AT94792B - Curved image window. - Google Patents

Curved image window.

Info

Publication number
AT94792B
AT94792B AT94792DA AT94792B AT 94792 B AT94792 B AT 94792B AT 94792D A AT94792D A AT 94792DA AT 94792 B AT94792 B AT 94792B
Authority
AT
Austria
Prior art keywords
film
legs
image window
window
curved image
Prior art date
Application number
Other languages
German (de)
Original Assignee
Correxwerke Maschinenfabrik Fu
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 Correxwerke Maschinenfabrik Fu filed Critical Correxwerke Maschinenfabrik Fu
Application granted granted Critical
Publication of AT94792B publication Critical patent/AT94792B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Gekrümmtes Bildfenster. 



    Die Filmbänder werden in der Regel bei ihren Rändern geführt, wogegen das Bildfeld unberührt belassen wird, damit die Bildschicht, wie auch die Rückseite des Films dort geschont bleiben. Einzige Ausnahme bildet das Bildfenster der Maschinen, wo der Film zwecks genauer Einstellung in einem allseits geschlossenen flachen Rahmen gespannt wird. Die Federung dieses viereckigen Rahmens verhütet jedoch nicht, dass die Rahmenquerschenkel, die am Bildfeld schleifen, den Film abwetzen, bekratzen und auch sonst beschädigen. Ein weiterer Nachteil dieser Einrahmung ist, dass Knöpfe und sonstige Anschlagstellen, die sich aus der Filmebene, z. B. des Negativs emporheben, keinen freien Durchgang finden. 



  Die Erfindung bietet zwecks Beseitigung dieser Nachteile ein gekrümmtes Bildfenster, bei welchem die Rahmenquerschenkel ohne Schaden der Festführung des Films von dessen Bildfeld abstehen. 



  Die Zeichnung stellt ein Ausführungsbeispiel des Erfindungsgegenstandes auf Abb. 1 im lotrechten Schnitt, auf Abb. 2 in Vorderansicht und auf Abb. 3 im wagrechten Schnitt dar. 



  Das Positiv 1 und Negativ 2 laufen in einer Filmkopiermaschine beisammen von oben nach unten und sind vor dem Bildfenster 5 der Maschinentüre 3 genau zu spannen. Zu diesem Zwecke sind die beiden lotrechten Randleiste 4 der Fenstereinrahmung bei 6 gebogen und die ausgesparten Querschenkel 7 mit Andruckrollen 8 versehen. Leisten 6, Querschenkel 7 und Rollen 8 berühren bloss die Filinränder. 



  Letztere stützen die beiden Filme an den Bogenenden bogenförmig ab, so dass sie im Fenster aneinander und am Bogen überall anliegen. Diese Führung spannt die beiden Filmstreifen genau aus, ohne das Bildfeld zu berühren, wobei zwischen den seitlichen Führungsleisten gegenüber freier Durchschlupfsraum für Knöpfe 9 oder sonstige Anschlagstellen vorhanden ist. 



  Die Filmstreifen werden örtlich in dem Sinne gebogen, dass der Krümmungsradius nach der Lichtquelle zeigt, in welchem Falle eine gleichmässigere Wirkung der Lichtquelle oder eines Objektivs erfolgt. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Curved image window.



    The film tapes are usually guided by their edges, whereas the image field is left untouched, so that the image layer as well as the back of the film remain protected there. The only exception is the machine's picture window, where the film is stretched in a flat frame that is closed on all sides for the purpose of precise setting. However, the suspension of this square frame does not prevent the frame crossbars, which rub against the image field, from scratching, scratching and otherwise damaging the film. Another disadvantage of this frame is that buttons and other stop points that emerge from the film plane, e.g. B. lift up the negative, find no free passage



  In order to overcome these disadvantages, the invention provides a curved picture window in which the frame transverse legs protrude from its picture field without damaging the fixed guide of the film.



  The drawing shows an embodiment of the subject matter of the invention in Fig. 1 in vertical section, in Fig. 2 in front view and in Fig. 3 in horizontal section.



  The positive 1 and negative 2 run together from top to bottom in a film copying machine and must be clamped precisely in front of the image window 5 of the machine door 3. For this purpose, the two vertical edge strips 4 of the window frame are bent at 6 and the recessed transverse legs 7 are provided with pressure rollers 8. The strips 6, the transverse legs 7 and the rollers 8 only touch the edges of the filin.



  The latter support the two films at the ends of the arches so that they rest against each other in the window and on the arch everywhere. This guide stretches the two film strips exactly without touching the image field, with free space for buttons 9 or other stop points being available between the side guide strips.



  The film strips are locally bent in the sense that the radius of curvature points towards the light source, in which case a more even effect of the light source or an objective takes place.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Gekrümmtes Bildfenster für Filmmaschinen, dadurch gekennzeichnet, dass das Bildfenster (5) zwei Randleisten (4) hat, deren Führungsschenkel (6) sich um die Lichtquelle der Maschine bogenförmig biegen und an welche sich an beiden Bogenenden Filmrandandruckrollen von querliegender Achse (8) anschliessen, wobei die Rahmenschenkel (7) im Verhältnis zu der Filmführungsfläche der bogenförmigen Längsschenkel (6) ausgespart sind. EMI1.1 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Curved picture window for film machines, characterized in that the picture window (5) has two edge strips (4), the guide legs (6) of which bend in an arc around the light source of the machine and on which there are film edge pressure rollers of a transverse axis ( 8), the frame legs (7) being recessed in relation to the film guide surface of the arcuate longitudinal legs (6). EMI1.1 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT94792D 1921-12-17 1922-02-08 Curved image window. AT94792B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU94792X 1921-12-17

Publications (1)

Publication Number Publication Date
AT94792B true AT94792B (en) 1923-11-10

Family

ID=10972788

Family Applications (1)

Application Number Title Priority Date Filing Date
AT94792D AT94792B (en) 1921-12-17 1922-02-08 Curved image window.

Country Status (1)

Country Link
AT (1) AT94792B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247853B (en) * 1964-03-25 1967-08-17 Le Objedinjenije Optiko Mechan Arrangement for the picture window film system in a cinema camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247853B (en) * 1964-03-25 1967-08-17 Le Objedinjenije Optiko Mechan Arrangement for the picture window film system in a cinema camera

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