The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2014
Filed:
Mar. 08, 2010
Gabriele Pastrello, Milan, IT;
Aldo Fusarpoli, Offanengo, IT;
Matteo Piantoni, Albino, IT;
Goeran Forsbring, Kungsbacka, SE;
Robert Perneborn, Goeteborg, SE;
Gabriele Pastrello, Milan, IT;
Aldo Fusarpoli, Offanengo, IT;
Matteo Piantoni, Albino, IT;
Goeran Forsbring, Kungsbacka, SE;
Robert Perneborn, Goeteborg, SE;
GDM S.p.A., , IT;
Abstract
Absorbent nappy/diaper pads composed of a first absorbent base material, and a second absorbent material consisting of superabsorbent polymer powders, are made by a unit () that comprises a conveyor () carrying the first absorbent material along a predetermined feed path (P), and a feed system () by which the superabsorbent polymer powders are released onto the feed path (P); the feed system () comprises a fixed duct () with an outlet () directed at the feed path (P), and a valve (), positioned along an intermediate segment of the duct (), by which the superabsorbent polymer powders are dispensed intermittently and controllably. The valve () comprises a rotating disc (), set transversely to the duct (), with an annular region () that revolves through a gap () in the duct () and presents at least one slot () delimited longitudinally, in the direction of rotation of the disc (), by a leading edge () and a trailing edge (); the radial dimension of the slot () increases progressively, at least along a part of the distance from the leading edge () toward the trailing edge ().