Preformed bag feeder for packaging machines

摘要

Preformed bag feeder for packaging machines which comprises buckets containing the preformed bags and first means for picking up successive bags from the buckets and for supplying the bags, one by one, to fastening clamps located at a point of the trajectory of the transporter, the clamps allowing pick-up of the successive bags, in a vertical orientation, by the transporter. The transporter comprises, following the fastening clamps, a positioner that carries out the horizontal and vertical alignment of the successive bags with respect to horizontal and vertical reference lines; arranging the bags in a fixed position wherein the lower extremity of the successive bags matches the horizontal reference line and the aforementioned bags are centered with respect to the vertical reference line.

主权项

1. A preformed bag feeder for supplying successive preformed bags having a lower extremity and an upper extremity to a packaging machine having a transporter that moves the preformed bags horizontally along a trajectory in a vertical orientation through successive opening, filling, closing and sealing stations; said feeder comprising:
a plurality of buckets containing the preformed bags; at least one fastening clamp for holding a preformed bag in a vertical orientation, located at a point aligned with the trajectory of the bags through the transporter; first means for picking up a preformed bag from one of the plurality of buckets and supplying the preformed bag to the at least one fastening clamp; a positioner movable between the at least one fastening clamp and the transporter for aligning the preformed bags with respect to horizontal and vertical reference lines, arranging them in a fixed position, the positioner comprising:
a longitudinal passage arranged in the trajectory of the bags through the transporter, the passage being open on top;a horizontal surface closing a bottom of the longitudinal passage for supporting the preformed bags when the bags are inside the longitudinal passage; said horizontal surface defining the horizontal reference line; andat least two lateral centering elements movable between an opening position outside the trajectory of the bags through the transporter, and a closing position wherein said centering elements center preformed bags located inside the positioner with respect to a vertical reference line; such that the lower extremity of the preformed bags matches said horizontal reference line and the preformed bags are centered with respect to said vertical reference line.