CLOSED TYPE LAMINATE TUBE, AND UNSEALING CAP

摘要

PROBLEM TO BE SOLVED: To easily and adequately open a closed type laminate tube of the diameter below ϕ 13 mm by reducing the difference in the stress resistance during the unsealing between a pointed head of a conical body having a ridge portion and a top face of a base part.

SOLUTION: In an unsealing cap for a closed type laminate tube, a screw part 5 to be screwed to a tip part of the tube and an unsealing recessed part 7 opened in the other end side are demarcated by a partition member 6. A pointed head shaped unsealing projection 10 is erected at the center on the unsealing recessed part 7 side of the partition member 6. The unsealing projection 10 has the diameter slightly smaller than the diameter of the tip part of the laminate tube, and comprises a base part 12 having a steep shoulder part, and a conical body 15 having three or four ridge portions 14 rising the shoulder part of the base part.

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