1. http://www.custompartnet.com/wu/laminated-object-manufacturing
The first commercial Laminated Object Manufacturing (LOM) system was shipped in 1991.
LOM was developed by Helisys of Torrance, CA. The main components of the system are a feed
mechanism that advances a sheet over a build platform, a heated roller to apply pressure to bond
the sheet to the layer below, and a laser to cut the outline of the part in each sheet layer. Parts are
produced by stacking, bonding, and cutting layers of adhesive-coated sheet material on top of the
previous one. A laser cuts the outline of the part into each layer. After each cut is completed, the
platform lowers by a depth equal to the sheet thickness (typically 0.002-0.020 in), and another
sheet is advanced on top of the previously deposited layers. The platform then rises slightly and
the heated roller applies pressure to bond the new layer. The laser cuts the outline and the
process is repeated until the part is completed. After a layer is cut, the extra material remains in
place to support the part during build.