GB693426A - Improvements in or relating to devices for feeding tapes - Google Patents
Improvements in or relating to devices for feeding tapesInfo
- Publication number
- GB693426A GB693426A GB10350/49A GB1035049A GB693426A GB 693426 A GB693426 A GB 693426A GB 10350/49 A GB10350/49 A GB 10350/49A GB 1035049 A GB1035049 A GB 1035049A GB 693426 A GB693426 A GB 693426A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roller
- film
- rollers
- loop
- length
- 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
- G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
- G03D13/00—Processing apparatus or accessories therefor, not covered by groups G11B3/00 - G11B11/00
- G03D13/003—Film feed or extraction in development apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
- G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
- G03D3/08—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material
- G03D3/13—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for long films or prints in the shape of strips, e.g. fed by roller assembly
- G03D3/135—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for long films or prints in the shape of strips, e.g. fed by roller assembly fed between chains or belts, or with a leading strip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Abstract
693,426. Photographic contact-printing and developing apparatus. PHILIPS ELECTRICAL, Ltd. April 19, 1949 [April 20, 1948], No. 10350/49. Class 98 (ii). [Also in Group XVI] In apparatus for feeding tapes 1 of limited elasticity, e.g. photographic films of regenerated cellulose having a thickness of the order of tens of microns, through a treatment apparatus 4, and comprising a feed-roller 6 and a draw-off roller 7 having substantially equal peripheral speeds, means are provided operated by the variation of a loop 13 in the tape to stretch the tape varying amounts by controlling the tension of the tape and thus maintain constant the length of tape between the rollers 6, 7. As shown in Fig. 1, a film 1 is fed under constant tension from a reel 5, between felt pads 15, 16 constituting the tension control-device, over the roller 6 in contact with a negative film 9 to be copied on the film 1 by exposure to a light source 11, and through a developing and drying- apparatus 4 to the draw-off roller 7. Between the roller 6 and the apparatus 4, a floating roller 14d engages a loop 13 in the film and is carried by a lever 14b supported by one spring 14c and connected by another spring 14c to a lever 14a carrying the upper pad 16. Variation of the loop length due to a slight difference in the peripheral speeds of the rollers 6, 7 or to variations in the film length caused by the treatment in the apparatus 4, alters the friction force at 15, 16 to restore the loop to its original length; thus the film length between the rollers 6, 7 is maintained constant, and the film after leaving the apparatus 4 is immediately ready for projection if required. The pads 15. 16 may act on the film between the rollers 6, 7, i.e. adjacent to the roller 7 or between two of the guide rollers 2 of the apparatus 4, in which case increase of loop length causes decrease of the friction force exerted by the pads 15, 16 and vice versa, in contrast to the arrangement shown in Fig. 1, where the reverse takes place. According to the Specification as open to inspection under Sect. 91, the movements of the lever 14b may control the pressure of a leafspring on the periphery of one of the rollers 2, the roller being in the form of a hollow cylinder freely mounted on a driven spindle. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL693426X | 1948-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB693426A true GB693426A (en) | 1953-07-01 |
Family
ID=19808794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10350/49A Expired GB693426A (en) | 1948-04-20 | 1949-04-19 | Improvements in or relating to devices for feeding tapes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB693426A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371749A (en) * | 2010-08-12 | 2012-03-14 | 林雅发 | Air-float type film turning device used for once double-side intaglio printing of film |
-
1949
- 1949-04-19 GB GB10350/49A patent/GB693426A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371749A (en) * | 2010-08-12 | 2012-03-14 | 林雅发 | Air-float type film turning device used for once double-side intaglio printing of film |
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