Method and device for joining a sealing foil with a web of material
AssigneeSchober GmbH Werkzeug- und Maschinenbau
InventorKlaus Wittmaier
Life of this patent
Estimating the term…
Abstract
A method and a device for joining a sealing foil to a web of material, the sealing foil is brought to the web of material, and the web of material, together with the sealing foil, is moved along the surface of a support body. The sealing foil is connected in a simple manner with the web of material in that the web of material, along with the sealing foil, is passed between an ultrasonic unit and the surface of the support body, and that ultrasonic energy is introduced into the web of material and/or the sealing foil by means of the ultrasonic unit for connecting the sealing foil with the web of material.
Claims16
A device for joining a sealing foil to a web of material, comprising:
- a rotating cylindrical support body defining a cylindrical smooth surface;
- and
- an ultrasonic unit having a sonotrode tip, the shape of which is concave and matches the shape of said cylindrical surface such that the tip surface is smooth and defines an axis coaxial with the axis of said support body, wherein said support body and said ultrasonic unit define a sealing gap for passage of the sealing foil and web of material, and wherein the sealing foil and web of material are brought together in said sealing gap during their passage therethrough and rest against said surface, wherein the height defined by said sealing gap along the width and circumference of said sealing gap is constant.
Dependencies are inferred from the claim text.