Metallic collapsible tubes having

Claim 1

A COLLAPSIBLE TUBE COMPRISING A METAL BODY WITH A SHOULDER IN ONE END THEREOF, A METAL NECK EXTENDING FROM SAID SHOULDER AND HAVING A GENERALLY CYLINDRICAL PORTION PROVIDED WITH AN OUTER END SURFACE IN A PLANE PERPENDICULAR TO THE AXIS OF THE METAL NECK, AND A TUBULAR PLASTIC NECK HAVING INHERENT RESILIENCY AND AN INTERNAL CYLINDRICAL PORTION CORRESPONDING APPROXIMATELY IN DIAMETER TO THE CYLINDRICAL PORTION OF THE METAL NECK, SAID PLASTIC NECK BEING LONGITUDINALLY SLIDABLY FITTED ON SAID METAL NECK, THE EXTERIOR OF SAID METAL NECK AND THE INTERIOR OF SAID PLASTIC NECK HAVING SMOOTH APPROXIMATELY CYLINDRICAL SURFACES IN SNUG FRICTONAL CONTACT WITH EACH OTHER, SAID EXTERIOR OF THE METAL NECK AND THE INTERIOR OF THE PLASTIC NECK ALSO HAVING MATING LONGITUDINAL GROOVES AND RIBS SPACED CIRCUMFERENTIALLY OF THE NECKS AND LONGITUDINALLY OF THE NECKS FROM SAID SMOOTH PORTIONS TO PREVENT RELATIVE ROTATION OF THE PLASTIC NECK AND THE METAL NECK, THE EXTERNAL SURFACE OF THE METAL NECK AND THE INTERNAL SURFACE OF THE PLASTIC NECK BETWEEN SAID SHOULDER AND SAID RIBS AND GROOVES HAVING INTERLOCKING PORTIONS FOR HOLDING THE PLASTIC NECK FIRMLY AGAINST OUTWARD MOVEMENT ON THE METAL NECK.