Electronic document scanner with a transparent imaging and drive roller
US5057942A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Apr 9, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/193
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improvement in the electronic imaging of documents, of the type wherein document sheets are transported at a uniform constant velocity past an electronic imaging member with the document sheet surface to be imaged maintained at a constant imaging distance from the electronic imaging member, wherein the document is fed through a document position and velocity holding and feeding nip formed between the outside wall of a rotatable transparent cylinder and an opposing nip forming member moving therewith, preferably an idler belt, and wherein the electronic imaging member is mounted inside the transparent cylinder to image this nip area through a narrow portion of the wall of the rotatable transparent cylinder and thereby to image scan only the narrow portion of the document which is being fed through and held in the nip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.