Method of and apparatus for production of three-dimensional obje

Details Method of and apparatus for production of three-dimensional obje Method of and apparatus for production of three-dimensional obje

1989-04-17

1992-04-14

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

118432, 118429, 118620, 118712, 156 64, 1562735, 1562755, 156378, 1563796, 250432R, 2504921, 264 401, 264308, 364476, 364522, 365106, 365107, 425135, 4251744, 427 8, 427541430.1, B29C 3508, B29C 4102

Patent

active

051045923

ABSTRACT:
An improved sterolithography system for generating a three-dimensional object from object defining information, the information defining the object being structurally specified to reduce curl, stress and distortion in the ultimately formed object is described. A stereolithographic distortion known as curl is reduced by the system, and several techniques to eliminate or reduce curl are utilized by the system, including dashed line, bent line, secondary structure, rivets, and multi-pass techniques.

REFERENCES:
patent: 2775758 (1956-12-01), Munz
patent: 4575330 (1986-03-01), Hull
patent: 4945032 (1990-07-01), Murphy et al.

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