Method for producing packaging units in a tubular bag-making machine

Abstract

The invention relates to a method for manufacturing packaging units ( 20 ) in a tubular bag forming, filling and sealing machine, which method contains vertically conveying disk-shaped products ( 11 ), which lie one above the other in portion stacks ( 10 ), and wrapping them with a film web being conveyed parallel to the products by means of a film take-off device, wherein the film web, in order to form a film tube ( 12 ), is provided with a longitudinal sealed seam by means of a longitudinal sealing device and subsequently with transverse sealed seams ( 18 ) above and below the portion stack by means of a transverse sealing device ( 14 ) being driven by a drive device independently of the film take-off device and moving in the same direction as the film web while the sealing device contacts the film web for sealing purposes, the transverse sealing device carrying out a vertical movement relative to the film tube in the direction opposite the conveying direction of the film tube while the sealing device contacts the film tube for sealing purposes.

1 . A method for manufacturing packaging units in a tubular bag forming, filling and sealing machine, said method comprising:
 vertically conveying disk-shaped products lying one above the other in portion stacks;   wrapping the portion sacks with a film web conveyed parallel to the products by a film take-off device;   forming a longitudinal sealed seam in the film web to form a film tube using a longitudinal sealing device, said film tube moving in a conveying direction; and   forming transverse sealed seams in the film tube above and below each portion stack using a transverse sealing device driven by a drive device independently of the film take-off device and moving in the same direction as the film tube while the sealing device contacts the film web to form each transverse sealed seam, wherein the transverse sealing device moves vertically relative to the film tube in a direction opposite the conveying direction of the film tube while the sealing device contacts the film tube to form each transverse sealed seam.   
     
     
         2 . The method according to  claim 1 , in which the relative movement of the transverse sealing device is effected by means of a retardation of the vertical movement of the transverse sealing device. 
     
     
         3 . The method according to  claim 2 , in which the retardation of the vertical movement of the transverse sealing device, in a final phase of the contacting for sealing purposes, is effected subsequently to an at least partially material connection of film web portions that rest against one another. 
     
     
         4 . The method according to  claim 1 , in which the movement distance s that is covered by the relative movement of the transverse sealing device is smaller than the space a between the transverse sealing device and the portion stack of the products being arranged above the transverse sealing device.