Container inspecting apparatus with a light shielding member sha

Details Container inspecting apparatus with a light shielding member sha Container inspecting apparatus with a light shielding member sha

1989-02-07

1990-12-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237R, 356240, G01N 904, G01N 2116

Patent

active

049755684

ABSTRACT:
An inspecting apparatus includes an illuminator, a light sensor positioned on one side of the path of movement of containers opposite to the illuminator capable of receiving rays of light which have passed through the container, rays of light reflected fro the container and rays of light travelling straight from the illuminator towards the light sensor within a predetermined region exteriorly of the container, a detector for analyzing the rays of light received by the light sensor, and a light absorbing or shielding member positioned diagonally and to the side of the container as viewed in a direction from the light sensor towards the illuminator. The light absorbing or shielding member shields rays of light reflecting from the surfaces of each of opposite wall portions of the container. Thus, a line of shade corresponding to the contour of the container can be formed on the side of the light sensor for accentuating the boundary between the container, illuminated by the rays of light from the illuminator, and a predetermined region defined exteriorly of the ocntainer by the rays of light travelling striaght towards the light sensor.

REFERENCES:
patent: 3029349 (1962-04-01), Schell
patent: 3411009 (1968-11-01), Ford et al.
patent: 3963348 (1976-06-01), Nakatani et al.
patent: 4079416 (1978-03-01), Faani et al.
patent: 4108762 (1978-08-01), Babunovic et al.
patent: 4676650 (1987-06-01), Bjorndal et al.

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