Image forming apparatus
US7471909B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2006 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Aug 9, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0634
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus including: an image bearing member having a photoconductive layer of a capacitance per unit area of 1.7×10−6 (F/m2) or more; and a developing device having a developer carrying member to which development voltage is applied for developing a latent image to form a toner image on the image bearing member, wherein the following expression is satisfied:where Q/M (C/g): an electric charge quantity per unit weight of the toner image, Vcont: a potential difference between a surface potential of the image bearing member and a direct current component of the development voltage, M/S (g/m2): a toner weight per unit area of the maximum density portion, Lt (m): a toner layer thickness in the maximum density portion, Ld (m): a photoconductive layer thickness, εt: a relative permittivity of the toner layer, εd: a relative permittivity of the photoconductive layer, and ε0 (F/m): a vacuum permittivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.