DE381074C - screen - Google Patents

screen

Info

Publication number
DE381074C
DE381074C DEB104670D DEB0104670D DE381074C DE 381074 C DE381074 C DE 381074C DE B104670 D DEB104670 D DE B104670D DE B0104670 D DEB0104670 D DE B0104670D DE 381074 C DE381074 C DE 381074C
Authority
DE
Germany
Prior art keywords
weight
parts
metal layer
skin
screen
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
DEB104670D
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.)
HUGO VON BOECKH DR
LUDWIG VON TOLNAY
Original Assignee
HUGO VON BOECKH DR
LUDWIG VON TOLNAY
Publication date
Priority to DEB104670D priority Critical patent/DE381074C/en
Application granted granted Critical
Publication of DE381074C publication Critical patent/DE381074C/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

Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.

Claims (2)

Patent-Ansprüche:Patent Claims: 1. Bildschirm mit einer zwischen zwei Stoffen befindlichen spiegelnden· Metallschicht, dadurch gekennzeichnet, daß die Metallschicht allseitig mit einer Kolloidihaut überzogen ist, die in bekannter Weise rastriert older mattiert sein kann.1.Screen with a reflective metal layer between two materials, characterized in that the metal layer is covered on all sides with a colloidal skin, which in a known manner rastriert older can be matted. 2. Verfahren zum Erzeugen der Kolloidhaut mach Anspruch 1, dadurch gekennzeichnet, daß Zelluloid in einem Gemisch von 3 GT Dimethylketon und 2 GT Amylazetat aufgelöst und dieser Lösung so viel Eisessig zugefügt wird, bis die Trübung verschwindet, worauf die Lösung von den erfolgten Ausscheidungen abgeklärt und die angegossene Schicht unter einer Decke getrocknet wird.2. Method for creating the colloid skin Mach claim 1, characterized in that celluloid in a mixture dissolved by 3 parts by weight of dimethyl ketone and 2 parts by weight of amyl acetate and so much glacial acetic acid is added to this solution until the cloudiness disappears, whereupon the solution cleared of the precipitations and the cast-on layer under a blanket is dried.
DEB104670D screen Expired DE381074C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB104670D DE381074C (en) screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB104670D DE381074C (en) screen

Publications (1)

Publication Number Publication Date
DE381074C true DE381074C (en) 1923-09-15

Family

ID=6991111

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB104670D Expired DE381074C (en) screen

Country Status (1)

Country Link
DE (1) DE381074C (en)

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