Plastic article or earthenware shaping or treating: apparatus – Pattern control of travel for a forming means
Reexamination Certificate
2005-05-06
2010-12-07
Ewald, Maria Veronica D (Department: 1791)
Plastic article or earthenware shaping or treating: apparatus
Pattern control of travel for a forming means
C425S089000, C425S174400, C425S374000, C264S316000, C264S308000, C264S497000, C264S401000
Reexamination Certificate
active
07845930
ABSTRACT:
The invention relates to a process or a device for the production of a three-dimensional object by layer-wise solidification of a photo-polymerizable resin by means of a planar or essentially planar construction/reference plane, at which the photo-polymerizable resin contained in the liquid material is to be hardened by electromagnetic irradiation, and wherein the material application for the subsequent layer automatically results from the separation of the last hardened layer from the construction/-reference plane, whereby the construction/reference plane is formed by an elastic film. The film is fixed in a frame, and the height position of the frame with the film is adjusted in a basin containing the liquid material such that the pressure of the liquid material compensates the sagging of the film (formation of a negative meniscus), and that the lower side of the film is permanently in contact with the material during the whole construction process.
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El-Siblani Ali
John Hendrik
Shkolnik Alexandr
D Ewald Maria Veronica
Envisiontec GmbH
Hansen IP Law PLLC
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