Abstract: Disclosed is a method and apparatus for sealing together two generally cylindrical thermoplastic members, each having a longitudinal axis, an open end and a closed end, so that upon being joined they form a sealed capsule that may be swallowed. One capsule member may be snugly inserted into a vibrating cavity with the opened end of the member available to be filled with an active composition. The other member is placed over the first member and pushed downwardly so that the open portions of both members overlap one another. The overlapping portions of the wall members abut each other at a cylindrical interface band. Vibration causes only the overlapping wall portions of the members to rub together, thereby generating heat around the interface band. The heat, so generated, melts enough thermoplastic material at that band to produce, on cooling, a strong circular bond between both members.

Abstract: An improved mounting between a cylindrical package, containing a sensitive instrument, and a protective cylindrical housing disposed thereabout. Plugs at opposite ends of the housing each have a conical recess opening toward the other plug and between which the package is confined. O-rings at each end of the package engage the tapered wall of the adjacent recess and absorb longitudinal and radial shock and center the package within the housing. To restrain relative rotational movement between the housing and instrument package, a plurality of coil springs are disposed within aligned bores in an end of the package and the adjacent plug.