Patent · US Active

Two-component developer

US8507169B2 · kind B2 · utility

0Cited by

1References

7Claims

0Family size

Assignee

Konica Minolta Business Technologies, Inc. · JP

Inventors

Tomoko Mine · Hino, JP
Mikihiko Sukeno · Ashiya, JP
Tatsuya Nagase · Tokyo, JP
Tomomi Oshiba · Hachioji, JP
Hiroyuki Kozuru · Tokyo, JP
Saburou Hiraoka · Kodaira, JP
Yoshiyasu Matsumoto · Tokyo, JP
Kosuke Nakamura · Kyoto, JP
Hitomi Motani · Tokyo, JP
Takanari Kayamori · Kawasaki, JP

Key dates

Filing date	Feb 28, 2012
Grant date	Aug 13, 2013
Priority date	—
Expiry date	Apr 11, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG03G9/1139
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A two-component developer is disclosed, composing a toner comprising parent toner particles with an attached external additive and a carrier provided with a resin covering layer on a surface of a core particle, wherein the resin covering layer comprises a binder resin comprising an acrylic resin and when the resin covering layer is divided in half to a core particle side and a surface side, a nitrogen element content of the core particle side is larger than a nitrogen element content of the surface side.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.