초록 ▼

A process of manufacturing a bulk bag begins with a tubular blank of woven polypropylene material which is cut along first transversely extending lines 64 to form the upper edges of lift sleeve portions 76, cut along longitudinally extending lines 66 to form the side edges of the lift sleeve portion

A process of manufacturing a bulk bag begins with a tubular blank of woven polypropylene material which is cut along first transversely extending lines 64 to form the upper edges of lift sleeve portions 76, cut along longitudinally extending lines 66 to form the side edges of the lift sleeve portions 76, and cut along substantially transversely extending lines 68 situated at the midpoint of the lines 66 to form opposed top wall halves 72 and opposed bottom wall halves 74. The top wall halves and the bottom wall halves are then sewn together along sew lines 82 and 84, respectively. Sidewalls 70' are joined to the bottom wall halves 74 along sew lines 86, and the top wall halves 72 are joined to the sidewalls 70' along sew lines 88. The lift sleeve portions 76 may be configured to provide lift sleeve, lift rope, or single point lift construction. The top and bottom walls may be provided with a fill chute and discharge chute, respectively.

대표청구항 ▼

[ We claim:] [1.] A flexible intermediate bulk container comprising:a flattened fabric tubular blank including:a sidewall,a top end defined by first transversely extending cut lines that intersect longitudinally extending cut lines to form opposed lift sleeve portions and a second transversely exten

[ We claim:] [1.] A flexible intermediate bulk container comprising:a flattened fabric tubular blank including:a sidewall,a top end defined by first transversely extending cut lines that intersect longitudinally extending cut lines to form opposed lift sleeve portions and a second transversely extending cut line that is spaced apart by said first transversely extending cut lines and intersects each of the longitudinally extending cut lines to form opposed top wall halves, anda bottom end defined by transversely extending cut lines that intersect longitudinally extending cut lines to form opposed bottom wall halves;lift sleeves formed by folding each lift sleeve portion over and securing the distal end of each lift sleeve portion to the proximal end;a top formed by folding the opposed top wall halves toward each other, securing the distal ends to each other, and securing the edge of the opposed top wall halves to the sidewall; anda bottom formed by folding the opposed bottom wall halves toward each other, securing the distal ends to each other, and securing the edges of the opposed bottom wall halves to the sidewall.