Device and Method for Compressing Packaging Sleeves

A device for compressing packaging sleeves, comprising:

• at least two movably supported pressure bars for compressing the packaging sleeve, and
• at least one drive for moving the pressure bars,
• wherein the pressure bars are supported in such a way that between the pressure bars a gap is created, a longitudinal direction of which corresponds to a transport direction of the packaging sleeve,
• wherein the extension of the pressure bars in the longitudinal direction of the gap is greater than their extension in a transversal or vertical direction,
• wherein the pressure bars are supported in such a way that the distance between the pressure bars is variable, and
• wherein the pressure bars are supported in such a way that the pressure bars are movable in the longitudinal direction of the gap,
• wherein the pressure bars are supported in such a way that the pressure bars are movable along a non-circular closed curve.

A method for compressing packaging sleeves comprising multiple layers of different material, the method comprising:

• a) providing a device for compressing packaging sleeves with at least two movably supported pressure bars for compressing the packaging sleeve and with at least one drive for moving the pressure bars;
• b) varying the distance between the pressure bars;
• and
• c) moving the pressure bars in a longitudinal direction of a gap between the pressure bars,
• wherein the steps b) and c) are performed by moving the pressure bars along a non-circular closed curve.