Evacuable bag

Abstract

An evacuable bag having a passage ( 4 ) for dearation formed in a bag body ( 1 ) having an opening ( 2 ) for inserting an article into the bag and composed of flexible non-breathable sheets ( 11, 12 ), wherein the passage comprises an opening ( 11 a ) formed in the sheet ( 11 ) and a flexible cylindrical air passage communicating with the opening ( 11 a ), the air passage serving to check air flow from outside the bag body ( 1 ) into thereinside, and a nozzle of a vacuum or the like or the like is inserted through through the opening ( 11 a ) into the air passage, whereby the air is expelled out from inside the bag body ( 1 ). Since the bag body ( 1 ) and the passage ( 4 ) are flexible, the evacuable bag as a whole can be made flexible. Furthermore, the air passage ( 41 ) does not protrude out of the bag body ( 1 ), so the air passage ( 41 ) does not become an obstacle in use or storage. Since both aremade of flexible material, the bonded portions of the two will not separate even if an external force is applied thereto.

What is claimed is:  
     
         1 . An evacuable bag for packing bedding, clothing and food, which bag comprises a bag body ( 1 ) made of flexible non-breathable sheets ( 11 ), ( 12 ) and having a closable opening ( 2 ) for inserting an article to be contained, and a passage ( 4 ) for deaeration formed in the bag body ( 1 ), 
 characterized in that the passage ( 4 ) for deaeration includes an opening ( 11   a ) formed on said sheet ( 11 ) and a flexible cylindrical air passage ( 41 ) mounted inside the bag body ( 1 ) so as to communicate with said opening ( 11   a ),    wherein said air passage ( 41 ) checks air flow from outside to inside the bag body ( 1 ) and expels the air from inside to outside the bag body ( 1 ) by inserting a rod ( 5 ) such as a nozzle of a vacuum or the like through the opening ( 11   a ) into the air passage ( 41 ).    
     
     
         2 . The evacuable bag as defined in  claim 1 , 
 characterized in that at least a portion ( 43   j ) of the air passage ( 41 ) around the opening ( 11   a ) and a predetermined position ( 43   k ) of the air passage ( 41 ) closer to the inside of the bag than the intermediate position (C) of the air passage ( 41 )are fixed to the inner surface of the bag body ( 1 ).    
     
     
         3 . The evacuable bag as defined in  claim 2 , 
 characterized in that the air passage ( 41 ) is a shut-off valve including a flap ( 42 ) thereinside, the flap ( 42 ) serving to check air flow from outside to inside the bag body ( 1 ).    
     
     
         4 . The evacuable bag as defined in  claim 1 , 
 characterized in that the air passage ( 41 ) includes openings ( 43   c ), ( 43   g ) positioned at both ends thereof in one axial direction and along at least one of opposite sheets ( 43   a ), ( 43   b ), and closed members ( 43   e ), ( 43   f ) positioned at both ends thereof in the other axial direction perpendicular to said axial direction and along at least one of said sheets, thereby becoming a flat and substantially cylindrical passage in cross section,    a flap ( 42 ) being mounted on an air-passage-side surface ( 43   h ) of one of said sheets ( 43   b ) of the air passage ( 41 ) by being fixed from one of the closed members ( 43   e ) to the other closed member ( 43   f ) along the sheet ( 43   b ), thereby comprising a first check valve and a second check valve;    the first check valve, part of said flap ( 42 ), serving to check air flow from one end of the air passage ( 41 ) to the other by contacting an air-passage-side surface ( 43   i ) of the sheet ( 43   a ), while the second check valve, likewise, serving to check the reverse air flow in the air passage ( 41 ),    a rod  5  being inserted into the air passage ( 41 ) so as to communicate the openings ( 43   c ), ( 43   g ) at both ends thereof each other, wherein the contact between the flap ( 42 ) and the sheet ( 43   a ) is disengaged, thereby being an air-flowing state in the air passage ( 41 ), and    the air passage ( 41 ) returning to be a closed state after the rod is pulled out.    
     
     
         5 . An evacuable bag for packing bedding, clothing and food, which bag comprises a bag body ( 1 ) made of flexible non-breathable sheets ( 11 ), ( 12 ) and having a closable opening ( 2 ) for inserting an article to be contained, and a passage ( 4 ) for deaeration formed in the bag body ( 1 ), 
 characterized in that the passage ( 4 ) for deaeration includes an opening ( 43   g ) formed on the outer surface of the bag body ( 1 ) and a flexible cylindrical air passage ( 41 )communicating with the opening ( 43   g ),    the air passage ( 41 ) including openings ( 43   c ), ( 43   g ) positioned at both ends thereof in one axial direction and along at least one of opposite sheets ( 43   a ), ( 43   b ), and closed members ( 43   e ), ( 43   f ) positioned at both ends thereof in the other axial direction perpendicular to said axial direction and along at least one of said sheets, thereby becoming a flat and substantially cylindrical passage in cross section,    a flap ( 42 ) being mounted on an air-passage-side surface ( 43   h ) of one of said sheets ( 43   b ) of the air passage ( 41 ) by being fixed from one of the closed members ( 43   e ) to the other closed member ( 43   f ) along the sheet ( 43   b ), thereby comprising a first check valve and a second check valve;    the first check valve, part of said flap ( 42 ), serving to check air flow from one end of the air passage ( 41 ) to the other by contacting an air-passage-side surface ( 43   i ) of the sheet ( 43   a ), while the second check valve, likewise, serving to check the reverse air flow in the air passage ( 41 ),    a rod  5  being inserted into the air passage ( 41 ) so as to communicate the openings ( 43   c ), ( 43   g ) at both ends thereof each other, wherein the contact between the flap ( 42 ) and the sheet ( 43   a ) is disengaged, thereby being an air-flowing state in the air passage ( 41 ), and    the air passage ( 41 ) returning to be a closed state after the rod is pulled out.