Glass manufacturing – Processes – With measuring – sensing – inspecting – indicating – or testing
Patent
1987-09-15
1988-11-01
Lindsay, Robert L.
Glass manufacturing
Processes
With measuring, sensing, inspecting, indicating, or testing
65160, 65335, 198437, C03B 300
Patent
active
047817429
ABSTRACT:
An apparatus and a method for inspecting cullet for the presence of unwanted materials among the pieces of glass. A light source such as a laser directs light onto the cullet. At least one array of at least two light detectors is positioned to detect reflected light from the cullet. The detectors differentiate between non-uniformly scattered light from the cullet and generally uniformly scattered light from the debris. Signalling means are provided to signal the differentiation thereby to indicate the presence of debris in the cullet under inspection. When cullet is present on a moving cullet belt, light from the light source is intermittently scanned over the cullet in a raster-type scan. A multi-faceted rotatable mirror may be employed intermittently to reflect light onto the cullet.
REFERENCES:
patent: 3938976 (1976-02-01), Walker
patent: 4145202 (1979-03-01), Grodin et al.
patent: 4582520 (1986-04-01), Sturm
patent: 4585343 (1986-04-01), Schave et al.
Automating the Transporting and Charging of Batch and Cullet into a Tank Furnace, Budov et al, Glass & Ceramic (U.S.A.), vol. 28, #1,2, Feb. 1971, pp. 212-214.
Hill Barry R.
Ring David M.
Lindsay Robert L.
Pilkington plc
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