BE832380A - Dispositif pour enrouler et derouler un ecran de projection - Google Patents
Dispositif pour enrouler et derouler un ecran de projectionInfo
- Publication number
- BE832380A BE832380A BE159156A BE159156A BE832380A BE 832380 A BE832380 A BE 832380A BE 159156 A BE159156 A BE 159156A BE 159156 A BE159156 A BE 159156A BE 832380 A BE832380 A BE 832380A
- Authority
- BE
- Belgium
- Prior art keywords
- unrolling
- rolling
- projection screen
- projection
- screen
- Prior art date
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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE7501295 | 1975-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE832380A true BE832380A (fr) | 1975-12-01 |
Family
ID=6649712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE159156A BE832380A (fr) | 1975-01-17 | 1975-08-13 | Dispositif pour enrouler et derouler un ecran de projection |
Country Status (10)
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7707290U1 (de) * | 1977-03-09 | 1977-06-30 | Mechanische Weberei Gmbh, 4792 Bad Lippspringe | Lichtbildprojektionswand mit lautsprechern |
-
1975
- 1975-07-25 AT AT579975A patent/AT335537B/de not_active IP Right Cessation
- 1975-07-28 CH CH982975A patent/CH595649A5/xx not_active IP Right Cessation
- 1975-07-30 DD DD187572A patent/DD121196A5/xx unknown
- 1975-08-01 LU LU73134A patent/LU73134A1/xx unknown
- 1975-08-01 SE SE7508721A patent/SE7508721L/xx unknown
- 1975-08-01 DK DK350075A patent/DK350075A/da unknown
- 1975-08-07 FR FR7524611A patent/FR2298122A1/fr active Granted
- 1975-08-13 BE BE159156A patent/BE832380A/xx unknown
- 1975-08-18 GB GB3426775A patent/GB1467569A/en not_active Expired
-
1976
- 1976-01-05 NL NL7600054A patent/NL7600054A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2298122A1 (fr) | 1976-08-13 |
| LU73134A1 (US20030199744A1-20031023-C00003.png) | 1976-03-02 |
| NL7600054A (nl) | 1976-07-20 |
| ATA579975A (de) | 1976-07-15 |
| DK350075A (da) | 1976-07-18 |
| SE7508721L (sv) | 1976-07-19 |
| GB1467569A (en) | 1977-03-16 |
| CH595649A5 (US20030199744A1-20031023-C00003.png) | 1978-02-15 |
| FR2298122B1 (US20030199744A1-20031023-C00003.png) | 1979-05-11 |
| DD121196A5 (US20030199744A1-20031023-C00003.png) | 1976-07-12 |
| AT335537B (de) | 1977-03-10 |
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