Receptacle for semi-solid substances and having a non-round follower piston

Abstract

A receptacle (1) for containing a semi-solid substance, has an oblong cylindrical body surmounted by a neck for receiving a dispenser device of the type that does not allow ingress of air. The receptacle includes a follower piston (2) that slides with sealing contact inside the oblong cylindrical body as substance is expelled. The follower piston has an outer contact periphery (21) of oblong shape including two portions of greater curvature (21') defined by a pair of circular arcs having the same radius of curvature. The arcs being disposed opposite each other in first mirror symmetry (Sr) and being connected to each other by two connection segments (21"). Preferably, each of the two connection segments (21") is defined by at least one circular arc.

Dependencies are inferred from the claim text.