Image forming apparatus which monitors hardware errors of a controller of a copying-inhibited function
US5640467A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Mar 28, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/0088
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A controller accurately discriminates a copying-inhibited document prepared by using paper on which a copying-inhibited pattern is printed or copied on the entire surface, executes the copying inhibition control, detects a hardware error, and executes the copying inhibition control upon detection of the hardware error by recognizing a copied document as a copying-inhibited document and executing copying inhibition control when a copying-inhibited document detected signal is inputted during an operation for reading a copied document from the copying-inhibited document discriminator, and also by determining that a hard error has occurred in the copying inhibition discriminating board, giving a warning through an operation displaying unit, and executing a copying inhibition control when a copying-inhibited document signal or a copying-inhibited document not-detected signal is inputted during a period other than that for reading a copied document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.