The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1993
Filed:
Aug. 31, 1992
Applicant:
Inventors:
Wayne A Vinson, Valencia, CA (US);
Joseph W Allison, Valencia, CA (US);
Paul F Jacobs, La Crescenta, CA (US);
Dennis R Smalley, Baldwin Park, CA (US);
Assignee:
3D Systems, Inc., Valencia, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
264 22 ; 118620 ; 118712 ; 156 54 ; 1562735 ; 1562755 ; 1563071 ; 156378 ; 1563796 ; 2504921 ; 264 401 ; 264308 ; 365106 ; 365107 ; 425135 ; 4251744 ; 427-8 ; 427508 ; 427553 ; 427554 ;
Abstract
A method and apparatus for eliminating or substantially reducing curling effects in stereolithographically formed objects. Synergistic stimulation is applied to a curable material to form a three dimensional object through the build up of successive layers. Curling between successive layers is eliminated or substantially reduced by curing a balancing layer in relation to a balanced layer such that reverse curl of the balanced layer caused by the balancing layer offsets or negates normal curl of the balanced layer caused by the balancing layer.