Rotary bonding apparatus and method
AssigneePaper Converting Machine Company
InventorsPaul Ziegelhoffer, Bart Hardy, Michael Jarmuskiewicz, Frank Jocewicz
Life of this patent
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Abstract
A rotary bonding apparatus includes a rotatable drum and one or more bonding elements, for example, ultrasonic horn and anvil assemblies, which rotate with the drum. The drum includes a web-supporting surface, and web material which is to be bonded rotates with the drum. The web material is positioned between the bonding elements and the web and bonding elements rotate at the same velocity so that the bonding elements are stationary relative to the web being bonded.
Claims25
A rotary bonding apparatus comprising:
- a frame,
- a drum rotatably mounted on the frame, the drum having a web-supporting surface and a central axis of rotation, the web surface of the drum being adapted to support web material which is to be bonded,
- a first bonding element mounted on the drum for rotation therewith,
- a second bonding element mounted on the drum for rotation therewith, the bonding elements being radially spaced to provide a gap at the web-supporting surface of the drum for web material which is to be bonded, whereby web material on the web-supporting surface remains substantially stationary relative to the bonding elements as the drum rotates.
A method of ultrasonic bonding a web material comprising the steps of:
- rotating a drum about an axis of rotation, the drum having a web-supporting surface,
- rotating an anvil and an ultrasonic horn with the drum and spacing the anvil and the horn in a radial direction to provide a gap therebetween,
- feeding web material into contact with the web-supporting surface of the rotating drum and into the gap between the anvil and the horn so that the web material rotates with the web-supporting surface and remains substantially stationary relative to the anvil and the horn, and
- applying ultrasonic energy to the web material with the horn.
Dependencies are inferred from the claim text.