Image forming apparatus and image forming method
US10802412B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2020 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Mar 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/0005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus including developing unit to develop electrostatic latent image with toner to form visible image, and cleaning unit including elastic member including surface layer and configured to remove the toner, wherein Martens hardness A and Martens hardness B of the surface layer measured by applying load of 1 μN and load of 1,000 μN, respectively, to position of the surface layer in thickness direction thereof using nanoindenter are both 2.5 N/mm2 or greater but 32.5 N/mm2 or less, and Martens hardness A and Martens hardness B satisfy inequality, Martens hardness A>Martens hardness B wherein coefficient of dynamic friction of the surface layer against polycarbonate is 0.5 or less, and the toner includes polyester resin insoluble to THF and Tg of THF-insoluble component of the toner determined from DSC curve of first heating of DSC is −60° C. or higher but 20° C. or lower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.