| 摘要 |
PROBLEM TO BE SOLVED: To provide a lid structure, by which its strength is improved, its durability is enhanced, which is integrally molded by a blow molding method so as to easily manufacture and contrived to reduce its production cost and enhanced its rigidity and its mating surface of which can be simultaneously made to be a sealing surface. SOLUTION: In this lid structure, a whole lid 1 equipped with an outer peripheral edge part 2 having double or inner and outer ribs 3 and 4 opposing face to face between a sealing surface 2a integrally molded by a blow molding method so as to install a seal to the sealing surface 2a. As a result, the rigidity of the whole lid is improved remarkably and the installation of the seal becomes easy, since the seal installing surface between the double ribs is formed into a recessed form, and, at the same time, a favorable sealing action to the open peripheral edge part of a container main body can be realized. |
