GB1464131A - Manufacture of shadow masks - Google Patents
Manufacture of shadow masksInfo
- Publication number
- GB1464131A GB1464131A GB778974A GB778974A GB1464131A GB 1464131 A GB1464131 A GB 1464131A GB 778974 A GB778974 A GB 778974A GB 778974 A GB778974 A GB 778974A GB 1464131 A GB1464131 A GB 1464131A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- rolling
- forming
- rolled
- feb
- 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
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/496—Multiperforated metal article making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49995—Shaping one-piece blank by removing material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49995—Shaping one-piece blank by removing material
- Y10T29/49996—Successive distinct removal operations
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
1464131 Making shadow masks HITACHI Ltd 20 Feb 1974 [21 Feb 1973 4 July 1973] 7789/74 Heading B3A A method of making a shadow mask includes annealing a sheet of low carbon or mild steel, skin-pass rolling the annealed sheet to a reduction of 0À5-15%, forming holes in the sheet and press forming it to shape. The sheet material is annealed at about 600 C. for 20 minutes to give high elongation properties. The sheet is normally cold rolled but it may be rolled hot if desired. Rolling imparts high ductility and substantially nil elongation at the yield point. The sheet has holes formed by etching and is finally pressed to shape, normally cold but hot forming may be used. Skin-pass rolling the sheet material delays ageing so that the rolled sheets can be left several weeks between rolling and press forming
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP48020167A JPS5244868B2 (en) | 1973-02-21 | 1973-02-21 | |
JP48075358A JPS5023317A (en) | 1973-07-04 | 1973-07-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1464131A true GB1464131A (en) | 1977-02-09 |
Family
ID=26357073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB778974A Expired GB1464131A (en) | 1973-02-21 | 1974-02-20 | Manufacture of shadow masks |
Country Status (4)
Country | Link |
---|---|
US (1) | US3909928A (en) |
DE (1) | DE2408435C3 (en) |
FR (1) | FR2218642B1 (en) |
GB (1) | GB1464131A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4094678A (en) * | 1976-12-07 | 1978-06-13 | Zenith Radio Corporation | Method of making curved color cathode ray tube shadow masks having interregistrable electron beam-passing aperture patterns |
US4187443A (en) * | 1978-09-08 | 1980-02-05 | Rca Corporation | Color picture tube having improved corrugated apertured mask and method of making same |
JPS607342B2 (en) * | 1978-10-18 | 1985-02-23 | 日新製鋼株式会社 | Manufacturing method of shadow mask for color TV cathode ray tube |
JPS5569238A (en) * | 1978-11-15 | 1980-05-24 | Nisshin Steel Co Ltd | Steel for shadow mask of color television braun tube |
US4210843A (en) * | 1979-04-03 | 1980-07-01 | Zenith Radio Corporation | Color CRT shadow mask and method of making same |
CA1204143A (en) * | 1982-08-27 | 1986-05-06 | Kanemitsu Sato | Textured shadow mask |
JPS59200721A (en) * | 1983-04-27 | 1984-11-14 | Toshiba Corp | Manufacture of shadow mask |
NL8302276A (en) * | 1983-06-28 | 1985-01-16 | Philips Nv | CATHODE JET TUBE WITH AN FE-CO-CR SHADOW MASK AND METHOD FOR MANUFACTURING SUCH SHADOW MASK. |
US20040100638A1 (en) * | 2002-11-27 | 2004-05-27 | The Regents Of The University Of California. | Correcting surface contour of a non-rigid object through control of surface residual stress |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3376451A (en) * | 1966-09-12 | 1968-04-02 | Buckbee Mears Co | Shadow mask and magnetic shield unitary construction for color tv picture tubes |
US3519869A (en) * | 1967-04-11 | 1970-07-07 | Victor Company Of Japan | Shadow mask having apertures progressively tapered from center to periphery |
US3479546A (en) * | 1968-06-11 | 1969-11-18 | Buckbee Mears Co | Self-supporting shadow mask for colored tv picture tubes |
US3676914A (en) * | 1970-05-01 | 1972-07-18 | Zenith Radio Corp | Manufacture of shadow mask color picture tube |
US3707640A (en) * | 1970-06-18 | 1972-12-26 | Zenith Radio Corp | Shadow mask having double-sized apertures |
US3725065A (en) * | 1970-09-30 | 1973-04-03 | Rca Corp | Method for making a kinescope comprising a color selection mask with temporary corridors |
US3808071A (en) * | 1972-04-14 | 1974-04-30 | Zenith Radio Corp | Etch-back process |
US3809945A (en) * | 1973-03-02 | 1974-05-07 | Zenith Radio Corp | Shadow mask for color cathode ray tube and method of manufacture thereof |
-
1974
- 1974-02-20 FR FR7405677A patent/FR2218642B1/fr not_active Expired
- 1974-02-20 GB GB778974A patent/GB1464131A/en not_active Expired
- 1974-02-21 US US444569A patent/US3909928A/en not_active Expired - Lifetime
- 1974-02-21 DE DE2408435A patent/DE2408435C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2408435B2 (en) | 1981-07-02 |
US3909928A (en) | 1975-10-07 |
DE2408435A1 (en) | 1974-09-12 |
FR2218642A1 (en) | 1974-09-13 |
FR2218642B1 (en) | 1976-11-26 |
DE2408435C3 (en) | 1982-03-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19940219 |