Abstract: A multistage filter cartridge includes a generally circular outer filtering stage composed of a melt blown polypropylene material having an outer surface and an inner surface and an inner diameter and an outer diameter, and a generally circular inner filtering stage composed of carbon and a binder material forming a carbon block having an outer surface and an inner surface and an inner diameter and an outer diameter. A first void is disposed between the inner surface of the outer layer and the outer surface of the inner layer, and a second void within the inner surface of the carbon block, said voids being filled with granular, filtering material.

Abstract: A water filter is provided. The water filter includes a melt blown filter including a melt blown filter inlet. The melt blown filter inlet forms a water filter inlet. A carbon filter is in fluid communication with the melt blown filter. A thermoplastic polymer filter is in fluid communication with the carbon filter. The thermoplastic polymer filter includes a thermoplastic polymer filter outlet. The thermoplastic polymer filter outlet forms a water filter outlet.

Abstract: An enhanced liquid filter bag is disclosed. The enhancements to a liquid filter bag disclosed herein include the addition of an internal filter cartridge and the addition of a liquid impermeable liner material that directs the flow of liquid to a centrally located void in the internal filter cartridge.

Abstract: A carbon filter is disclosed. Such a carbon filter includes a carbon-based core having a central cavity, a layer of a polymer-based filter material surrounding the carbon-based core, and at least one end cap fixedly attached to the carbon-based core.

Abstract: A carbon filter is disclosed. Such a carbon filter includes a carbon-based core having a central cavity, a layer of a polymer-based filter material surrounding the carbon-based core, and at least one end cap fixedly attached to the carbon-based core.

Abstract: An enhanced liquid filter bag is disclosed. The enhancements to a liquid filter bag disclosed herein include the addition of an internal filter cartridge and the addition of a liquid impermeable liner material that directs the flow of liquid to a centrally located void in the internal filter cartridge.

Abstract: A tube of film material for enclosing food has a closure tie with a suspension loop, the enclosure tie including the knot lying in a recess in the pleated tip of the film material. The recess in which the tie is located is formed by softening the tube by heating, for example, with warm air, infrared radiation, ultrasonic means, by previously heating the tie filament, or by treating the film material with solvents or softening agents. Apparatus is disclosed for carrying out the process.