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Mesh sheet with microscopic projections and holes

  • US 5,348,788 A
  • Filed: 01/30/1991
  • Issued: 09/20/1994
  • Est. Priority Date: 01/30/1991
  • Status: Expired due to Fees
First Claim
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1. A non-woven porous mesh in sheet form, said mesh comprising:

  • a continuous sheet having a substantially uniform thickness between opposite sides;

    a series of openings extending through and from one to the other side of the sheet, said openings being distributed in a substantially uniform pattern throughout a two-dimensional area of the sheet; and

    a series of raised protrusions extending substantially normal to and outwardly away from one side of said sheet, wherein the protrusions are of substantially uniform height and are distributed in a substantially uniform pattern corresponding to said pattern of openings but offset therefrom forming a topographical surface wherein said openings have an effective diameter of about 25 to 1000 μ

    m, said openings have essentially the same effective diameter of said protrusions and are respectively centered within a rectangle defined by four adjacent protrusions within the body of said mesh.

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