Inspection of the shell-border and the inner surface of the closures. The inspection is normally performed with the closures upward facing, with a top-view. The optic is a wide-angle lens, in order to enhance the typical defects on the border of the closure (missing material, folded border, deformations, ovality) and inside (“corrugated” closures, stain). This module can be installed either on a conveyor belt (with caps moving aligned, spaced and upward facing) or on a star-wheel.

Inspection of the Liner (seal) and/or the pourer assembled inside the closure. The inspection is normally performed with the closures upward facing, with a top-view. For liner inspection the typical defects are: missing material, liner not properly inserted, missing liner, upside-down liner (only for metal foil liners), contamination/dirty. For pourer the typical defects are: not proper assembling, missing one or more components, contaminations/dirty. This module can be installed either on a conveyor belt (with caps moving aligned, spaced and upward facing) or on a star-wheel.

Inspection of the Top external surface. Normally this inspection is performed with closures moving on a star-wheel, upward facing, while camera observes the top surface from the bottom, through a hole in the main plate of the machine (usually on the hole is installed a special glass, or closures are kept in the pockets with a vacuum system). Typical defects that can be detected with this unit are: dirty, contaminations, color variations, printing defects, logo centering.

Inspection of the external side surface of the closure. The acquisition unit uses six cameras, installed at 60° each other. The unit is installed on a conveyor belt, with closures moving aligned and spaced. Typical defects that can be detected with this unit are: dirty, contaminations, color variations, printing defects.