Electronic copying machine
US5220436A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1991 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Oct 28, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0452
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic copying machine for making a hard copy of a remote surface has a taking lens for forming an image of the remote surface and an image sensor which scans the image to provide video signals. The electronic copying machine is provided with a scanning area projecting device for projecting a frame onto the remote surface which defines an area of the image of the remote surface to be scanned. The scanning area projecting device comprises a frame slit plate formed with a plurality of frame slits for forming different sizes of slit frame images, a masking plate for selectively masking the frame slits and a source of illumination for illuminating the slit plate so as to project onto the remote surface a frame image of a size selected by the masking plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.