SYNTHETIC RESIN CAP, CLOSING DEVICE, AND PACKAGED BEVERAGE

摘要

A cap main unit has the top plate whose inner surface is formed with an annular seal projection which is to be fitted on a vessel mouth. A threaded portion having a peripheral formation angle of 600-720[deg], is formed on the inner peripheral surface of a sleeve of the cap main unit, and is divided into several equally spaced threaded partitions. Independent claims are also included for the following: (1) closing device; and (2) packaged beverage.