Title:
UNSEALING STRUCTURE FOR CONTAINER, CONTAINER WITH THE STRUCTURE, AND METHOD OF PRODUCING THE STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2005/000698
Kind Code:
A1
Abstract:
An unsealing structure for a container, having excellent sealing ability and facilitating unsealing and resealing of the container. An unsealing structure for a container is constructed by integrally and continuously forming a cap portion (A) and a pouring portion (B). The structure is characterized in that the container is unsealed by breaking an easily breakable portion (11), located at the boundary between the cap portion and the pouring portion, by using its radial deformation and separating the cap and the pouring portion. Further, a method of producing the unsealing structure is characterized in that the structure is produced in the following way. A diameter-expanded portion is formed by expanding the diameter of a hollow-cylindrical portion from the inside outward and the easily breakable portion is formed in the diameter-expanded portion. The hollow-cylindrical portion is pressed in the height direction and is folded so that a to-be-intermediate-wall portion formed in the hollow-cylindrical portion becomes an intermediate wall and a to-be-outer-wall portion is folded around the intermediate wall to become an outer wall. A projection portion composed of triple walls, having an inner wall, the intermediate wall, and the outer wall, is formed, and a bending deformation portion is formed in a gap between the outer wall and the intermediate wall and/or in a gap between the intermediate wall and the inner wall. An engagement portion is formed on the projection portion.
Inventors:
KOBAYASHI TOMOMI (JP)
TAKAO KENICHI (JP)
NAGATA KOUJI (JP)
TAKAO KENICHI (JP)
NAGATA KOUJI (JP)
Application Number:
PCT/JP2004/009036
Publication Date:
January 06, 2005
Filing Date:
June 25, 2004
Export Citation:
Assignee:
TOYO SEIKAN KAISHA LTD (JP)
KOBAYASHI TOMOMI (JP)
TAKAO KENICHI (JP)
NAGATA KOUJI (JP)
KOBAYASHI TOMOMI (JP)
TAKAO KENICHI (JP)
NAGATA KOUJI (JP)
International Classes:
B21D51/50; B29C57/02; B65D41/34; (IPC1-7): B65D41/34; B65D51/16; B65D1/02; B21D51/38; B21D51/50; B29C57/02
Foreign References:
| JPS508746B1 | 1975-04-07 | |||
| JPH0656161A | 1994-03-01 | |||
| JPS63162465A | 1988-07-06 | |||
| US4703610A | 1987-11-03 |
Attorney, Agent or Firm:
Ohta, Akio c/o Ohta, Patent Office New State Manor Bldg 356 (23-1 Yoyogi 2-chome Shibuya-k, Tokyo 53, JP)
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