Noneverting bottom for thermoplastic bottles

摘要: A generally cylindrical, biaxially oriented thermoplastic bottle for bottling liquids under pressure, such as beer, soda and aerosols, having a noneverting bottom conditions of use. The the in unpressurized state comprises shell material configuration defined series sequentially connected geometric shapes rotationally symmetrical about central axis starting with (a) 90* portion circle to cylindrical section bottle, forming annular edge, (b) straight line flat which is seating area (c) an toroidal knuckle turning into (d) re-entrant cylinder (e) 180* recessed ending (f) disc center bottle. To further improve eversion resistance, can include reinforcing ring attached knuckle. Under autogenous dimensions remain practically same except that moves outward now stands on turns upward cylinder.