GB1474998A - Forming apertures in a metal sheet - Google Patents

Forming apertures in a metal sheet

Info

Publication number
GB1474998A
GB1474998A GB3097374A GB3097374A GB1474998A GB 1474998 A GB1474998 A GB 1474998A GB 3097374 A GB3097374 A GB 3097374A GB 3097374 A GB3097374 A GB 3097374A GB 1474998 A GB1474998 A GB 1474998A
Authority
GB
United Kingdom
Prior art keywords
foil
apertures
cavities
metal sheet
etchant
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
GB3097374A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1474998A publication Critical patent/GB1474998A/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
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/02—Local etching

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

1474998 Etching PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 12 July 1974 [16 July 1973] 30973/74 Heading B6J Metal foil 1 is provided with masks 3, 5 on both sides, then the apertures 7 in mask 3 are closed by application of synthetic material member 11 while etchant is sprayed against the foil through apertures 9 to form cavities 13. Then the member 11 is removed and etchant is sprayed against the foil through the apertures 7 to form smaller cavities communicating with the cavities 13. The apertured foil so produced is used as a shadow mask in a colour television display tube. Preferably the foil 1 is an extended tape and the member 11 is a tape or endless band, adhering to the foil at their edges.
GB3097374A 1973-07-16 1974-07-12 Forming apertures in a metal sheet Expired GB1474998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7309840A NL7309840A (en) 1973-07-16 1973-07-16 PROCESS FOR FORMING HOLES IN A THIN PLATE, ESPECIALLY FOR THE MANUFACTURE OF SHADOW MASKS FOR COLOR TV PICTURE TUBES.

Publications (1)

Publication Number Publication Date
GB1474998A true GB1474998A (en) 1977-05-25

Family

ID=19819270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3097374A Expired GB1474998A (en) 1973-07-16 1974-07-12 Forming apertures in a metal sheet

Country Status (5)

Country Link
JP (1) JPS5536068B2 (en)
DE (1) DE2432602C2 (en)
FR (1) FR2238239B1 (en)
GB (1) GB1474998A (en)
NL (1) NL7309840A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971682A (en) * 1974-07-11 1976-07-27 Buckbee-Mears Company Etching process for accurately making small holes in thick materials
NL7600418A (en) * 1976-01-16 1977-07-19 Philips Nv METHOD FOR MANUFACTURING A COLOR IMAGE TUBE, COLOR IMAGE TUBE MADE IN ACCORDANCE WITH THE METHOD AND DEVICE FOR PERFORMING THE METHOD.
US4124437A (en) * 1976-04-05 1978-11-07 Buckbee-Mears Company System for etching patterns of small openings on a continuous strip of metal
JPS52142326A (en) * 1976-05-21 1977-11-28 Yamashita Seisakushiyo Kk Vibration proofing equipment
JPS53113990U (en) * 1977-02-18 1978-09-11
JPS586095B2 (en) * 1977-09-14 1983-02-03 日本発条株式会社 Vibration damping device
US4139434A (en) * 1978-01-30 1979-02-13 General Dynamics Corporation Method of making circuitry with bump contacts
JPS5551146A (en) * 1978-10-06 1980-04-14 Nhk Spring Co Ltd Vibration control device
JPS57149640A (en) * 1981-03-10 1982-09-16 Junichiro Omata Ball screw type vibro-isolation device

Also Published As

Publication number Publication date
DE2432602A1 (en) 1975-02-06
DE2432602C2 (en) 1982-05-19
JPS5039236A (en) 1975-04-11
FR2238239A1 (en) 1975-02-14
JPS5536068B2 (en) 1980-09-18
NL7309840A (en) 1975-01-20
FR2238239B1 (en) 1977-07-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930712