Plastic bag and a protective container therefor and a fixture for securing the bag in the container

Abstract

A package for bulk materials having a box-like protective container and a plastic bag liner, and means for securing the bag in the container by a triangularly shaped flap formed by a fold of the bag wall, said means comprising a channel member and an elongated metal strip adapted to be secured in the groove of the channel member and secure the flap therebetween, said bag also having triangularly shaped flaps for filling and emptying the bag.

What is claimed is: 
     
       1. A large plastic bag adapted to contain granular material and disposed in a protective container having front and back doors and a floor, said bag being closed by weld lines at each end and folded to form a pair of oppositely disposed triangularly shaped integral flaps projecting outwardly from the said end; means for anchoring a first flap to the floor of the container comprising a channel member having said flap wound thereabout and means for pressing the wound flap against said channel member, means carried by said container for securing the channel member and said flap pressed thereagainst to the floor of the container; a second flap at the opposite end of the bag in the same plane as the first flap and adapted for emptying the bag; means for securing the second flap to the floor of the container adjacent to the front door of the container while the bag is being loaded and is storing bulk material, a third flap on the same end of the bag as the emptying flap, a series of elements arranged to form a vertical grating in the container immediately behind the front door and provided with a clearance through which loading and unloading flaps project, a cross-bar inserted above the grating for retaining the flap used for loading the bag and means comprising a hopper secured to the unloading flap for unloading the bags contents when the door is open and the container is inclined from horizontal. 
     
     
       2. The product of claim 1 wherein the said plastic bag has been obtained by welding an extruded tubular film at spaced points to form two ends, the two welds being parallel to each other and perpendicular to the generating line of the tube; said tube having been under tension while it was welded to form a pair of triangularly shaped flaps at the opposite ends of the bag. 
     
     
       3. The product of claim 1 wherein the said channel member for the anchoring of one flap to the floor of the container has a substantially U-shaped cross-section, said triangle is wound thereabout, and a pressure rod is secured in the longitudinal groove of the channel member by means of screws and wing nuts, the ends of said channel member being inserted into two profiled angle irons fixed to the opposite walls of the container. 
     
     
       4. The assembly of claim 1 wherein the means for anchoring the discharging flap consists of a substantially U-shaped member and screws and nuts adapted for locking the discharge flap between the floor and the last element of the grating and, adjacent each screw and on the inner side of the container, a protecting plate suitable for preventing damage to the bag during the tightening of the screws. 
     
     
       5. The assembly of claim 1 wherein the elements forming said grating consist of metal rod-like profile irons insertable by their ends into vertical guides on uprights fixed to the front uprights of the container. 
     
     
       6. The assembly of claim 1 wherein said loading flap is wound about and fixed on a bar whose ends are insertable into seats provided for that purpose above the grating. 
     
     
       7. A container for bulk material comprising a protective box having front, rear, top, bottom and sidewalls and a plastic bag liner, said bag having closed ends each with a pair of triangularly shaped folds extending as flaps and integral with the bag wall, a first flap being adapted to be used for emptying the bag when tilted and a second flap on the opposite end of the bag and in the same plane as the first flap and means anchoring said bag in the box to the bottom wall thereof comprising a channel member, said second flap being wound about said channel member, a bar-like member secured in the groove of the channel member with the underlying portion of the flap pressed in the groove, and a pair of C-shaped members secured to the bottom wall of the box adjacent to opposite side walls, said channel member having its ends inserted in said C-shaped members. .Iadd. 8. A large plastic bag adapted for the storage and transportation of bulk granular material while positioned within a protective outer container having a discharge opening and a bottom supporting surface for the bag, said bag being sealed at each end and folded to form a pair of oppositely disposed triangularly shaped integral flaps projecting outwardly from each of said ends; means for anchoring a first flap of the bag to the bottom supporting surface of the container comprising a channel member having said first flap wound thereabout and means for retaining the wound flap against said channel member; means carried by said container for securing the channel member and said first flap pressed thereagainst to the bottom supporting surface of the container at the location some distance from the discharge opening of the container; a second flap at the opposite end of the bag in the same plane as the first flap but located adjacent the discharge opening of the container and adapted for emptying the bag through said discharge opening; means for securing the said second flap to the bottom surface of the container adjacent to the discharge opening of the container while the bag is being loaded or is storing or transporting said bulk material; a third flap on the same end of the bag as the said second flap, and used for loading the bag; a series of elements arranged to form a grating in the container immediately behind and adjacent the discharge opening of the container and provided with clearances through which each of said second and said third flaps can project; a crossbar positioned in the container near the top of the grating for retaining the said third flap; and means comprising a hopper adapted to be secured to the said second flap for facilitating the unloading of the contents of the bag through said discharge opening when the container with the bag disposed therein is inclined from the horizontal. .Iaddend..Iadd. 9. A large plastic bag adapted to contain granular material while disposed in a protective container having a floor and at least one port for charging and discharging said granular material; said bag being closed by weld lines and folded to form a pair of oppositely disposed triangularly shaped integral flaps projecting outwardly; means for anchoring a first flap to the floor of the container comprising a channel member having a flap wound thereabout and means for pressing the wound flap against said channel member; means carried by said container for securing the channel member and said flap pressed thereagainst to the floor of the container; a second flap in the same plane as the first flap and adapted for emptying the bag; means for securing the second flap to the floor of the container adjacent to said port of the container while the bag is being loaded and is storing bulk material; a third flap on the same end of the bag as the emptying flap; a series of elements arranged to form a grating in the container convering said port and providing with a clearance through which loading and unloading flaps project; a cross-bar inserted above the grating for retaining the flap used for loading the bag; and means comprising a hopper secured to the unloading flap for unloading the contents of the bag when the port is open. .Iaddend.