Method and apparatus for inspecting empty cans entirely automati

Details Method and apparatus for inspecting empty cans entirely automati Method and apparatus for inspecting empty cans entirely automati

1980-09-26

1983-05-31

Reeves, Robert B.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Nonconveying driven means for turning item at separating or...

209556, 209558, B07C 5344

Patent

active

043856993

ABSTRACT:
Method and apparatus for inspecting empty cans entirely automatically includes a flange inspecting process and a drawing condition inspecting process. The flange and the drawing condition inspections are simultaneously carried out in the same inspecting station during the forcible rotation of the can. The flange portion is checked for craks and length, and the outer body surface is checked for the drawing conition respectively in a non-destructive and contactless manner by utilization of static electromagnetic inspection and light reflection inspection methods. A prestored reference value signal, which is compared with a converted electrical signal for the determination of whether cans are good or not, is a signal of a value calculated by a microcomputer on the basis of values which are sampled, equally divided, signal values corresponding to one rotation of a forcibly rotated standard good empty can.

REFERENCES:
patent: 2742151 (1956-04-01), Milford
patent: 3416659 (1968-12-01), Linderman et al.
patent: 3880750 (1975-04-01), Butler et al.
patent: 4002966 (1977-01-01), Hinds et al.
patent: 4029958 (1977-06-01), Wright
patent: 4042877 (1977-08-01), Sieverin
patent: 4105122 (1978-08-01), Flood et al.

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