GB758968A - Improvements relating to the interior coating of lamp bulbs and the like - Google Patents
Improvements relating to the interior coating of lamp bulbs and the likeInfo
- Publication number
- GB758968A GB758968A GB12327/54A GB1232754A GB758968A GB 758968 A GB758968 A GB 758968A GB 12327/54 A GB12327/54 A GB 12327/54A GB 1232754 A GB1232754 A GB 1232754A GB 758968 A GB758968 A GB 758968A
- Authority
- GB
- United Kingdom
- Prior art keywords
- envelope
- coating
- suspension
- thinner
- neck
- 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
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
-
- 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
- H01J9/223—Applying luminescent coatings in continuous layers by uniformly dispersing of liquid
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
<PICT:0758968/III/1> <PICT:0758968/III/2> A method of applying a coating of powdered material, e.g. luminescent material, to a selected portion of the inner surface of an envelope, e.g. of a lamp, having an open-ended neck, comprises inserting the envelope neck 3 end-down over a notched suction tube 9 into a suspension bath 12 of the coating material, Fig. 1, withdrawing the air in the envelope 2 through the valve 15 to draw the suspension into the envelope, venting the interior space of the envelope to the atmosphere through the valve 15 when the column of suspension attains the desired upper cut-off level 7 for the coating to cause the column of suspension to recede therefrom, and immediately immersing the neck 3 up to the desired lower cut-off level 17 for the coating in a thinner bath 18 of toroidal form having an overflow spout 21, Fig. 2, while simultaneously passing a low velocity air stream through the tube 22 and the envelope 2 above the thinner to dry the coating 8 previously deposited on the inner surface of the envelope. The coating material can comprise a luminescent powder suspended in a binder such as nitro-cellulose dissolved in butyl or amyl acetate with or without naphtha, and the thinner can comprise any of the solvents last mentioned.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US758968XA | 1953-04-29 | 1953-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB758968A true GB758968A (en) | 1956-10-10 |
Family
ID=22128627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12327/54A Expired GB758968A (en) | 1953-04-29 | 1954-04-28 | Improvements relating to the interior coating of lamp bulbs and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB758968A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1071110A1 (en) * | 1999-07-22 | 2001-01-24 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Method for coating lamp vessels |
-
1954
- 1954-04-28 GB GB12327/54A patent/GB758968A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1071110A1 (en) * | 1999-07-22 | 2001-01-24 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Method for coating lamp vessels |
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