Conical filter

A filter having flow passing from upstream to downstream through the filter, comprising:

• a cylindrical filter housing including an upstream end portion of decreased diameter;
• filter media comprising a plurality of flutes, each flute defining fluted compartments extending in a longitudinal direction, wherein one end of each compartment is closed, and wherein the closed ends of the compartments are on alternating opposite ends;
• wherein the filter media is coiled in a spiralling configuration about a center portion, forming an upstream face and a downstream face, wherein the coil of filter media includes an outer edge forming a seal with the housing;
• and wherein a center portion of one face of the coil extends longitudinally in a substantially conical configuration.

A method of making a filter element, comprising the steps of:

• providing a strip of fluted filter media having a plurality of fluted compartments formed therein;
• coiling the filter media about a mandrel;
• sealing adjacent layers of the coil;
• and,
• extruding a center portion axially to form a conical filter face.

A method of making a filter element, comprising the steps of:

• providing a strip of fluted filter media having a plurality of fluted compartments formed therein;
• coiling the filter media about a mandrel;
• sealing adjacent layers of the coil;
• and,
• wherein the mandrel and strip of fluted filter material move axially relative to one another, thereby forming a conical filter face.

A method of making a filter element, comprising steps of:

• providing a strip of fluted filter media having a plurality of fluted compartments formed therein;
• coiling the filter media;
• sealing adjacent layers of the coil;
• and,
• extruding a center portion axially to form a conical filter face.

A method of making a filter element, comprising steps of:

• providing a strip of fluted filter media having a plurality of fluted compartments formed therein;
• coiling the filter media into a spiral;
• sealing adjacent layers of the coil;
• and
• wherein the spiral and strip of fluted filter material move axially relative to one another, thereby forming a conical filter face.