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:
Oct. 18, 2011
Filed:
Nov. 02, 2009
Takamichi Matsushita, Tokyo, JP;
Takamichi Matsushita, Tokyo, JP;
Kankyokeieisogokenkyusho Co., Inc., Tokyo, JP;
Abstract
Coarsely shredded paper powder is pulverized using a first vertical roller mill equipped with a plurality of first pulverizing rollersto obtain a fine paper powder having an average particle diameter of 50 μm or greater and less than 150 μm. Then, such a fine paper powder is further pulverized using a second vertical roller mill equipped with a plurality of second pulverizing rollersto obtain a fine paper powder having an average particle diameter of 25 μm or greater and less than 50 μm. Concerning the inclination angle θof grooveswith respect to axes L of rotation of said first and second pulverizing rollers, an angle of inclination θof the first pulverizing rollersis smaller than an angle of inclination θof the second pulverizing rollers. Accordingly, the fine paper powder can be produced without incurring a substantial environmental impact.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile