GB310820A - Process and apparatus for the production of half tone transparencies by contact printing - Google Patents
Process and apparatus for the production of half tone transparencies by contact printingInfo
- Publication number
- GB310820A GB310820A GB2890727A GB2890727A GB310820A GB 310820 A GB310820 A GB 310820A GB 2890727 A GB2890727 A GB 2890727A GB 2890727 A GB2890727 A GB 2890727A GB 310820 A GB310820 A GB 310820A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- printing
- lamp
- contact printing
- production
- 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
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F5/00—Screening processes; Screens therefor
- G03F5/14—Screening processes; Screens therefor by contact methods
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
310,820. Dulik, K., and Fulton, O. Oct. 29, 1927. Photo-mechanical printing-surfaces; printing- apparatus. - A half-tone or screen-decomposed positive or negative is produced on a bromide or like sensitive film P by contact printing from a negative or positive N through a screen R, the illumination comprising a central fixed lamp L, and two or more movable sources, for example lamps L2, L3 mounted so as to be rotatable round the lamp L1 as by a motor. The lamps L2' L, are adjustable towards and from the central lamp L, by the screw shaft s. In the case of line screens, one or more sources of light may be moved during exposure across the lines of the screen. Specifications 15845/93, 15626/08 and 29431/09 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2890727A GB310820A (en) | 1927-10-29 | 1927-10-29 | Process and apparatus for the production of half tone transparencies by contact printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2890727A GB310820A (en) | 1927-10-29 | 1927-10-29 | Process and apparatus for the production of half tone transparencies by contact printing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB310820A true GB310820A (en) | 1929-04-29 |
Family
ID=10283097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2890727A Expired GB310820A (en) | 1927-10-29 | 1927-10-29 | Process and apparatus for the production of half tone transparencies by contact printing |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB310820A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2760863A (en) * | 1951-08-20 | 1956-08-28 | Du Pont | Photographic preparation of relief images |
-
1927
- 1927-10-29 GB GB2890727A patent/GB310820A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2760863A (en) * | 1951-08-20 | 1956-08-28 | Du Pont | Photographic preparation of relief images |
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