Developing roller manufacturing method, developing roller, developing device, and image forming apparatus
US8412080B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2009 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Dec 19, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4956
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing a developing roller, including: a first rolling process for forming a first inclined groove which is continuous in a helical shape, by rotating a first die having blades inclined with respect to an axial direction and a circumferential direction, and a non-bladed die, and feeding an unprocessed developing roller between the first die and the non-bladed die; and a second rolling process for forming a second inclined groove which is continuous in a helical shape and intersects with the first inclined groove, by rotating a second die having blades inclined with respect to an axial direction and a circumferential direction in the direction opposite to that of the first die, and the non-bladed die in the same direction opposite to that in the first rolling process, and feeding the developing roller between the second die and the non-bladed die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.