Abstract: A cap includes a main unit fit onto the mouth of a double-walled container, a spout cylinder provided on the main unit, an inner stopper that is provided in the main unit, and a first inner valve. The inner stopper includes a communicating part that communicates with the inside of the inner container and the inside of the spout cylinder. The first inner valve includes a first valve body that covers the communicating part. The first valve body has passage holes. The first valve body being deformed from a closing position S toward an opening position O keeps acting as a partition between the communicating part and the spout cylinder.

Abstract: A cap includes a main unit fit onto the mouth of a double-walled container, a spout cylinder provided on the main unit, an inner stopper that is provided in the main unit, and a first inner valve. The inner stopper includes a communicating part that communicates with the inside of the inner container and the inside of the spout cylinder. The first inner valve includes a first valve body that covers the communicating part. The first valve body has passage holes. The first valve body being deformed from a closing position S toward an opening position O keeps acting as a partition between the communicating part and the spout cylinder.

Abstract: A cap includes a main unit fit onto the mouth of a double-walled container, a spout cylinder provided on the main unit, an inner stopper that is provided in the main unit, and a first inner valve. The inner stopper includes a communicating part that communicates with the inside of the inner container and the inside of the spout cylinder. The first inner valve includes a first valve body that covers the communicating part. The first valve body has passage holes. The first valve body being deformed from a closing position S toward an opening position O keeps acting as a partition between the communicating part and the spout cylinder.

Abstract: A cap includes a main unit fit onto the mouth of a double-walled container, a spout cylinder provided on the main unit, an inner stopper that is provided in the main unit, and a first inner valve. The inner stopper includes a communicating part that communicates with the inside of the inner container and the inside of the spout cylinder. The first inner valve includes a first valve body that covers the communicating part. The first valve body has passage holes. The first valve body being deformed from a closing position S toward an opening position O keeps acting as a partition between the communicating part and the spout cylinder.

Abstract: In order to provide a check valve capable of sufficiently suppressing the mixing of air into the container even if a certain impact is applied to the container and also capable of stably maintaining good pouring of the content, a check valve 10 of the invention is formed of rubber material and manufactured by integral molding. The check valve 10 has a tubular main body 1 having openings 1a and 1b at opposite ends, a lid 3 arranged to close one opening 1a of the main body 1, and a hinge 5 that connects the main body 1 and the lid 3. The lid 3 has a projection 3a on the side surface 3b, the projection 3a coming in contact with a peripheral edge of the opening 1a of the main body 1.

Abstract: A hinge cap comprising a cap body composed of a top wall, an ejection port provided in the top wall and a sidewall suspending from the circumferential edge of the top wall, and an upper lid hinged to the cap body and closing the ejection port, characterized in that the cap is composed of polyalkylene alkanoate resin having a flexural elastic modulus of 200-900 MPa, more preferably 300-800 MPa.

Abstract: A heat-resistant cap for a container wherein the container includes a mouth having an external circumferential recess and a boss; an intermediate stopper having a latching portion engaged in pressure fit relation over the mouth such that a ridge provided on an inner circumferential surface of an intermediate tube is held in pressure fit relation with the external circumferential recess. An embrittled line is formed to extend circumferentially in the inner circumferential surface of the intermediate tube contiguous to an upper or lower edge of the recess. An outer lid is fitted over the intermediate stopper. An engagement portion provided on the outer lid is engaged in vertical relation with a latching portion of the intermediate stopper having a portion held in pressure fit relation with an outer circumferential surface of the intermediate tube.