Image plane registration system for electrographic systems
US5893658A · kind A · utility
Inventors
Key dates
| Filing date | Oct 17, 1997 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Oct 17, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0174
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for minimizing image banding and for registering multiple image planes of a single image on a receptor drum in electrographic systems. The system for registering multiple image planes of a single image in an electrographic system includes a receptor drum capable of capturing two or more overlaying image planes, an exposure device for forming overlaying image planes on the receptor drum, and at least one developer station transferring a developer to the receptor drum corresponding to each of the overlaying image planes. A measuring device is provided for measuring the rotational position of the receptor drum. A drive mechanism is provided for controlling a motor coupled to the receptor drum by at least one drive belt. A closed loop positioning system is coupled to the measuring device and the drive mechanism. The closed loop positioning system is capable of modulating the angular velocity of the receptor drum to achieve image plane registration of the two or more image planes. The system is capable of achieving image plane registration error of preferably about 100 micrometers or less, more preferably about 50 micrometers or less, and most preferably about 20 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.