Title:
AIRTIGHTLY SEALED BAG EQUIPPED WITH CHECK VALVE
Document Type and Number:
WIPO Patent Application WO/2020/115834
Kind Code:
A1
Abstract:
Provided is an airtightly sealed bag comprising a structure in which the function of a check valve is not readily affected even when the bag is expanded, and in which it is possible to suppress formation of dead space in a portion where a valve sheet is present, from the standpoint of storage. A front valve sheet 31 and a reverse valve sheet 32 are arranged between a front bag sheet 21 and a reverse bag sheet 22. The front valve sheet 31 and the reverse valve sheet 32 are not sealed, and the space between these two sheets also functions as a storage space. A check valve 14 is provided with a restriction seal 43 above valve seals 41, 42, whereby expansion of the bag is prevented from adversely affecting the closing function of the check valve 14.
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Inventors:
TANAKA MIKIO (JP)
Application Number:
PCT/JP2018/044687
Publication Date:
June 11, 2020
Filing Date:
December 05, 2018
Export Citation:
Assignee:
TANAKA TECHNICAL CORP (JP)
International Classes:
B65D30/24
Domestic Patent References:
| WO2006070467A1 | 2006-07-06 |
Foreign References:
| JPH0796948A | 1995-04-11 |
Attorney, Agent or Firm:
SAMEJIMA Takenobu (JP)
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