DE378567C - Projection screen - Google Patents

Projection screen

Info

Publication number
DE378567C
DE378567C DES58366D DES0058366D DE378567C DE 378567 C DE378567 C DE 378567C DE S58366 D DES58366 D DE S58366D DE S0058366 D DES0058366 D DE S0058366D DE 378567 C DE378567 C DE 378567C
Authority
DE
Germany
Prior art keywords
parts
starch
solution
projection screen
water
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
Application number
DES58366D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DES58366D priority Critical patent/DE378567C/en
Application granted granted Critical
Publication of DE378567C publication Critical patent/DE378567C/en
Expired legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Description

Projektionsschirm. Die Erfindung betrifft ein Verfahren zum Herstellen von, Projektionsschirmen für Auf-und Durch-licht.Projection screen. The invention relates to a method of manufacture of, projection screens for incident and transmitted light.

Zu diesem. Zwecke wird ein biegsamer Stoff auf die richtige Größe zugeschnitten; auf einen Rahmen aufgezogen und an ihm gut befestigt. Ein Baumwollgewebe, das Satinappretur hat und weiß, hei'lreh#braun oder hellblau ist, hat sich besonders gut :bewährt. Die vorzugsweise benutzte Farbe für die Mehrzahl der Schirme ist weiß.To this. Purposes being a pliable fabric to the right size tailored; mounted on a frame and attached to it well. A cotton fabric, that has a satin finish and is white, hot brown or light blue, has turned out to be special good: proven. The preferred color used for the majority of the screens is white.

Da einderartiger Schirm möglichst feuersicher sein soll, wird er mit einer Lösung getränkt, die aus 2 Teilen Ammoniumchlorid, 2 Teilen Ammoniumphosphat, 3 Teilen Ammoniumsülph:at und 4o Teilen Wasser besteht.Since this type of umbrella should be as fire-proof as possible, it is included impregnated with a solution consisting of 2 parts of ammonium chloride, 2 parts of ammonium phosphate, 3 parts ammonium sulphate and 40 parts water.

Der Schirm verbleibt in der Lösung ungefähr zwei Monate. Er wird nachher aufrecht gestellt, und man läßt ihn trocknen. Nach dem Trocknen wird das Gewebe mit einer schwachen Stärkelösung behandelt, die aus % kg Stärke auf ungefähr 121 Wasser besteht und aufgekocht wird. Hierin wird der Schirm so Tange :belassen, bis eine vollständigeDurchtränkung stattgefunden. hat und alle Maschen und Poren mit der Stärkemasse .gefüllt sind. Man nimmt dann den Schirm heraus, läßt die Lösung ablaufen und den Schirm trocknen.The screen remains in the solution for about two months. He will afterwards placed upright and left to dry. After drying, the fabric will Treated with a weak starch solution, which from% kg starch to about 121 Water and is boiled. Here the screen is so Tange: leave it until complete soaking has taken place. has and all meshes and pores with the starch mass. are filled. You then take out the screen and leave the solution run off and dry the umbrella.

In Einzelfällen kann es zweckmäßig sein, den Schirm nach dem Tränken mit Stärke und Trocknen zu glätten. Dadurch wird die gleichförmige Verteilung der Stärke auf .der ganzen Oberfläche und in !den Poren des Schirmes begünstigt. Dabei darf das Bügeleisen nicht zu heiß sein, da sonst die Farbe des Schirmes bleicht.In individual cases it can be useful to remove the umbrella after watering smooth with starch and drying. This will ensure the uniform distribution of the Strength all over the surface and in the pores of the screen. Included the iron must not be too hot, otherwise the color of the shade will be bleached.

Claims (1)

PATENT-ANSPRUcH: Verfahren zum Herstellen von. Projektionsschirmen, dadurch gekennzeichnet, daß ein in an sich bekannter Weise auf einen Rahmen gespanntes Gewebe in eine Lösung, - bestehend aus 2 Teilen Ammoniumchlorid, 2 Teilen Ammoniumphosphat, 3 Teilen Ammonnumsülphat und 4o Teilen Wasser, gebracht wird und! darin etwa zwei Monate verbleibt, worauf er getrocknet, und auf kürzere Zeit in eine Stärkelösung gebracht wird, die auf etwa 1:21 Wasser % kg Stärke enthält und aufgekocht ist.PATENT CLAIM: Process for producing. Projection screens, characterized in that a stretched in a known manner on a frame Tissue in a solution, - consisting of 2 parts of ammonium chloride, 2 parts of ammonium phosphate, 3 parts ammonium sulphate and 40 parts water, is brought and! in it about two It remains for months, after which it is dried, and for a shorter period of time in a starch solution is brought, which contains about 1:21 water% kg starch and is boiled.
DES58366D 1921-12-15 1921-12-15 Projection screen Expired DE378567C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES58366D DE378567C (en) 1921-12-15 1921-12-15 Projection screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES58366D DE378567C (en) 1921-12-15 1921-12-15 Projection screen

Publications (1)

Publication Number Publication Date
DE378567C true DE378567C (en) 1923-07-19

Family

ID=7492491

Family Applications (1)

Application Number Title Priority Date Filing Date
DES58366D Expired DE378567C (en) 1921-12-15 1921-12-15 Projection screen

Country Status (1)

Country Link
DE (1) DE378567C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29708874U1 (en) * 1996-07-26 1997-11-27 Langenfurth, Heinz, 46147 Oberhausen Protection element for log houses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29708874U1 (en) * 1996-07-26 1997-11-27 Langenfurth, Heinz, 46147 Oberhausen Protection element for log houses

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