Apparatus for detecting double-feed of paper

Details Apparatus for detecting double-feed of paper Apparatus for detecting double-feed of paper

2008-05-13

2008-05-13

Mackey, Patrick (Department: 3653)

Sheet feeding or delivering

Feeding

By means to convey sheet

C271S258010

Reexamination Certificate

active

11125106

ABSTRACT:
Disclosed are an apparatus and method for detecting double-feed of paper to prevent banking accidents or jam in a paper handling machine for handling paper, sheets of currency note are not separated by a sheet separating means and thus plural sheets are double fed. The apparatus includes paper feeding means for guiding upper and lower surfaces of the paper and feeding the paper, a pivot member pivotally installed to a rotary shaft, and having a contact portion disposed in a paper feeding path of the paper feeding means and contacting with one surface of the feeding paper, and an encoder portion with a plurality of slits, in which the rotary shaft is closer to the contact portion rather than the encoder portion, and a sensor for counting the number of slits of the encoder portion when the pivot member pivots. The present invention can accurately detect the overlay of the paper having a thin thickness with a simple construction. Also, the present invention can detect the overlay of the paper, regardless of a size and thickness of the paper and a transferring direction of the paper.

REFERENCES:
patent: 4431358 (1984-02-01), Jenkner
patent: 5101097 (1992-03-01), Conant
patent: 5322269 (1994-06-01), Fukube et al.
patent: 5685540 (1997-11-01), Kobayashi et al.
patent: 7038703 (2006-05-01), Ehrhardt
patent: 2004/0085434 (2004-05-01), Hayashi
patent: 4-116043 (1992-04-01), None
patent: 4-350029 (1992-12-01), None
patent: 6-234440 (1994-08-01), None

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