GB828531A - Improvements relating to photographic printing apparatus - Google Patents
Improvements relating to photographic printing apparatusInfo
- Publication number
- GB828531A GB828531A GB2477954A GB2477954A GB828531A GB 828531 A GB828531 A GB 828531A GB 2477954 A GB2477954 A GB 2477954A GB 2477954 A GB2477954 A GB 2477954A GB 828531 A GB828531 A GB 828531A
- Authority
- GB
- United Kingdom
- Prior art keywords
- curve
- blanket
- cylinder
- printing apparatus
- photographic printing
- 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
- G03B27/18—Maintaining or producing contact pressure between original and light-sensitive material
- G03B27/22—Maintaining or producing contact pressure between original and light-sensitive material by stretching over a curved surface
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Abstract
828,531. Photographic printing apparatus. WENDER, E. J. March 26, 1866 [Dec. 25, 1954], No. 24779/54. Class 98(2) A rigid transparent curve or cylinder 15 with internal light source 11 has a resilient pressure blanket 16 formed mainly of a natural curvature of greater redius than that of the curve or cylinder secured at one end against or adjacent the outer surface thereof and provided at its other end with fastening means such as a rod with projecting ends 18 to engages,catches 19 and hold the blanket and, when present. copy material against the curve or cylinder. When the latter is used it may be carried by uprights 13 provided from a base 10, the uprights being preferably formed as reflectors for uniformity of exposure at the edges of the prints. The blanket 16 may be of metal for example aluminum alloy and may have resilient lining 21 as of foamed elastic material. A timing switch 12 as of Specification 828,532 [Group XXXVII] may be mounted on the base.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2477954A GB828531A (en) | 1954-12-25 | 1954-12-25 | Improvements relating to photographic printing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2477954A GB828531A (en) | 1954-12-25 | 1954-12-25 | Improvements relating to photographic printing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB828531A true GB828531A (en) | 1960-02-17 |
Family
ID=10217133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2477954A Expired GB828531A (en) | 1954-12-25 | 1954-12-25 | Improvements relating to photographic printing apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB828531A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3289562A (en) * | 1965-05-24 | 1966-12-06 | Reeves Ind Inc | Holder for exposure station of document copier |
EP0006251A1 (en) * | 1978-04-24 | 1980-01-09 | Hans Haus | Device for duplicating microfilms |
-
1954
- 1954-12-25 GB GB2477954A patent/GB828531A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3289562A (en) * | 1965-05-24 | 1966-12-06 | Reeves Ind Inc | Holder for exposure station of document copier |
EP0006251A1 (en) * | 1978-04-24 | 1980-01-09 | Hans Haus | Device for duplicating microfilms |
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