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:
Jul. 22, 2025
Filed:
Apr. 23, 2019
Eos Gmbh Electro Optical Systems, Krailling, DE;
Andreas Pfister, Fuerth, DE;
Mandy Gersch, Ulm, DE;
Daniel Froehlich, Graefelfing, DE;
Verena Galitz, Krailling, DE;
Sybille Fischer, Eichenau, DE;
EOS GmbH Electro Optical Systems, Krailling, DE;
Abstract
A method for producing a powder comprising at least one polymer for use in a method for the additive manufacture of a three-dimensional object is described. The method includes the step of mechanically treating the powder in a mixer with at least one rotating mixing blade, wherein the powder is exposed to a temperature Tand Tis at least 30° C. and is below the melting point Tof the polymer (determined according to DIN EN ISO 11357) if the polymer is a semi-crystalline polymer, or wherein Tis at least 30° C. and wherein Tis at most 50° C. above the glass transition temperature Tof the polymer (determined according to DIN EN ISO 11357) if the polymer is a melt-amorphous polymer. Compared to a time before the start of the treatment, it may be achieved that after the treatment, the bulk density of the powder is increased by at least 10% (or in the case of polymer, copolymer or polymer blend of polyamide at least 2% and more) and the BET surface area is decreased by at least 10%, and optionally also the pourability is improved by at least 10%.