(under subclass 355) Devices, wherein the stopper is expanded into scaling engagement with the mouth of the receptacle to be sealed.
(1) Note. This and the indented subclasses do not include stoppers formed solely from a mass of resilient or deformable material which deforms as the stoppers are inserted into the receptacle mouth, e.g., corks.
SEE OR SEARCH CLASS
217, Wooden Receptacles,
78, 79, 108, and 109, for expanding type closures and bungs.
220, Receptacles,
233+, for expansible pluts for metallic receptacles.
