Calender control system for sheetmaking

Details Calender control system for sheetmaking Calender control system for sheetmaking

1989-01-27

1991-01-01

Ruggiero, Joseph

Boots, shoes, and leggings

162252, 162DIG10, 364471, 364572, G06F 1546

Patent

active

049823345

ABSTRACT:
A system for controlling the calendering of sheet materials includes means for receiving measurements of one property of sheet material during production wherein the input to the system represents the setpoints of a calender profile actuator system. In operation, the system first calculates a linear trend line from a pattern of setpoints. Then, the linear trend line is substrated from the pattern of setpoints and used to control an edge loading system. The residual setpoints are provided to a frequency splitter whose low frequency output is used to determine the setpoints of a crown roll system and whose high frequency output is used to determine the setpoints of a calender profile actuator system.

REFERENCES:
patent: 3496344 (1970-02-01), Chope
patent: 3557351 (1971-01-01), Doering
patent: 4453404 (1984-06-01), Powell et al.
patent: 4648712 (1987-03-01), Brenholdt
patent: 4674045 (1987-06-01), Kerber et al.
patent: 4707779 (1987-11-01), Hu
patent: 4791863 (1988-12-01), Vahatalo

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