BLISTER PACKAGING MACHINERY shri ram packaging Blister packaging machines seal products in a cavity, usually with a paper backing or aluminum or film seal. These blister packs can be used for just about any product, but are common packages for small consumer goods, foods and pharmaceuticals. Most blister packaging machines use heat and pressure via a die to form the cavity or pocket from a roll or sheet of plastic. But, in recent years, improvements in cold forming—specifically allowing steeper depth/angles during forming, which minimizes the amount of material used for each cavity—have helped this technology increase market share.