Controlled velocity transport precession system
US4351605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1981 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | May 11, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/526
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical imaging system for scanning a document moving through an exposure zone. The imaging system comprises optical components including a mirror arrangement and a projection assembly for projecting reflected document images onto a flat portion of a photoreceptor. The optical components are stationary in a first mode of operation wherein documents are stream fed past the exposure zone at the process speed. In a second mode of operation, wherein multiple copies are made of the same document, the optical components are moved in a defined relationship so that the image is projected onto the photoreceptor in a direction opposite to the direction of photoreceptor motion. This form of image projection is termed image precession and results in additional time being available to replace the document at the start of scan portion without reduction in copy reproduction rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.