GB1374449A - Method for manufacturing a front plate for a cathode ray tube and a front plate manufactured by means of this method - Google Patents

Method for manufacturing a front plate for a cathode ray tube and a front plate manufactured by means of this method

Info

Publication number
GB1374449A
GB1374449A GB5344171A GB5344171A GB1374449A GB 1374449 A GB1374449 A GB 1374449A GB 5344171 A GB5344171 A GB 5344171A GB 5344171 A GB5344171 A GB 5344171A GB 1374449 A GB1374449 A GB 1374449A
Authority
GB
United Kingdom
Prior art keywords
die
glass
former
front plate
burners
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
Application number
GB5344171A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1374449A publication Critical patent/GB1374449A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/0307—Press-bending involving applying local or additional heating, cooling or insulating means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus 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
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/244—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for cathode ray tubes

Abstract

1374449 Shaping glass sheets LICENTIA PATENT-VERWALTUNGS GmbH 17 Nov 1971 [20 Nov 1970] 53441/71 Heading C1M A cathode-ray tube front plate is produced by resting a plane parallel plate 3 of glass on a die 2 so as to overhang the edge of the die, then heating by burners 5 only the overhanging glass 4 and applying a former 1 to produce a rim for attachment to the funnel shaped portion of the cathode-ray tube. The die 2 is raised into the former 1 so that contact between the inner surface 7 of the former 1 and the part of the plate 3 which is to form the front of the tube is avoided. The die 2 may possess a raised central portion 9 so that complete contact with the glass is avoided. The glass may be preheated, in its entirety, to a temperature below its softening point prior to the forming operation. A measuring grid may be provided on the surface of the glass which contacts the die. In place of the annular burner 5 shown, only two or three burners may be provided and both die 2 and former 1 are rotated. For rectangular front plates, the distance of the burners for the axis of rotation may be varied as by cam plates. The burners may act on the underside of the edge 4 instead of from above. The die and former may be formed of a refractory material and carbon respectively. The front plate with grid and fluorescent screen is then sealed by its rim to the funnel section.
GB5344171A 1970-11-20 1971-11-17 Method for manufacturing a front plate for a cathode ray tube and a front plate manufactured by means of this method Expired GB1374449A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702056978 DE2056978A1 (en) 1970-11-20 1970-11-20 Method of manufacturing a faceplate for a cathode ray tube and cathode ray tube manufactured using this method

Publications (1)

Publication Number Publication Date
GB1374449A true GB1374449A (en) 1974-11-20

Family

ID=5788593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5344171A Expired GB1374449A (en) 1970-11-20 1971-11-17 Method for manufacturing a front plate for a cathode ray tube and a front plate manufactured by means of this method

Country Status (3)

Country Link
DE (1) DE2056978A1 (en)
FR (1) FR2114908A5 (en)
GB (1) GB1374449A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213143A (en) * 1987-11-06 1989-08-09 Nippon Sheet Glass Co Ltd Method of forming a glass product

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2777559B1 (en) * 1998-04-16 2000-07-13 En Nom Collectif Eurokera Soc MANUFACTURE OF VITROCERAMIC PLATES WITH OPENING (S) WITH A DEFORMED EDGE; DEFORMED VITROCERAMIC PLATES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213143A (en) * 1987-11-06 1989-08-09 Nippon Sheet Glass Co Ltd Method of forming a glass product
US4891055A (en) * 1987-11-06 1990-01-02 Nippon Sheet Glass Co., Ltd. Method of forming glass product having smooth surface
GB2213143B (en) * 1987-11-06 1991-10-23 Nippon Sheet Glass Co Ltd Method of forming a glass product

Also Published As

Publication number Publication date
DE2056978A1 (en) 1972-05-25
FR2114908A5 (en) 1972-06-30

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee