Methods and apparatus for application of nested zero waste ear to traveling web
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United States of America Patent
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May 8, 2012
Grant Date -
Oct 14, 2010
app pub date -
Apr 5, 2010
filing date -
Apr 6, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention provides a process wherein a rotary knife or die, with one or more cutting edges, turns against and in coordination with a corresponding cylinder to create preferably trapezoidal ears. Ear material is slit into two lanes, one for a left side of a diaper and the other for a right side of a diaper. Fastening tapes are applied to both the right and the left ear webs. The ear material is then die cut with a nested pattern on a synchronized vacuum anvil. The resulting discrete ear pieces however, due to the trapezoidal pattern of the ears, alternate between a correct orientation and an incorrect (reversed) orientation. The reversed ear is required to be rotated 180° into the correct orientation such that the ears and associated tape present a left ear and a right ear on the diaper.
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Family
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