Document-skew detection with photosensors
AssigneeUnisys Corporation
InventorsThomas Dragon, John Hylan, Robert Reynolds, Paul McCarthy, Paul Merchant, Kenneth Berkoben
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Abstract
Disclosed are Power Encoder means for imprinting MICR characters on checks, with optical check-sensing means disposed along a check-transport path, including optical skew-sensor means including a pair of area-photo-sensor means, one on each side of the check whereby the differential output thereof indicates "degree of skew".
Claims9
In a document-transport array for advancing prescribed documents along a prescribed path past one or several Process-Stations, in combination therewith, "document-skew" sensing means disposed at one or more of said stations, each said sensing means comprising a spaced pair of like area-photo sensors separated by the approximate document-length along said path and associated irradiation means bracketing the position of documents at said station, whereby each photosensor is arranged and adapted to output a prescribed signal whose magnitude is a measure of the degree to which an intervening document obscures it;
- and processing means adapted to receive said pairs of signals and indicate the difference therebetween.
Dependencies are inferred from the claim text.