Multicolor image forming apparatus having improved registration
US5016062A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1990 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Jan 2, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0103
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for forming multicolor toner images includes an endless web having rows of perforations along each edge. In one embodiment, two or more drums have sprockets on each end. These sprockets engage the rows of perforations in the web. Toner images of different color are created in each drum by creating electrostatic images and toning those images with toners of different colors. The toner images are transferred in registration to the web. The number of perforations in the web is chosen to create a small amount of slack between the drums which permits the sprocket teeth to orient the web with respect to each drum thereby preventing misregistration due to skew, for example, because of misalignment of the axes of the drums. According to a second embodiment a similar registration scheme is used with images that are formed by exposing and toning the same portion of a photoconductive web with toners of different color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.