DD139770A1 - PROCESS FOR FILM TRANSPORT IN PHOTOGRAPHIC CAMERA & S - Google Patents

Description

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? -; £ ^? ^Πα Dresden, on January 17, 1979

Title de r Erf indung

Device for transporting films in photographic cameras.

Field of application of the invention

The invention relates to a device for a photographic camera rait serving for transporting the film in a lease first handle * which is drivingly connected during its transport movement with the built-in winding reel in the camera, and serving for transporting the film in the opposite direction second handle , which is connected to the spool core of a film cartridge which can be inserted into the camera during its transport movement «

Chara kter istics of bek annten; technical ^ solutions

In photographic cameras, it is customary to first transport the film, which has been light-rolled into cartridges, for the purpose of exposing the film cartridge step by step through the exposure station into the winding chamber and then to wind it back out of the winding chamber into the cartridge through a rewinding device «, In case of premature unintended Off'n nen the Kameraruckvvajia. there is a risk that the willing ,?

illuminated pieces of film become unusable due to incidence of light, provided that a sufficiently large camera body is available, the photographer can help in that he additionally inserts an empty cartridge in the take-up, in which the exposed film is rolled. However, there is no camera room for inserting a second cartridge when the camera design is crowded.

Object of the invention

To avoid the unwanted exposure of photographic images, it is an object of the invention to provide a new forward and backward transport of the roll film in photographic cameras.

Explanation of the _i essence of the invention

According to the invention this is achieved in that the second handle is coupled during its transport movement with the closure elevator. By this arrangement is secured without additional locking devices against unwanted opening of the camera rear wall and without the additional insertion of an empty film cartridge in the take-up, that

Photographs fixed on the film are protected against false light in the only film patrix «

According to a conceivable camera version, the cartridge containing the unexposed film is inserted into the storage chamber of the camera. "After the end of the cartridge protruding from the cartridge has been connected to the take-up reel stored in the take-up reel, the camera back is

wall closed. Then, by rotating the take-up spool, the unexposed film is wound there, leaving the other end of the film bonded to the spool core of the cartridge. The step-by-step exposure of the film is now carried out by moving the spool core of the cartridge by means of a conventional Filmtranspörtvorrichtung the film is gradually transported from the Aufwickelkaminer on the exposure station (image stage) in the cartridge. For example, unintentional opening of the rear of the camera merely results in exposure of the still unexposed portion of the film, while the photographic images already present on the film are protected against light in the single. Cartridge lie,

Claims (1)

BrfindunssansDruch Apparatus for a photographic camera having a first handle for transporting the film in one direction, which is operatively connected during its transport movement to the takeup spool built in the camera, and a second handle for transporting the film in the opposite direction its transport movement with the spool core of a film cartridge alloyed into the camera is drivingly connected, characterized in that · the second handle is coupled during its transport movement with the shutter lift «".