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:
Sep. 24, 2013
Filed:
Sep. 23, 2010
Nobuyasu Makino, Shizuoka, JP;
Nobuyasu Makino, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A method for producing powder including supplying a powder material to a fluidized bed container, jetting fluid from each of a plurality of fluid jetting nozzles provided in the fluidized bed container to collide against each other, thereby fluidizing and pulverizing the powder material in the fluidized bed container to form powder, classifying the powder using a centrifugal classification rotor provided at the upper part of the fluidized bed container and discharging the classified powder from an outlet by being guided by the centrifugal classification rotor, wherein the centrifugal classification rotor is rotated at a first rotating speed for a predetermined time from the beginning of the flow of the powder material in the fluidized bed container, and at a second rotating speed after the predetermined time has passed, and the centrifugal classification rotor is controlled so that the first rotating speed is higher than the second rotating speed.