Dip tube

Claim 1

A DIP TUBE FOR CONTAINERS COMPRISING: AN ELONGATE METAL TUBULAR REINFORCING MEANS HAVING FIRST AND SECOND ENDS, AN OUTWARDLY EXTENDING MOUNTING FLANGE ATTACHED TO THE REINFORCING MEANS AT THE SECOND END THEREOF, AN INNER PLASTIC SHEATH READILY SLIDABLY MOUNTED ON SAID REINFORCING MEANS AND EXTENDING FROM SAID MOUNTING FLANGE THROUGH SAID REINFORCING MEANS AND EXTENDING BEYOND THE FIRST END THEREOF, SAID INNER SHEATH INCLUDING AN INNER FLANGE CONCENTRIC WITH AND ABUTTING SAID MOUNTING FLANGE, AN OUTER PLASTIC SHEATH READILY SLIDABLY MOUNTED ON SAID REINFORCING MEANS AND EXTENDING FROM THE MOUNTING FLANGE AROUND SAID REINFORCING MEANS AND EXTENDING BEYOND THE FIRST END THEREOF, SAID OUTER SHEATH INCLUDING AN OUTER FLANGE CONCENTRIC WITH AND ABUTTING SAID MOUNTING FLANGE, A MIDDLE PLASTIC FILLER MEMBER HAVING A CROSS SECTION SUBSTANTIALLY THE SAME AS THE CROSS SECTION OF THE REINFORCING MEANS MOUNTED BETWEEN THE EXTENSIONS OF THE INNER AND OUTER SHEATHS AND FUSED THROUGHOUT ITS LENGTH THERETO, SAID MIDDLE MEMBER BEING SPACED FROM THE FIRST END OF SAID REINFORCING MEANS, THEREBY PROVIDING A GAP FOR THERMAL EXPANSION OF SAID REINFORCING MEANS AND THERMAL CONTRACTION OF THE SHEATHS AND MIDDLE MEMBER, SAID SHEATHS AND MIDDLE MEMBER BEING OF THE SAME PLASTIC MATERIAL, AND SAID REINFORCING MEANS HAVING A DIFFERENT RATE OF THERMAL EXPANSION THAN SAID SHEATHS AND MIDDLE FILLER MEMBER.