Patent ID: 8677930
Filing Date: 2014-03-25
Classification: A61F,B05B

Abstract:
1. A unit for making absorbent diaper pads composed of a first absorbent base material, and a second absorbent material including superabsorbent polymer powders, comprising: a conveyor mechanism by which the first absorbent material is directed along a predetermined feed path; a feed mechanism by which the superabsorbent polymer powders are released onto the feed path, comprising a fixed duct with an outlet directed at the path, and a valve mechanism positioned along an intermediate segment of the fixed duct, by which the superabsorbent polymer powders are dispensed intermittently and controllably; the valve mechanism comprising a rotating disc disposed transversely to the fixed duct and including an annular region revolving through a gap in the fixed duct; the annular region of the rotating disc including at least one slot having, along a direction of rotation of the rotating disc, a leading edge and a trailing edge establishing an angular length of the slot; and, a radial dimension of the at least one slot increasing from the leading edge toward the trailing edge, at least along a portion of the angular length; wherein the valve mechanism comprises a length altering mechanism for altering the angular length of the at least one slot for determining a longitudinal dimension of a portion of the absorbent diaper pad onto which the superabsorbent polymer powders are directed by the fixed duct.