US3508310A - Method of manufacturing an implosion-free television display tube - Google Patents

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

Info

Publication number
US3508310A
US3508310A US738553A US3508310DA US3508310A US 3508310 A US3508310 A US 3508310A US 738553 A US738553 A US 738553A US 3508310D A US3508310D A US 3508310DA US 3508310 A US3508310 A US 3508310A
Authority
US
United States
Prior art keywords
band
bulb
implosion
display tube
manufacturing
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
US738553A
Other languages
English (en)
Inventor
Reinhart Charles Willem Eisses
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
Application granted granted Critical
Publication of US3508310A publication Critical patent/US3508310A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 television display tube, in which the bulb of the tube is tightly surrounded by an annular band after at least the inner side of the band has been coated with a glue layer consisting of polyvinyl acetate, the space left between the bulb and the band then being filled with a hardening filler material.
  • the invention further relates to a tube manufactured by this method.
  • the inner side of the band and preferably also the bulb itself are first coated with a glue layer of polyvinyl acetate, because it is of great importance that the filler material introduced into the space left between the band and the bulb should adhere satisfactorily both to the bulb and to the metal band.
  • the dimensions of the band or hood must be chosen so as to match these minimum bulb dimensions, as a result of which with larger bulbs the annular band or hood must be pressed around the bulb with a comparatively large force.
  • reference numeral 1 denotes the window and reference numeral 2 the cone of a television display tube. From the cone side, an annular band 3 is slipped around the protruding edge of the window and the sealing seam between window 1 and cone 2.
  • the band 3 is internally coated with a glue-layer 4 consisting of polyvinyl acetate.
  • the bulb is also coated with such a glue layer 5.
  • the band 3 is heated to 275 C. to 320 C. and is slipped around the bulb until it abuts against the shoulder of the mold match junction. After cooling, the remaining space is filled with a hardening filler material 6, preferably a polyester resin. If desired, the part of the bulb located between the annular band 3 and the display screen 9 may be left uncovered for reasons of mounting technology (smaller cabinet possible), in which event one or more further clamping bands 7 are arranged around the annular band 3 in order to increase the compressive force.
  • the cylindrical annular band 3 may also be replaced by a profiled band in the form of a hood partially enclosing the cone 2.
  • a method of manufacturing an implosion-free television display tube including an evacuated envelope having a window portion sealed to a conical portion and forming therewith a junction between the window portion and conical portion comprising the steps of coating at least the inner surface of an annular band, with a glue layer consisting of polyvinylacetate, drying the glue layer to set the polyvinylacetate, thereafter heating the so-coated annular band to a temperature between 275 C. and 320 C., placing the heated annular band around said junction of the envelope, cooling the annular band to shrink the same about the envelope placing the envelope under compressive stress while leaving a space between a portion of the band and the envelope, and filling the space between the annular band and the envelope with a hardenable filler material.
  • annular band has the shape of an annular hood.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Adhesives Or Adhesive Processes (AREA)
US738553A 1967-07-08 1968-06-20 Method of manufacturing an implosion-free television display tube Expired - Lifetime US3508310A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6709525A NL6709525A (it) 1967-07-08 1967-07-08

Publications (1)

Publication Number Publication Date
US3508310A true US3508310A (en) 1970-04-28

Family

ID=19800667

Family Applications (1)

Application Number Title Priority Date Filing Date
US738553A Expired - Lifetime US3508310A (en) 1967-07-08 1968-06-20 Method of manufacturing an implosion-free television display tube

Country Status (9)

Country Link
US (1) US3508310A (it)
AT (1) AT278919B (it)
BE (1) BE717797A (it)
CH (1) CH474847A (it)
DE (1) DE1764390A1 (it)
ES (1) ES355846A1 (it)
FR (1) FR1573516A (it)
GB (1) GB1162459A (it)
NL (1) NL6709525A (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593874A (en) * 1969-04-23 1971-07-20 Owens Illinois Inc Resistant cathode-ray tube
US3730990A (en) * 1969-08-01 1973-05-01 Hitachi Ltd Implosion-proof cathode-ray tube
US3818557A (en) * 1971-01-08 1974-06-25 Philips Corp Method of manufacturing an implosion-free picture tube for television display
US3845530A (en) * 1972-10-10 1974-11-05 Rca Corp Method for rendering cathode-ray tube more resistant to implosion and product thereof
US4029898A (en) * 1976-03-24 1977-06-14 Corning Glass Works Television picture tube face plate
US4158419A (en) * 1977-12-27 1979-06-19 Rca Corporation Implosion protected CRT
US4169274A (en) * 1978-03-27 1979-09-25 Gte Sylvania Incorporated Implosion resistant cathode ray tube
US4170027A (en) * 1978-03-27 1979-10-02 Gte Sylvania Incorporated Implosion resistant cathode ray tube and fabricating process

