Method and apparatus for welding polymer fabrics
OwnerMichael John Radley Younginventor
Life of this patent
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Abstract
The apparatus is adapted to weld ultrasonically two or more layers of fabric. The fabrics may be a woven or non-woven fabric of nylon, polyethylene or other polymeric material. The apparatus includes first and second opposed ultrasonically vibratable horns so spaced from one another that the layers of fabric may be passed between them. At least one, and optionally both, of the first and second horns is vibratable in an axial mode.
Claims12
An apparatus for welding ultrasonically two or more layers of fabric comprising:
- first and second opposed ultrasonically vibratable horns configured to be spaced from one another so that the two or more layers of fabric may be passed between the first and second horns, wherein the first and second horns are both vibratable in an axial mode at frequencies which are so variable that the first horn is vibratable at a frequency between 1 and 20% greater than the frequency at which the second horn is vibratable.
An apparatus for welding ultrasonically two or more layers of fabric comprising:
- first and second opposed ultrasonically vibratable horns spaced from one another so that the two or more layers of fabric may be passed between the first and second horns, wherein the first horn is vibratable in an axial mode and the second horn is vibratable in a tornsional mode.
A method of welding ultrasonically two or more layers of fabric, the method comprising the steps of:
- providing first and second opposed ultrasonically vibratable horns spaced from one another;
- and
- passing the layers of fabric between the first horn and the second horn while ultrasonically vibrating the first horn in an axial mode and the second horn in a tornsional mode.
Dependencies are inferred from the claim text.