Position indicator device for conveyed object

Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Separating means

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209510, 209938, 209942, B07C 500

Patent

active

049444115

ABSTRACT:
A position indicator device for conveyed objects having a checking area disposed in a conveying passage where a plurality of objects are unidirectionally conveyed while being aligned in a conveying direction and a direction normal thereto; an indicator manually movable to a position of a target object within the checking area for indicating a position of the same; and an indicator-position detector for detecting a two-dimensional position of the indicator within the checking area. The checking area includes a plurality of beam emitters operable together to project beams of light in a grating form within the area and a plurality of beam receivers each operable to receive a light beam from a corresponding emitter. The indicator acts as a beam-blocking member for blocking the beam transmission between the emitter and receiver. The indicator-position detector detects a position within the checking area of the indicator based on a position information of the receiver blocked by the indicator.

REFERENCES:
patent: 4184598 (1980-01-01), Cowlin et al.
patent: 4410091 (1983-10-01), Cowlin et al.
patent: 4805778 (1989-02-01), Nambu

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