US3890629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for developing photographic film or paper
Assignee: Individual
•
Filing: 1973-08-16
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Granted: 1975-06-17
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Expires: 1993-08-16
Abstract
Abstract In a device for developing photographic material, such as photographic film or paper, a tank containing a drum arranged for immersing the said material in developing chemicals in the tank, and a plurality of reservoirs for the said chemicals are all immersed in a thermostatically controlled water jacket. Transverse barrier walls can be erected to divide the tank up into predetermined lengths depending on the length of the photographic material to be developed. The supply to, and discharge from, the tank of the liquid developing chemicals are controlled by suitable valves.
Inventors
- 👤 Heinrich Huss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:44
CPC Classifications
G; G03; G03D; G03D3/00; G03D3/02; G03D13/00; G03D13/006; G03D13/02; G03D13/04; G03D13/046; G03D3/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
A device for developing photographic material comprising: a housing forming an elongated tank providing a lightimpermeable developing chamber therein; a drum in said tank rotatable about a horizontal axis for immersing photographic material therein; a plurality of reservoirs for chemicals for use in a photographic process disposed in said housing adjacent said tank; conduit means providing fluid communication between the tank and said reservoirs; a water jacket enclosing said tank, said conduit means and said reservoirs for heat exchange through said tank and said reservoirs between chemicals therein and water of said jacket; a temperature-control device for maintaining the temperature of said water jacket constant, the floor of said tank being arcuate and provided with a pair of spaced apart longitudinal beads; and a barrier wall disposed in and transversely of the tank with opposite corners of the barrier wall tucked clampingly under said beads.
Claim 2
Independent Claim
145 words
A device for developing photographic material comprising: a housing forming an elongated tank providing a lightimpermeable developing chamber therein; a drum in said tank rotatable about a horizontal axis for immersing photographic material therein; a plurality of reservoirs for chemicals for use in a photographic process disposed in said housing adjacent said tank; conduit means providing fluid communication between the tank and said reservoirs; a water jacket enclosing said tank, said conduit means and said reservoirs for heat exchange through said tank and said reservoirs between chemicals therein and water of said jacket; a temperature-control device for maintaining the temperature of said water jacket constant, the floor of said tank being arcuate and provided with a pair of spaced apart longitudinal beads; and a barrier wall disposed in and transversely of the tank with opposite corners of the barrier wall tucked clampingly under said beads.
Claim 3
Independent Claim
264 words
A device for developing photographic material, comprising: a housing including an elongated tank providing a light-impermeable developing chamber; a drum in said tank rotatable about a horizontal axis for immersing photographic material therein; a plurality of reservoirs adjacent said tank for chemicals for use in a photographic developing process; a conduit means providing fluid communication between said tank and said reservoirs; a water jacket enclosing said tank, said conduit means and said reservoirs for heat exchange through walls of the tank and the reservoirs between chemicals Therein and water of said jacket, said tank having a floor which is arcuate and conforms to the curvature of said drum along a lower portion thereof while reaching upwardly to a location above the top of said drum but within said water jacket; a temperature-control device for keeping the temperature of said water jacket constant, said conduit means including valves for said reservoirs enclosed in said water jacket; said conduit means including a manifold conduit, the floors of the reservoirs being disposed at a higher level than the bottom of said tank, the manifold conduit being arranged to open into the tank; and an inlet valve for the water of the water jacket, said inlet valve opening at one side into said water jacket and on another side into the manifold conduit for said reservoirs, said floor of said tank being formed with a pair of spaced apart longitudinal beads, said device further comprising a barrier wall disposed in and extending transversely of the tank with opposite corners of the barrier wall clampingly tucked under said beads.
Claim 4
Independent Claim
264 words
A device for developing photographic material, comprising: a housing including an elongated tank providing a light-impermeable developing chamber; a drum in said tank rotatable about a horizontal axis for immersing photographic material therein; a plurality of reservoirs adjacent said tank for chemicals for use in a photographic developing process; a conduit means providing fluid communication between said tank and said reservoirs; a water jacket enclosing said tank, said conduit means and said reservoirs for heat exchange through walls of the tank and the reservoirs between chemicals Therein and water of said jacket, said tank having a floor which is arcuate and conforms to the curvature of said drum along a lower portion thereof while reaching upwardly to a location above the top of said drum but within said water jacket; a temperature-control device for keeping the temperature of said water jacket constant, said conduit means including valves for said reservoirs enclosed in said water jacket; said conduit means including a manifold conduit, the floors of the reservoirs being disposed at a higher level than the bottom of said tank, the manifold conduit being arranged to open into the tank; and an inlet valve for the water of the water jacket, said inlet valve opening at one side into said water jacket and on another side into the manifold conduit for said reservoirs, said floor of said tank being formed with a pair of spaced apart longitudinal beads, said device further comprising a barrier wall disposed in and extending transversely of the tank with opposite corners of the barrier wall clampingly tucked under said beads.
Claim 5
Dependent Claim
39 words
The device defined in claim 2, wherein said inlet valve is a two-position further valve connecting the interior of said tank with said water jacket, said conduit means including a discharge valve and discharge conduit communicating with said tank.
Claim 6
Dependent Claim
71 words
The device defined in claim 2 further comprising overflow orifice means on said tank spaced from the floor thereof, an overflow conduit opening into said orifice means, a discharge valve, and a tank-discharge conduit, said overflow orifice means opening into said tank-discharge conduit via said overflow conduit downstream of said discharge valve, said manifold conduit opening into said tank in such manner as to produce an arcuate current of liquid therein.
Claim 7
Dependent Claim
39 words
The device defined in claim 2, further comprising an elastomeric sealing element adapted to receive a marginal region of said barrier wall facing said tank, said elastomeric element having a pair of sealing lips substantially contiguous with the tank.
Claim 8
Dependent Claim
22 words
The device defined in claim 5 wherein said corners of said barrier wall are divided by terminal regions of said sealing element.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |