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Patent US4525392A successfully refreshed from Google Patents.
US4525392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of simultaneously applying multiple layers to web
Assignee: Fujifilm Holdings Corp
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Filing: 1982-10-18
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Granted: 1985-06-25
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Expires: 2002-10-18
Abstract
Abstract A method of simultaneously applying multiple layers of coating liquids to a moving web with a slide hopper type coating apparatus in which the fluidity of a coating liquid for forming the lowermost of multiple layers is improved to thereby eliminate inter-layer mixing and waving. The first coating liquid which forms the lowermost of the multiple layers is prepared so that it, when run at a low shear rate, has a viscosity equal to or different by no more than ±10 cp from a viscosity of a second coating liquid for forming a layer next to the lowermost layer when the second coating liquid flows at a low shear rate and that the first coating liquid, when run at a high shear rate, has a viscosity lower than the viscosity of the second coating liquid when the second coating liquid flows at a high shear rate. The first and second liquids are then applied to a moving web with the slide hopper type coating apparatus.
Inventors
- 👤 Keiichi Ishizaki
- 👤 Shuzo Fuchigami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:15
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/34; B05C; B05C5/00; B05C5/007; G; G03; G03C; G03C1/00; G03C1/74; B05C9/00; B05C9/06; G03C2001/7481; G03C2001/7492; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A method of simultaneously applying multiple layers of coating liquids to a moving web with a slide hopper type coating apparatus comprising the steps of: preparing a first coating liquid for forming the lowermost of said multiple layers so that said first coating liquid, when run at a low shear rate, has a viscosity equal to or different by no more than ±10 cp from a viscosity of a second coating liquid for forming a layer next to said lowermost layer when said second coating liquid flows at a low shear rate, and that said first coating liquid, when run at a high shear rate has a viscosity lower than a viscosity of said second coating liquid when said second coating liquid flows at a high shear rate; and applying said first and second liquids to said moving web with said slide hopper type coating apparatus.
Claim 2
Independent Claim
146 words
A method of simultaneously applying multiple layers of coating liquids to a moving web with a slide hopper type coating apparatus comprising the steps of: preparing a first coating liquid for forming the lowermost of said multiple layers so that said first coating liquid, when run at a low shear rate, has a viscosity equal to or different by no more than ±10 cp from a viscosity of a second coating liquid for forming a layer next to said lowermost layer when said second coating liquid flows at a low shear rate, and that said first coating liquid, when run at a high shear rate has a viscosity lower than a viscosity of said second coating liquid when said second coating liquid flows at a high shear rate; and applying said first and second liquids to said moving web with said slide hopper type coating apparatus.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said first coating liquid is non-Newtonian.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said step of preparing said first coating liquid comprises adding a viscosity-varying agent to said first coating liquid.
Claim 5
Independent Claim
151 words
A method of simultaneously applying multiple layers of coating liquids to a moving web with a slide hopper coating apparatus comprising the steps of: preparing a first coating liquid for forming a carrier layer for multiple layers wherein said first coating liquid, when run at a low shear rate, has a viscosity equal to or different by no more than ±10 cp from a viscosity of a second coating liquid for forming a layer next to said lowermost carrier layer when said second coating liquid flows at a low shear rate, and that said first coating liquid, when run at a high shear rate, has a viscosity lower than a viscosity of said second coating liquid when said second coating liquid flows at a high shear rate; and applying said first and second liquids together with a third coating liquid to said moving web with said slide hopper type coating apparatus.
Claim 6
Independent Claim
151 words
A method of simultaneously applying multiple layers of coating liquids to a moving web with a slide hopper coating apparatus comprising the steps of: preparing a first coating liquid for forming a carrier layer for multiple layers wherein said first coating liquid, when run at a low shear rate, has a viscosity equal to or different by no more than ±10 cp from a viscosity of a second coating liquid for forming a layer next to said lowermost carrier layer when said second coating liquid flows at a low shear rate, and that said first coating liquid, when run at a high shear rate, has a viscosity lower than a viscosity of said second coating liquid when said second coating liquid flows at a high shear rate; and applying said first and second liquids together with a third coating liquid to said moving web with said slide hopper type coating apparatus.
References Cited (Backward Citations)
US4113903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |