Apparatus for sealing test tubes and the like
A sealing mat for sealing the open mouths of an array of test tubes. The mat includes a flexible carrier sheet having an array of mutually spaced pegs projecting downwardly therefrom and a plurality of plugs. The plugs are externally configured and dimensioned to be inserted in and to seal the open mouths of the test tubes. Each of the plugs has an upwardly facing recess internally configured and dimensioned to receive and coact in frictional engagement with a respective one of the pegs to thereby releasably secure the plugs to the carrier sheet. The carrier sheet is separable from the thus inserted plugs by flexure to extract the pegs from the recesses.
1. A sealing mat for sealing the open mouths of an array of test tubes, said sealing mat comprising:
a flexible carrier sheet having an array of mutually spaced pegs projecting downwardly therefrom; and
a plurality of plugs, said plugs being externally configured and dimensioned to be inserted in and to seal the open mouths of said test tubes, each of said plugs having an upwardly facing recess internally configured and dimensioned to receive and coact in frictional engagement with a respective one of said pegs to thereby releasably secure said plugs to said carrier sheet, said carrier sheet being separable from the thus inserted plugs by flexure to extract said pegs from said recesses.
2. The sealing mat of claim 1 wherein said pegs and said recesses are configured to coact in frictional engagement at spaced locations separated by open spaces.
3. The sealing mat of claim 1 or 2 wherein circular rims surround the open mouths of said test tubes, and wherein said plugs have peripheral collars arranged to contact said rims and thereby limit the extent to which said plugs may be inserted into said test tubes.
4. The sealing mat of claim 3 wherein said recesses are surrounded by and spaced inwardly from said collar.
5. The sealing mat of claim 1 wherein said plugs have cylindrical side walls terminating in tapered noses.
6. The sealing mat of claim 5 wherein said plugs have peripheral collars projecting radially and externally from said cylindrical side walls.
7. The sealing mat of claim 1 wherein said plugs are provided with circular beads configured to coact with internal grooves in the upper regions of said test tubes.