Misfeed detector

Details Misfeed detector Misfeed detector

1979-03-28

1981-09-29

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

G01N 2186

Patent

active

042925290

ABSTRACT:
A clamp for holding paper on a paper drum contains an aperture which may be optically scanned to detect the presence of paper in the clamp. The clamp is placed near the corner or edge of the document so that the registration of the paper will be known. A single detector scans the aperture as the registration clamp moves relative to the detector and looks for a dark-light-dark sequence of video signals to verify that paper is properly positioned in the clamp.

REFERENCES:
patent: 3684890 (1972-08-01), Hayne et al.
patent: 3832065 (1974-08-01), Sullivan et al.
patent: 3948170 (1976-04-01), Ericsson

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