Duplicator having function concerning specific mark put on recording sheet and image forming apparatus having function of processing confidential documents
US5798844A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1994 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Jul 20, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00867
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A specific mark adding unit adds a specific mark to a read-in image and a specific mark detecting unit detects the specific mark present in a read-in image. Further, a control unit changes a mode in which a read-in image is duplicated from an ordinary duplicating mode into a specific duplicating mode, the mode changing being made if the specific mark detecting unit has detected the specific mark present in the read-in image. The specific mode comprises a mode in which the read-in image is invalidated in data before being used in the duplicating operation. A unit is further provided causing the specific-mark adding function of the specific mark adding unit either to be activated or not to be activated. A unit is further provided causing the mode changing function of the mode changing unit either to be activated or not to be activated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.