Apparatus and methods using mandrel to roll film in camera chamb

Details Apparatus and methods using mandrel to roll film in camera chamb Apparatus and methods using mandrel to roll film in camera chamb

1997-12-23

1999-04-20

Blankenship, Howard B.

Photography

Disposable or recyclable camera

396538, 2425322, G03B 1702

Patent

active

058951261

ABSTRACT:
A method and apparatus for assembling a photographic camera having a cartridge chamber and a film chamber. In the method, a film cartridge is positioned in the cartridge chamber. The film cartridge includes a spool and a filmstrip. A leading portion of the filmstrip is curled about a curling axis internal to the supply chamber. During the curling, deflection of the leading portion in directions radial to the axis beyond a predetermined preliminary radius is limited. A main portion of the filmstrip is wound around the leading portion to form a film roll. The film roll has an outermost turn defining a first film roll radius larger than the preliminary radius. Following the winding, the film roll is allowed to expand to a second film roll radius larger than the first film roll radius. Outward telescoping of the film roll is limited.

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