Image forming apparatus with light-scanning unit having supporting member
US6278471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2000 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Feb 10, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0428
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An object of the invention is to reproduce a faithful image irrespective of thermal expansion of a light-scanning unit and to reproduce a faithful image without enhancing the strength of the light-scanning unit excessively. A pair of supporting portions of a light-scanning unit, each having a flat face, are supported in linear contact with a right column-shaped supporting member provided with the apparatus body. The light-scanning unit is provided on the supporting member near to a starting position where writing image data on a photosensitive body with a scanning line is started in a main scanning direction so as not to be mutually displaced relative to the supporting member. Thereby, the light-scanning unit is allowed to extend in the longitudinal direction of the supporting member due to thermal expansion of the light-scanning unit. Also, an elongated supporting member made of stainless steel penetrates a base body of a light-scanning unit made of synthetic resin which scans in scanning line of laser light on the photosensitive body to exposure, to support the light-scanning unit. The center of gravity of the light-scanning unit is positioned near to the supporting member and ve…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.