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Apparatus and method for the zoned placement of superabsorbent material

  • US 5,494,622 A
  • Filed: 07/12/1994
  • Issued: 02/27/1996
  • Est. Priority Date: 07/12/1994
  • Status: Expired due to Term
First Claim
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1. An apparatus for forming a composite web having a selected plurality of discrete pocket regions which are distributed on a carrier layer and contain high-absorbency material, said apparatus comprising:

  • a pattern chamber;

    particulate supplying means for providing particles of high-absorbency material into said pattern chamber;

    web supplying means for providing a gas permeable carrier layer;

    foraminous forming means for moving said carrier layer through said pattern chamber, said forming means including a pattern of openings which are formed therethrough and are arranged to provide for a selected pattern of said discrete pocket regions;

    vacuum supplying means for providing a selected level of relatively low gas pressure at an underside region of said forming means to produce a selected gas-flow through said carrier layer and said foraminous forming means to form said pocket regions;

    covering means for providing a layer of liquid-permeable covering material to sandwich said pocket regions of high-absorbency material between said carrier layer and said covering layer.

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