Image forming apparatus having photosensitive drum driven by stepping motor
US6172696A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Nov 5, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04794
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rotational shaft of a photosensitive drum is connected to a rotational shaft of a stepping motor by a coupling, so that the stepping motor directly drives the photosensitive drum. Here, .theta. (.degree.) indicating a step angle of the stepping motor, p (mm) indicating a distance between scanning lines on the photosensitive drum, .pi. indicating the circular constant, and d (mm) indicating a diameter of the photosensitive drum are set so as to satisfy an equation n.multidot..theta.=(360.multidot.p)/(.pi..multidot.d) to make an optical unit scan the photosensitive drum by one scanning line every time the photosensitive drum is made to rotate n steps, n being a positive integer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.