DE850108C - Film cassette for holding exposed films - Google Patents
Film cassette for holding exposed filmsInfo
- Publication number
- DE850108C DE850108C DEM4249D DEM0004249D DE850108C DE 850108 C DE850108 C DE 850108C DE M4249 D DEM4249 D DE M4249D DE M0004249 D DEM0004249 D DE M0004249D DE 850108 C DE850108 C DE 850108C
- Authority
- DE
- Germany
- Prior art keywords
- film
- cassette
- film cassette
- exposed films
- roller
- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/28—Locating light-sensitive material within camera
- G03B17/30—Locating spools or other rotatable holders of coiled film
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radiography Using Non-Light Waves (AREA)
Description
Bei Reihenäufn?Lhmen, wie sie z. B. in der Röntgentechnik bei der Photographie von Leuchtschirmbildern vorkommen, wird der Film von einer Vorratsrolle schrittweise über die Belichtung.seinrichtun:g in eine Kassette, die die belichteten Filme aufnimmt, geführt.In the case of row entrances, as they are z. B. in X-ray technology at the If photography of fluorescent images occurs, the film is taken from a supply roll step by step over the exposure device: g into a cassette, which the exposed Records films, guided.
Es ist bekannt, in der Mitte der Kassette zum Aufwickeln des Films eine drehbare Walze anzuordnen, auf der der Filmanfang durch Einklemmen od. dgl. befestigt wird. Diese Art der Befestigung ist unbefriedigend, weil sie von außen schwer zu betätigen ist. Ein weiterer Nachteil tritt auf, wenn die Aufnahmeserie vor Belichtung des ganzen Films unterbrochen werden muß, um den bereits belichteten Teil vorweg zu entwickeln. In diesem Fall muß nach Anbringung einer neuen Kassette der Filmanfang wiederum an der Walze befestigt werden. Dabei geht jedesmal eine beträchtliche Filmlänge verloren.It is known to be in the center of the cassette for winding the film to arrange a rotatable roller on which the beginning of the film by pinching or the like. is attached. This type of fastening is unsatisfactory because it is from the outside difficult to operate. Another disadvantage occurs when the series of exposures must be interrupted before exposure of the entire film to the already exposed To develop part in advance. In this case a new cassette has to be installed the beginning of the film can in turn be attached to the roller. Every time one goes lost considerable film length.
Ferner ist eine Kassette für Kleinapparate bekannt, bei der der Film durch evolventenförmige Federn zur Kassettenmitte gebogen wird und sich dann selbsttätig in der Kassette aufrollt; -ohne-daß eine Walze zum Aufwickeln benutzt wird. Diese bekannte Kassette eignet sich nur für geringe Filmlängen, da die Reibung der aneinander vorbeigleitenden Filmstreifen nach kurzer Zeit -zur Stäuurng des Films führt.Also known is a cassette for small devices in which the film is bent by involute springs to the center of the cassette and then automatically rolls up in the cassette; - without - that a roller is used for winding. These known cassette is only suitable for short film lengths, because of the friction between them After a short time, the film strips sliding past lead to the jamming of the film.
Alle genannten Nachteile werden bei der Filmkassette gemäß der Erfindung dadurch vermieden, daß der Film durch Leitfedern gegen eine aufspulende, rotierende Walze geführt wird, die mit einem Gummibelag versehen ist.All of the disadvantages mentioned are eliminated with the film cassette according to the invention thereby avoided that the film by means of guide springs against a winding, rotating Roller is guided, which is provided with a rubber coating.
Ein Ausführungsbeispiel der Erfindung ist in der Abbildung dargestellt. Durch die Öffnung 2 der Kassette r wird der Film 3 eingeführt und mittels der Federn 4 an die Walze 5 herangeführt. Die Walze 5 ist mit einem Gummibelag versehen und fängt infolge der Adhäsionskraft den Film ein, so daß dieser glatt aufgespult wird. Beim Einfädeln des Films ist es zweckmäßig, die Rotationsgeschwindigkeit der Walze etwas größer zu machen als die Geschwindigkeit, mit der der Film eingeführt wird.An embodiment of the invention is shown in the figure. The film 3 is inserted through the opening 2 of the cassette r and by means of the springs 4 brought up to the roller 5. The roller 5 is provided with a rubber coating and catches the film as a result of the adhesive force, so that it is wound up smoothly. When threading the film, it is useful to adjust the speed of rotation of the roller to make something greater than the speed at which the film is being introduced.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM4249D DE850108C (en) | 1944-04-28 | 1944-04-28 | Film cassette for holding exposed films |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM4249D DE850108C (en) | 1944-04-28 | 1944-04-28 | Film cassette for holding exposed films |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE850108C true DE850108C (en) | 1952-09-22 |
Family
ID=7292584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEM4249D Expired DE850108C (en) | 1944-04-28 | 1944-04-28 | Film cassette for holding exposed films |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE850108C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3521829A (en) * | 1969-05-15 | 1970-07-28 | Eastman Kodak Co | Self-threading take-up reel |
| DE2617233A1 (en) * | 1976-04-13 | 1977-11-03 | Gretag Ag | CASSETTE FOR RECEIVING PHOTOGRAPHIC COPY MATERIAL |
-
1944
- 1944-04-28 DE DEM4249D patent/DE850108C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3521829A (en) * | 1969-05-15 | 1970-07-28 | Eastman Kodak Co | Self-threading take-up reel |
| DE2617233A1 (en) * | 1976-04-13 | 1977-11-03 | Gretag Ag | CASSETTE FOR RECEIVING PHOTOGRAPHIC COPY MATERIAL |
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