Method and apparatus for transverse image registration on photoreceptive belts
US5208796A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1991 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Jan 3, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04787
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for transverse registration of image exposures on photoreceptive belts subject to lateral deviation from linear travel in which targets, corresponding in location to the image areas to be exposed, are used for the detection of lateral belt displacement and to control the transverse location of exposure scan. The targets are of a pattern defining a reference line and a line inclined with respect to the direction of belt travel so that the duration of time between passage of the target lines with respect to a spacially fixed sensing axis will vary with lateral displacement of the belt. The targets may assume a variety of specific patterns and the invention is applicable to single and multi-pass image exposure systems as well as to both modulated laser and light emitting diode types of exposure devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.