(under the class definition) Sealing means including means allowing breaking or tearing of the seal.
SEE OR SEARCH CLASS
413, Sheet Metal Container Making, for a process or apparatus for performing an attendant operation before final assembly of a lid to a receptacle;
12+, for a process of fabricating a frangible end closure or assembling a frangible part to an end closure or subclasses 67+ for apparatus to form lid having means to form frangible zone in lid.
