Glass plate heating apparatus

Details Glass plate heating apparatus Glass plate heating apparatus

1989-03-28

1990-03-20

Woodward, Joye L.

Glass manufacturing

Control responsive to condition sensing means

Temperature or heater control

65273, 65287, 65DIG13, 364473, C03B 2302

Patent

active

049098225

ABSTRACT:
A local heater is arranged in a heating furnace in which glass plates are continuously conveyed, and a bending line on each glass plate is forcibly heated. The local heater is elongated, and positions of both ends of the local heater are independently and digitally controlled in a widthwise (X-axis) direction of the heating furnace. Control point data along the bending line is obtained by interpolating coordinate values of both ends of the bending line. X-axis velocity control is performed such that the local heater is located on the glass bending line in synchronism with conveyance of the glass plate. A heating locus is linear, and the operation of the local heater is not stepwise. An offset of the actual heating locus from the bending line can be minimized.

REFERENCES:
patent: 4726832 (1988-02-01), Kajii et al.
patent: 4783211 (1988-11-01), Fuchigami et al.

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