Title:
DEVELOPING DEVICE AND IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2023112641
Kind Code:
A
Abstract:
To provide a developing device that can prevent unevenness of screw pitch, and an image forming apparatus.SOLUTION: A developing device carries, with the action of a magnetic field, a developer including toner and magnetic carrier and conveyed by a supply and conveying screw 143 being a conveying screw in a developer storage part, on a surface of a developing sleeve 141 being a developer carrier, and conveys the developer carried on the surface of the developing sleeve to a developing area. When the minimum distance between an apex 143a of a blade of the supply and conveying screw 143 and the surface of the developing sleeve is defined as L, L≤6[mm], and the screw pitch P of the supply and conveying screw 143 satisfies the relationship of 1.5×L+2.74≤P≤0.64×L+9.74.SELECTED DRAWING: Figure 3
Inventors:
MASE RYUSUKE
MATSUMOTO KENTARO
KUBOTA TOMOHIRO
YABUTA YUTA
HASHIKAWA HOTARU
SUGANUMA TAKUYA
MATSUMOTO KENTARO
KUBOTA TOMOHIRO
YABUTA YUTA
HASHIKAWA HOTARU
SUGANUMA TAKUYA
Application Number:
JP2022055668A
Publication Date:
August 14, 2023
Filing Date:
March 30, 2022
Export Citation:
Assignee:
RICOH CO LTD
International Classes:
G03G15/08; G03G15/09
Attorney, Agent or Firm:
Hisashi Kuroda