TAPERED CLOSURE AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To minimize a residue of the content in a container by a method wherein the container comprises a peripheral edge closure side wall having an upper closure side wall equipped with an upper surface having a circumference, and a lower closure side wall equipped with a bottom surface having a circumference, and a stage which is concentrically integrated with the peripheral edge closure side wall, and has a surface which sinks from the upper surface. SOLUTION: At an upper part of this tapered closure, a stage 91 and an upper closure side wall 92 which is concentric with the stage 91 are provided. The stage 91 comprises an upper stage surface 113, a peripheral edge stage side wall which is concentric and integrated with the upper stage surface 113, and a lower stage surface, and sinks from the upper surface of the upper closure wall 92. Also, at a lower part of this tapered closure, a lower closure side wall 108 for the peripheral edge which extends from the upper stage surface 113 to a lower closure side wall bottom surface 111, is provided. The lower closure side wall 108 is integrated with the upper closure side wall 92. By this method, a residue stays on the stage surface 91, and the residue is prevented from returning to the inside of this container.