B - Operations – Transporting – 27 – N
Patent
B - Operations, Transporting
27
N
B27N 3/00 (2006.01) A61F 13/15 (2006.01) D01G 11/00 (2006.01) D01G 13/00 (2006.01)
Patent
CA 2124911
An apparatus and method for making absorbent products in which a first material, such as absorbent fluff formed from wood pulp, is introduced into a vacuum forming chamber. A portion of the fluff is deposited into the cavity of a mold transported through the forming chamber by a forming wheel so as to form a layer of pure fluff within the bottom of the mold cavity. A second material, such as superabsorbent particles or heat stabilized fibers, is introduced into the forming chamber so that streams of the first and second materials collide within a mixing zone. As the mold continues it travel through the forming chamber, a mixture of first and second materials from the mixing zone is deposited within the mold cavity, thereby filling it. The portion of the mixture that extends above the surface of the mold is scraped off by a scarfing brush that directs the mixture back into the mixing zone, thereby creating turbulence that ensures thorough mixing of the two materials. The result is an absorbent product having a first layer formed by pure first material and a second layer formed by a mixture of the first and second materials.
Griffoul Thomas
Wislinski Martin
Mcneil-Ppc Inc.
Smart & Biggar
LandOfFree
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