Method and apparatus for detecting the multiple feeding of docum

Details Method and apparatus for detecting the multiple feeding of docum Method and apparatus for detecting the multiple feeding of docum

1979-08-09

1981-01-06

Stoner, Jr., Bruce H.

Communications: electrical

Condition responsive indicating system

Specific condition

209569, 235449, 271258, 271263, 3401463C, G08B 2100, B65H 712

Patent

active

042439833

ABSTRACT:
A method and apparatus for detecting a multiple-feed situation with regard to documents having encoding arranged thereon in a predetermined manner and with the documents being moved along a transport path. In a preferred embodiment of the invention, the documents are encoded with magnetic ink. A sensing member is positioned along the transport path in operative relationship with the encoding on the documents for generating a first signal in response to a character of the encoding being in moving relationship with the sensing means. A first circuit is used for receiving the first signal and for generating a first time frame. A second circuit is used for generating a second time frame beginning upon the expiration of the first time frame; and a third circuit is used for generating an output signal indicative of a multiple-feed situation when a subsequent signal from the sensing means occurs during the second time frame.

REFERENCES:
patent: 3221303 (1965-11-01), Bradley
patent: 3629822 (1971-12-01), Johnson
patent: 3890597 (1975-06-01), Hanchett
patent: 4031402 (1977-06-01), Dlugos et al.

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