Machine and method for making absorbent sanitary articles
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United States of America Patent
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Aug 25, 2020
Grant Date -
Feb 25, 2016
app pub date -
Apr 8, 2014
filing date -
Apr 17, 2013
priority date (Note) -
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Abstract
A machine for making absorbent sanitary articles including an absorbent pad with at least one discrete layer of superabsorbent polymer material includes a unit for forming and applying a succession of absorbent pads, which includes a drum for forming the pad, a duct for feeding a charge of superabsorbent polymer material to the drum and intermittent valve mounted along a stretch of the duct and driven by an actuator. A device detects the superabsorbent polymer material and sends a signal to a control and drive unit connected to the device indicating that the superabsorbent polymer material has been detected. The control and drive unit is configured to drive the actuator to bring the valve into phase with the rotation of the drum when the deviation of the signal from a reference signal exceeds a defined threshold value.
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