H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/17
H04N 1/06 (2006.01) G06K 7/015 (2006.01) H04N 1/00 (2006.01)
Patent
CA 1159140
BF&N 6943 DOCUMENT SCANNER ABSTRACT OF THE DISCLOSURE A scanner for scanning a document posi- tioned against a backing surface to determine the position of the document includes photoelectric transducers which provide electrical scan signals in dependence upon the light reflected from the docu- ment and from the backing surface at a plurality of moving scan positions as the scan positions move across both the document and the backing surface. A recognizable background image is defined on the document backing surface such that the photoelectric transducers provide a recognizable pattern of scan signals as the document backing surface is scanned, thereby indicating the position of the document. The recognizable background pattern may include a plurality of stripes on the document backing surface with the stripes extending substantially parallel to the direction of movement of the scan positions. Alternatively, the recognizable background pattern may include a plurality of stripes which extend sub- stantially perpendicular to the direction of move- ment of the scan positions. Alternate ones of the stripes may be black with intermediate ones of the stripes being white. A circuit means may be pro- vided for detecting the recognizable pattern of the scan signals.
373148
Gowling Lafleur Henderson Llp
The Mead Corporation
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