Image sampling and color shift correction system in multiple image forming apparatus
US5587771A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1995 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Apr 17, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0161
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sampling and color shift correction system in a multiple image forming apparatus forms a multiple image by providing a plurality of image output units along a transfer belt. An image control unit applies image data to the image output units. A pattern generator repeatedly generates a register shift measurement pattern in the main scanning direction and the sub-scanning direction of the respective image output units. The register shift measurement pattern is formed outside of the largest paper area. A sampling unit samples an image formed by the respective image output units at both sides of a paper on the transfer belt in the main scanning direction of the transfer belt. A processing unit takes data sampled by the sampling unit and processes the amount of register shift. A control unit controls the image output and image sampling correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.