Sheet feeder with ultrasonic double feed detector

Details Sheet feeder with ultrasonic double feed detector Sheet feeder with ultrasonic double feed detector

2007-04-05

2010-02-02

Mackey, Patrick H (Department: 3653)

Sheet feeding or delivering

Feeding

With means to interrupt feeding

C271S265040

Reexamination Certificate

active

07654522

ABSTRACT:
A sheet feeder includes: a feeding roller for feeding a sheet; a press member for pressing the sheet against the feeding roller; and a double feed detector for detecting double feed of the sheets when the sheets are fed in superimposition; wherein the feeding roller and the press member are opposed each other at a sheet holding portion for holding the sheet to be fed therebetween, and the double feed detector is placed to be able to detect double feed of the sheets in a region being adjacent to the sheet holding portion, an amplitude of the sheet being suppressed in the region.

REFERENCES:
patent: 2003/0006550 (2003-01-01), Chujo et al.
patent: 2005/0189707 (2005-09-01), Sano et al.
patent: 1-68349 (1989-05-01), None
patent: 2005-162426 (2005-06-01), None

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