Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2005-09-27
2005-09-27
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C399S366000, C382S135000
Reexamination Certificate
active
06949757
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.
REFERENCES:
patent: 4524276 (1985-06-01), Ohtombe
patent: 4672859 (1987-06-01), Vatzov et al.
patent: 5038223 (1991-08-01), Yamada
patent: 5260582 (1993-11-01), Danek et al.
patent: 5279403 (1994-01-01), Harbaugh et al.
patent: 5502575 (1996-03-01), Kai et al.
patent: 5640467 (1997-06-01), Yamashita et al.
patent: 5682103 (1997-10-01), Burrell
Hasegawa Yutaka
Maeda Mamoru
Ohtsubo Kazuhisa
Ukai Takeshi
Yamagata Hideaki
Luu Thanh X.
Ricoh & Company, Ltd.
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