CoEx Master™ Co-Extrusion Systems Home › Customer services › Upgrades › CoEx Master™ Co-Extrusion Systems Baker Perkins continuously develops equipment to improve performance and reduce cost of ownership. Many developments are available as upgrades for existing machinery; they address problems such as insufficient capacity, poor reliability and outdated hygiene standards. Original machine performance can be exceeded, and service life given a worthwhile extension. Upgrades available for Baker Perkins’ CoEx Master™ co-extrusion systems include: Crimping Rolls Alternative sets of crimping rolls can be fitted to widen the product range. Air Injection System This will extend the product range. It enables production of filled tubes with hollow centres, or gives a lighter texture to the cream filling through additional aeration.