Air filters
AssigneeEngineering Components Limited
InventorRoss B. Barrington
Life of this patent
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Abstract
A pleated paper filter element has the configuration of the frustrum of a cone with the pleats extending lengthwise of the sloping wall of the cone and has pleat separation dimples embossed into the paper from which the element is made, the height of said dimples being graduated lengthwise of the element so as to provide controlled pleat separation over at least most of the length of the element.
Claims5
A paper filter frusto-conical element having a frusto-conical sloping wall with pleats extending lengthwise thereof, said pleats including dimples embossed into the paper from which the pleat is formed and arranged to abut an adjacent pleat for control of separation of adjacent pleats, the height of said dimples situated at positions spaced along said sloping wall being graduated lengthwise of the element so as to provide controlled pleat separation over at least most of the length of the filter element.
Dependencies are inferred from the claim text.