US4842900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for coating
Assignee: Fujifilm Holdings Corp
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Filing: 1987-02-12
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Granted: 1989-06-27
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Expires: 2007-02-12
Abstract
Abstract A method and apparatus for coating a liquid coating composition to a moving web in which air entrained on the web is replaced by a gas having a higher solubility than air in the liquid coating composition. The moving web is exposed to the gas immediately before it arrives at a die through which the liquid coating composition is applied to the web. A vacuum system may be used to remove the air from the web prior to its exposure to the gas.
Inventors
- 👤 Kimiaki Miyamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:36
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/30; B05D1/305; B05C; B05C5/00; B05C5/007; B05C5/008; B05C5/02; B05C5/0254; B32; B32B; B32B37/00; B32B37/0007; G; G03; G03C; G03C1/00; G03C1/74; B05C9/00; B05C9/06; B05D3/00; B05D3/04; B05D3/0466; B32B2309/00; B32B2309/60; B32B2309/66; G03C2001/7433; G03C2001/7485; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
120 words
A coating method, comprising the steps of: moving a web over a slit of a die from a first side of said die; flowing a liquid coating composition through said slit onto said moving web to form a layer on a first surface of said web; and exposing said first surface of said web proximate to said first side of said die to a gas substantially more soluble in said liquid coating composition than air to displace air in contact with said first surface of said moving web upstream of said die slit such that the gas having higher solubility than that of air instantly dissolves in the liquid when entrained to thereby prevent residual bubbles in said coating composition.
Claim 2
Dependent Claim
120 words
A coating method, comprising the steps of: moving a web over a slit of a die from a first side of said die; flowing a liquid coating composition through said slit onto said moving web to form a layer on a first surface of said web; and exposing said first surface of said web proximate to said first side of said die to a gas substantially more soluble in said liquid coating composition than air to displace air in contact with said first surface of said moving web upstream of said die slit such that the gas having higher solubility than that of air instantly dissolves in the liquid when entrained to thereby prevent residual bubbles in said coating composition.
Claim 3
Dependent Claim
23 words
A coating method as recited in claim 1, wherein said exposing step exposes said first surface of said web in a restricted area.
Claim 4
Dependent Claim
15 words
A coating method as recited in claim 1, wherein said gas substantially comprises carbon dioxide.
Claim 5
Dependent Claim
18 words
A coating method as recited in claim 2, wherein said liquid coating composition contains a gelatin aqueous solution.
Claim 6
Dependent Claim
18 words
A coating method as recited in claim 3, wherein said liquid coating composition contains a gelatin aqueous solution.
Claim 7
Dependent Claim
19 words
A coating method as recited in claim 2, wherein said liquid coating composition substantially consists of an organic solvent.
Claim 8
Dependent Claim
19 words
A coating method as recited in claim 3, wherein said liquid coating composition substantially consists of an organic solvent.
Claim 9
Dependent Claim
94 words
A coating method, comprising the steps of: moving a web over a slit of a die from a first side of said die; flowing a liquid coating composition through slit onto said moving web to form a layer on a first surface of said web; and exposing said first surface of said web on said first side of said die to a gas substantially more soluble in said liquid coating composition than air via a replacement chamber immediately before said liquid is applied onto said web so that occurrence of minute bubbles is prevented.
Claim 10
Dependent Claim
94 words
A coating method, comprising the steps of: moving a web over a slit of a die from a first side of said die; flowing a liquid coating composition through slit onto said moving web to form a layer on a first surface of said web; and exposing said first surface of said web on said first side of said die to a gas substantially more soluble in said liquid coating composition than air via a replacement chamber immediately before said liquid is applied onto said web so that occurrence of minute bubbles is prevented.
Claim 11
Dependent Claim
15 words
A coating method as recited in claim 8, wherein said gas substantially comprises carbon dioxide.
Claim 12
Dependent Claim
18 words
A coating method as recited in claim 8, wherein said liquid coating composition contains a gelatin aqueous solution.
Claim 13
Dependent Claim
18 words
A coating method as recited in claim 9, wherein said liquid coating composition contains a gelatin aqueous solution.
Claim 14
Dependent Claim
19 words
A coating method as recited in claim 8, wherein said liquid coating composition substantially consists of an organic solvent.
Claim 15
Dependent Claim
19 words
A coating method as recited in claim 9, wherein said liquid coating composition substantially consists of an organic solvent.
References Cited (Backward Citations)
JPS4832923A
Cited
JPS5920366B2
Cited
US4384015A
Cited
JPS56108566A
Cited
GB2070459A
Cited
US4525392A
Cited
US4548837A
Cited
US4560590A
Cited
US4576109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |