초록 ▼

In a method of automatically closing a large upright sack after filling, the top of the flattened filling end of the sack is folded over onto itself and a closure tape is secured to the folded-over portion and one wall of the sack, whereafter the filling end is re-erected substantially vertically, f

In a method of automatically closing a large upright sack after filling, the top of the flattened filling end of the sack is folded over onto itself and a closure tape is secured to the folded-over portion and one wall of the sack, whereafter the filling end is re-erected substantially vertically, folded in zig-zag fashion and pulled together to form a frill. The ends of the tape project beyond both sides of the filling end so that, after zig-zag folding of the filling end and tape and after the frill has been formed, the tape ends project from the same side of the frill and can be interconnected.

대표청구항 ▼

A method of filling and closing large sacks, each large sack having a tube section including side walls, a base, and an open end portion to receive material to be poured therein, the method comprising the steps of: engaging the open end portion of the sack at opposite sides thereof and opening the s

A method of filling and closing large sacks, each large sack having a tube section including side walls, a base, and an open end portion to receive material to be poured therein, the method comprising the steps of: engaging the open end portion of the sack at opposite sides thereof and opening the side walls of the sack; freely suspending the sack from its open end portion; depositing a pourable material through the open end portion of the freely suspended sack to partially fill the sack; gradually lowering the sack onto a support when a predetermined weight of material is deposited therein while maintaining tension on the side walls of the sack; laying together, stretching and inclining sideways through an angle, the sack walls disposed above the pourable material within the sack; folding the upper end portion of the sack over onto itself; placing closure tape onto the folded-over end portion of the sack and one sack wall; welding the folded-over end portion to the sack wall; moving the inclined side wall portion of the sack, disposed above the poured material, through an angle to a substantially vertical position; placing closure tape around an upper portion of the sack; folding the empty upper portion of the sack and tape in a zig-zag manner; pulling the zig-zag folded portion together to form a frill; and welding ends of the closure tape projecting beyond sides of the flattened filling side to each other to thereby secure the frill against springing open.