Device for detecting crizzle in the mouth and thread of glass containers

A check detector in the neck and finished portion of a bottle, comprising:

• a rotator for rotating an inspection bottle on the inspection position;
• a plurality of emitters and a plurality of receivers arranged on an approximately hemispherical fixture arranged around the neck and finished portions of said inspection bottle as a center;
• means for obtaining N×M data per single scanning against said inspection bottle, wherein N is a number of emitters, and M is a number of receivers;
• means for assorting the N×M data obtained;
• means for differentiating the assorted N×M data and creating differential output figures;
• means for judging whether or not the differential output figures exceed threshold figures;
• means for automatically collecting data of a good bottle of all or partial channels of N×M in each periodic time or in each passing number of glass bottles against the threshold figures initially registered and decided as a good bottle;
• and
• means for automatically executing steps of 1) renewing the threshold figures by setting new threshold figures which are produced by adding certain amount of margin figures on the differential figures of the collected data, 2) against the new threshold figures, continuously repeating an action of automatically collecting the data of the good bottle of all or partial channels of N×M in each periodic time or in each passing number of glass bottles and adding the certain amount of margin figures on the differential figures.