Scanning gauge control for sheet processing apparatus

Details Scanning gauge control for sheet processing apparatus Scanning gauge control for sheet processing apparatus

1974-06-10

1976-12-28

Botz, Eugene G.

Registers

Transfer mechanism

Traveling pawl

425141, 23515135, G01n 2556

Patent

active

040004023

ABSTRACT:
A method and apparatus for controlling the machine direction variations of a property or properties of a sheet material being processed. A scanning gauge moved back and forth across the sheet material as it is moved in the machine direction, takes measurements of the property being controlled at fixed intervals across the sheet and a true profile is computed from the measurements made. At the end of each scan of the gauge the average of all the true profile points is computed. A control variable affecting the sheet property is manipulated so as to maintain the machine direction property of the sheet at some target value as a function of the array of values comprising the true profile, the gauge readings of the sheet property and the true profile average.

REFERENCES:
patent: 3307215 (1967-03-01), Gerhard et al.
patent: 3610899 (1971-10-01), Dahlin
patent: 3612839 (1971-10-01), Dewitt

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