Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-11-26
1992-08-04
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356240, G06M 700
Patent
active
051361574
ABSTRACT:
A conveyor (12) moves the hollow bodies (18) over a circular path through an inspection region (20) in which the hollow bodies (18) are homogeneously illuminated by an illumination device (16). The light issuing from the hollow bodies (18) passes via a group (34) of four mirrors (34a-34d) and a deflecting mirror (36) to a matrix camera or line scanning camera (30). The mirrors (34a-32d) are plane mirrors which are inclined at an angle in relation to one another. The hollow bodies (18) execute one complete revolution about their longitudinal axis while passing through the inspection region (20). Therefore, the group (34) of four mirrors views a quarter of the circumference of the hollow bodies each time in succession. The inspection apparatus is particularly suitable for inspecting the threaded region of bottles and has the advantage that is does not need any moving parts.
REFERENCES:
patent: 3942001 (1976-03-01), O'Connor
patent: 4620090 (1986-10-01), Ducloux
patent: 4636635 (1987-01-01), Kronseder
patent: 4855608 (1989-08-01), Peterson, II
Agerskov Carsten
Apter Robert
Jacobi Ulrik
Pau Louis-Francais
Sloth Henrik
Elpatronic AG
Le Que T.
Nelms David C.
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