Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Sorting bottles – ampoules – jars – drinking vessels – or like...
Patent
1982-09-27
1984-12-11
Scherbel, David A.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Sorting bottles, ampoules, jars, drinking vessels, or like...
209588, 250223B, 356240, 358106, B07C 5342
Patent
active
044873220
ABSTRACT:
A method for detecting a substantially transverse refractive defect in the sidewall of a transparent container is disclosed. The method comprises the steps of directing a filtered source of diffused light toward the sidewall of the container to provide an intensity gradient varying in a direction substantially parallel with the longitudinal axis of the container and sensing the intensity of light at a plurality of positions in a field-of-view aligned along a path in the plane of the sidewall and generally parallel with the longitudinal axis of the container. The method further comprises the step of producing a plurality of pixel signals each having a magnitude corresponding to the intensity of light sensed at each position in the field-of-view, whereby the shape of the wave train of pixel signals corresponds to the longitudinal intensity gradient in the absence of a transverse refractive defect and a detectable defect signature superimposed on the longitudinal gradient in the presence of a transverse refractive defect. The method finally includes the steps of analyzing the wave train of pixel signals to detect the presence of a defect signature and rejecting the container in response to a defect signal.
REFERENCES:
patent: 2326007 (1943-08-01), Capstaff
patent: 3886356 (1975-05-01), Gomm et al.
patent: 3926525 (1975-12-01), Sheldrick
patent: 3987301 (1976-10-01), O'Conner
patent: 4376951 (1983-03-01), Miyazawa
patent: 4378495 (1983-03-01), Miller
Click Myron E.
Foster Glenn
Owens--Illinois, Inc.
Scherbel David A.
Welch Gerald T.
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