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:
Aug. 28, 2018
Filed:
Sep. 20, 2017
Konica Minolta, Inc., Tokyo, JP;
Takanari Kayamori, Kawasaki, JP;
Masaharu Matsubara, Hachioji, JP;
Naoya Tonegawa, Sagamihara, JP;
Kouji Izawa, Tokyo, JP;
Atsushi Iioka, Hachioji, JP;
KONICA MINOLTA, INC., Tokyo, JP;
Abstract
An electrostatic charge image developing white toner according to the present invention includes toner base particles including rutile type titanium oxide particles as colorant and a binder resin. The rutile type titanium oxide particles are composed of two groups Ga and Gb of rutile type titanium oxide particles have different volume particle size distribution. A volume particle size distribution curve of the rutile type titanium oxide particles represents diameter on a horizontal axis and volume ratio on a vertical axis and has two main peaks. Diameters Da and Db of peak top positions of the two main peaks are respectively within a range of 100 to 500 nm, and satisfy following Relational expressions:(Relational expression 1):  25 nm≤≤200 nm(Relational expression 2):  (mass of):(mass of)=5:95 to 30:70.