Patent ID: 9637280
Date: 2017-05-02
CPC Classifications: B29C,B29L,B65D

Claim:
1. A cap configured to be attached to an extraction port of a container, comprising: a cap main body detached from the container at time of opening; a ring remained the container at the time of opening; and a passage portion, wherein the passage portion is formed separately from the cap main body and the ring and attached to the cap main body and the ring, or the passage portion is formed by covering a side surface and an upper surface of the cap main body with a cover and disposed in the cap main body and the ring; wherein the passage portion contains a detection member; wherein the passage portion includes a leg portion provided in the ring and the cap main body; wherein an internal space of an upper portion of the leg portion provided in the cap main body and an internal space of a middle portion between the upper portion and a lower portion of the leg portion provided in the ring communicate with each other by the passage portion through which at least one of air and the detection member passes; wherein the middle portion is configured to be broken when the cap main body is turned into a cap detaching direction, so that the internal space of the middle portion is exposed to an outside of the cap main body; and wherein, when the middle portion is exposed to an outside of the cap main body, a state of the detection member provided in the passage portion changes.