Patent US2710059A successfully refreshed from Google Patents.
US3626832A
Expired / Lapsed
US
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Photographic processing apparatus with liquid level control
Assignee: Agfa Gevaert NV
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Filing: 1969-03-17
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Granted: 1971-12-14
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Expires: 1989-03-17
Abstract
Abstract Photographic processing apparatus including an adjustable overflow conduit for varying the level of a bath of processing liquid and thus the effective processing time for the material, the conduit also including an outlet aperture adjacent the bottom of the liquid bath for discharging the liquid from the bath at a predetermined rate, the liquid from the overflow conduit emptying into a liquid reservoir from which the liquid is recirculated to the processing bath at a rate such that the amount of liquid discharged through the lower outlet opening makes up the bulk of the liquid being recirculated in order to create agitating currents along the bottom of the liquid bath.
Inventors
- 👤 Hans Kappeler
- 👤 Josef Christen
- 👤 Albert Petrus Wagemans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:19
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/007; G03D3/00; G03D3/02; G03D3/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
Processing apparatus for photographic material comprising a tray for processing liquid; guide members for guiding at least one sheet of photographic material along a determined path through the processing liquid in the tray; driving means for transporting the sheet of photographic material at a uniform speed through the processing apparatus; and overflow conduit extending substantially vertically in said tray, a wall of the conduit having an opening therein extending partially around the conduit circumference, the height of said opening being at least equal to the difference between the desired minimum and maximum levels of the liquid in the tray; and adjustable closure means to close this opening to a variable height between said levels.
Claim 2
Dependent Claim
114 words
Processing apparatus for photographic material comprising a tray for processing liquid; guide members for guiding at least one sheet of photographic material along a determined path through the processing liquid in the tray; driving means for transporting the sheet of photographic material at a uniform speed through the processing apparatus; and overflow conduit extending substantially vertically in said tray, a wall of the conduit having an opening therein extending partially around the conduit circumference, the height of said opening being at least equal to the difference between the desired minimum and maximum levels of the liquid in the tray; and adjustable closure means to close this opening to a variable height between said levels.
Claim 3
Dependent Claim
91 words
Processing apparatus according to claim 1 wherein said conduit consists of a tube of quadrilateral cross section, one wall of which is provided with an opening extending from the upper tube rim to at least the desired minimum level of the liquid in the tray, the vertical edges of the wall opening being provided with grooves for the insertion of plates therein, and said closure means comprises a plurality of plates for insertion in the grooved edges of said opening to vary the height of the lower edge of said opening.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |