Development unit having a toner layer thickness regulation member
US5142330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jan 22, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A development unit comprising a development roller for developing a latent electrostatic image formed on an electrophotographic photoconductor to a visible toner image by applying a non-magnetic one-component type toner thereto, and a toner layer thickness regulation member for forming a toner layer on the above development roller, which toner layer thickness regulation member comprises at least (a) a rubber-like fluorosilicone polymer including repeat units of formula (I), (b) a silicone polymer comprising a copolymer of dimethyl silicone and methyl vinyl silicone with a crosslinking density of 4.times.10.sup.-4 to 8.times.10.sup.-4 mol/cc, and (c) an alkylene-oxide-addition type fluorine-containing surface active agent: ##STR1## wherein n is 1,000 to 600,000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.