GB483014A - Improvements in or relating to devices for compensating for the shrinkage of films - Google Patents
Improvements in or relating to devices for compensating for the shrinkage of filmsInfo
- Publication number
- GB483014A GB483014A GB27345/36A GB2734536A GB483014A GB 483014 A GB483014 A GB 483014A GB 27345/36 A GB27345/36 A GB 27345/36A GB 2734536 A GB2734536 A GB 2734536A GB 483014 A GB483014 A GB 483014A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- drum
- shrinkage
- point
- roller
- 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
- G03B27/10—Copying apparatus with a relative movement between the original and the light source during exposure
Abstract
483,014. Photographic contact-printing apparatus. KLANGFILM GES. Oct. 8, 1936, No. 27345. Convention date, Oct. 16, 1935. [Class 98 (ii)] A constant feed of film in spite of film shrinkage is obtained by forming a loop on both sides of the film in contact with a smooth driving roller so that the variation in length of one side of the loop due to shrinkage, affects the curvature of the film at the driving point, and varies the amount of film fed forward. A negative film 14 to be copied is led from a drum 1 over a toothed roller 5, between a driven roller 19 and a pressure roller 10, through braking rollers 11, 12 and again over the toothed roller 5 to the take-up drum 2. The positive film 13 is led from the drum 2 over rollers 5, 17, 16, 19, 15 and 18 to the drum 4. The exposure takes place at the place 21. A loop A, B is formed in the film 14 owing to the presence of a braking point 26. When shrinkage occurs in the film, the feed at the point 25 is in excess of that fed at the sprockets 4, and the loops A, B tend to decrease and increase respectively. This increases the curvature of the film at the point 25 whereby less film is fed forward The necessary positions of the rollers 10, 11, 12 are defined.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE483014X | 1935-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB483014A true GB483014A (en) | 1938-04-08 |
Family
ID=6542913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27345/36A Expired GB483014A (en) | 1935-10-16 | 1936-10-08 | Improvements in or relating to devices for compensating for the shrinkage of films |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB483014A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2586286A (en) * | 1948-04-03 | 1952-02-19 | Technicolor Motion Picture | Film registering and printing apparatus |
| US2616344A (en) * | 1948-11-24 | 1952-11-04 | Warren R Patience | Roller printer |
-
1936
- 1936-10-08 GB GB27345/36A patent/GB483014A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2586286A (en) * | 1948-04-03 | 1952-02-19 | Technicolor Motion Picture | Film registering and printing apparatus |
| US2616344A (en) * | 1948-11-24 | 1952-11-04 | Warren R Patience | Roller printer |
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