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Slide die coating method and apparatus with improved die lip

  • US 5,741,549 A
  • Filed: 10/03/1996
  • Issued: 04/21/1998
  • Est. Priority Date: 04/29/1994
  • Status: Expired due to Term
First Claim
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1. A method of die coating at least one coating fluid onto a surface comprising:

  • sliding a first coating fluid along a slide surface that has a sharp edge, and an upstream land contacting the sharp edge and spaced further from the surface than the sharp edge to form a continuous coating bead between the sharp edge and the surface being coated; and

    sliding the first coating fluid onto the surface without any coating fluid traveling between the sharp edge and the land, wherein the surface being coated has a shape, wherein the land has a shape which conforms to the shape of the surface being coated, and wherein the bead does not substantially move into a space between the land and the surface to be coated even when vacuum is applied and increased.

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