초록 ▼

A vertical bag forming, filling and sealing machine having a feed system for a wrapping material forming the flexible tube bags, a filling tube, a longitudinal seam welding device and a cross seam welding device is described. The cross seam welding device comprises a unit forming the lower cross wel

A vertical bag forming, filling and sealing machine having a feed system for a wrapping material forming the flexible tube bags, a filling tube, a longitudinal seam welding device and a cross seam welding device is described. The cross seam welding device comprises a unit forming the lower cross weld seam and a unit forming the upper cross weld seam of a flexible tube bag. The unit for generating the upper cross weld seam or a folding device and a lifting device for the filled flexible tube bag are movable up and down and are lifted for the generation of the upper cross weld seam or for the folding of the flexible tube bag in order to relax the wrapping material. By this the air space over the surface of the filling material is kept as small as possible.

대표청구항 ▼

[ We claim:] [1.] A vertical bag forming, filling and sealing machine comprising:a feed system for a wrapping web forming the flexible tube bags;a filling tube around which the wrapping web is fed for the formation of a flexible tube and which serves for filling a material which is to be packed into

[ We claim:] [1.] A vertical bag forming, filling and sealing machine comprising:a feed system for a wrapping web forming the flexible tube bags;a filling tube around which the wrapping web is fed for the formation of a flexible tube and which serves for filling a material which is to be packed into the tube;a longitudinal seam welding device for welding said web into said tube;a cross seam welding device for the formation of a lower and an upper cross weld seams on said tube, thereby forming bags therebetween,said cross seam welding device being divided into two separate independently operable units including a first unit for producing the lower cross weld seam of and a second unit producing the upper cross weld seam of anda lifting device is provided for the lifting each filled bag before it is provided with the upper cross weld seam;the unit for producing the upper cross weld seam is movable up and down; andthe lifting device and the second unit for producing the upper cross weld seam are driven, and controlled in such a manner that the second unit and the filled bag are lifted relative to the first unit and the filling tube.