Dual bonder
AssigneeCurt G. Joa, Inc.
InventorsDavid Edward Schuette, Joram L. McClurg, Jon Allen Pelland, Jeffrey W. Fritz, Daniel A. Peterson
Life of this patent
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Abstract
A system and method for producing a disposable undergarment, with the lateral edges of the undergarment bonded by means of an ultrasonic horn. When a blank is formed for an individual undergarment, the lateral edges of opposing edges of the blank will form the seam. When the edges are sealed together, a seam is formed. The individual undergarments may be later separated along the seams.
Claims18
A bonding system for bonding a web comprising at least a pair of web layers, the bonding system comprising:
- a first ultrasonic horn;
- and
- a first anvil spaced apart from the first ultrasonic horn by a gap so as to allow for translation of the web therethrough in a machine direction, the first anvil comprising a pair of seal surfaces extending in a cross-machine direction that is orthogonal to the machine direction and being spaced apart in the machine direction so as to have a recess therebetween;
- wherein each of the pair of seal surfaces comprises canted teeth formed thereon, the canted teeth angled so as to provide both trailing edge and leading edge coverage in the cross-machine direction;
- and
- wherein the first ultrasonic horn operates with the first anvil to ultrasonically bond the plurality of web layers together at a plurality of bond points corresponding to the canted teeth, as the web moves through the gap.
A method for bonding a continuous web comprising a plurality of web layers, the method comprising:
- providing a continuous web moving in a machine direction at a moving velocity;
- providing an anvil and ultrasonic horn along a path of the continuous web, wherein the anvil and ultrasonic horn are positioned on opposite sides of the continuous web and are spaced apart to provide a gap through which the continuous web passes;
- and
- ultrasonically bonding the plurality of web layers together at a plurality of bond points, via the ultrasonic horn functioning with the anvil, as the continuous web moves through the gap;
- wherein ultrasonically bonding the plurality of web layers together at the plurality of bond points comprises bonding the plurality of web layers together via a pair of seal surfaces on the anvil that extend in a cross-machine direction that is orthogonal to the machine direction and that are spaced apart from one another in the machine direction so as to have a recess therebetween, with each of the pair of seal surfaces comprising a row of canted teeth formed thereon angled so as to provide both trailing edge and leading edge coverage in the cross-machine direction, and with the plurality of bond points corresponding to locations of the canted teeth.
Dependencies are inferred from the claim text.