Verification system for detecting the presence and absence of an

Details Verification system for detecting the presence and absence of an Verification system for detecting the presence and absence of an

1990-12-27

1992-03-24

Coan, James F.

Package making

With means responsive to a sensed condition

Of individual contents or group feed or delivery

53495, 493 9, B65B 5710

Patent

active

050976532

ABSTRACT:
A verification system for detecting the presence and absence of an object includes a verification station. A preselected number of objects is delivered to the verification station with each object disposed at a selected position. A pneumatic comparator is located at each selected position. Each pneumatic comparator comprises a head directed toward its corresponding selected position. The head includes an exit port and an entry port whereby air may be discharged through the exit port and directed toward the selected position. If an object is located at the selected position the air is reflected back into the entry port where it is sensed to indicate the presence of the object.

REFERENCES:
patent: 3133481 (1964-05-01), McCormick et al.
patent: 4266674 (1981-05-01), Bell et al.
patent: 4577451 (1986-03-01), Salicini
patent: 4680919 (1987-07-01), Hirama et al.
patent: 4856262 (1989-08-01), Uithoven

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