Compactor bag with a check valve

Abstract

A compactor bag which has a substantially rectangular bag body 11 made of synthetic resin films 12 and 13 , the bag body having an openable side 14 provided with a zipper 15 through which an item can be put into and taken out of the bag body 11 . Check valve portions 20 are provided in right-triangular areas at both corners of a side opposite the openable side 14 . Each of the check valve portions 20 has a flat and closable air release path 22 which is formed by fused portions f, g and 21 of the films 12 and 13 , and air inside the bag body 11 is guided into the air release path 22 by the hypotenuse of the right-triangular area and is exhausted from the bag body 11 as indicated by arrow “d”. The check valve portions 20 communicate with a packing space of the bag body 11 at the respective hypotenuses of the right-triangular areas. The check valve portions may be made of thin and soft films inserted between the films 12 and 13.

1 . A compactor bag which comprises a substantially rectangular bag body made of a synthetic resin film, the bag body having an openable side provided with a zipper through which an item can be put into and taken out of the bag body, said compactor bag comprising: 
 a check valve portion which is located in a right-triangular area on at least one corner of a side opposite the openable side of the bag body,    wherein: 
 the check valve portion comprises a flat and closable air release path which is formed by fused sides crossing at a right angle and a partly fused portion of films located in the right-triangular area, air inside the bag body being guided into the air release path by a hypotenuse of the right-triangular area and being exhausted; and  
 the check valve communicates with a packing space of the bag body at the hypotenuse of the right-triangular area.  
   
     
     
         2 . A compactor bag according to  claim 1 , wherein check valve portions are provided at two corners of the side opposite the openable of the bag body.  
     
     
         3 . A compactor bag according to  claim 1 , wherein the check valve portion is formed of mutually facing surfaces of the synthetic resin film which forms the bag body.  
     
     
         4 . A compactor bag according to  claim 1 , wherein the check valve portion is made of a thin synthetic resin film which is inserted in the synthetic resin film of the bag body.