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US 8,075,720 B2Granted
Circumferentially pleated filter assembly and method of forming the same
Assignee3M Innovative Properties Company
InventorsBrian L. Fall, Thomas J. Hamlin, Mahesh Z. Patel, John L. Pulek, Aaron Spearin
Life of this patent
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Abstract
A method of forming a filter element is disclosed comprising the steps of preparing a plurality of upstanding pleats each having first and second pleat legs, wherein the first pleat leg of one pleat is joined to the second pleat leg of a preceding pleat by a medial pleat section; moving the upstanding pleats into an overlapped condition wherein each medial pleat section becomes part of the second leg of a preceding pleat; and forming the overlapped pleats into a cylindrical configuration.
Claims10
A method of forming a filter element comprising the steps of:
- a) preparing a plurality of upstanding pleats each having first and second pleat legs, wherein the first pleat leg of one pleat is joined to the second pleat leg of a preceding pleat by a medial pleat section;
- b) moving the upstanding pleats into an overlapped condition wherein each medial pleat section becomes part of the second leg of a preceding pleat;
- and
- c) forming the overlapped pleats into a cylindrical configuration.
1 more element
Dependencies are inferred from the claim text.