Patent ID: 6025603
Filing Date: 2000-02-15
Classification: G03G,G07D,H04N

Abstract:
A specific document determining apparatus in which a document as an object to be determined is placed on a document base and is covered with a pressure plate, a microwave is irradiated to said document for scanning, a reflected portion of said irradiated microwave is detected to make determination as to whether metallic fiber is included in said document or not, and it is determined that said document is a specific one such as a bill or marketable securities with metallic fiber included therein when it is determined that metallic fiber is included in the document; said specific document determining apparatus comprising:a detector which irradiates a microwave to and scans a specified area of said specific document determining apparatus before said document is placed on said document base, detects a reflected portion of said irradiated microwave, outputs a first detection signal, then irradiates a microwave to and scans said document after said document is placed on said document base and is covered with said pressure plate, detects a reflected portion of said irradiated microwave, and outputs a second detection signal;a first determining unit for making determination as to whether metallic fiber is included in said document or not by using said first detection signal as a reference and comparing a level of said reference signal to a level of said second detection signal; anda second determining unit for making determination according to a result of determination by said first determining unit whether said document is said specific document or not.