초록 ▼

A flexible and collapsible bulk bag having an upright orientation in use with top and bottom end access openings to the exterior of the bag through which a flexible and collapsible liner is received in the bag, the liner also having top and bottom access openings through which the bulk contents are

A flexible and collapsible bulk bag having an upright orientation in use with top and bottom end access openings to the exterior of the bag through which a flexible and collapsible liner is received in the bag, the liner also having top and bottom access openings through which the bulk contents are respectively entered and discharged. When the bag is expanded and filled it has a pair of spaced apart and generally conical ends formed by four triangular portions interconnected by four generally rectangular side walls, with the ends convergently tapering toward their associated access opening. The bag when empty can be collapsed into a compact, flat configuration having a pair of overlying front and rear panels with a pair of folded gusseted side panels received therebetween. Alternatively the liner has a rigid discharge outlet spout and a protective exterior flap spans beneath the spout outlet closure to serve as an openable, flexible protective barrier for the same. When the bag is full and ready to be discharged, the bag and liner are suspended vertically by hoisting from the bag hanger straps. A pair of squeeze nip rollers may then be applied across the front and rear panels and then pulled downwardly therealong to thereby squeeze any remaining contents out the liner discharge opening. When the discharge outlets of the liner and bag are made of flexible and compressible material, the nip roller squeegee stroke continues therealong the material of these outlets to also empty any contents remaining therein.

대표청구항 ▼

In combination with a flexible and collapsible bulk bag having an upright orientation in use with a side wall, top and bottom ends and top and bottom end openings to the exterior of the bag through which contents are respectively entered and discharged, a flexible and collapsible liner received in s

In combination with a flexible and collapsible bulk bag having an upright orientation in use with a side wall, top and bottom ends and top and bottom end openings to the exterior of the bag through which contents are respectively entered and discharged, a flexible and collapsible liner received in said bag generally complementary thereto and having a side wall, top and bottom ends and top and bottom openings through which the contents are respectively entered and discharged, said bag comprising a tubular blank of reinforced flexible woven material, the blank having a circumferentially continuous central portion and four isosceles triangular portions adjacent each end constructed and arranged such that said bag when expanded has a generally cubical configuration with a pair of generally rectangular side wall panels connected by a pair of gusseted side panels and such that when the bag is empty it can be collapsed and folded into a generally flat configuration, and wherein each of the triangular portions extend from the blank central portion toward an apex of the triangular portion, connector means connecting together adjacent triangular portions adjacent their edges along lines of connection extending from at least closely adjacent the central portion toward their associated apexes at least half of the distance therebetween, and the lines of connection associated with the triangular portions adjacent the associated end of the central portion terminating short of their apexes so as to at least in part define an access opening therethrough adjacent the center of the associated end defined by such triangular portions when such bag is expanded such that when filled such bag has a pair of spaced apart and generally conical ends interconnected by four generally rectangular side walls with the ends convergently tapering toward their associated access opening, and wherein said bag end triangular portions when the bag is empty can be collapsed into a compact configuration having a pair of overlying front and rear panels with a pair of folded gusseted side panels received therebetween with the fold line between adjacent gusseted panels extending between substantially the apexes of their associated opposed triangular portions and the fold lines lying closely adjacent each other; the improvement in combination therewith comprising laterally spaced apart first and second U-shaped hanger straps formed at the top end of said bag and together flanking said bag and liner top openings, each said hanger strap comprising a first two-ply extension formed from a portion of said front panel triangular portion and a portion of the side panel triangular portion connected thereto and extending upwardly beyond the bag top access opening from said connector means joining said front and side panel triangular portions and terminating at a free end edge, and a second two-ply extension formed from a portion of said rear panel triangular portion and a portion of the side panel triangular portion connected thereto and likewise extending upwardly beyond the bag top access opening from said connector means joining said rear and side panel triangular portions and terminating at a free end edge, said first and second two ply extensions having mutually overlapped portions permanently interconnected to thereby form a U-shaped hanger loop configuration having a four-ply thickness where said extensions mutually overlap, and wherein the apices of said straps are coaxially aligned and spaced beyond said top bag and liner access openings when the same are closed.