DE293976C - - Google Patents
Info
- Publication number
- DE293976C DE293976C DENDAT293976D DE293976DA DE293976C DE 293976 C DE293976 C DE 293976C DE NDAT293976 D DENDAT293976 D DE NDAT293976D DE 293976D A DE293976D A DE 293976DA DE 293976 C DE293976 C DE 293976C
- Authority
- DE
- Germany
- Prior art keywords
- glass
- glass plates
- projection
- backing
- plates
- 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
- 239000011521 glass Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229920000084 Gum arabic Polymers 0.000 description 1
- 241000978776 Senegalia senegal Species 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002023 wood 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/62—Translucent screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Publications (1)
Publication Number | Publication Date |
---|---|
DE293976C true DE293976C (enrdf_load_html_response) | 1900-01-01 |
Family
ID=548589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT293976D Expired DE293976C (enrdf_load_html_response) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE293976C (enrdf_load_html_response) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1117377B (de) * | 1955-11-10 | 1961-11-16 | Agfa Ag | Lichtdurchlaessiger, im uebrigen diffus reflektierender Schirm fuer fotografische Geraete |
-
0
- DE DENDAT293976D patent/DE293976C/de not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1117377B (de) * | 1955-11-10 | 1961-11-16 | Agfa Ag | Lichtdurchlaessiger, im uebrigen diffus reflektierender Schirm fuer fotografische Geraete |
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