DEVELOPING APPARATUS AND IMAGE FORMING APPARATUS

Title:

DEVELOPING APPARATUS AND IMAGE FORMING APPARATUS

Document Type and Number:

Japanese Patent JP2014115518

Kind Code:

A

Abstract:

To coat a toner carrier with a stable and uniform toner layer.

A developing apparatus includes: developer containing non-magnetic toner and magnetic carrier; a developer container for storing developer; and a toner carrier which carries the toner to convey the toner to a developing part formed between the toner carrier and an image carrier on which an electrostatic latent image is formed. A surface of the toner carrier has a plurality of concave structures having a minimum opening width R of r_t10 to r_c10 (r_t10 is a particle diameter in which an accumulated number distribution in a toner particle distribution is 10%, and r_c10 is a particle diameter in which an accumulated number distribution in a carrier particle distribution is 10%), and a depth D of r_t10/2 or larger. A ratio of the concave structures per unit area in a toner carrying region of the toner carrier is equal to or larger than 55%.

Inventors:

KUBO KENTA
TADA TATSUYA
YAMANAKA OSAMU
OKAMOTO HIDEAKI

Application Number:

JP2012270394A

Publication Date:

June 26, 2014

Filing Date:

December 11, 2012

Export Citation:

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Assignee:

CANON KK

International Classes:

G03G15/08

Domestic Patent References:

JPS5765354U	1982-04-19
JPH06337580A	1994-12-06
JPS6186773A	1986-05-02
JPS57147669A	1982-09-11
JP2011075803A	2011-04-14
JP2010139608A	2010-06-24
JPH0812510B2	1996-02-07

Attorney, Agent or Firm:

Nakagawa International Patent Office

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