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Absorbent product for personal use

  • US 5,072,687 A
  • Filed: 08/13/1990
  • Issued: 12/17/1991
  • Est. Priority Date: 11/16/1988
  • Status: Expired due to Term
First Claim
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1. Apparatus for depositing particulate material on a moving substrate, in at least two different concentrations in discreet portions of said substrate, said apparatus comprising, in combination,a horizontal conveyor for supporting the substrate and conveying the substrate at a substantially constant rate of speed,a material hopper for holding the particulate material, said hopper being positioned above said conveyor,means defining a discharge opening in the lower end of said hopper,dosing means positioned in the hopper discharge opening, said dosing means comprising an outer, discontinuous, cylindrical surface and opposed end plates which, together, abut said means defining said discharge opening, thereby preventing the passage of particulate material between said means defining the discharge opening, on the one hand, and the cylindrical surface and the end plates on the other hand,drive means for rotating said cylindrical surface of said dosing means about a horizontal axis at a substantially constant rate of rotation, said horizontal axis being positioned relative to said discharge opening so that, at any given angle of rotation of the cylindrical surface, a portion of the cylindrical surface is inside said material hopper and the remaining portion of the cylindrical surface is not inside said material hopper,means defining a first set of dosing depressions in a first portion of said outer cylindrical surface, said first set of dosing depressions having a given volume per unit of cylindrical surface area andmeans defining a second set of dosing depressions in a second portion of said cylindrical surface, said second set of dosing depressions having a volume per unit of cylindrical surface area which is less than the given volume per unit of cylindrical surface area and greater than zero,so that, when the cylindrical surface is rotated at a constant rate, particulate material is withdrawn from the hopper and deposited on different portions of the substrate in at least two different concentrations every time the cylindrical surface revolves.

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