Sealing system for a packaging machine

Abstract

The following invention relates to a packaging machine with a sealing system comprising a front jaw and a rear jaw which reciprocate between an open-and a sealing-position, respectively, whereas a front jaw comprises two guide shafts which are supported in a frame.

1 . A packaging machine with a sealing system comprising:
 a front jaw and a rear jaw, which reciprocate between an open- and a sealing-position, respectively,
 whereas the front jaw comprises:
 two guide shafts which are supported in a frame, 
 
 wherein the rear jaw is supported on the guide shafts of the front jaw; 
   a sonotrode for sealing the film material with ultrasonic sound;   wherein a motor drives the jaws and provides the pressure needed for the sealing with ultrasonic sound; and   wherein the front jaw and the rear jaw comprise heating- and cooling means.   
     
     
         2 . The packaging machine according to  claim 1 , wherein each of the two guide shafts comprises two bearings, respectively and that the two bearings are situated in a frame which is made from one single piece. 
     
     
         3 . The packaging machine according to  claim 1 , wherein a bearing of the guide shaft is located between the front jaw and the rear jaw. 
     
     
         4 . The packaging machine according to  claim 1 , wherein the front jaw is coupled to a beam and the rear jaw is connected to a beam and that each beam is supported at the frame by a linear guiding means respectively. 
     
     
         5 . (canceled) 
     
     
         6 . The packaging machine according to  claim 1 , wherein the bearings are free from play. 
     
     
         7 . The packaging machine according to  claim 1 , wherein the front jaw and the rear jaw are driven by a servo motor. 
     
     
         8 . The packaging machine according to  claim 1 , wherein the frame is made from two pieces which are connected by two side plates. 
     
     
         9 . The packaging machine according to  claim 8 , wherein the two pieces of the frame and/or the side plates are connected by dowel pins. 
     
     
         10 . (canceled) 
     
     
         11 . The packaging machine according to  claim 1 , wherein each of the front jaw and the rear jaw comprises two connections with shaft, respectively, whereas one connection of each jaw is an adjustable connection and one connection of each jaw is a fixed connection. 
     
     
         12 . A sealing-jaw of a packaging machine for sealing of a film with ultrasonic sound, wherein the sealing-jaw comprises heating- and/or cooling means that maintain the sealing jaw at a uniform temperature,
 wherein the heating means are electrical heating means and the cooling means is a tube system through which a liquid flows.   
     
     
         13 . The sealing-jaw according to  claim 12 , wherein the sealing-jaw comprises an anvil and that the heating- and/or cooling means are distributed at the front- and at the rear part of the anvil. 
     
     
         14 . Method to seal a packaging with two jaws, wherein at least one jaw is tempered prior to sealing, or with a sonotrode, wherein a sealing period is adjusted based on a temperature of the sonotrode. 
     
     
         15 . (canceled) 
     
     
         16 . The packaging machine according to  claim 2 , wherein a bearing of the guide shaft is located between the front jaw and the rear jaw. 
     
     
         17 . The packaging machine according to  claim 2 , wherein the front jaw is coupled to a beam and the rear jaw is connected to a beam and that each beam is supported at the frame by a linear guiding means respectively. 
     
     
         18 . The packaging machine according to  claim 16 , wherein the front jaw is coupled to a beam and the rear jaw is connected to a beam and that each beam is supported at the frame by a linear guiding means respectively. 
     
     
         19 . The packaging machine according to  claim 2 , wherein the front jaw is coupled to a beam and the rear jaw is connected to a beam and that each beam is supported at the frame by a linear guiding means respectively. 
     
     
         20 . The packaging machine according to  claim 18 , wherein the front jaw is coupled to a beam and the rear jaw is connected to a beam and that each beam is supported at the frame by a linear guiding means respectively. 
     
     
         21 . The packaging machine according to  claim 20 , wherein the bearings are free from play. 
     
     
         22 . The packaging machine according to  claim 21 , wherein the front jaw and the rear jaw are driven by a servo motor. 
     
     
         23 . The packaging machine according to  claim 22 , wherein the frame is made from two pieces which are connected by two side plates.