04938816 is referenced by 206 patents and cites 21 patents.

A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer controlling a laser to direct the laser energy onto the powder to produce a sintered mass. The computer either determines or is programmed with the boundaries of the desired cross-sectional regions of the part. For each cross-section, the aim of the laser beam is scanned over a layer of powder and the beam is switched on to sinter only the powder within the boundaries of the cross-section. Powder is applied and successive layers sintered until a completed part is formed. Preferably, the powder is deposited to the target area of the laser and attains high bulk density during sintering.

Title
Selective laser sintering with assisted powder handling
Application Number
920580
Publication Number
4938816
Application Date
September 5, 1989
Publication Date
July 3, 1990
Inventor
Carl R Deckard
Austin
TX, US
Joseph J Beaman
Austin
TX, US
Agent
Vinson & Elkins
Assignee
Board of Regents The University of Texas System
TX, US
IPC
B29C 67/00
B23K 9/00
B32B 31/00
B27N 3/00
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