Abstract: A device for crizzle detection, provided with a means for rotating a glass container placed at an inspection position, a data collecting means which has N light projectors and M light receivers arranged on a generally semispherical mointing jig around the mouth or thread of the glass container and which is adapted to collect N×M pieces of data for each scan over the glass container, a means for rearranging the collected data, and a means for differentiating the rearranged data. At regular intervals or each time a predetermined number of glass containers have passed, data on acceptable containers for all or part of N×M channels are automatically collected to update the threshold values initially registered for acceptable containers based on the collected data. Thus, the rate of detection of crizzled glass containers in not lowered.

Abstract: A check detector is provided for the neck and finished portions of a bottle which comprises a rotating means which is capable of rotating an inspection bottle; a plurality of emitters and a plurality of receivers arranged on an approximately hemispherical fixture arranged around the neck and finished portions of an inspected bottle as a center; means for obtaining N.times.M data per single scan against the inspected bottle, wherein N is a number of emitters, and M is a number of receivers; means for assorting the data obtained; and means for differentiating the data. Setting of job change depending on bottle types can be conducted automatically, and detecting checks in the neck and finished portions of a bottle can be conducted overall with no relation to the portion and type of defects. Detecting of a bubble, a contaminant, a chipped and unfilled thread and deformation which are known defects in the neck and finished portions of a bottle can be achieved.

Abstract: An inspection method for determining the presence and type of defects in the lip of a bottle. A CCD sensor and a light source are arranged at one side of the bottle above the lip, and additional light sources are arranged at the other side of the bottle above the lip. The presence and type of defects are determined by observing the profile of the image signal output by the CCD when light is reflected from the lip of the bottle. Defective bottles produce a wider than normal signal profile, two or more peaks, an interrupted profile or a weak arc image signal. The form of the image signal is indicative of the type of defect in the lip of the bottle.