Glass ribbon width control method in float process

Details Glass ribbon width control method in float process Glass ribbon width control method in float process

1980-05-28

1982-01-26

Kellogg, Arthur D.

Glass manufacturing

Processes

With measuring, sensing, inspecting, indicating, or testing

65 99A, 651823, 651824, C03B 1804

Patent

active

043126561

ABSTRACT:
In a float process of flat glass production, the width of a glass ribbon formed by discharging a molten glass onto a molten metal bath is controlled in response to the temperature of a molten glass to be supplied to the molten metal bath by regulating a tweel to manipulate the rate of supplying a molten glass to the bath. Further to minimize a fluctuation of the glass ribbon width, either of two different feedback control modes, an integral control mode and a proportional-plus-integral control mode, is employed depending on whether or not an error between a measured width and a desired value is within a predetermined range of the error. Preferably the control is achieved in accordance with a sampled-data control system.

REFERENCES:
patent: 3607193 (1971-09-01), Bourggraff
patent: 4004900 (1977-01-01), Staahl et al.
patent: 4030902 (1977-06-01), Nagae

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