GB1442180A - Cathode ray tube devices - Google Patents

Cathode ray tube devices

Info

Publication number
GB1442180A
GB1442180A GB3164373A GB3164373A GB1442180A GB 1442180 A GB1442180 A GB 1442180A GB 3164373 A GB3164373 A GB 3164373A GB 3164373 A GB3164373 A GB 3164373A GB 1442180 A GB1442180 A GB 1442180A
Authority
GB
United Kingdom
Prior art keywords
mask
frame
apertures
cups
heating
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
GB3164373A
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Publication of GB1442180A publication Critical patent/GB1442180A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
    • 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
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

1442180 Colour television tubes RCA CORPORATION 3 July 1973 [3 July 1972] 31643/73 Heading H1D A colour television tube shadow mask comprises a thin metal sheet having multi-apertured masking portion 28 and imperforate peripheral portion 32 attached to metal reinforcing frame 29, portion 32 having a resistance to heat flow which is # 11 % that of a portion 32 formed by a solid sheet of thickness equal to that of the masking portion, so as to impede heat conduction between portion 28 and frame 29. A method of fabricating a temporary apertured mask for photographic production of a phosphor screen comprises applying to at least one surface of the metal sheet an organic material coating the viscosity of which is reversibly reduced by heating to provide a thin film closing the mask apertures, heating to break the thin film and form a bead inside and partially closing each aperture, and cooling to harden. The above construction ensures the outer apertures remain sufficiently heated to break the thin films, and the frame serves as a heat sink to heat generated by electrons. Skirt portion 32 in Fig. 7 has etched dimples or depressions, and skirt portion (60) in Fig. 9 (not shown) is of lesser thickness than the masking portion. Extending the lengths of portions 32 and (60) further increases the heat resistance. Alternatively, the masking portion is of a high-conductive metal such as Cu, and the skirt portion of a low conductive metal such as steel. Preferably the mass/unit area of the skirt portion substantially equals the mass/unit area of the mask portion. The mask may be 0À006-0À007 inch steel welded to a 0À93 inch steel frame. Mask apertures may be opposed cups (38), (39), Fig. 4 (not shown). Cups (38) are substantially uniform over the masking portion, while cups (39) are graded. Shadowmask apertures and frame dimensions are given. In Fig. 7, the cups extend in the same pattern as the apertures into skirt 32, the mass ratio being 57 : 62. Other ratios are given. The organic material comprising demineralized water, wetting agent, p.v.a. water solution and ethylene glycol may be applied in an upward trajectory as in Specification 1,374,728. Heating cycles are described. Reference is made to a one piece mask electrode, and also heating of the frame 29 (Fig. 11, not shown).
GB3164373A 1972-07-03 1973-07-03 Cathode ray tube devices Expired GB1442180A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26880272A 1972-07-03 1972-07-03

Publications (1)

Publication Number Publication Date
GB1442180A true GB1442180A (en) 1976-07-07

Family

ID=23024546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3164373A Expired GB1442180A (en) 1972-07-03 1973-07-03 Cathode ray tube devices

Country Status (12)

Country Link
JP (1) JPS5111471B2 (en)
AU (1) AU477291B2 (en)
BE (1) BE801803A (en)
BR (1) BR7304902D0 (en)
CA (1) CA988142A (en)
DE (1) DE2333865C2 (en)
FR (1) FR2237304B1 (en)
GB (1) GB1442180A (en)
IT (1) IT986057B (en)
NL (1) NL181313C (en)
PL (1) PL91570B1 (en)
SU (1) SU505393A3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51142032A (en) * 1975-06-02 1976-12-07 Toray Ind Inc Radiation crosslinkable coating composition
JPS5918939B2 (en) * 1975-09-04 1984-05-01 三菱電機株式会社 How to repair insulation coating on metal plate
DE2646512A1 (en) * 1976-10-15 1978-04-20 Fritz Loedige PROCEDURE FOR BOTH TREATMENT OF BULK GOODS
JPS583551A (en) * 1981-06-26 1983-01-10 Seiko Epson Corp Insulating method for core of motor
JPS63109195A (en) * 1986-10-24 1988-05-13 Minoru Mitani Surface treatment of aluminum or its alloy
JPS6416593U (en) * 1987-07-17 1989-01-27

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE540599A (en) * 1954-08-18

Also Published As

Publication number Publication date
FR2237304A1 (en) 1975-02-07
FR2237304B1 (en) 1983-05-06
JPS5111471B2 (en) 1976-04-12
JPS4946374A (en) 1974-05-02
AU5756173A (en) 1975-01-09
NL181313B (en) 1987-02-16
BR7304902D0 (en) 1974-08-22
PL91570B1 (en) 1977-03-31
NL181313C (en) 1987-07-16
DE2333865C2 (en) 1984-11-15
NL7309194A (en) 1974-01-07
IT986057B (en) 1975-01-10
AU477291B2 (en) 1976-10-21
DE2333865A1 (en) 1974-01-17
SU505393A3 (en) 1976-02-28
CA988142A (en) 1976-04-27
BE801803A (en) 1973-11-05

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19930702