Packing bag

Abstract

To provide a packing bag, with which waste refuse is not generated, used in good appearance after opening, the bag is composed of a rectangular sheet piece 1 of synthetic resin, the sheet piece 1 is folded on two convex folded line portions 18 and a concave folded line portion to form a folded portion 10 serially having a first sheet layer 11, a second sheet layer 12, a third sheet layer 13, and a fourth sheet layer 14 on an end edge portion 1 A to form M-shape in longitudinal cross section; the first sheet layer 1 and the second sheet layer 2 are fused, and the third sheet layer 3 and the fourth sheet layer 4 are fused; a separation-prepared line portion 5 to separate the second sheet layer 2 and the third sheet layer is formed along the concave folded line portion 19 between the second sheet layer 2 and the third sheet layer 3; a fastener 4 to mutually seal the second sheet layer 2 and the third sheet layer 3 is provided; and the separation-prepared line portion 5 is disposed on an inner side of the bag to the fastener 4.

1 . A packing bag composed of a rectangular sheet piece ( 1 ) of synthetic resin characterized by that:
 the sheet piece ( 1 ) is folded on two convex folded line portions ( 18 ) and a concave folded line portion ( 19 ) to form a folded portion ( 10 ) serially having a first sheet layer ( 11 ), a second sheet layer ( 12 ), a third sheet layer ( 13 ), and a fourth sheet layer ( 14 ) on an end edge portion ( 1 A) to form M-shape in longitudinal cross section;   the first sheet layer ( 1 ) and the second sheet layer ( 2 ) are fused, and the third sheet layer ( 3 ) and the fourth sheet layer ( 4 ) are fused;   a separation-prepared line portion ( 5 ) to separate the second sheet layer ( 2 ) and the third sheet layer ( 3 ) is formed along the concave folded line portion ( 19 ) between the second sheet layer ( 2 ) and the third sheet layer ( 3 );   a fastener ( 4 ) to mutually seal the second sheet layer ( 2 ) and the third sheet layer ( 3 ) is provided; and   the separation-prepared line portion ( 5 ) is disposed on an inner side of the bag to the fastener ( 4 ).   
     
     
         2 . The packing bag as set forth in  claim 1 , wherein left and right both end edge portions ( 1 B) of the sheet piece ( 1 ) are welded in a state that the folded portion ( 10 ) is formed on the end edge portion ( 1 A), and an opening portion ( 3 ) to put a packed article (Z) in the bag is formed on another end edge portion ( 1 C). 
     
     
         3 . The packing bag as set forth in  claim 1 , wherein a slider ( 8 ) is attached to the folded portion ( 10 ) to open and close the fastener ( 4 ). 
     
     
         4 . The packing bag as set forth in  claim 1 , wherein a through hole ( 9 ) for suspension is formed on the folded portion ( 10 ). 
     
     
         5 . The packing bag as set forth in  claim 2 , wherein a slider ( 8 ) is attached to the folded portion ( 10 ) to open and close the fastener ( 4 ). 
     
     
         6 . The packing bag as set forth in  claim 2 , wherein a through hole ( 9 ) for suspension is formed on the folded portion ( 10 ).