Inner bag for bag-in-box

Abstract

An inner bag for bag-in-box capable of increasing an easiness in handling and convenience when a filled inner bag ( 1 ) for bag-in-box is handled without an outer box, where reinforced heat sealed parts ( 5, 5′ ) formed by cutting out side films ( 4, 4′ ) and sealing a front film ( 6 ) with a rear film are provided continuously or closely to heat sealed parts ( 2, 3 ) on an upper side on/or a lower side of the inner bag, or a holding part is provided formed by sealing the front film ( 6 ) with the rear film through or without through the side films ( 4, 4′ ) so that a not sealed part ( 17 ) between the side films ( 4, 4′ ) is formed at or near at least one corner part between the films and the heat sealed parts ( 2, 3 ) and so that, when a hand is accessed to the outside of the inner bag ( 1 ) through the not sealed part ( 17 ).

1 . A gazette shape inner bag for bag-in-box whose side film to be folded is composed of a laminated film prepared by laminating multi layers so as a resin layer which is hard to be adhered by heat sealing is arranged at the surface, comprising reinforcing heat sealed parts formed by cutting out side films and sealing a front film with a rear film are provided continuously or closely to heat sealed parts on an upper side and/or a lower side of the inner bag.  
     
     
         2 . The inner bag for bag-in-box of  claim 1 , wherein the front film is adhered by heat sealing with the rear film by cutting out the side film at a corner part or near the corner part.  
     
     
         3 . The inner bag for bag-in-box in accordance with  claim 1  or  claim 2 , wherein said inner bag possesses a fin part of triangle shape which is divided from a containing part by a heat sealed part.  
     
     
         4 . The inner bag for bag-in-box of  claim 3 , wherein at least one fin part is cut off.  
     
     
         5 . The inner bag for bag-in-box of  claim 4 , wherein all fin parts locating at the lower side are cut off.  
     
     
         6 . A gazette shape inner bag for bag-in-box prepared by adhering by heat sealing of one or more sheets of film, wherein said inner bag possessing a holding part formed by sealing the front film with the rear film through or without through the side film so that a not sealed part between the films is formed at or near at least one corner part between the films and the heat sealed parts and so that, when a hand is accessed from the side part of the inner bag, fingers are passed to the outside of the inner bag through the not sealed part.  
     
     
         7 . The inner bag for bag-in-box of  claim 6 , wherein the holding part is prepared on both side of the heat sealed part locates at upper and/or lower side.  
     
     
         8 . The inner bag for bag-in-box in accordance with  claim 6  or  claim 7 , wherein said inner bag possesses a cut out part prepared by cutting off one part or all part of film of the not sealed part locating at upper and/or lower side.  
     
     
         9 . The inner bag for bag-in-box in accordance with any one of  claims 6  to  8 , wherein said inner bag possesses a fin part divided by triangle shape, further the holding part is formed on said fin part.  
     
     
         10 . The inner bag for bag-in-box of  claim 9 , wherein all fin parts locating at the lower side are cut off.  
     
     
         11 . The inner bag for bag-in-box in accordance with any one of  claims 6  to  10 , wherein the side film is the laminate which laminate so as resin layer which are hard to be adhered by heat sealing to be arranged at the surface, and the holding part is prepared by sealing without sealing the side film by preparing a punch hole on the side film.