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US3961600A
Expired / Lapsed
US
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Apparatus for coating incandescent lamp bulbs
Assignee: GTE Sylvania Inc
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Filing: 1974-10-23
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Granted: 1976-06-08
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Expires: 1994-10-23
Abstract
Abstract The powder used in applying a light diffusing coating to the inner wall of an incandescent lamp bulb is deposited substantially free of clumps by, amongst other things, maintaining the powder in suspension in a closed container prior to deposition. The powder in said container is also maintained at a constant level. The powder is carried from the container to the lamp bulbs by a stream of air and is passed through a vortex nozzle which breaks up clumps or agglomerates of powder.
Inventors
- 👤 Horace H. Homer
- 👤 Richard S. Doron
- 👤 Donald J. Grolemund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:17
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/14; B05B7/1404; B05B7/1472; B05B13/00; B05B13/06; B05B5/00; B05B5/08; B05B5/12; B05B5/16; B05B5/1683; B05B7/1477; H; H01; H01K; H01K3/00; H01K3/005; Y; Y10; Y10S; Y10S118/00; Y10S118/05
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
Apparatus for coating incandescent lamp bulbs with powder comprising: a container having means for maintaining the powder in suspension; a constant level sensor means in said container for maintaining the suspended powder at a constant level; a coating manifold; a vortex nozzle; means for drawing suspended powder from said container through said vortex nozzle into said coating manifold; and a tube for carrying powder from said coating manifold to a lamp bulb coating station, wherein said vortex nozzle contains an axial bore connected to said drawing means and a plurality of holes opening inwardly into the bore in a direction toward said manifold and angular with respect to its axis so as to impart a forward swirling motion to powder transported through said nozzle, and means for supplying air to said holes.
Claim 2
Dependent Claim
132 words
Apparatus for coating incandescent lamp bulbs with powder comprising: a container having means for maintaining the powder in suspension; a constant level sensor means in said container for maintaining the suspended powder at a constant level; a coating manifold; a vortex nozzle; means for drawing suspended powder from said container through said vortex nozzle into said coating manifold; and a tube for carrying powder from said coating manifold to a lamp bulb coating station, wherein said vortex nozzle contains an axial bore connected to said drawing means and a plurality of holes opening inwardly into the bore in a direction toward said manifold and angular with respect to its axis so as to impart a forward swirling motion to powder transported through said nozzle, and means for supplying air to said holes.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 wherein said means for maintaining the powder in suspension comprises a fluidizing bed.
Claim 4
Dependent Claim
54 words
The apparatus of claim 1 including, in addition, a two way valve in the tube between said manifold and the coating station and means for regulating said valve so that said tube is connected to said coating station during a predetermined coating and wherein said coating station is bypassed during a predetermined non-coating cycle.
Claim 5
Dependent Claim
18 words
The apparatus of claim 3 comprising, in addition, a powder storage tank for supplying powder to said container.
Claim 6
Dependent Claim
21 words
The apparatus of claim 4 wherein said constant level sensor operates to draw powder from said storage tank to said container.
Claim 7
Dependent Claim
24 words
The apparatus of claim 5 wherein said tube is connected to said storage tank through said two way valve during the predetermined noncoating cycle.
Claim 8
Dependent Claim
56 words
The apparatus of claim 1 comprising, in addition, one or more additional tubes for carrying powder from said coating manifold to additional coating stations having means to support said lamp bulbs, one tube per coating station, so that a bulb to be coated receives a fractional amount of the total desired coating at each coating station.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |