Patent ID: 7866131

Claim:
A vertical bagging machine ( 1 ) comprising a film web ( 4 ) drawn off from a supply roll ( 2 ) by means of a draw-off ( 3 ), a forming shoulder ( 5 ) for forming the film web ( 4 ) into a tubular film ( 6 ), a format tube ( 7 ) for receiving and filling the tubular film ( 6 ), a longitudinal seal unit ( 8 ) for welding the longitudinal edges of the film web ( 4 ) and for generating a longitudinal seam ( 9 ) of the tubular film ( 6 ), a transversal seal unit ( 10 ) comprising two hot-seal jaws ( 11 , 12 ) displaceable against one another for generating transversal seams ( 13 ) at the tubular film ( 6 ), a cutting unit ( 14 ) for cutting off the generated tubular bags ( 15 ) from the tubular film ( 6 ), a mechanism ( 16 ) for holding the hot-seal jaws ( 11 , 12 ), and a drive ( 17 ) for displacing the transversal seal unit ( 10 ), wherein the drive ( 17 ) comprises two linear motors ( 18 , 19 ), the first linear motor ( 18 ) of which is provided for a displacement of the transversal seal unit ( 10 ) in a first direction, preferably vertically ( 20 ), and the second linear motor ( 19 ) serves for carrying out a displacement in a second direction, preferably horizontally ( 21 ), to displace a hot-seal jaw ( 11 ) in this direction, preferably to cause both hot-seal jaws ( 11 , 12 ) to be displaced against one another by means of a gear ( 22 ), wherein the linear motors ( 18 , 19 ) are interconnected by means of a connection, and each linear motor ( 18 , 19 ) consists of a primary part ( 24 , 26 ) and a secondary part ( 25 , 27 ), characterized in that the connection is a cross formation ( 23 ), the two beams ( 28 , 29 ) of which are arranged transversal to one another, that on each of the opposite sides of the cross formation ( 23 ), always one part ( 24 , 25 , 26 , 27 ), respectively, of a different linear motor ( 18 , 19 ) is attached on a different beam ( 28 , 29 ), that on each of the opposite sides, one guideway ( 30 , 31 ), respectively, is provided in parallel to a beam ( 28 , 29 ), that one part ( 24 , 25 , 26 , 27 ) of a linear motor ( 18 , 19 ) is attached to a stationary holder ( 32 ), and its other part ( 24 , 25 , 26 , 27 ) is attached to the one side of the cross formation ( 23 ), that one part ( 24 , 25 , 26 , 27 ) of the other linear motor ( 18 , 19 ) is attached on the other side of the cross formation ( 23 ), and its other part ( 24 , 25 , 26 , 27 ) is displaceable relative to this part ( 24 , 25 , 26 , 27 ) and is connected with the transversal seal unit ( 10 ), and that on each of the parts ( 24 , 25 , 26 , 27 ) which are not attached to the cross formation ( 23 ), at least one cart ( 33 ), respectively, is provided for displacing the part ( 24 , 25 , 26 , 27 ) along a guideway ( 30 , 31 ).