Title:
TONER, METHOD FOR MANUFACTURING TONER AND DEVELOPING DEVICE USING THAT TONER
Document Type and Number:
Japanese Patent JP3400434
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide irregular toner having narrow distribution of grain size of toner particles and to provide a method for easily manufacturing the toner and a developing device using that toner.
SOLUTION: In the toner particles having the average particles size d (wherein d ranges 4 to 15 μm), the proportion of particles having the particle diameter within the range of d±0. 2d, calculated in terms of volume to the toner is ≥90%, and the specific surface area of the toner per 1 cm3 A (m2/g) measured by BET method, and the specific gravity D (g/cm3) satisfy the relation of 7/(D.d)≤A≤10/(D.d). By the method, the grain size distribution of toner particles can be narrowed and the resolution of the image is improved, and toner having ≥10 μC/g electrification is obtained with extremely narrow distribution. Thus, high definition of images can be obtained.
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Inventors:
Hiroshi Sasaki
Kishiro Iwasaki
Kenji Murao
Kishiro Iwasaki
Kenji Murao
Application Number:
JP2001041101A
Publication Date:
April 28, 2003
Filing Date:
September 17, 1993
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G03G9/08; G03G9/087; G03G15/00; (IPC1-7): G03G9/08; G03G9/087; G03G15/00
Domestic Patent References:
| JP466957A | ||||
| JP2248959A | ||||
| JP3259161A |
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)
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