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Apparatus for multiple beam laser sintering

  • US 5,508,489 A
  • Filed: 08/17/1994
  • Issued: 04/16/1996
  • Est. Priority Date: 10/20/1993
  • Status: Expired due to Term
First Claim
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1. An apparatus for laser sintering, comprising:

  • laser beam means for providing a sintering laser beam incident on a surface of a powder at a sintering location and for providing at least one defocussed laser beam incident on a defocussed region near said sintering location; and

    said defocussed beam providing a predetermined temperature gradient between said sintering location and the powder surrounding said sintering location.

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