Patent US4641941A successfully refreshed from Google Patents.
US4641941A
Expired / Lapsed
US
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Treatment tank in photosensitive material processing system including a plurality of overflow devices
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1985-07-29
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Granted: 1987-02-10
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Expires: 2005-07-29
Abstract
Abstract A treatment tank in photosensitive material processing system or the like is equipped with a plurality of overflow devices and a partition member for separating liquid surface part extending at least to one overflow device from the other, below the liquid surface with at least one opening or gap allowing the treatment liquid to flow from side of the partition, and with the partition member solution in the middle and deep region of the tank passes through the opening or gap to flow over insoluble solids being suspended therein.
Inventors
- 👤 Yasuhito Yoshimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:03
CPC Classifications
G; G03; G03D; G03D3/00; G03D3/02; G03D13/00; G03D13/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
A treatment tank for use in a photosensitive material processing system of the type in which treatment liquid is fed into said treatment tank through a liquid feeding device, and the liquid level of said tank is kept constant by way of overflow, comprising, in said treatment tank, a plurality of overflow devices, and a partition member for a separating the part of the surface of the treatment liquid which extends to at least one of said overflow devices from the part of the surface of the treatment liquid which extends to the remaining overflow devices, said partition member allowing treatment liquid to flow from one side thereof to the other side thereof below the liquid surface.
Claim 2
Dependent Claim
117 words
A treatment tank for use in a photosensitive material processing system of the type in which treatment liquid is fed into said treatment tank through a liquid feeding device, and the liquid level of said tank is kept constant by way of overflow, comprising, in said treatment tank, a plurality of overflow devices, and a partition member for a separating the part of the surface of the treatment liquid which extends to at least one of said overflow devices from the part of the surface of the treatment liquid which extends to the remaining overflow devices, said partition member allowing treatment liquid to flow from one side thereof to the other side thereof below the liquid surface.
Claim 3
Dependent Claim
49 words
A treatment tank as defined in claim 1, wherein said partition member is spaced from the bottom of said treatment tank to create a gap through which treatment liquid is allowed to flow from one side of said partition member to the other side thereof below the liquid surface.
Claim 4
Dependent Claim
47 words
A treatment tank as defined in claim 1, wherein said partition member is provided, below the surface of the treatment liquid, with at least one opening therein through which treatment fluid is allowed to flow from one side of said partition member to the other side thereof.
Claim 5
Dependent Claim
43 words
A treatment tank as defined in any of claims 1 through 3, wherein the bottom of said treatment tank is provided with a sediment collecting recess near one of said overflow devices, and a normally closed drain valve is installed in said recess.
Claim 6
Dependent Claim
19 words
A treatment tank as defined in claim 4, wherein the bottom of said tank is sloped toward said recess.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |