Patent ID: 6118942
Filing Date: 2000-09-12
Classification: G03B

Abstract:
A photographic film packaging unit provided with a lens and which comprises at least one device for making an exposure, and which comprises a light-tight film housing on which the lens is mounted, a film cartridge which is enclosed in the light-tight film housing and which contains an empty spool having a core, and a rolled-up film, one end of which is attached to the core of the empty spool, and wherein the film packaging unit contains a motive spring which is tensioned before being put into operation and which acts on the film cartridge so that after each exposure the motive spring is released to such an extent that the film is wound into the film cartridge by one frame, and wherein the film cartridge is situated in a cartridge chamber, a cylindrical spring housing in which the motive spring is disposed is provided above the cartridge chamber, the spring housing comprises an externally encircling toothed portion connected to the spool of the film cartridge and is mounted so that the toothed portion rotates about a pin disposed in the center of the film cartridge to which pin the inner end of the motive spring is fixed.