Patent ID: 9073654
Filing Date: 2015-07-07
Classification: B65B

Abstract:
1. A packaging machine for forming a vacuum package, said packaging machine comprising: a first evacuable chamber for accommodating therein a product-accommodating section of a package; a second evacuable chamber for accommodating therein an opening section of the package; a partition disposed between the first and second chambers; a first pressure gauge for measuring a first pressure in the first chamber; a second pressure gauge for measuring a second pressure in the second chamber; and a supply air valve for supplying air to the first chamber, wherein the supply air valve is a control valve adapted to be controlled in dependence upon a target pressure difference, the target pressure difference being one of a first desired pressure difference, or a second desired pressure difference, wherein the first desired pressure difference is between the first pressure and second pressure, and the second desired pressure difference is one of (a) a difference between the first pressure and a first predetermined target final pressure for the first chamber, or (b) a difference between the second pressure and a second predetermined target final pressure of the second chamber; wherein an opening of the supply air valve leading into the first chamber is arranged in a wall of the first chamber located opposite the partition; wherein the first chamber and the second chamber fluidly communicate through a gap provided in the partition; and wherein a common horizontal plane passes through both the opening of the supply air valve leading into the first chamber and the gap.