Title:
ELECTROPHOTOGRAPHIC CARRIER, TWO-COMPONENT DEVELOPER AND IMAGE FORMING METHOD
Document Type and Number:
Japanese Patent JP3029180
Kind Code:
B2
Abstract:
PURPOSE: To provide a carrier capable of giving a high quality image having high image quality, high definition and high image density over a long period of time, hardly lowering image density or causing blurring even when a color original having a large image area is continuously copied, ensuring rapid start up of triboelectric charge between a toner and the carrier and having low dependency of triboelectric charge on the environment.
CONSTITUTION: This electrophotographic carrier has 15-45μm 50% average particle diameter (D50) and contains 1-20% carrier particles having ≤22μm, ≤3% carrier particles having ≤16μm, 2-15% carrier particles having ≥62μm and ≤2% carrier particles having ≥88pm. The specific surface area S1 of this carrier measured by an air permeation method and the specific surface area S2 calculated by the equation satisfy 1.2≤S1/S2≤2.0.
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Inventors:
Kenji Okado
Ryoichi Fujita
▲瀧▼口 剛
Toshiyuki Ukai
Yasuhiro Ichikawa
Makoto Kambayashi
Iku Iida
Ryoichi Fujita
▲瀧▼口 剛
Toshiyuki Ukai
Yasuhiro Ichikawa
Makoto Kambayashi
Iku Iida
Application Number:
JP10681594A
Publication Date:
April 04, 2000
Filing Date:
May 20, 1994
Export Citation:
Assignee:
Canon Inc
International Classes:
G03G9/08; G03G9/10; G03G9/107; G03G9/113; G03G13/09; G03G15/01; G03G15/08; (IPC1-7): G03G9/10; G03G9/08; G03G9/113; G03G13/09; G03G15/01; G03G15/08
Domestic Patent References:
| JP534972A | ||||
| JP5119530A |
Attorney, Agent or Firm:
Giichi Marushima