Abstract: Apparatus for detecting checks in the finish of a translucent container that includes a first optical subassembly in which a first light source directs light energy onto the container finish as it rotates and a first light sensor receives portions of the first light energy reflected from horizontal checks in the container finish, and second and third optical subassemblies include respective second and third light sources and associated second and third sensors for directing light energy onto the container finish and receiving energy reflected from vertical checks in the container finish. Each optical subassembly includes an associated mounting plate, by means of which the optical subassemblies are mounted at an inspection station with the first light source and sensor disposed in a vertical plane, and the second and third light sources and sensors disposed in opposed mirror-image arrays on opposite sides of the vertical plane.

Abstract: Apparatus for reading a mold-identifying code in the form of a plurality of surface irregularities extending in an arcuate array around the container heal concentrically with the container axis. A starwheel conveyor sequentially moves a series of containers in an arcuate path about a conveyor axis to and through a reading station. A belt positioned adjacent to the conveyor periphery engages containers at the reading station and is driven so as to rotate the containers about their central axes. A light source is imaged at the conveyor axis through container heel. A scanning mirror is positioned to receive an image of the light source transmitted through the container heel and to reflect such image onto a camera. The scanning mirror is driven as a function of conveyor rotation so as to follow a container traveling through the reading station and reflect onto the camera an image of that circumferential portion of the illuminated container heel closest to the conveyor axis.