Citations (3)

* 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
US3278682A (en) * 1963-04-03 1966-10-11 Philips Corp Implosion-resistant cathode-ray tube with mounting brackets

Patent Citations (3)

* 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
US3278682A (en) * 1963-04-03 1966-10-11 Philips Corp Implosion-resistant cathode-ray tube with mounting brackets

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593874A (en) * 1969-04-23 1971-07-20 Owens Illinois Inc Resistant cathode-ray tube
US3730990A (en) * 1969-08-01 1973-05-01 Hitachi Ltd Implosion-proof cathode-ray tube
US3818557A (en) * 1971-01-08 1974-06-25 Philips Corp Method of manufacturing an implosion-free picture tube for television display
US3912105A (en) * 1971-01-08 1975-10-14 Philips Corp Implosion-free picture tube
US3845530A (en) * 1972-10-10 1974-11-05 Rca Corp Method for rendering cathode-ray tube more resistant to implosion and product thereof
US4029898A (en) * 1976-03-24 1977-06-14 Corning Glass Works Television picture tube face plate
US4158419A (en) * 1977-12-27 1979-06-19 Rca Corporation Implosion protected CRT
US4169274A (en) * 1978-03-27 1979-09-25 Gte Sylvania Incorporated Implosion resistant cathode ray tube
US4170027A (en) * 1978-03-27 1979-10-02 Gte Sylvania Incorporated Implosion resistant cathode ray tube and fabricating process

Also Published As

Publication number Publication date
CH474847A (de) 1969-06-30
FR1573516A (it) 1969-07-04
GB1162459A (en) 1969-08-27
NL6709525A (it) 1969-01-10
BE717797A (it) 1969-01-08
ES355846A1 (es) 1970-01-01
DE1764390A1 (de) 1971-07-08
AT278919B (de) 1970-02-25

Similar Documents

Publication Publication Date Title
US2248644A (en) Method of sealing evacuated envelopes
US3508310A (en) Method of manufacturing an implosion-free television display tube
US2749668A (en) Method of sealing vacuum-tight envelopes
US4339482A (en) Flat-panel display and method of manufacture
US3210171A (en) Method of supplying heat of fusion to glass-to-glass seal
US3623196A (en) Method of providing an anti-implosion clamping band around the envelope of a colour television picture tube
US2844868A (en) Method of joining refractory metals
US2747269A (en) Insulating structures
US3894858A (en) Preventing thermally induced fracture of cathode ray tube bulbs by application of a thermal insulator
US4427479A (en) Flat-panel display and method of manufacture
US3818557A (en) Method of manufacturing an implosion-free picture tube for television display
US3514276A (en) Method of manufacturing nonlinear fluorescent lamps
US3512234A (en) Method of providing a clamping band around the bulb of a television picture tube and implosion-free tube manufactured by means of this method
US3123470A (en) Bonding means and method
US3031737A (en) Metal-to-non-metal bond and method
US2848801A (en) Method of making ceramic metal seal
US3348297A (en) Method of manufacturing a mount for a semi-conductor device
US3041127A (en) Method of fabricating a cathode ray tube
JP2001508928A (ja) 画像表示装置用のフラットガラスパネルの製造方法
US4000997A (en) Method for reducing thermally induced fracture in cathode ray tube bulbs
US3708369A (en) Method of providing an anti-implosion clamping band around the envelope of a picture tube
US2977561A (en) Hermetically sealed electrical component and method of making the same
US2821811A (en) Method of manufacturing cathode-ray tubes
US3379913A (en) Crt face panel having article supporting studs therein
US2852722A (en) Electric rectifiers employing semi-conductors