Patent US3721175A successfully refreshed from Google Patents.
US3721175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic processing apparatus
Assignee: Individual
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Filing: 1971-07-02
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Granted: 1973-03-20
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Expires: 1991-07-02
Abstract
Abstract A photographic sheet material processing apparatus wherein, in one embodiment, the apparatus comprises a platen which may be tilted to present an inclined surface. A solution applicator channel, flush with the surface of the platen, extends thereacross and communicates with a solution chamber. A pump is provided for forcing processing solutions into the chamber and through the applicator channel. Solution flow modifying members are provided between the chamber and the applicator channel in order to assure that the solution flows in a uniform stream over the active surface of the platen. The material to be processed is placed emulsion side down over the platen and positioned to extend above and beyond the applicator channel. In another embodiment, the platen is of arcuate shape and is placed in an upright position.
Inventors
- 👤 S Needleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:03
CPC Classifications
G; G03; G03D; G03D3/00; G03D3/02; G03D3/06; G03C; G03C5/00; G03C5/26; G03C5/261; G03D13/00; G03D13/02; G03D13/04; G03D5/00; G03D5/003; G03D5/006; G03D5/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
Apparatus for processing photographic sheet material comprising a platen of oblong configuration, means for supporting said platen at an acute angle so as to present an inclined surface, a channel having walls extending transverse to said platen, a solution applicator chamber communicating with said channel, pump means forcing processing solution into said chamber, dual solution flow modifying means between said channel and said chamber comprising a plurality of pressure equalizing Venturi tubes distributed in the direction extending axially to said chamber, said tubes being of progressively varying diameter having flared ends facing said chamber, and a series of plates of U-shaped configuration distributed in the direction axial to said chamber and extending transverse thereto, whereby the flow of liquid from said channel over said platen is substantially uniform and transverse bar means for holding the sheet material to be processed over said platen in a position overlying said channel.
Claim 2
Dependent Claim
149 words
Apparatus for processing photographic sheet material comprising a platen of oblong configuration, means for supporting said platen at an acute angle so as to present an inclined surface, a channel having walls extending transverse to said platen, a solution applicator chamber communicating with said channel, pump means forcing processing solution into said chamber, dual solution flow modifying means between said channel and said chamber comprising a plurality of pressure equalizing Venturi tubes distributed in the direction extending axially to said chamber, said tubes being of progressively varying diameter having flared ends facing said chamber, and a series of plates of U-shaped configuration distributed in the direction axial to said chamber and extending transverse thereto, whereby the flow of liquid from said channel over said platen is substantially uniform and transverse bar means for holding the sheet material to be processed over said platen in a position overlying said channel.
Claim 3
Dependent Claim
37 words
Apparatus in accordance with claim 1 wherein said bar means comprises a pair of longitudinally extending members displaceable in a position transverse to said platen and positioned in slots provided in the side walls of the apparatus.
Claim 4
Dependent Claim
30 words
Apparatus in accordance with claim 2 wherein one of said bar means has a bottom surface covered with a multicellular spongy substance permitting the flow of liquid over said platen.
Claim 5
Dependent Claim
40 words
Apparatus in accordance with claim 2 wherein one of said bar means is normally resiliently supported over said platen clearing the sheet material to be processed and adapted to be positioned over said platen and depressed to contact said material.
References Cited (Backward Citations)
US979858A
Cited
US2168997A
Cited
US2986988A
Cited
US3097584A
Cited
US3192846A
Cited
US3166999A
Cited
US3427949A
Cited
US3610131A
Cited
US3555990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |