Shrinkable sleeve adapted for cable and tubing gas flow blocking

DETAILED DESCRIPTION Accordingly, it is an object of this invention to provide a compact one-piece shrinkable unbranched sleeve of minimal outside dimension for sealing the ends of an electrical cable and/or tubing bundle to prevent the flow of gas and vapors therethrough.
It is a further object of this invention to provide a compact one-piece shrinkable sleeve of minimal outside dimension that provides an effective barrier for the prevention of the flow of gas and vapors through open spaces and interstices contained within a bundle and that further provides a means of containing and aligning a plurality of conductors and/or tubes within the sleeve before they emerge therefrom.
It is a feature of this invention to provide a compact one-piece shrinkable sleeve of minimal outside dimension having one or more open-ended channels disposed internally within the sleeve that are adapted to contain and align individual electrical conductors and/or tubes or groups thereof extending from the end of the bundle and have walls that are adapted to constrict against the conductors and/or tubes when the sleeve is shrunken onto the end of the bundle to secure the engagement therebetween so as to provide an effective barrier to the flow of gas and vapors through any open spaces or interstices between the electrical conductors and/or tubes present within the bundle.
The gas flow barrier means of the present invention provides a compact one-piece shrinkable sleeve of minimal outside dimension having one or more internal open-ended channels disposed therein that are adapted to contain individual electrical conductors and/or tubes or groups thereof in the combinations desired such that, when the sleeve is caused to shrink onto the bundle end to secure the engagement therebetween, the walls of the channels constrict against the conductors and/or tubes to provide an effective barrier against gas flow through the open spaces or interstices within the bundle.
The shrinkable sleeve of the present invention further provides for the use of an adhesive or other suitable material to aid in the filling of air spaces and voids associated with the bundle to enhance the securement of the sleeve to the bundle and on the internal surface of the channel walls where such is desired to enhance the sealing engagement between the shrunken channel wall and the electrical conductor or tube or groups thereof contained within the respective channels