Claims
- 1. In a developing device for an image forming apparatus which comprises:
- a developer carrier comprising a dielectric layer for forming an electric field for development and for causing said developer carrier to retain and convey a developer to a developing region where a latent image is electrostatically formed on an image carrier which is to be developed by said developer;
- wherein said developer carrier is comprised of a dielectric layer formed of a material having a frequency characteristic such that a ratio of a maximum specific inductive capacity to a minimum specific inductive capacity in a frequency range of 50 mHz to 1 kHz is smaller than a predetermined value.
- 2. A developing device as claimed in claim 1, wherein said predetermined value is 2.
- 3. A developing device as claimed in claim 2, wherein said dielectric layer comprises elastic fluorine-based resin.
- 4. A developing device as claimed in claim 3, wherein said developer carrier further comprises an electrode layer provided on said dielectric layer and formed by dispersing conductive particles in elastic fluorine resin at spaced positions.
- 5. In a developing device for an image forming apparatus which comprises:
- a developer carrier comprising a dielectric layer for forming an electric field for development and for causing said developer carrier to retain and convey a developer to a developing region where a latent image is eletrostatically formed on an image carrier which is to be developed by said developer;
- wherein said developer carrier is comprised of a dielectric layer formed of a material having a frequency characteristic such that a ratio of a maximum specific inductive capacity to a minimum specific inductive capacity in a frequency range of 50 mHz to 1 kHz is smaller that a predetermined value, and wherein said predetermined value is 2.
Priority Claims (2)
Number |
Date |
Country |
Kind |
1-7973 |
Jan 1989 |
JPX |
|
1-271141 |
Oct 1989 |
JPX |
|
Parent Case Info
This application is a continuation-in-part of application Ser. No. 07/461,000, filed on Jan. 4, 1990, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0186767 |
Oct 1983 |
JPX |
0180112 |
Jul 1987 |
JPX |