US3717121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curtain coating head
Assignee: PPG Industries Inc
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Filing: 1970-06-12
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Granted: 1973-02-20
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Expires: 1990-06-12
Abstract
Abstract A high speed uniform coating method may be carried out with the use of a curtain coating head comprising a means for dispersing coating material in a first of a laterally disposed succession of open reservoirs each reservoir disposed at a lower elevation than the next and the last reservoir terminating in a vertically disposed smooth continuous face plate containing two vertically disposed rods along the face and width of the face plate.
Inventors
- 👤 G Bruckbauer
- 👤 M Corty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:45
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/30; B05D1/305; B05C; B05C5/00; B05C5/002; B05C5/004; B05C5/005; Y; Y10; Y10S; Y10S118/00; Y10S118/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
134 words
A curtain coating head comprising a means for dispersing coating material in a first of a laterally disposed succession of elongated upwardly open channel-shaped reservoirs each successive reservoir disposed at a successively lower elevation than said first reservoir and wherein each successive reservoir has two opposite sides of which one side is of lesser height than the other and the side of lesser height forms a common wall with the side of the next reservoir which is of greater height than its other side and wherein the last of said reservoirs terminates in a vertically disposed smooth continuous face plate which extends lower than the last of the said reservoirs and which supports two vertically disposed rods along the face of said smooth continuous face plate, said rods extending lower than said face plate.
Claim 2
Dependent Claim
134 words
A curtain coating head comprising a means for dispersing coating material in a first of a laterally disposed succession of elongated upwardly open channel-shaped reservoirs each successive reservoir disposed at a successively lower elevation than said first reservoir and wherein each successive reservoir has two opposite sides of which one side is of lesser height than the other and the side of lesser height forms a common wall with the side of the next reservoir which is of greater height than its other side and wherein the last of said reservoirs terminates in a vertically disposed smooth continuous face plate which extends lower than the last of the said reservoirs and which supports two vertically disposed rods along the face of said smooth continuous face plate, said rods extending lower than said face plate.
Claim 3
Dependent Claim
134 words
A curtain coating head comprising a means for dispersing coating material in a first of a laterally disposed succession of elongated upwardly open channel-shaped reservoirs each successive reservoir disposed at a successively lower elevation than said first reservoir and wherein each successive reservoir has two opposite sides of which one side is of lesser height than the other and the side of lesser height forms a common wall with the side of the next reservoir which is of greater height than its other side and wherein the last of said reservoirs terminates in a vertically disposed smooth continuous face plate which extends lower than the last of the said reservoirs and which supports two vertically disposed rods along the face of said smooth continuous face plate, said rods extending lower than said face plate.
Claim 4
Dependent Claim
134 words
A curtain coating head comprising a means for dispersing coating material in a first of a laterally disposed succession of elongated upwardly open channel-shaped reservoirs each successive reservoir disposed at a successively lower elevation than said first reservoir and wherein each successive reservoir has two opposite sides of which one side is of lesser height than the other and the side of lesser height forms a common wall with the side of the next reservoir which is of greater height than its other side and wherein the last of said reservoirs terminates in a vertically disposed smooth continuous face plate which extends lower than the last of the said reservoirs and which supports two vertically disposed rods along the face of said smooth continuous face plate, said rods extending lower than said face plate.
Claim 5
Dependent Claim
22 words
The cUrtain coating head of claim 1 wherein the means for dispersing coating material is a foraminous enclosed conduit containing an inlet.
Claim 6
Dependent Claim
19 words
The curtain coating head of claim 2 wherein the foraminous enclosed conduit is centrally mounted in the first reservoir.
Claim 7
Dependent Claim
51 words
The curtain coating head of claim 2 wherein the inlet on the conduit is in the center of the length of the conduit and the openings in the conduit are spaced along a straight line and wherein the spacing from opening to opening is greater toward the center of the conduit.
Claim 8
Dependent Claim
61 words
The curtain coating head of claim 2 wherein the inlet of the conduit is in the center of the length of the conduit and the openings in the conduit are spaced equidistant from one another with the openings located at a greater distance from the center of the conduit being larger than the openings closer toward the center of the conduit.
Claim 9
Dependent Claim
34 words
The curtain coating head of claim 1 wherein the two vertically disposed rods along the face of the face plate also extend perpendicularly across the thickness of the upper edge of the face plate.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |