GB1169455A - Electrostatic Coating Methods and Apparatus. - Google Patents
Electrostatic Coating Methods and Apparatus.Info
- Publication number
- GB1169455A GB1169455A GB143967A GB143967A GB1169455A GB 1169455 A GB1169455 A GB 1169455A GB 143967 A GB143967 A GB 143967A GB 143967 A GB143967 A GB 143967A GB 1169455 A GB1169455 A GB 1169455A
- Authority
- GB
- United Kingdom
- Prior art keywords
- face
- phosphor
- particles
- plate
- support
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
- B05C19/02—Apparatus specially adapted for applying particulate materials to surfaces using fluidised-bed techniques
- B05C19/025—Combined with electrostatic means
-
- 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
- H01J9/221—Applying luminescent coatings in continuous layers
- H01J9/225—Applying luminescent coatings in continuous layers by electrostatic or electrophoretic processes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
1,169,455. Electrostatic coating; coated cathode ray tubes. RANSBURG ELECTROCOATING CORP. 11 Jan., 1967 [28 Feb., 1966], No. 1439/67. Heading B2J. [Also in Divisions C4 and H1] Charged phosphor particles are electrostatically applied. under the influence of an electric field, to a face of a Cathode ray tube which has first been coated with a sensitized binder. The apparatus comprises a deposition chamber 11 a gas-permeable plate 28, to support powder particles, mounted in the chamber, an electrode assembly including annuli 39 and points 42, on a charging head 38 and pins 43 on the plate, an earthed support 22 for the C.R.T. face 10 above the electrode assembly, means 34 to force air or other gas through the plate to form a fluidized bed of particles with a cloud of particles above it, and means 44 to establish an electric field, charge the particles and deposit them on the face. Phosphor particles flowing over the chamber edges are caught by a jacket 14 and pumped to a reservoir 19. The support 22 is rotated by a motor 21. Alternatively the plate 28 may be rotated, or both support and plate may be fixed. A colour television tube face is prepared by applying to the uncoated face a light-sensitive binder e.g. comprising 3% polyvinyl alcohol (P.V.A.) 0.5% ammonium dichromate in 1:1 isospropylalcohol/water. After drying the tube face is coated with a first phosphor and a dotted image-producing screen layed over the phosphor screen which is then exposed to light. The light polymerizes the P.V.A. Unpolymerized P.V.A. and phosphor not within the dotted areas is removed by rinsing with water. Second and third offset phosphor dot patterns are similarly applied to second and third polymerizable binder coatings. A monochrome tube is prepared by light exposure without the image-producing screen.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53047366A | 1966-02-28 | 1966-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1169455A true GB1169455A (en) | 1969-11-05 |
Family
ID=24113745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB143967A Expired GB1169455A (en) | 1966-02-28 | 1967-01-11 | Electrostatic Coating Methods and Apparatus. |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE694766A (en) |
CH (1) | CH461321A (en) |
DE (2) | DE1512391A1 (en) |
FR (1) | FR1511810A (en) |
GB (1) | GB1169455A (en) |
NL (1) | NL6702066A (en) |
SE (1) | SE340490B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477285A (en) * | 1993-10-06 | 1995-12-19 | Thomson Consumer Electronics, Inc. | CRT developing apparatus |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4084019A (en) * | 1976-02-05 | 1978-04-11 | Armco Steel Corporation | Electrostatic coating grid and method |
CA1066497A (en) * | 1976-02-26 | 1979-11-20 | Douglas C. Nethersole | Electrostatic fluidized bed coating unit |
-
1967
- 1967-01-11 GB GB143967A patent/GB1169455A/en not_active Expired
- 1967-01-19 DE DE19671512391 patent/DE1512391A1/en active Pending
- 1967-01-19 CH CH78867A patent/CH461321A/en unknown
- 1967-01-19 DE DE19671725006 patent/DE1725006A1/en active Pending
- 1967-02-10 NL NL6702066A patent/NL6702066A/xx unknown
- 1967-02-14 FR FR94854A patent/FR1511810A/en not_active Expired
- 1967-02-27 SE SE270767A patent/SE340490B/xx unknown
- 1967-02-28 BE BE694766D patent/BE694766A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477285A (en) * | 1993-10-06 | 1995-12-19 | Thomson Consumer Electronics, Inc. | CRT developing apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE1725006A1 (en) | 1975-01-09 |
SE340490B (en) | 1971-11-22 |
DE1512391A1 (en) | 1969-04-17 |
BE694766A (en) | 1967-08-28 |
CH461321A (en) | 1968-08-15 |
FR1511810A (en) | 1968-02-02 |
NL6702066A (en) | 1967-08-29 |
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