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Method of making a coated porous metal panel

  • US 5,195,243 A
  • Filed: 02/28/1992
  • Issued: 03/23/1993
  • Est. Priority Date: 02/28/1992
  • Status: Expired due to Term
First Claim
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1. A method of making a coated porous metal panel comprising the steps of:

  • forming a metal panel having a first outer surface on one side of said panel and a second outer surface on the other side of said panel,forming a plurality of discharge pores in said first outer surface of said panel arrayed in a first pattern,forming a plurality of inlet pores in said second outer surface of said panel arrayed in a second pattern laterally offset from said first pattern so that each of said discharge pores is laterally offset from each of said inlet pores,forming an internal chamber in said panel communicating with each of said inlet pores and said discharge pores,forming a plurality of extraction passages in said panel extending between said internal chamber and said second outer surface and arrayed in said first pattern so that each of said extraction passages is disposed behind a corresponding one of said discharge pores,spraying a coating material substantially perpendicular to said first outer surface to form a coating on said first outer surface,capturing surplus coating material entering each of said discharge pores behind said second outer surface of said panel by conducting said surplus coating material through corresponding ones of said extraction passages whereby deposit of said surplus coating material in said internal chamber and in said inlet and said discharge pores is minimized,forming a shield lamina having a plurality of shield pores therein at least as large as said inlet pores and arrayed in said second pattern, andmechanically attaching said shield lamina to said panel in juxtaposition to said second outer surface thereof with each of said shield pores in register with a corresponding one of said inlet pores so that said inlet pores are open through said shield pores and said extraction passages are blocked by said shield lamina.

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