Document reader module

Details Document reader module Document reader module

1986-06-26

1988-08-16

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 1, 382 7, 209569, 271264, 271273, 235439, 235470, 235484, 235485, G06K 944

Patent

active

047649763

ABSTRACT:
A document reader module which provides precise alignment for the document being read and the associated reader, like an optical reader. An integrated frame member provides accurate control surfaces for the precise alignment mentioned. An elevator mechanism mounted on the frame member provides an apparatus for adjusting the read head relative to the line of data on the documents being read. A special pinch roller construction, which can be locked in a retracted position, facilitates the removal of jammed documents from the associated document track.

REFERENCES:
patent: 3757942 (1973-09-01), Gunn
patent: 3825950 (1974-07-01), Kobayashi et al.
patent: 3872433 (1975-03-01), Holmes et al.
patent: 4167664 (1979-09-01), Pass
patent: 4245211 (1981-01-01), Kao
patent: 4309601 (1982-01-01), Nally et al.
patent: 4457017 (1984-06-01), Onogi et al.
Bergschneider, B. D. et al., "Pressure Roll Assembly for Document Cards," IBM Tech. Discl. Bull., vol. 14, No. 5, Oct. 1971, (N.Y.), pp. 1484-1485.
Hitachi Seisakusho K.K., Patent Abstracts of Japan, vol. 7, No. 188 (P-217) (1333), 8-17-83, Jp., A, 5887661, 5-15-83.

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