Canning 101
Become an expert in canning terminology
Internal Pressure
Pressure inside a carbonated or nitrogen-dosed can.
Lifter (Can Lifter / Platform
Raises the can into the seaming position.
Necking
The manufacturing process that shapes the top of the can by reducing its diameter. This is done both to save material and increase the integrity and strength of the can.
Non-Destructive Testing (NDT)
Inspection without destroying the can e.g., X-ray seam inspection.
As opposed to destructive testing methods, NDT evaluates the double seam with an X-ray resulting in highly accurate results and eliminates the need for cutting the can open, hence saving both material and product.
Overlap
The area where the body and cover hooks interlock. A critical measurement for seam integrity.
Overpressure / Counter pressure Filling
Sometimes referred to as Isobaric Filling. By maintaining equal pressure between the tank and the container (bottle or can) in the filling process, leakage of carbon dioxide can be prevented. This is generally done by pressurising the container so that it matches the existing pressure of the liquid in the tank. When filling the container the liquid is poured in, simultaneously pushing out the CO2 of the container and the counter pressure that it creates keeps the foaming and leakage to a minimal.