G - Physics – 06 – M
Patent
G - Physics
06
M
340/123.1
G06M 7/06 (2006.01) B65H 7/12 (2006.01) G07D 11/00 (2006.01)
Patent
CA 1306031
APPARATUS FOR DETECTING THE PASSAGE OF MULTIPLE SUPERPOSED SHEETS ALONG A FEED PATH Abstract of the Disclosure A multiple sheet detection apparatus includes first and second cooperating rollers (12, 14), the second roller (14) being movable away from the first roller (12) in response to the passage of a single or multiple sheet between the rollers (12, 14). Voltage generating means (42) produce an output voltage which varies linearly with movement of the axis of the second roller relative to the axis of the first roller (12). Data processing means sample this voltage a predetermined number of times over one complete revolution of the first roller (12), first with no sheet present and then with a single or multiple sheet passing between the rollers (12, 14), to produce first and second values which are respectively representative of the sums of the voltages sampled during each such revolution. The first value is subtracted from the second value to produce a third value on the basis of which the number of sheets corresponding to the second value is determined.
599079
Ncr Corporation
Smart & Biggar
LandOfFree
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