DE327192C - Projection screen - Google Patents
Projection screenInfo
- Publication number
- DE327192C DE327192C DENDAT327192D DE327192DD DE327192C DE 327192 C DE327192 C DE 327192C DE NDAT327192 D DENDAT327192 D DE NDAT327192D DE 327192D D DE327192D D DE 327192DD DE 327192 C DE327192 C DE 327192C
- Authority
- DE
- Germany
- Prior art keywords
- skin
- screen
- projection
- projection screen
- frame
- 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
- 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)
Description
Die Erfindung geht davon aus, anstatt des bisher. gebräuchlichen schweren Projektionsschirmes aus, Leinwand für Filmzwecke einen solchen zu schaffen, der leicht zu befördern und überall aufzubauen ist.The invention assumes that instead of the previous one. common heavy projection screen, screen for film purposes one to create something that is easy to transport and set up anywhere.
Ferner liegt der Gedanke zugrunde, einen Schirm herzustellen, der anstatt der bisher mehr oder weniger welligen Leinwand eine ganz straffe, glatte Fläche hat.Furthermore, the idea is to produce a screen that instead of the previously more or less wavy canvas has a very tight, smooth surface.
ίο Zu diesem Zweck wird ein leichter Holzrahmen α genommen, der die Außenmaße des ■ gewünschten Schirmes hat. In diesen Rahmen wird ein zweiter b gesteckt, der mit einem Stoffüberzug c versehen ist. Dieser Stoffüberzug soll als Unterlage zum Aufkleben von tierischer Haut, Goldschlägerhaut o. dgl., dienen. Der Rahmen wird in seiner vollen Länge und Breite, über c Und b hinweg, hiermit beklebt. Diese Haut wird entweder in einer Lage oder, wenn der Schirm fester sein soll, in zwei und mehr Schichten aufgeklebt. Nach dem Trocknen der Haut wird der mittlere Rahmen b, der den Stoffüberzug hat, aus dem Rahmen α herausgenommen, so daß die Haut in einer großen, ebenen Fläche, wie bei einer Trommel, auf dem Rahmen befestigt bleibt.ίο For this purpose a light wooden frame α is used, which has the external dimensions of the ■ desired screen. A second b , which is provided with a fabric cover c , is inserted into this frame. This fabric cover is intended to serve as a base for sticking animal skin, gold bat skin or the like. The frame is affixed to its full length and width, across c and b . This skin is either glued on in one layer or, if the screen is to be more solid, in two or more layers. After the skin has dried, the middle frame b, which has the fabric cover, is removed from the frame α so that the skin remains attached to the frame in a large, flat surface, like a drum.
Bei weniger großen Schirmen wird wie folgt verfahren: Man fertigt die Haut inThe procedure for smaller umbrellas is as follows: The skin is made in
'30 einer oder mehreren Lagen in der erforderlichen Größe an, trocknet sie und spannt sie, mit Wasser angefeuchtet, ganz straff auf den Rahmen, indem man sie an allen Kanten gut befestigt. Nach dem Trocknen schrumpft die Haut zusammen und ergibt eine ganz glatte Fläche.'30 one or more layers of the required size, dry them and stretch them, moistened with water, quite taut on the frame, by touching it well on all edges attached. After drying, the skin will shrink and make it very smooth Area.
Auf diese Weise ist es möglich, einen sehr leichten, aus einem Gewicht von höchstens -3°g pro Quadratmeter bestehenden, und einen vollkommen ebenen Projektionsschirm herzustellen. Damit er sich später, nicht verändert, wird die Haut mit undurchsichtigem Lack für Projektion von vorn und mit einem durchsichtigen Lack für Projektion von rückwärts bestrichen. An Stelle des durchsichtigen Lackes kann auch ein anderer durchlässiger Anstrich treten, der nicht durchsichtig zu sein, braucht, z.B. ein Anstrich, der die Haut der Mattscheibe einer photographischen Kamera ähnlich macht, z. B. ein milchiger Lack.In this way it is possible to make a very light one, weighing at most -3 ° g per square meter existing, and make a perfectly flat projection screen. So that he won't change later the skin is covered with an opaque varnish for projection from the front and a transparent varnish for projection from the rear coated. Instead of the transparent varnish, another more permeable varnish can be used Paint that does not need to be transparent, e.g. a paint that does not need to be transparent Makes skin similar to the focusing screen of a photographic camera, e.g. B. a milky one Paint.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE327192T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE327192C true DE327192C (en) | 1920-10-08 |
Family
ID=6184697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT327192D Expired DE327192C (en) | Projection screen |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE327192C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10309701A1 (en) * | 2003-03-06 | 2004-09-16 | Edelgard Maier-Jantzen | Rendition of an illustration on a projected area, involves coating partially-transparent film on the surface of a disk, the coating serving as the projection area |
-
0
- DE DENDAT327192D patent/DE327192C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10309701A1 (en) * | 2003-03-06 | 2004-09-16 | Edelgard Maier-Jantzen | Rendition of an illustration on a projected area, involves coating partially-transparent film on the surface of a disk, the coating serving as the projection area |
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