Patent ID: 7877966
Filing Date: 2011-02-01
Classification: B65B

Abstract:
1. A machine for forming, filling, and sealing sacks, comprising: an unwinding device for a plastic tube; a cross cutting device that cuts the tube perpendicular to a principal axis of symmetry thereof to create tubular pieces; a bottom forming device for forming a sack bottom at one end of the tubular piece; transportation devices for conveying the resulting sacks through the machine; a filling station with a feed element for filling the sacks with a product; a device to reduce a distance between a product discharge opening of the feed element and the bottom of the sack to be filled, the distance-reducing device including a sack lifting device configured to lift the sack in the filling station such that a top edge of the sack is located above the product discharge opening of the feed element; a device to seal the filled sack; and a control device that (i) is connected to measuring instruments that transfer to the control device information used to determine a filling level of the sack and (ii) regulates the distance between the product discharge opening and the filling level of the sack based on material- and filling-specific target values that minimize mist formation in the product, the discharge opening of the feed element being below the fill level of the product in the sack.