Title:
IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
Document Type and Number:
Japanese Patent JP2021021752
Kind Code:
A
Abstract:
To provide, in the present invention, an image forming apparatus that can prevent the occurrence of a ghost image and uneven charging.SOLUTION: An image forming apparatus of the present invention comprises: an image carrier; and a charging roller that charges a peripheral surface of the image carrier to a positive polarity. The image carrier includes a conductive substrate and a single-layer photosensitive layer and satisfies the formula (1). The photosensitive layer contains a charge generating agent, a hole transport agent, an electron transport agent, and a first binder resin. The charging roller includes a conductive shaft, a base layer that covers a surface of the conductive shaft, and a surface layer. The volume resistivity of the surface layer is 13.0 logΩ cm or more at a temperature of 32.5 degrees and a humidity of 80%RH. (Q represents the amount of electrified charge of the image carrier, S the area of charging of the image carrier, d the thickness of the photosensitive layer, εr the dielectric constant of the first binder resin contained in the photosensitive layer, ε0 the dielectric constant of vacuum, and V a value calculated from V=V0-Vr.)SELECTED DRAWING: Figure 12
Inventors:
ISHINO MASATO
NISHIMURA KEIYA
IMANAKA YOSHITAKA
FUJITA TOSHIKI
NISHIMURA KEIYA
IMANAKA YOSHITAKA
FUJITA TOSHIKI
Application Number:
JP2019136260A
Publication Date:
February 18, 2021
Filing Date:
July 24, 2019
Export Citation:
Assignee:
KYOCERA DOCUMENT SOLUTIONS INC
International Classes:
G03G15/02; F16C13/00; G03G5/04; G03G5/05
Domestic Patent References:
| JP2019078871A | 2019-05-23 | |||
| JP2006113377A | 2006-04-27 | |||
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| JP2020204679A | 2020-12-24 | |||
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Foreign References:
| WO2018079038A1 | 2018-05-03 | |||
| US20130308982A1 | 2013-11-21 |
Attorney, Agent or Firm:
Hiroyuki Maei