The beverage outlet channel formed in the body portion and the compartment containing the beverage ingredients communicate in such a manner that, in use, the compartment and the beverage outlet channel co-operate to act as a filter during the preparation of a beverage from the package. This can be achieved in a variety of ways. For example, when the beverage packaging lines are formed in a flange which surrounds or at least partially surrounds the compartment containing the beverage ingredients, then the top portion of the package may be sealed not only to the body portion adjacent the periphery of the flange, but also at various points along the edge of the outlet channel which communicates with the said compartment. similarly, when the beverage outlet channel is formed along at least a part of the periphery of the compartment containing the beverage ingredients, the top portion of the package may be sealed to the body portion not only adjacent the periphery thereof, but also at various points along the edge of the outlet channel which communicates with the said compartment, for example by making appropriate spot welds of the top portion of the package package to this edge. The seals along the edge of the outlet channel may be formed by providing castellations in the edge to which the top portion can readily be sealed. In this manner, a plurality of very narrow channels or slots are provided connecting the compartment containing the beverage ingredients to the beverage outlet channel, thereby acting as a filter. It will be understood that the channels or slots should be of a size such that the majority of the roast and ground coffee particles are retained in the coffee bed. This will generally be achieved with castellation 0.2 to 0.5 millimetres high, depending upon the particular particle size of the coffee contained in the beverage packaging machine .

Food packaging provides barrier protection to not only keep the product fresh, but also safe. Some products, for example, contain desiccants or oxygen absorbers to help extend shelf life. Modified atmospheres or controlled atmospheres are also maintained in some food packages. The importance of food packaging essentially creates a fake piece of armor that prevents harmful bacteria or other diseases from corrupting the food. Some products, like meat, may not even be removed from their original packaging but will still go bad because they were not kept in the correct temperature or environment. It's important to understand where to store the product not only before the packaging is opened, but also after it's opened because some types of foods have different needs.

Several materials are used either alone or in combination with other materials to provide proper food packaging. Aseptic processings help protect whole eggs while cartons provide protection for a batch of eggs. Plastic trays may protect fish or meats in combination with plastic wrap. Bags preserve and protect chips, crackers, and even salads while cans package soup, fruit and vegetables.

Did you know food packaging is a $110 billion per year industry? Food packaging is the third-largest industry in the United States. An estimated 350 billion packages exist on U.S. store shelves alone. While most types of packaging are necessary to provide proper health and protection for food products, many environmentalists are attempting to find ways to save on paper, plastic and other materials used for food packaging. Consumers may do their part by recycling packaging products (such as aluminum, glass and plastic) instead of throwing them in the trash.
 
 
source:townhall|beverage packaging line