Stir-transport member, development device provided therewith, and image forming apparatus
US8781371B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2012 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Sep 16, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A stir-transport member is formed on a circumferential surface of a rotation shaft with a first spiral blade, and a second spiral blade formed to overlap the region of the first spiral blade and is opposite the first spiral blade in phase and having a smaller radial-direction height than the first spiral blade. Sections of the spiral blades along the cross longitudinal direction thereof have trapezoidal shapes. The first spiral blade have a plurality of first swell portions, a part of each corresponding to a bottom of the trapezoidal shape and is more swollen than the other portions. The second spiral blade have a plurality of second swell portions, a part of each corresponding to the bottom of the trapezoidal shape and is more swollen than the other portions. The first spiral blade cross the second spiral blade at least at one of the first swell portions per turn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.