DE209551C - - Google Patents
Info
- Publication number
- DE209551C DE209551C DENDAT209551D DE209551DA DE209551C DE 209551 C DE209551 C DE 209551C DE NDAT209551 D DENDAT209551 D DE NDAT209551D DE 209551D A DE209551D A DE 209551DA DE 209551 C DE209551 C DE 209551C
- Authority
- DE
- Germany
- Prior art keywords
- frame
- plate
- valve
- air pump
- sealing ring
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
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
- G03B27/20—Maintaining or producing contact pressure between original and light-sensitive material by using a vacuum or fluid pressure
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Reciprocating Pumps (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE209551C true DE209551C (cs) |
Family
ID=471512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT209551D Active DE209551C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE209551C (cs) |
-
0
- DE DENDAT209551D patent/DE209551C/de active Active
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