GB1111582A - Improvements in or relating to methods of manufacturing shadow masks for cathode ray tubes - Google Patents
Improvements in or relating to methods of manufacturing shadow masks for cathode ray tubesInfo
- Publication number
- GB1111582A GB1111582A GB1245365A GB1245365A GB1111582A GB 1111582 A GB1111582 A GB 1111582A GB 1245365 A GB1245365 A GB 1245365A GB 1245365 A GB1245365 A GB 1245365A GB 1111582 A GB1111582 A GB 1111582A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blank
- shadow mask
- line screen
- cross
- areas
- 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
- 238000000034 method Methods 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 229920002120 photoresistant polymer Polymers 0.000 abstract 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
1,111,582. Colour television tubes. MULLARD Ltd. 2 March, 1966 [24 March, 1965], No. 12453/65. Heading H1D. [Also in Division B3] A shadow mask for a colour television tube is made by a photoresist method involving the use of a photographic transparency which is formed by exposure to an illuminated aperture through a transparent cross-line screen in a system constituting a multi-aperture stenopaic system, i.e. a system in which the exposed areas or images are in the shape of the illuminated aperture, e.g. circular, rather than in the shape of the apertures of the cross-line screen. These apertures may, however, be rhomboid shaped in the case of a delta-arranged three-gun tube and may be circular or hexagonal to allow a certain latitude in the placement of the cross-line screen. A photographic transparency may be applied to each photographically sensitized side of a blank which is to form the shadow mask and the blank exposed and etched from both sides. Uniformly sized areas may be etched on one side of the blank and areas radially decreasing in size on the other so that holes are formed which assume an increasingly conical shape towards the edge of the shadow mask.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1245365A GB1111582A (en) | 1965-03-24 | 1965-03-24 | Improvements in or relating to methods of manufacturing shadow masks for cathode ray tubes |
| SE3732/66A SE307803B (en) | 1965-03-24 | 1966-03-21 | |
| AT273266A AT264608B (en) | 1965-03-24 | 1966-03-22 | Process for the production of shadow masks for cathode ray tubes |
| DE19661462818 DE1462818A1 (en) | 1965-03-24 | 1966-03-22 | Process for the production of shadow masks for cathode ray tubes |
| BE678311D BE678311A (en) | 1965-03-24 | 1966-03-23 | |
| FR54767A FR1471958A (en) | 1965-03-24 | 1966-03-24 | Manufacturing process of shadow masks for cathode ray tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1245365A GB1111582A (en) | 1965-03-24 | 1965-03-24 | Improvements in or relating to methods of manufacturing shadow masks for cathode ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1111582A true GB1111582A (en) | 1968-05-01 |
Family
ID=10004884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1245365A Expired GB1111582A (en) | 1965-03-24 | 1965-03-24 | Improvements in or relating to methods of manufacturing shadow masks for cathode ray tubes |
Country Status (4)
| Country | Link |
|---|---|
| AT (1) | AT264608B (en) |
| BE (1) | BE678311A (en) |
| DE (1) | DE1462818A1 (en) |
| GB (1) | GB1111582A (en) |
-
1965
- 1965-03-24 GB GB1245365A patent/GB1111582A/en not_active Expired
-
1966
- 1966-03-22 DE DE19661462818 patent/DE1462818A1/en active Pending
- 1966-03-22 AT AT273266A patent/AT264608B/en active
- 1966-03-23 BE BE678311D patent/BE678311A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1462818A1 (en) | 1968-12-05 |
| AT264608B (en) | 1968-09-10 |
| BE678311A (en) | 1966-09-23 |
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