Invention Grant
- Patent Title: Transfer roll and image forming apparatus
- Patent Title (中): 转印辊和成像装置
-
Application No.: US13401114Application Date: 2012-02-21
-
Publication No.: US08792813B2Publication Date: 2014-07-29
- Inventor: Nobuyuki Ichizawa
- Applicant: Nobuyuki Ichizawa
- Applicant Address: JP Tokyo
- Assignee: Fuji Xerox Co., Ltd.
- Current Assignee: Fuji Xerox Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2011-171275 20110804
- Main IPC: G03G15/16
- IPC: G03G15/16

Abstract:
A transfer roll includes a cylindrical conductive substrate; an inner elastic layer having an Asker-C hardness of from 5° to 20°; and an outer elastic layer having an Asker-C hardness of from 30° to 45° in this order, wherein the transfer roll satisfies the following Expression (1): ρ0(in)>ρ0(out) Expression (1): wherein ρ0(in) is a volume resistivity of the inner elastic layer that is measured by applying an applied voltage of 1000 V in an environment of a temperature of 22° C. and a humidity of 55 RH % in an unloaded state, and ρ0(out) is a volume resistivity of the outer elastic layer that is measured by applying an applied voltage of 1000 V in an environment of a temperature of 22° C. and a humidity of 55 RH % in an unloaded state.
Public/Granted literature
- US20130034373A1 TRANSFER ROLL AND IMAGE FORMING APPARATUS Public/Granted day:2013-02-07
Information query