DE271520C - - Google Patents
Info
- Publication number
- DE271520C DE271520C DENDAT271520D DE271520DA DE271520C DE 271520 C DE271520 C DE 271520C DE NDAT271520 D DENDAT271520 D DE NDAT271520D DE 271520D A DE271520D A DE 271520DA DE 271520 C DE271520 C DE 271520C
- Authority
- DE
- Germany
- Prior art keywords
- projection screen
- projection
- metal
- cardboard
- paper
- 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
- 241000031711 Cytophagaceae Species 0.000 claims 1
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000011521 glass Substances 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 239000010974 bronze Substances 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- -1 canvas Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002310 reflectometry Methods 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE271520C true DE271520C (enrdf_load_stackoverflow) | 1900-01-01 |
Family
ID=528163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT271520D Expired DE271520C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE271520C (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5811488A (en) * | 1996-05-31 | 1998-09-22 | Kuraray Co., Ltd. | Polyvinyl alcohol powder |
-
0
- DE DENDAT271520D patent/DE271520C/de not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5811488A (en) * | 1996-05-31 | 1998-09-22 | Kuraray Co., Ltd. | Polyvinyl alcohol powder |
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