Developing device and image forming apparatus

Patent metadata

Field	Value
Publication number	US-8958724-B2
Application number	US-201314085057-A
Country	US
Kind code	B2
Filing date	Nov 20, 2013
Priority date	Nov 22, 2012
Publication date	Feb 17, 2015
Grant date	Feb 17, 2015

Abstract

A developing device of this disclosure has: a housing, a developing roller, a developer conveying path, a partition board, a second communication path, a developer receiving port, a first conveying member, a second conveying member, and a conveyance capability inhibition part. A toner is cyclically conveyed in a first conveying path and a second conveying path. A first stirring screw is disposed in the first conveying path and driven into ration around a first rotation axis for toner conveyance. Formed downstream of the first stirring screw by the conveyance capability inhibition part is a toner accumulation part, and the amount of toner refilled from a toner refill port is adjusted. Where an aperture area of the first communication path is A1 and a circular area formed by an outer circumferential edge of the first stirring screw in section orthogonal to the first rotation axis is A2, relationship 0.5×A2<A1<1.2×A2 is satisfied.

First claim

What is claimed is:

1. A developing device comprising:
a housing including a pair of wall parts;
a developing roller being rotatably supported in the housing between the pair of wall parts, and carrying a developer;
a developer conveying path including in the housing: a first conveying path being arranged in a manner such as to be spaced from the developing roller and conveying the developer in a first direction; and a second conveying path being arranged between the developin…

Assignees

• Kyocera Document Solutions Inc

Inventors

• Nakaue Takahisa
• Wada Minoru
• Okada Shizuka
• Yotsutsuji Takefumi
• Yamaguchi Akifumi
• Shimizu Tamotsu

Classifications

• G03G15/0879

  Physics · mapped topic

• G03G15/0893 Primary

  Physics · mapped topic