Patent ID: 6990790
Filing Date: 2006-01-31
Classification: B65B

Abstract:
1. A deaerating apparatus in a bag-filling packaging machine for deaerating a bag before being sealed in a subsequent sealing process, said deaerating apparatus including a pair of press-holding members that press-hold a mouth of a bag from both sides of and up to the upper-end edge of said mouth by flat press-holding surfaces of said press-holding members, said flat press-holding surfaces having a predetermined length in a vertical direction; wherein at least one of said press-holding members is comprised of a main body and a slide element that is fitted inside a cut-out formed at an intermediate position of said main body with respect to a direction of width of said main body and is caused to advance and retract perpendicularly with respect to said press-holding surface in said cut-out; a space which acts as a vacuum passage that communicates at one end thereof with a vacuum source is formed between an upper portion of said slide element and said main body; and a front surface of said slide element forms a part of said press-holding surface of said one of said press-holding members when said slide element advances, thus press-holding the mouth up to the upper-end edge thereof and a groove that has a predetermined depth and reaches from a lower-end edge of said press-holding surface to said vacuum passage is formed along said press-holding surface when said slide element retracts: whereby the mouth of the bag is press-held by said pair of press-holding members with the slide element withdrawn so that air and excess liquid matter inside the bag is sucked out through a vacuum passage communicated with a vacuum source, the air and excess liquid matter is discharged through said vacuum passage, and said slide element is advanced to press-hold the mouth of the bag between the slide element and the press-holding member that faces the slide member thus pushing out the excess liquid matter from the mouth of the bag, and such liquid matter is discharged through said vacuum passage.