Patent ID: 8066678

Claim:
In combination, a housing; a needle extending from said housing; a cap concentrically disposed over said needle and having a bore for passage of said needle therethrough, said cap being movable relative to said needle from a first position with said needle extending through said bore to a second position with an end of said needle disposed therein in spaced relation to said bore and in sealed relation; and a non-resilient tubular sheath of plastic film concentrically disposed on and about said needle in a collapsed state and secured to and between said housing and said cap, said sheath being longitudinally extendable from said collapsed state to an extended state in response to movement of said cap from said first position to said second position thereof and being in a stretched condition with said end of said needle withdrawn from said bore to maintain said cap in sealed relation to said needle and being characterized in having a low percentage of elongation to break and a high tensile strength.