US4141315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coating fibers, threads and sheets
Assignee: Bayer AG
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Filing: 1977-10-12
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Granted: 1979-02-27
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Expires: 1997-10-12
Abstract
Abstract This invention relates to an apparatus for applying a thin layer of liquid systems to fibers, threads or sheets which are moved uniformly in a linear direction which comprises continuously foaming the liquid system and bringing the threads, fibers or sheets into contact with the foamed system by a one-way process.
Inventors
- 👤 Heinrich Nassenstein
- 👤 Richard Menold
- 👤 Fritz Feld
- 👤 Konrad Ellegast
- 👤 Roland Weisbeck
- 👤 Hans G. Gelhaar
- 👤 Lothar Ruetz
- 👤 Friedrich W. Elsasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:07
CPC Classifications
D; D06; D06B; D06B19/00; D06B19/0088; D06B19/0094; D06B1/00; D06B1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
An apparatus for uniformly applying a coating of a liquid system in a predetermined quantity to a fiber, thread or sheet comprising (a) a foaming chamber including a gas inlet for introducing blowing gas into the chamber, a liquid inlet for introducing a liquid system into the chamber, foaming means for dispersing the gas in the liquid to form a foam on the liquid surface, and outlet means for discharging the foam from the chamber to form a cushion of built-up foam adapted to envelop a linearly moving stream of fibers, threads or sheets, said outlet means comprising a pair of spaced parallel pipes communicating with said foaming chamber, each pipe including a longitudinally-extending slot on the inner surface thereof for discharging the foam to form a cushion between the pipes, and said foaming means comprising a frit disposed above the gas inlet, whereby the liquid system is foamed by disposing the liquid system over the frit and blowing gas through the frit into the liquid system; (b) means for regulating the spacing between the pipes and means for regulating the length of each slot; and (c) means for moving the foam under pressure from the surface of the liquid through the outlet means.
Claim 2
Independent Claim
204 words
An apparatus for uniformly applying a coating of a liquid system in a predetermined quantity to a fiber, thread or sheet comprising (a) a foaming chamber including a gas inlet for introducing blowing gas into the chamber, a liquid inlet for introducing a liquid system into the chamber, foaming means for dispersing the gas in the liquid to form a foam on the liquid surface, and outlet means for discharging the foam from the chamber to form a cushion of built-up foam adapted to envelop a linearly moving stream of fibers, threads or sheets, said outlet means comprising a pair of spaced parallel pipes communicating with said foaming chamber, each pipe including a longitudinally-extending slot on the inner surface thereof for discharging the foam to form a cushion between the pipes, and said foaming means comprising a frit disposed above the gas inlet, whereby the liquid system is foamed by disposing the liquid system over the frit and blowing gas through the frit into the liquid system; (b) means for regulating the spacing between the pipes and means for regulating the length of each slot; and (c) means for moving the foam under pressure from the surface of the liquid through the outlet means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |