GB668483A - Apparatus for developing photographic materials by means of a gas - Google Patents
Apparatus for developing photographic materials by means of a gasInfo
- Publication number
- GB668483A GB668483A GB156/50A GB15650A GB668483A GB 668483 A GB668483 A GB 668483A GB 156/50 A GB156/50 A GB 156/50A GB 15650 A GB15650 A GB 15650A GB 668483 A GB668483 A GB 668483A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- developing
- gas
- roller
- perforated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B27/00—Photographic printing apparatus
- G03B27/02—Exposure apparatus for contact printing
- G03B27/14—Details
- G03B27/30—Details adapted to be combined with processing apparatus
- G03B27/303—Gas processing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
- G03D7/00—Gas processing apparatus
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
668,483. Photographic gas developing apparatus. CELLOPHANE SOC. ANON. Jan. 3, 1950 [Feb. 1, 1949], No. 156/50. Class 98 (ii). The apparatus comprises a chamber to which is supplied or in which is generated a developing gas, and which has two perforated side walls converging towards the bottom in smooth curves, an endless conveyer belt for the light sensitive material to be developed which passes over the two perforated faces, and a guide roller for said belt rotatably mounted in a recess formed in the bottom wall of the chamber between the two perforated walls. As shown, the material to be developed typically diazotype paper prints prepared in a contact printer having a transparent cylinder 18 with a central light source 20, is fed to the developing machine at 6 through which it is moved by an endless belt driven by rollers A, B, the roller B being the more slowly driven, the belt passing over a roller 25 in a recess 23 in the chamber between the adjacent boundaries of the curved perforated faces. To ensure smooth passage of the paper across the gap between these faces and the roller, fingers 24 are formed on the chamber walls adjacent the recess and extend into grooves in the roller. The developing gas is generated by heating an aqueous ammonia solution in a drip-fed well 8 with an electric element 9, and electric heaters 10, 11 are provided to maintain the gas at the desired temperature. The developed paper is de-odorized by passage over a heated plate 12 outside the developing chamber, and/or by the provision of a compartment 14, including a portion of the second perforated face of the developing chamber but isolated from the rest of the chamber, through which fresh air is circulated.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR984011T | 1949-02-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB668483A true GB668483A (en) | 1952-03-19 |
Family
ID=9536424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB156/50A Expired GB668483A (en) | 1949-02-01 | 1950-01-03 | Apparatus for developing photographic materials by means of a gas |
Country Status (4)
Country | Link |
---|---|
US (1) | USB253666I5 (en) |
FR (1) | FR984011A (en) |
GB (1) | GB668483A (en) |
NL (1) | NL72197C (en) |
-
0
- NL NL72197D patent/NL72197C/xx active
- US US253666D patent/USB253666I5/en active Pending
-
1949
- 1949-02-01 FR FR984011D patent/FR984011A/en not_active Expired
-
1950
- 1950-01-03 GB GB156/50A patent/GB668483A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR984011A (en) | 1951-07-02 |
NL72197C (en) | |
USB253666I5 (en) |
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