Device for the displacement of filling material and the shaping of a material web in a packing machine

Claim 1

In a machine for forming, filling and sealing packages including movable mould means for forming a series of interconnected U-shaped sections transversely in a first longitudinal web of flexible packaging material, means for forming spaced cuts along the side edges of a second longitudinal web of packaging material to form successive edge flaps along the edges of the second web, means for successively sealing transverse pairs of said edge flaps to the side edges of each U-shaped section to form a series of interconnected cavities, a filling tube extending parallel to the tops of the U-shaped sections and beneath the center longitudinal section of the second web for filling said cavities with a filling material, said center longitudinal section of the second web being outwardly bulged to accommodate said filling tube, reciprocating means for sealing the second web transversely to the transverse outer edges of the filled U-shaped sections of the first web to form sealed packages and means for separating each of the interconnected packages, the improvement comprising pressing means disposed substantially between the end of of the tube and the second mentioned reciprocating sealing means and including a reciprocatable mat-like element movable in the direction of the moving webs, means for guiding said mat-like element angularly toward the upper outer surface of the second web and then parallel to the tops of the U-shaped sections to press the second web against the outer transverse edges of the successive U-shaped sections to flatten the bulging center longitudinal section of the second web and to displace the filling material from between the webs in the areas to be sealed and thus maintain said mat-like element against the second web until the areas are sealed by said second mentioned reciprocating sealing means.