METHOD AND APPARATUS FOR EXAMINING LIQUID FILLED CONTAINERS

摘要

A container which is at least partially filled with a liquid is centrifuged while its longitudinal axis is maintained substantially perpendicular to its axis of rotation thereby causing impurities which may be present in the liquid to move to the end of the container farthest from the axis of rotation while the air bubbles in the liquid collect at the end of the container nearest to the axis of rotation. The container is then moved diametrically past the axis of rotation causing the air to move to the opposite end of the container. The centrifuging of the container continues causing any impurities which may be present to be transferred from the end of the container in which they have been collected to the opposite end. The presence or absence of these impurities is sensed by a photoelectric device during this transfer.