Developing device and image forming apparatus
US7421233B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2006 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Sep 19, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device (100) according to the present invention is provided with a housing (102) for holding toner, conveying screws (104, 105) arranged in the housing (2) and each including a rotary shaft (107) and a blade (106) arranged on the rotary shaft (107) for conveying the toner from one end of the rotary shaft (107) toward the other end thereof by the rotation of the rotary shaft (107), and a developing roller (103) provided in the housing with a part of the developing roller (103) being exposed from the housing, and rotatable to obtain the toner conveyed by the conveying screws (104, 105). The conveying screws (104, 105) are constructed, for the efficient agitation of the toner, such that toner pressing forces of the blades (106) differ depending the angle of rotation of the rotary shaft (107).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.