Electrophotography developer canister with material-moving roller
US5854961A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1997 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Jul 21, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0869
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Embodiments of a material-moving electrophotography roller are shown and described, each embodiment having an outer surface having ridges. The ridges may extend in right-handed or left-handed orientation, or in other angled (non-radial and non-horizontal) manner. The ridges lie in such a pattern so that the ridges move material radially over the roller or against a restrictive surface, and so that there are no gaps in the contact between the ridges and the material or the restrictive surface during a revolution of the roller. The roller is preferably made of a shaft covered by a sleeve or tube of non-disintegrating material with external ridges. The ridged tube is twisted and secured to the shaft so that the ridges run preferably and substantially at a 45.degree.-75.degree. angle from perpendicular to the roller axis. Alternatively, a monofilament line or other non-disintegrating cord may be wrapped and secured around a cylinder to create the ridges and troughs necessary for material movement and for distribution of the time of engagement of the ridges on material or surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.