US4353934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dip-coating method
Assignee: Mitsubishi Chemical Corp
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Filing: 1980-06-26
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Granted: 1982-10-12
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Expires: 2000-06-26
Abstract
Abstract A dip-coating method for forming a smooth coated film on the surface of an article by dipping the article in a coating solution while making ultrasonic waves act on the coating solution and forming a uniform liquid flow on the surface of the coating solution. An apparatus for practicing the method is also disclosed.
Inventors
- 👤 Atushi Nakashima
- 👤 Michisuke Edamatu
- 👤 Kenji Kushi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B01; B01D; B01D19/00; B01D19/0021; B01D19/0073; B01D19/0078; B05C; B05C3/00; B05C3/02; B05C3/04; B05C3/05
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
In the dip-coating method for obtaining a coated film on the surface of an article by circulating a coating solution in a tank, dipping the article in the solution and then pulling the article up out of the coating solution, the improvement which comprises irradiating the coating solution with ultrasonic waves, and jetting the coating solution uniformly and parallel to the bottom of the coating solution tank through a jet nozzle at the tank bottom and from the side of the tank on which the coating solution overflows toward the side opposite it at the bottom of the tank, the ultrasonic waves ranging in frequency from 1 to 100 KHz and in strength from 0.2 to 2 w/cm 2 , and the flow velocity of the coating solution within the coating solution tank ranging from 2 to 100 cm/sec.
Claim 2
Dependent Claim
139 words
In the dip-coating method for obtaining a coated film on the surface of an article by circulating a coating solution in a tank, dipping the article in the solution and then pulling the article up out of the coating solution, the improvement which comprises irradiating the coating solution with ultrasonic waves, and jetting the coating solution uniformly and parallel to the bottom of the coating solution tank through a jet nozzle at the tank bottom and from the side of the tank on which the coating solution overflows toward the side opposite it at the bottom of the tank, the ultrasonic waves ranging in frequency from 1 to 100 KHz and in strength from 0.2 to 2 w/cm 2 , and the flow velocity of the coating solution within the coating solution tank ranging from 2 to 100 cm/sec.
Claim 3
Dependent Claim
79 words
A dip-coating method according to claim 1 wherein, the length of the coating solution tank in the direction in which the coating solution flows on the rectangular solution surface of the coating solution tank is not larger than 3 times the depth of the coating solution tank, the coating solution is jetted at the tank bottom and only from the side on which the coating solution overflows, and the ultrasonic waves are irradiated from the bottom of the tank.
Claim 4
Dependent Claim
80 words
A dip-coating method according to claim 1, wherein, the length of the coating solution tank in the direction in which the coating solution flows on the rectangular solution surface of the coating solution tank exceeds 3 times the depth of the coating solution tank, the coating solution is jetted at the tank bottom from both the side on which the coating solution overflows and the side opposite it and the ultrasonic waves are irradiated from the bottom of the tank.
Claim 5
Dependent Claim
31 words
A dip-coating method according to claim 1, wherein, one article is dipped in the coating solution, and the ultrasonic waves are irradiated from the side wall of the coating solution tank.
References Cited (Backward Citations)
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US2554803A
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FR1055634A
Cited
DE1067657B
Cited
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Cited
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Cited
US3538886A
Cited
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Cited
US4046105A
Cited
FR2357312B1
Cited
US4199421A
Cited
DE2718758A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |