Patent ID: 11878832
Assignee: DAIWA CAN COMPANY
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A bottle-shaped can with a cap, comprising:
a neck portion on which a thread is formed, and on which the cap is mounted; and
a curled portion formed on an upper end portion of the neck portion, to which a sealing member affixed to an inner surface of the cap is contacted tightly to seal the neck portion;
wherein the curled portion includes a smooth top section formed by folding an end portion of a metallic seat forming the neck portion radially outwardly,
wherein:
the top section includes a leading end section as an upper end of the neck portion, a diametrically-largest section formed beneath the leading end section in which an outer diameter is largest, a diametrically-shrunk section extending downwardly from the diametrically-largest section in which an outer diameter is reduced gradually, and an outer circumferential wall section extending downwardly from the diametrically-shrunk section,
the leading end section, the diametrically-largest section, and the diametrically-shrunk section form a smooth curved surface,
a curvature of the outer circumferential wall section in a cross-section along a plane passing through a center axis of the neck portion is zero or negative value, given that a curvature of the diametrically-shrunk section is positive value,
a flexion section is formed between the diametrically-shrunk section and the outer circumferential wall section,
the outer diameter of the outer circumferential wall section in which the curvature is zero or negative value is larger than an outer diameter of the flexion section,
wherein the outer circumferential wall section in which the curvature is zero or negative value is shaped into a tapered shape in which the outer diameter is gradually increased downwardly, or a curved shape expanding downwardly, and
wherein an outer diameter of a lower sealing end as a lowest portion, to which the sealing member is contacted in the outer circumferential wall section shaped into the tapered shape or the curved shape expanding downwardly, is equal to or larger than the outer diameter of the diametrically-largest section.