Key-ring from a photographic roll film casing

Abstract

This present invention relates to a key-ring which makes use of a photographic roll film casing, where said photographic film has already been developed, thereby avoiding the creation of waste and reducing environmental pollution. Said photographic film casing, without the corresponding photographic material therein, will be used together with the structure proposed by this present invention as a means for holding keys, commonly referred to as key-rings. Our invention incorporates, on the periphery of the insert or cylindrical rod, outer lugs which will give a similar configuration to an outer threading, and which will allow said insert to become firmly fitted and locked to the corresponding threading central hole of the photographic film casing, thereby avoiding the use of any glue or adhesive. The rod end not inserted to the casing will have three preferred forms of embodiment, such as a ring or a loop which closes on itself or on a small hole on which the outer ring is coupled. It will be also possible to provide said rod with two diametrically opposed longitudinal grooves or one longitudinal passing groove.

1 . Key-ring from a photographic film casing, characterized in that it is comprises a cylindrical rod which outer surface comprises retention lugs, and wherein the key holding element projects from one end thereof.  
     
     
         2 . Key-ring from a photographic film casing according to  claim 1 , characterized in that the key holding element is a ring.  
     
     
         3 . Key-ring from a photographic film casing according to  claim 1 , characterized in that the key holding element is a loop which closes on the rod head.  
     
     
         4 . Key-ring from a photographic film casing according to  claim 1 , characterized in that the key holding element comprises a small hole on the rod end.  
     
     
         5 . Key-ring from a photographic film casing according to  claim 1 , characterized in that the said rod comprises two diametrically opposed peripheral longitudinal grooves.  
     
     
         6 . Key-ring from a photographic film casing according to  claim 1 , characterized in that the rod comprises a longitudinal groove passing from side to side oo the periphery thereof.  
     
     
         7 . Key-ring from a photographic film casing according to  claim 1 , characterized in that the said key-ring is made of plastic material.  
     
     
         8 . Key-ring from a photographic film casing according to  claim 1 , characterized in that said cylindrical rod extends along the full length of the photographic film casing.