Patent ID: 8955291
Filing Date: 2015-02-17
Classification: B29C,B65B

Abstract:
1. A packaging machine comprising a sealing device for welding plastic films, the sealing device having a sealing-tool upper part and a sealing-tool lower part that produce a sealing surface defining a sealing plane by welding the plastic films, wherein one of the sealing-tool upper part and the sealing-tool lower part is selectively heatable to a desired temperature, and wherein at least the sealing-tool upper part or the sealing-tool lower part is excitable to a vibration in a plane approximately parallel to the sealing surface, and wherein the vibration is at a frequency in a range from 5 Hz to 500 Hz for one of forcing out at least some of a product residue in the sealing surface, and reducing the viscosity of a melted portion of the plastic films at the sealing surface through vibrational excitation, and wherein one of the sealing-tool upper part and the sealing-tool lower part is selectively heated to heat-weld the plastic films simultaneously with at least the sealing-tool upper part or the sealing-tool lower part being vibrated.