Developing apparatus having a sealed developer bearing member, process cartridge, and image forming apparatus
US10345756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2017 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Aug 23, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/181
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process cartridge of an image forming apparatus includes a seal member to seal a first gap between an end portion of a developer bearing member and a frame, and a sealing portion that seals a second gap between the frame and an end portion of the seal member. The frame includes an injection inlet through which elastomer has been injected into the second gap for forming the sealing portion, a storage portion that is a space surrounded by a second surface of the frame and a wall protruding from the second surface and in which elastomer spilling out of the second gap is stored, and a protruding portion that protrudes, from the second surface of the frame, further than the wall of the storage portion. The protruding portion contacts a conveyed recording medium when the process cartridge is mounted in an apparatus main body of the image forming apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.