TAPERED SEPARATOR FOR PLEATED FILTER AND APPARATUS FOR MAKING THE SAME

摘要

A tapered separator for a pleated filter formed from a blank of foldable sheet material having one portion folded in zigzag formation to present first fold increments of a first selected height and the remaining portion folded in zigzag fashion to present second fold increments in substantially end-to-end relation with said first fold increments and of a second selected height different from the height of said first fold increments to thereby provide a tapered configuration to the separator.