Metal constituent element e.g. return spring, for fluid product distributor, has coating surface that is coating barrier to avoid contact between element and fluid product, where coating surface is highly resistant to product

摘要

The element e.g. return spring (6), has a coating surface that is a coating barrier to avoid contact between the element and a fluid product such as perfume, where the element is made up of polymer or metal material. The coating surface is made up of inert polymer material such as Parylene(RTM: Polyparaxylene), and is highly resistant to the fluid product, and cosmetic and pharmaceutics products. An independent claim is also included for a method for coating a surface of a constituent element.