Title:
逆止弁及び密封袋、及び逆止弁と密封袋の製造方法
Document Type and Number:
Japanese Patent JP4436925
Kind Code:
B1
Abstract:
To provide a check valve and a sealing bag that are high in certainty of the checking effect and prevented as much as possible from increasing in the production cost. A check valve V includes base sheets 31 and 32, made of a flexible resin, and a plurality of valve body sheets 4, at least two of the valve body sheets 4, that is, an upstream valve body sheet 4a and a downstream valve body sheet 4b form a single set and both are adhered to one base sheet 31, the adhesion of the upstream valve body sheet 4a to the one base sheet 31 is achieved at an upstream end 4a1 side with a downstream end 4a2 side being movable with respect to the base sheets 31 and 32, the adhesion of the downstream valve body sheet 4b is achieved at a downstream end 4b2 side with an upstream end 4b1 side being movable with respect to the base sheets 31 and 32, and the respective ends 4a2 and 4b1 of the valve body sheets 4a and 4b at the sides made movable with respect to the base sheets 31 and 32 are closely contactable with the other base sheet 32.
Inventors:
Mikio Tanaka
Application Number:
JP2009249844A
Publication Date:
March 24, 2010
Filing Date:
October 30, 2009
Export Citation:
Assignee:
Assist Co., Ltd.
International Classes:
B65D30/24; F16K15/20; F16K24/04; F16K27/00
Domestic Patent References:
| JPH0542034Y2 | 1993-10-22 | |||
| JP2535548Y2 | 1997-05-14 | |||
| JPH0518275Y2 | 1993-05-14 | |||
| JP2006207743A | 2006-08-10 | |||
| JPH088996Y2 | 1996-03-13 | |||
| JP2691881B2 | 1997-12-17 |
Attorney, Agent or Firm:
Takenobu Samejima