Pleated filter and a method for making the same

摘要: A filter may comprise a plurality of pleats, at least one pleat including pair legs and tip region. In some embodiments, thickness region point spaced about to four leg thicknesses from the end be less than or equal twice distance between corresponding points on opposing outer surfaces legs. pleated structure having pleats. have more layer pleats reformed other contacting inner surfaces. method making forming regions applying pressure also free bulbous regions. wherein each is An apparatus dies arranged reform pleat.