Developer supply device and developer
US7512358B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2006 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Jul 12, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0815
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner leakage restrainer is disposed in an opening formed in a development cartridge case. In the development cartridge, the toner which contains fine particles only in a small amount is accommodated such that fusion bonding of the toner to the lower film is not caused even when ten thousand sheets are printed in succession. In the toner, a ratio of the powder particles having a circle equivalent diameter of 3 to 20 μm and a circularity of 0.98 or more to the entire powder particles is 60% or more based on the number of the particles, and a ratio of the powder particles having a circle equivalent diameter of 3 μm or less to the entire particles is 35% or less based on the number of particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.