JPS5671257A - Manufacturing process of color picture tube - Google Patents

Manufacturing process of color picture tube

Info

Publication number
JPS5671257A
JPS5671257A JP14763979A JP14763979A JPS5671257A JP S5671257 A JPS5671257 A JP S5671257A JP 14763979 A JP14763979 A JP 14763979A JP 14763979 A JP14763979 A JP 14763979A JP S5671257 A JPS5671257 A JP S5671257A
Authority
JP
Japan
Prior art keywords
notches
fluorescent screen
forms
overscanning
corners
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.)
Pending
Application number
JP14763979A
Other languages
Japanese (ja)
Inventor
Toshio Toyosawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14763979A priority Critical patent/JPS5671257A/en
Publication of JPS5671257A publication Critical patent/JPS5671257A/en
Pending legal-status Critical Current

Links

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

Abstract

PURPOSE:To prevent abnormal light emission on the fluorescent screen due to overscanning of electronic beams in such a way that when a thin mask frame is formed, notches are provided at four corners of its end parts, and it is bent at its final process. CONSTITUTION:A thin mask frame 27 to support a shadow mask 26 through a spring 30 to a panel pin 25 forms practically in W-letter shape from the first side 271, the second side 272, the third side 273, and the fourth side 274 by press-machining, or another, forms a bar fetching line 28 at a settled interval from the end part 276 of the fourth side 274, and forms notches 29 to get to the line 28 at four corners. In consequence, forming the fifth side 275 by means of bending the notches 29 at its final process of the fluorescent screen can prevent the fluorescent screen from letting the electronic beams undesirably emit the light at the time of overscanning without having any bad influence upon the assembly.
JP14763979A 1979-11-16 1979-11-16 Manufacturing process of color picture tube Pending JPS5671257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14763979A JPS5671257A (en) 1979-11-16 1979-11-16 Manufacturing process of color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14763979A JPS5671257A (en) 1979-11-16 1979-11-16 Manufacturing process of color picture tube

Publications (1)

Publication Number Publication Date
JPS5671257A true JPS5671257A (en) 1981-06-13

Family

ID=15434877

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14763979A Pending JPS5671257A (en) 1979-11-16 1979-11-16 Manufacturing process of color picture tube

Country Status (1)

Country Link
JP (1) JPS5671257A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748371A (en) * 1987-02-10 1988-05-31 Rca Licensing Corporation Cathode-ray tube shadow mask for low overscan

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748371A (en) * 1987-02-10 1988-05-31 Rca Licensing Corporation Cathode-ray tube shadow mask for low overscan

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