Document-skew detection with photosensors

Details Document-skew detection with photosensors Document-skew detection with photosensors

1989-10-10

1991-06-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250223R, 271261, G01N 2186, G01N 4014

Patent

active

050216767

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".

REFERENCES:
patent: 3248524 (1966-04-01), Sanner
patent: 3866053 (1975-02-01), Emura et al.
patent: 3948170 (1976-04-01), Ericsson
patent: 4201378 (1980-05-01), Hams
patent: 4228886 (1980-10-01), Moran
patent: 4238780 (1980-12-01), Doemens
patent: 4518862 (1985-05-01), Dorn
patent: 4641272 (1987-02-01), Sasaki et al.
patent: 4832780 (1989-05-01), Ishijo et al.

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