US3818557A - Method of manufacturing an implosion-free picture tube for television display - Google Patents

Method of manufacturing an implosion-free picture tube for television display Download PDF

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Publication number
US3818557A
US3818557A US00214788A US21478872A US3818557A US 3818557 A US3818557 A US 3818557A US 00214788 A US00214788 A US 00214788A US 21478872 A US21478872 A US 21478872A US 3818557 A US3818557 A US 3818557A
Authority
US
United States
Prior art keywords
adhesive
adhesive tape
tube
reinforced
clamping band
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
Application number
US00214788A
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English (en)
Inventor
T Doreleijers
R Eisses
H Bongenaar
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.)
US Philips Corp
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Priority to US455713A priority Critical patent/US3912105A/en
Application granted granted Critical
Publication of US3818557A publication Critical patent/US3818557A/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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers

Definitions

  • the invention relates to a method of manufacturing an implosion-free picture tube for television display in which after evacuation of the tube the widest part of the tube is first covered with a layer of adhesive across which a clamping band is provided.
  • the invention furthermore relates to a picture tube manufactured by said method.
  • German Utility Model 1,853,691 It is also known from German Utility Model 1,853,691 to provide an adhesive tape around an envelope and to clamp around it a band for connection of the tube in a cabinet.
  • this embodiment could not provide any freedom from implosion, since the clamping band had not been provided for this purpose.
  • any space between the clamping band and the layer of adhesive tape for example a gap between the edge of the clamping band facing the cone and the layer of adhesive tape, need not be filled since the adhesive tape which is preferably reinforced with a fabric and readily adheres to the envelope due to its adhesive force, forms a girdle around the envelope and thereby itself slightly acts as an anti-implosion band.
  • the splintered glass of the envelope is also held by the strong adhesive action of the adhesive tape.
  • the fabric increases the friction between the clamping band and the envelope to such an extent that roughening of the band or of the glass of the envelope is no longer necessary to prevent the sliding off of the clamping band from the envelope.
  • FIG. 1 is a cross-sectional view of a part of a tube provided with a clamping band and an adhesive layer while FIG. 2 is a cross-sectional view of a clamping band reinforced with fabric.
  • reference numeral 1 denotes the glass wall of the widest part of an envelope of a picture tube.
  • Reference numeral 2 denotes the window on the inside of which a phosphor screen 3 is provided.
  • a clamping band 6 is provided on the adhesive tape 5.
  • the adhesive tape 5 preferably consists of a not yet hardened synthetic resin and the clamping band 6 is provided around the layer of adhesive tape, preferably in the hot condition preferably within the temperature range of 400 to 450 centrigrade.
  • the synthetic resin will partly melt and harden before the clamping band has cooled.
  • the fabric 4 is clamped between the clamping band 6 andthe glass wall 1 and prevents the sliding off of the clamping band 6 as a result of the large friction. Roughening of the clamping band 6 or of the glass wall 1 therefore is not necessary.
  • the adhesive tape may also consist of non-hardening materials in which the problem of the sliding off is even larger since the material is still soft when the clamping band has cooled to such a tempera ture that a large pressure is already exerted on the wall of the tube.
  • the method according to the invention may be used in combination with substantially any known embodiment of clamping bands, if desirable also in combination with the use of a known layer on the cone of the tube which layer is reinforced by glass fibres.
  • a single clamping band several clamping bands may be provided on or beside each other and, if desirable, an intermediate band may be used.
  • the clamping band or an intermediate band may be wide so that it adjoins the surface 2 of the window.
  • the reinforcement embedded in the adhesive tape need not consist of glass fabric but may also consist of another suitable material, a suitable metal or a suitable metal alloy. Furthermore, a coarse-mesh fabric or an apertured plate may be used as a reinforcement, or
  • the band when using short fibres the band should be given an undesirably large thickness or the gap 7 would have to be filled.
  • a method of manufacturing an implosion-free picture tube comprising the steps of applying, after the evacuation of the tube, a reinforced adhesive tape on a peripheral sloped portion of the tube,

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Adhesive Tapes (AREA)
US00214788A 1971-01-08 1972-01-03 Method of manufacturing an implosion-free picture tube for television display Expired - Lifetime US3818557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US455713A US3912105A (en) 1971-01-08 1974-03-28 Implosion-free picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7100273A NL7100273A (en, 2012) 1971-01-08 1971-01-08

Publications (1)

Publication Number Publication Date
US3818557A true US3818557A (en) 1974-06-25

Family

ID=19812220

Family Applications (2)

Application Number Title Priority Date Filing Date
US00214788A Expired - Lifetime US3818557A (en) 1971-01-08 1972-01-03 Method of manufacturing an implosion-free picture tube for television display
US455713A Expired - Lifetime US3912105A (en) 1971-01-08 1974-03-28 Implosion-free picture tube

Family Applications After (1)

Application Number Title Priority Date Filing Date
US455713A Expired - Lifetime US3912105A (en) 1971-01-08 1974-03-28 Implosion-free picture tube

Country Status (11)

