Machines for automatically applying closure caps to containers; machines for monitoring automatic production of containers and closures for consumer, commercial, and industrial goods; machines inspecting automatic production of containers and closures for consumer, commercial, and industrial goods; machines for monitoring production quality of containers and closures for consumer, commercial, and industrial goods; machines for inspecting beverage and jar caps; machines for inspecting labels; machines for inspecting foil, plastic, and multi layer lid seals; machines for inspecting safety button caps; machines for inspecting two side labels; machines for inspecting shrink bands; mechanical discharging hoppers for accumulating and orienting metal closures for insertion into cappers before application onto jars; product diverters for mechanical discharging hoppers for accumulating and orienting metal closures for insertion into cappers before application onto jars; in-line cap dryers for machines for automatically applying closure caps to containers; self centering guide rails for mechanical discharging hoppers for accumulating and orienting metal closures for insertion into cappers before application onto jars; and replacement parts for the aforementioned goods