Abstract: The invention relates to an externally hooked storage spool for rotary winding on and unwinding elastic materials comprising a cylindrical core and two flanges, the core having wing-like catching members for catching the end of the elastic material while the spool rotates and one holding hook and one pin to prevent unhooking in an opening between the wing like catching members and the end of the strip is provided with a hammer-shaped first cut in which are produced at least one holding hole and one hole to prevent unhooking.

Abstract: The invention relates to a cassette for roll films, in particular for miniature films, consisting of a cylindrical container as the film storage chamber, a film exit slot formed thereon and a film spool whereby at least one edge of the cylindrical container is turned inwards to increase the impermeability to light, the slot comprises strips bent downwards at its lateral ends to define the width of the slot and at least one closure element is formed onto the cassette container overlapping the deformed container edge and laterally closing the cassette slot.

Abstract: The invention relates to a cassette for roll film with a spool-less supply chamber for containing the film and a protective paper strip, a take-up chamber with a spool for taking-up the film and the paper strip, a bridge arranged between the two chambers to form a rear contact surface and a guide for the film and means to retain the end of the film in a desired position.

Abstract: The invention relates to a spool for winding elastic material in the form of tape, in particular film, with external hooks comprising a cylindrical spool core with an opening on and in which the hooks are formed and preferably also two flange discs and the film having perforations for its attachment to the hooks in the spool.

Abstract: The present invention relates to a photographic film cassette comprising a feed compartment and a take-up compartment, which communicate through a slot like film passageway with an exposure station inbetween. The film side wall of the film passageway to the take up compartment is provided with a depression which continuously tapers in its width and which runs out to the original surface in its depth.A side wall of the depression is undercut to engage with a widening end of the film to prevent the film from being completely drawn into the take-up compartment. A projection is provided on the paper chafing patch side wall of the exit of the film passageway to the take-up compartment to help putting the film in the depression.