Means and method for inspecting in-process aerosol container clo

Details Means and method for inspecting in-process aerosol container clo Means and method for inspecting in-process aerosol container clo

1976-06-28

1977-09-13

Knowles, Allen N.

Classifying, separating, and assorting solids

Adhesion

Coated surface or mass

209 75, 2091118, B65G 4734

Patent

active

040476138

ABSTRACT:
An optical and electromagnetic system for checking aerosol container closures for split curls, and for the presence of a continuous bead of sealing compound. The compound is applied to a depression about the periphery of inverted closures, and closures conveyed in single file fashion to an inspection station. A light source disposed in a rotating head above the inspection station scans the periphery of each closure, while a sensor rotating with the source responds to interruptions or voids in the compound. An electromagnetic transducer is rotatably mounted beneath the station and simultaneously scans the curl at the bottom of the inverted closure, producing a defect signal if a split curl is detected. A signal processing system prevents the system from reacting to spurious signals caused by the transit of closures past the inspection station. A counting stage delays the application of a reject signal until the defective closure has passed to an ejection station, at which time an ejection mechanism is triggered and the closure removed from the conveying system.

REFERENCES:
patent: 2070339 (1937-02-01), Moore
patent: 3346112 (1967-10-01), Brown et al.
patent: 3462015 (1969-08-01), Tysver et al.
patent: 3789983 (1974-02-01), Senesky et al.
patent: 3880750 (1975-04-01), Butler et a.

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