Blood-sampling tube

DETAILED DESCRIPTION I claim 1.
A blood sampling tube assembly which comprises: a sampling tube having an open end and a wall surrounding a mouth of said tube and said open end; and a cap closing said mouth of said tube and formed with inner and outer walls snugly receiving said wall of said tube between them and having an end wall interconnecting said inner and outer walls against which a rim of said sampling tube can be pressed, said cap being formed with an outwardly open compartment within said inner wall closed by a laminate having a heat sealable layer bonded to said cap at said end wall and retaining within said compartment a self-sealing plug penetrable by a needle and sealing upon withdrawal of a needle therefrom.
2.
The assembly defined in claim 1 wherein said cap is formed with a transverse partition at an intermediate location over the height of said inner wall, said plug being seated against said partition.
3.
The assembly defined in claim 2, further comprising a sleeve extending axially from said partition and spaced from said inner wall while defining said compartment within said sleeve, said plug being received in said sleeve.
4.
The assembly defined in claim 3 wherein said sleeve is provided with formations engaging in said membrane for retaining said plug in place.
5.
The assembly defined in claim 2 wherein said partition extends fully across the cross section within said inner wall.
6.
The assembly defined in claim 2 wherein said partition is in the form of a rim having a central opening aligned with a portion of said plug to be pierced by a needle.
7.
The assembly defined in claim 6 wherein said plug substantially fills said compartment and said compartment is bounded by said laminate, said inner wall and said partition; said inner wall being formed between said partition and said laminate with formations engaging in said sealing plug.
8.
The assembly defined in claim 7 wherein said formations are wedge-section ribs.
9.
The assembly defined in claim 7 wherein said formations are spaced apart elements formed on said inner wall 10