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873874A (en) * 1974-02-20 1975-03-25 Gte Sylvania Inc Shield attached by sealing to panel sidewall of cathode ray tube
JPS5941793B2 (en) * 1979-09-10 1984-10-09 凸版印刷株式会社 Decorative board manufacturing method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925189A (en) * 1953-10-02 1960-02-16 Corning Glass Works Cathode-ray tube manufacture
FR1567681A (en) * 1967-06-02 1969-05-16
JPS52152157A (en) * 1976-06-14 1977-12-17 Toshiba Corp Cathode-ray tube
US4483452A (en) * 1981-12-07 1984-11-20 Corning Glass Works Television bulb
EP0113488A1 (en) * 1983-01-07 1984-07-18 Philips Electronics Uk Limited Cathode-ray tube
US4593225A (en) * 1984-08-31 1986-06-03 Zenith Electronics Corporation Tension mask colar cathode ray tube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 2, Nr. 32 (E-77), 28 Februar 1978, Seite 12272 E 77; & JP-A-52 152 157 (TOKYO SHIBAURA DENKI K.K.) 17-12-1977 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991006970A1 (en) * 1989-10-25 1991-05-16 Zenith Electronics Corporation Segmented shadow mask support structure and process for flat tension mask color cathode ray tubes

Also Published As

Publication number Publication date
JPS63105435A (en) 1988-05-10
JPH05811B2 (en) 1993-01-06
US4806819A (en) 1989-02-21
DE3635187A1 (en) 1988-04-21
DE3765075D1 (en) 1990-10-25
EP0264116A3 (en) 1988-11-30
CA1277362C (en) 1990-12-04
EP0264116B1 (en) 1990-09-19

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