Specific document determining apparatus including a microwave sensor
US6949757B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2003 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Oct 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00875
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present specific document determining apparatus according to the present invention comprises a microwave sensor for irradiating a microwave to and scanning a document, detecting a reflected portion of the irradiated microwave, outputting a first detection signal, again irradiating a microwave and scanning the document after the document is placed on a contact glass, detecting a reflected portion of the irradiated microwave, and outputting a second detection signal; a signal processing section for using the first detection signal as a reference signal and comparing a level of the reference signal to a level of the second detection signal to make determination as to whether metallic fiber is included in the document or not, and a controller for making determination as to whether the document is a specific one or not according to a result of determination by the signal processing section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.