Country Link
US (2) US3818557A (en, 2012)
JP (1) JPS5634984B1 (en, 2012)
AU (1) AU3742971A (en, 2012)
BE (1) BE777786A (en, 2012)
CA (1) CA987724A (en, 2012)
DE (1) DE2162446A1 (en, 2012)
ES (2) ES398624A1 (en, 2012)
FR (1) FR2121663B1 (en, 2012)
GB (1) GB1359413A (en, 2012)
IT (1) IT946336B (en, 2012)
NL (1) NL7100273A (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904820A (en) * 1973-02-12 1975-09-09 Philips Corp Cathode-ray tube with implosion safety
US3912105A (en) * 1971-01-08 1975-10-14 Philips Corp Implosion-free picture tube
US5249059A (en) * 1991-12-05 1993-09-28 Samsung Electron Devices Co., Ltd. Cathode-ray tube having explosion proof band
US6282784B1 (en) * 1996-08-05 2001-09-04 Ascometal Method of assembling internal combustion engine connecting rod

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4550344A (en) * 1982-09-27 1985-10-29 North American Philips Consumer Electronics Corp. Cathode ray tube with composite mounting structure
US4544955A (en) * 1984-01-30 1985-10-01 General Electric Company Implosion resistant cathode ray tubes
US5246771A (en) * 1988-04-18 1993-09-21 Teraoka Seisakusho Co., Ltd. Adhesive tape for preventing implosion and removing electrostatic charge
JP2001098234A (ja) 1999-09-29 2001-04-10 Nitto Denko Corp ブラウン管の防爆テープ及びその防爆構造

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785820A (en) * 1952-06-28 1957-03-19 Owens Illinois Glass Co Controlling implosions in cathode ray and other tubes
US3162933A (en) * 1963-04-12 1964-12-29 Rca Corp Method of processing cathode ray tubes
US3220593A (en) * 1962-03-19 1965-11-30 Owens Illinois Glass Co Cathode-ray and other vacuumized tubes resistant to fracture and capable of controlled devacuation
US3403805A (en) * 1966-05-31 1968-10-01 Owens Illinois Inc Cathode-ray and other vacuumized tubes resistant to violent devacuation
US3456076A (en) * 1964-11-24 1969-07-15 Westinghouse Electric Corp Implosion protection for cathode ray tubes
US3508310A (en) * 1967-07-08 1970-04-28 Philips Corp Method of manufacturing an implosion-free television display tube

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149019A (en) * 1955-12-15 1964-09-15 Minnesota Mining & Mfg Flexible resinous insulating sheet structure
US3260397A (en) * 1961-02-24 1966-07-12 Philips Corp Cathode ray tube and method of making same
US3647960A (en) * 1969-01-06 1972-03-07 Hitachi Ltd Implosion-proof cathode-ray tube and method of making same
US3593874A (en) * 1969-04-23 1971-07-20 Owens Illinois Inc Resistant cathode-ray tube
US3605227A (en) * 1969-05-19 1971-09-20 Philips Corp Method of manufacturing an implosion-free display tube
US3626093A (en) * 1969-10-15 1971-12-07 Thorn Radio Valves And Tubes L Implosion-resistant cathode-ray tubes
NL7100273A (en, 2012) * 1971-01-08 1972-07-11

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785820A (en) * 1952-06-28 1957-03-19 Owens Illinois Glass Co Controlling implosions in cathode ray and other tubes
US3220593A (en) * 1962-03-19 1965-11-30 Owens Illinois Glass Co Cathode-ray and other vacuumized tubes resistant to fracture and capable of controlled devacuation
US3220592A (en) * 1962-03-19 1965-11-30 Owens Illinois Glass Co Cathode-ray and other vacuumized tubes resistant to violent devacuation
US3162933A (en) * 1963-04-12 1964-12-29 Rca Corp Method of processing cathode ray tubes
US3456076A (en) * 1964-11-24 1969-07-15 Westinghouse Electric Corp Implosion protection for cathode ray tubes
US3403805A (en) * 1966-05-31 1968-10-01 Owens Illinois Inc Cathode-ray and other vacuumized tubes resistant to violent devacuation
US3508310A (en) * 1967-07-08 1970-04-28 Philips Corp Method of manufacturing an implosion-free television display tube

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912105A (en) * 1971-01-08 1975-10-14 Philips Corp Implosion-free picture tube
US3904820A (en) * 1973-02-12 1975-09-09 Philips Corp Cathode-ray tube with implosion safety
US5249059A (en) * 1991-12-05 1993-09-28 Samsung Electron Devices Co., Ltd. Cathode-ray tube having explosion proof band
US6282784B1 (en) * 1996-08-05 2001-09-04 Ascometal Method of assembling internal combustion engine connecting rod

Also Published As

Publication number Publication date
GB1359413A (en) 1974-07-10
ES398624A1 (es) 1974-08-16
US3912105A (en) 1975-10-14
FR2121663B1 (en, 2012) 1974-12-20
CA987724A (en) 1976-04-20
IT946336B (it) 1973-05-21
JPS5634984B1 (en, 2012) 1981-08-14
FR2121663A1 (en, 2012) 1972-08-25
AU3742971A (en) 1973-07-05
ES404814A1 (es) 1976-01-01
NL7100273A (en, 2012) 1972-07-11
DE2162446A1 (de) 1972-07-20
BE777786A (fr) 1972-07-06

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