Powder metallurgy processes – Forming articles by uniting randomly associated metal particles – Consolidation of powders
Patent
1993-12-09
1995-02-28
Walsh, Donald P.
Powder metallurgy processes
Forming articles by uniting randomly associated metal particles
Consolidation of powders
419 65, 419 36, 419 38, 164246, B22F 500, B22C 702
Patent
active
053934865
ABSTRACT:
A method of making an orthodontic appliance such as a bracket includes the step of forming a preform of molding material while a portion of the molding material is in contact with a textured portion of a web. The web is subsequently degraded by a thermal or solvent degrading process to leave a witness impression on the underside of the preform. The web optionally serves as a conveyor to move the preform from one processing area to another, and optionally has the appearance of a woven material such that the resulting appliance resembles a mesh base appliance having undercut regions.
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Supreme.TM. Mini-Twin brochure, Ortho Organizers, Inc., copyright date unknown.
Eckert Robert P.
Georgakis Evangelos G.
Christoff James D.
Greaves John N.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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