Patent US4440811A successfully refreshed from Google Patents.
US4440811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating and an apparatus for coating
Assignee: Konica Minolta Inc
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Filing: 1982-02-11
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Granted: 1984-04-03
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Expires: 2002-02-11
Abstract
Abstract An improved method of coating one or more layer of a coating liquid onto a moving substrate from a coating hopper wherein coating bead of the coating liquid is formed and a part of the bead is formed at a side of entering of the substrate with respect to an efflux end of the coating hopper, and an end of the part of the bead being in contact with the coating hopper is held at a fixed position.
Inventors
- 👤 Yosatomi Hitaka
- 👤 Takemasa Namiki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:54
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; B; B05; B05C; B05C5/00; B05C5/007; B05C5/02; B05C5/0254; B05C9/00; B05C9/06; G03C2001/7411; G03C2001/7466; G03C2001/7477
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
A method for reducing streak defects during the coating of one or more layers of a coating liquid onto a moving substrate from a coating hopper having a coating surface comprising the steps of: supplying a coating liquid from an efflux end of a coating hopper as a layer; forming a bead of the supplied coating liquid, said bead bridging the coating hopper and the substrate with part of said bead formed at an entering side of the substrate relative to the efflux end and an end of said bead at the entering side in contact with the hopper; holding said end of said bead at a liquid end-holding portion of a liquid puddle arranged on the coating hopper, said liquid end-holding portion being formed on said coating surface of the coating hopper by notching said coating surface, said notched coating surface containing an interfering surface substantially perpendicular to the flow of said layer of coating liquid, said interfering surface interfering with the flow of said layer of coating liquid; and moving the substrate in contact with the coating liquid so that the substrate is coated with the coating liquid.
Claim 2
Independent Claim
190 words
A method for reducing streak defects during the coating of one or more layers of a coating liquid onto a moving substrate from a coating hopper having a coating surface comprising the steps of: supplying a coating liquid from an efflux end of a coating hopper as a layer; forming a bead of the supplied coating liquid, said bead bridging the coating hopper and the substrate with part of said bead formed at an entering side of the substrate relative to the efflux end and an end of said bead at the entering side in contact with the hopper; holding said end of said bead at a liquid end-holding portion of a liquid puddle arranged on the coating hopper, said liquid end-holding portion being formed on said coating surface of the coating hopper by notching said coating surface, said notched coating surface containing an interfering surface substantially perpendicular to the flow of said layer of coating liquid, said interfering surface interfering with the flow of said layer of coating liquid; and moving the substrate in contact with the coating liquid so that the substrate is coated with the coating liquid.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein the substrate is a photographic support.
Claim 4
Dependent Claim
16 words
A method according to claim 1 wherein the coating liquid has a viscosity of 2-150 cp.
References Cited (Backward Citations)
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Cited
US3413143A
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US3749053A
Cited
US3993019A
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US3996885A
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US3958532A
Cited
US4143187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |