Image forming apparatus having charging means
US5146281A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1990 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Sep 11, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S347/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus for forming images comprises a movable image bearing member and charger for charging the image bearing member while it is moving. The charger includes a contact member contactable to the image bearing member and a voltage applicator for applying a vibratory voltage between the contact member and the image bearing member. A latent image former is provided for forming a latent image along a scanning line on the image bearing member charged by the charger whereby the latent image is developed and transferred onto a transfer material, wherein a frequency f of the vibratory voltage and a speed Vp of the movement of the image bearing member are so selected that an interval between adjacent scanning lines multiplied by N or 1/N does not fall within a variation range of a spatial wavelength .lambda.sp where .lambda.sp=Vp/f.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.