Plastic and nonmetallic article shaping or treating: processes – Disparate treatment of article subsequent to working,... – Effecting temperature change
Reexamination Certificate
2007-10-23
2007-10-23
Tentoni, Leo B. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Disparate treatment of article subsequent to working,...
Effecting temperature change
C264S237000, C264S317000, C264S345000, C264S348000
Reexamination Certificate
active
10815510
ABSTRACT:
A method for removing supports from a three-dimensional objected formed by selective deposition modeling. The three-dimensional object is formed from a curable phase change material and the supports are formed from a non-curable phase change material. The curable phase change material contains between about 5% to about 25% of a non-reactive wax in order to achieve the desired phase change characteristics of the material. When removing the supports with heat, discoloration undesirably occurs in the three-dimensional object as the non-reactive wax migrates within the object. The method prevents wax migration by cooling the object slowly past the freezing point of the build material such that a temperature differential no greater than about 5° C. is present within the object. With the preferred build material having a freezing point of about 49.5° C., this is achieved by lowering the temperature between about 62° C. to about 52° C. over a period of between about 5 to about 10 minutes so that the temperature of the regions of the object remain substantially equal as the freezing point is crossed during cooling.
REFERENCES:
patent: 5136515 (1992-08-01), Helinski
patent: 5141680 (1992-08-01), Almquist et al.
patent: 5252264 (1993-10-01), Forderhase et al.
patent: 5503785 (1996-04-01), Crump et al.
patent: 5555176 (1996-09-01), Menhennett et al.
patent: 5617911 (1997-04-01), Sterett et al.
patent: 5866058 (1999-02-01), Batchelder et al.
patent: 5997795 (1999-12-01), Danforth et al.
patent: 6132665 (2000-10-01), Bui et al.
patent: 6259962 (2001-07-01), Gothait
patent: 6375880 (2002-04-01), Cooper et al.
patent: 6841116 (2005-01-01), Schmidt
patent: 6841589 (2005-01-01), Schmidt et al.
patent: 97/11837 (1997-04-01), None
patent: 01/26023 (2001-04-01), None
Newell Kenneth J.
Ruatta Stephen A.
Stockwell John S.
3-D Systems, Inc.
D'Alessandro Ralph
Pedigo Paul F.
Summa, Allan & Addition, P.A.
Tentoni Leo B.
LandOfFree
Post processing three-dimensional objects formed by... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Post processing three-dimensional objects formed by..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Post processing three-dimensional objects formed by... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3903085