DE597551C - Process for the production of projection screens - Google Patents

Process for the production of projection screens

Info

Publication number
DE597551C
DE597551C DEP65318D DEP0065318D DE597551C DE 597551 C DE597551 C DE 597551C DE P65318 D DEP65318 D DE P65318D DE P0065318 D DEP0065318 D DE P0065318D DE 597551 C DE597551 C DE 597551C
Authority
DE
Germany
Prior art keywords
production
fabric
projection screens
mass
rolled
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
DEP65318D
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
Publication date
Priority to DEP65318D priority Critical patent/DE597551C/en
Application granted granted Critical
Publication of DE597551C publication Critical patent/DE597551C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/54Accessories
    • G03B21/56Projection screens
    • G03B21/60Projection screens characterised by the nature of the surface

Landscapes

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

Description

Es ist bereits bekannt, die Struktur dadurch herzustellen, daß man auf eine untere Stoffbahn eine knetbare Masse aufbringt und in dieser dann durch Walzen die Struktur erzeugt.It is already known to produce the structure by clicking on a lower Fabric web applies a kneadable mass and then the structure in this by rolling generated.

Beim Walzen der knetbaren Masse, etwa ίο Wachslack, haben sich in erster Linie aus dem Haftvermögen zwischen Masse und Walzenoberfläche Schwierigkeiten ergeben, die der Erzielung einer richtigen Strukturkörperform hinderlich sind. Auch die weitere Er-1.5 haltung der Strukturkörperform läßt mangels eines Schutz und Halt bietenden Körpers zu wünschen übrig.When rolling the kneadable mass, such as ίο wax varnish, have primarily come off the adhesion between the mass and the roll surface difficulties that obstruct the achievement of a correct structural body shape. Also the other Er-1.5 Maintaining the structural body shape allows in the absence of a body that offers protection and support to be desired.

Diese Schwierigkeiten werden erfindungsgemäßi dadurch beseitigt, daß in an sich bekannter Weise eine zweite Stoffbahn als Oberschicht mit aufgewalzt wird.These difficulties are addressed according to the invention eliminated by the fact that a second web of material is rolled on as a top layer in a manner known per se.

Diese Oberschicht schmiegt sich der Strukturkörperform aufs engste an, schützt und unterstützt sie bei der späteren Benutzung as des Schirms und deckt während des Walzens die Walze gegen die knetbare und klebrige Masse ab.This top layer hugs the structural shape of the body very closely, protects and supports you in the later use of the umbrella and covers while rolling the roller against the kneadable and sticky mass.

Auf der Zeichnung ist die Erfindung beispielsweise veranschaulicht; es stellen dar:
Abb. ι eine schematische Ansicht eines Stücks des fertigen Schirms, etwa sechsfach vergrößert,
The invention is illustrated by way of example in the drawing; it represent:
Fig. Ι a schematic view of a piece of the finished screen, enlarged approximately six times,

Abb. 2 einen Teilschnitt durch den Rohschirm nach dem Zusammenbringen der drei Schichten,Fig. 2 shows a partial section through the raw screen after the three have been brought together Layers,

2 die aus knetbarer Masse, z. B. Wachslack, bestehende Zwischenschicht und 1 die als Deckschicht dienende Stoffbahn.2 made of kneadable mass, z. B. wax varnish, existing intermediate layer and 1 as Covering layer of fabric.

Nachdem auf die untere Stoffbahn 3 die knetbare Masse 2 und auf diese die obere Stoffbahn 1 aufgebracht ist (Abb. 2), wird die letztere bei dem üblichen Erzeugen der Strukturf orm mittels Walzen in die knetbare Masse 2 (Abb. ι und 3) eingewalzt; bei der Herstellung des Schirms dient die Stoffbahn 1 zur Erzielung einer gleichmäßigen Oberflächenstruktur und in mechanischer Hinsicht erhöht sie die Haltbarkeit des Schirms, ohne daß der Überzug zu erneuern ist. Der Schirm ist waschbar und gegen Temperatureinflüsse unempfindlich, auch nicht feuergefährlich. Die Zusammensetzung ergibt hohe Elastizitat, so daß sich der Schirm trotz der Struktur zum Transport zusammenrollen läßt.After on the lower panel 3 the kneadable mass 2 and on this the upper web of fabric 1 is applied (Fig. 2), the the latter in the usual production of the structural shape by means of rollers into the kneadable mass 2 (Fig. Ι and 3) rolled in; In the manufacture of the screen, the fabric 1 is used for Achievement of a uniform surface structure and increased in mechanical terms the durability of the screen without having to renew the cover. The screen is washable and insensitive to temperature influences, also not inflammable. The composition results in high elasticity, so that the umbrella can be rolled up for transport despite the structure.

Claims (1)

Patentanspruch:Claim: Verfahren zur Herstellung von Bildwerferschirmen mit Prägestruktur der Oberfläche, bei dem die Struktur durch Walzen einer auf eine untere Stoffbahn aufgebrachten, knetbaren Masse erzeugt wird, dadurch gekennzeichnet, daßi zur Erzielung einer richtigen und haltbaren Strukturkörperform in an sich bekannter Weise eine zweite Stoffbahn als Oberschicht mit aufgewalzt wird.Process for the production of projector screens with an embossed structure of the Surface in which the structure is formed by rolling one onto a lower sheet of fabric applied, kneadable mass is produced, characterized in that i for A second web of fabric as a top layer is used to achieve a correct and durable structural body shape in a manner known per se is rolled on. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DEP65318D Process for the production of projection screens Expired DE597551C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP65318D DE597551C (en) Process for the production of projection screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP65318D DE597551C (en) Process for the production of projection screens

Publications (1)

Publication Number Publication Date
DE597551C true DE597551C (en) 1934-05-26

Family

ID=7390577

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP65318D Expired DE597551C (en) Process for the production of projection screens

Country Status (1)

Country Link
DE (1) DE597551C (en)

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