Hall effect sensor for detecting double fed sheets

Details Hall effect sensor for detecting double fed sheets Hall effect sensor for detecting double fed sheets

1994-12-19

1997-09-02

Merritt, Karen B.

Sheet feeding or delivering

Feeding

With means to interrupt feeding

27126504, B65H 712

Patent

active

056623240

ABSTRACT:
Apparatus for singulating sheets of paper and detecting a double feed. The apparatus includes: a sheet feeder having a feed deck; a separator wheel housing secured to the feed deck; a separator wheel mounted in the separator wheel housing; a stone mount located beneath the separator wheel, the stone mount being secured to the feed deck; a separator stone mounted in the stone mount beneath the separator wheel; a Hall effect sensor located in the stone mount downstream of the separator stone; and a magnet secured to the feeder, the magnet being biased against the Hall effect sensor, whereby the Hall effect sensor can detect feed without being effected by any fluctuations in the feed deck.

REFERENCES:
patent: 4426785 (1984-01-01), Loftus et al.
patent: 4934684 (1990-06-01), Gysling
patent: 5104112 (1992-04-01), Briggs et al.
patent: 5145163 (1992-09-01), Cowan et al.
patent: 5195738 (1993-03-01), Gysling
patent: 5293118 (1994-03-01), Grossmann et al.
patent: 5437445 (1995-08-01), Chang et al.

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