US4332840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating method
Assignee: Fujifilm Holdings Corp
•
Filing: 1980-07-23
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Granted: 1982-06-01
•
Expires: 2000-07-23
Abstract
Abstract Method and apparatus for coating a web with a magnetic coating liquid in which the coating is applied exceedingly uniformly. The web to be coated is continuously transported past a nozzle in an extrusion-type coating unit with the magnetic coating liquid discharged through the nozzle and wherein: (a) V 0 >0.3 m/sec, (b) 3 m/sec>V 1 >0.1 m/sec, (c) 3>V 1 /V 0 , and (d) 15 cm>d>0.2 cm where V 0 is the coating liquid discharge speed at the nozzle of the extrusion-type coating unit, V 1 is the coating liquid striking speed at the surface of the web, and d is the distance between the nozzle and the surface of the web.
Inventors
- 👤 Yasunori Tanaka
- 👤 Shinji Noda
- 👤 Hiroshi Chikamasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:01
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/84; G11B5/848; B; B05; B05C; B05C5/00; B05C5/02; B05C5/0283; B05D; B05D1/00; B05D1/26; B05D1/265; B05D1/28; B05D1/40; B05D1/42; G03; G03C; G03C1/00; G03C1/74; G03C2001/7459
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
105 words
A method for coating a web comprising the steps of: continuously transporting a web to be coated past a nozzle in an extrusion-type coating unit; and discharging a magnetic coating liquid through said nozzle onto said web, wherein: (a) V 0 >0.3 m/sec, (b) 3 m/sec>V 1 >0.1 m/sec, (c) 3>V 1 /V 0 , and (d) 15 cm>d>0.2 cm where V 0 is the coating liquid discharge speed at said nozzle of said extrusion-type coating unit, V 1 is the coating liquid striking speed at the surface of said web, and d is the distance between said nozzle and said surface of said web.
Claim 2
Independent Claim
105 words
A method for coating a web comprising the steps of: continuously transporting a web to be coated past a nozzle in an extrusion-type coating unit; and discharging a magnetic coating liquid through said nozzle onto said web, wherein: (a) V 0 >0.3 m/sec, (b) 3 m/sec>V 1 >0.1 m/sec, (c) 3>V 1 /V 0 , and (d) 15 cm>d>0.2 cm where V 0 is the coating liquid discharge speed at said nozzle of said extrusion-type coating unit, V 1 is the coating liquid striking speed at the surface of said web, and d is the distance between said nozzle and said surface of said web.
Claim 3
Dependent Claim
55 words
The method as claimed in claim 1 further comprising the steps of: removing excessive amounts of coating liquid from the surface of said web at a position which is independent of a coating section and downstream of said coating section after said web has been coated with said coating liquid under conditions (a) through (d).
Claim 4
Dependent Claim
44 words
The method as claimed in claim 2 further comprising the steps of smoothing a film formed on said web by coating said web with said coating liquid at least once before or after said excessive amount of coating liquid is removed from said web.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein V 0 >0.4 m/sec.
Claim 6
Dependent Claim
10 words
The method of claim 1 wherein V 0 >0.5 m/sec.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein 2.5>V 1 /V 0 .
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein 2>V 1 /V 0 .
Claim 9
Dependent Claim
11 words
The method of claim 1 wherein 2.5 m/sec>V 1 >0.15 m/sec.
Claim 10
Dependent Claim
11 words
The method of claim 1 wherein 2 m/sec>V 1 >0.2 m/sec.
Claim 11
Dependent Claim
9 words
The method of claim 1 wherein 10 cm>d>0.3 cm.
Claim 12
Dependent Claim
9 words
The method of claim 1 wherein 5 cm>d>0.5 cm.
Claim 13
Dependent Claim
22 words
The method of claim 1 wherein the slit width of said nozzle is within a range of 2 mm to 0.03 mm.
References Cited (Backward Citations)
US4038442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |