Method and apparatus for improved ultrasonic formation
AssigneeSoni-Form LLC
InventorsGerald Rocha, Nicholas G. Lehoullier
Life of this patent
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Abstract
Aspects disclosed herein relate to improvements regarding the formation of touch fasteners on nonwoven materials or other thermoplastic and non-thermoplastic materials employing ultrasonic formation technologies. Such improvements may be applied to rotary sonotrodes or blade sonotrodes. These improvements may include raised or recessed features in the functional surface of the sonotrode, methods and arrangements of pre-heating and/or cooling the functional surface of the sonotrode, varying or fixing the surface speed of the rotary sonotrode relative to a molding roller to form touch fasteners at desired spacing intervals, and the inclusion of supplementary material with the substrate. Various molding rollers are also disclosed.
Claims26
A system for ultrasonically forming touch fasteners, the system comprising:
- a sonotrode having a functional surface;
- and
- a molding roller having a plurality of fastener cavities;
- wherein the sonotrode has a plurality of raised and/or recessed features disposed on the functional surface of the sonotrode, and wherein the plurality of raised and/or recessed features are configured to apply ultrasonic vibrations to a substrate that is to be disposed between the functional surface and the molding roller to progressively form touch fasteners from the substrate.
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8-14. (canceled)
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A system for ultrasonically forming touch fasteners, the system comprising:
- a rotary sonotrode having a functional surface;
- and
- a molding roller having a plurality of fastener cavities;
- wherein the functional surface of the rotary sonotrode is configured to apply ultrasonic vibrations to a substrate that is to be disposed between the functional surface and the molding roller to form touch fasteners from the substrate, wherein the rotary sonotrode has one or more raised and/or recessed features disposed on the functional surface, and wherein the rotary sonotrode and the molding roller are driven in a varied ratio.
32-52. (canceled)
Dependencies are inferred from the claim text.