| 主权项 |
1. A cap, which comprises a cap body to be fitted into a container mouth section and is made of a synthetic resin, wherein the cap body includes
a cylindrical wall section to be fitted into an inner wall surface of the container mouth section, an annular wall section that (i) extends obliquely in an upper direction toward a radial-direction center, integrally from an inner wall surface of the cylindrical wall section, (ii) has a lower wall surface of a truncated conical shape, and (iii) has a discharge hole in a radial-direction center portion, an elastic check valve disposed above the annular wall section the check valve having a valve section configured as a curved wall section with an upwardly convex shape making a dome configuration, the valve section having an inverted conical surface on its most outer surface, an annular valve seat having an inverted conical surface formed on an inner wall surface of the discharge hole allowing the whole inverted conical surface of the valve section to be detached from or seated on the inverted conical surface of the annular valve seat so as to open and close the discharge hole, and a guiding tubular body disposed above the check valve and having a discharge passage of contents from the discharge hole, wherein a lower end edge of the annular valve seat and a lower end edge of an outer circumferential surface of the valve section are both configured to be positionally correspondent with each other when the outer circumferential surface of the valve section is seated on the annular valve seat. |
