Title:
FOOD STORAGE CONTAINER
Document Type and Number:
WIPO Patent Application WO/2021/199372
Kind Code:
A1
Abstract:
[Problem] To provide a food storage container wherein blood or juice does not seep into the container material, said food storage container being configured such that there is virtually no level difference at the four corners of the container and no air gaps occur when a top seal is provided to the container. [Solution] A pulp material, or the like, is formed into a heavy duty paper article. The heavy duty paper article is coated with a thermoplastic resin that has heat sealing ability. The heavy duty paper article has, at each corner, side surface pieces and a folding piece that connects the side surface pieces adjacent to each other. The top end of the folding piece is formed such that one end reaches the middle of a flange portion of the upper side surface piece and the other end does not reach the flange portion, and the side surface pieces are bonded with each other in an overlapping manner with the folding piece being interposed therebetween. As a result, the contact part of the flange is able to be formed flat.
Inventors:
SATOU ISAMU (JP)
Application Number:
PCT/JP2020/014993
Publication Date:
October 07, 2021
Filing Date:
April 01, 2020
Export Citation:
Assignee:
SATOU ISAMU (JP)
International Classes:
B65D1/34
Domestic Patent References:
| WO2011052507A1 | 2011-05-05 | |||
| WO2020080059A1 | 2020-04-23 |
Foreign References:
| JP2017036086A | 2017-02-16 | |||
| GB2076783A | 1981-12-09 | |||
| JP2013028346A | 2013-02-07 | |||
| US5244145A | 1993-09-14 | |||
| JPS5572614U | 1980-05-19 |
Attorney, Agent or Firm:
INAGAKI Hitoyoshi (JP)
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