System for preventing cracking of glass ribbon in plate manufact

Details System for preventing cracking of glass ribbon in plate manufact System for preventing cracking of glass ribbon in plate manufact

1975-11-13

1976-08-17

Kellogg, Arthur D.

Glass manufacturing

With signal, indicator, inspection means, register, or recorder

65 28, 65159, 65160, C03B 1802

Patent

active

039751775

ABSTRACT:
A sensor laterally scans a glass ribbon, while it is advanced on a molten metal confined by a bath, by laser beam to detect an unmelted extraneous substance floating on the glass ribbon generating an electrical signal representative of the presence of the extraneous substance. Heating means, which is positioned in the vicinity of the exit of the bath, is automatically energized in response to the signal to prevent cracking of the glass ribbon due to the extraneous substance when it is picked up from the bath to roller conveyors of a lehr.

REFERENCES:
patent: 3223502 (1965-12-01), Ward et al.
patent: 3249224 (1966-05-01), Uhlig
patent: 3533704 (1970-10-01), Krenmayr
patent: 3607193 (1971-09-01), Bourggraff et al.
patent: 3694181 (1972-09-01), Dear

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