Abstract: A protective sleeve comprising a sheet of sleeve-forming, chemically-dilated, elastomeric material which shrinks upon exposure to ambient air. The sheet has first and second opposed edges that can be brought into adjacency. The protective sleeve further includes a locking device comprising two locking members extending from the respective opposite edges of the sleeve. The locking members are formed of a material that is dimensionally stable upon exposure to air and substantially more rigid than the material from which the sleeve is made. The locking members provide a rigid locking surface which can adjoin the opposed edges of the sleeve to retain those edges in adjacency when the sleeve is positioned about a pipe, conduit, cable, or like member, and then exposed to ambient air to shrink around such a member.

Abstract: A protective plastic sleeve device is provided to be wrapped around, and hence to seal, the juncture along a joined series of elongated pipes, cables, conduits or similar members. The sleeve device includes a plastic sheet whose end portions are folded back and attached, to form a pair of passageways. Rods extend through each of the passageways. Apertures are provided along the end portions to communicate with the passageways. Engagement means, advantageously in the form of alternative male and female members, project from the rods through the apertures to interlock the rods together and hence retain the end portions of the sheet in juxtaposed confronting relationship.

Abstract: A package is provided for a storage of dilated protective elastomeric sleeve of the type which shrinks upon exposure to ambient air. The package is formed by two concentrically arranged tubular members, one of which is positioned over the sleeve. Both tubular members have a length exceeding the length of the sleeve. The ends of the inner tubular member are sealed to the interior surface of outer tubular member, thereby forming a hermetically sealed chamber within which the sleeve is disposed. The ends of the outer tubular member are then sealed to completely close the package.