Machine for making and positioning bags made of hot-melt plastic material

Machine for making and positioning bags made of hot melting plastic material, meant to be filled with products having a substantially prismatic shape, comprising a frame which supports in succession:

• a means for the feeding and intermittent advancement, in a preset direction, of a band of hot-melt plastic material which is folded onto itself along a longitudinal folding line, with superimposed flaps and so that a lower flap protrudes laterally with respect to an upper flap;
• a means for creating a bellows-like recess along the folding line;
• a means for the simultaneous fusing and cutting of the band along a transverse direction in longitudinally spaced positions, so as to form a series of adjacent bags which have one side open on the opposite end with respect to the folding line;
• a substantially horizontal movable conveyance surface, provided with a negative-pressure means in a downward region for separating the bags and transferring them sequentially toward a product filling unit which is provided with a clamp for gripping one product at a time with a lower resting surface which is inclined with respect to the horizontal;
• a means for injecting compressed air into each individual bag through its open side to inflate it prior to filling;
• a means for securing each bag along the edge of the protruding flap during inflation;
• wherein said securing means is able to oscillate about a substantially horizontal axis, which is at right angles to a product advancement direction, between a substantially horizontal position and an inclined position which is substantially parallel to the lower resting surface of said gripping clamp, so as to arrange the inflated bag at the same angle as the product.