초록 ▼

Filter assemblies are disclosed that include a pleated web in which the pleats are connected to each other to provide support for the filter media during use. The interconnected pleats preferably form an array of openings facing the upstream side of the filter assembly when subjected to fluid pressu

Filter assemblies are disclosed that include a pleated web in which the pleats are connected to each other to provide support for the filter media during use. The interconnected pleats preferably form an array of openings facing the upstream side of the filter assembly when subjected to fluid pressure during use. In addition, the preferred filter media also includes an array of pockets located behind each of the points at which the pleats are connected. By connecting the pleats to form arrays of openings and pockets during use, the filter assemblies provide a structure that deforms in a predetermined, acceptable manner without the need for external support structure to support the pleats.

대표청구항 ▼

[ What is claimed is:] [1.] A filter assembly comprising:a substantially rigid frame defining an opening, the frame having an upstream side and a downstream side;filter media extending across the opening, the filter media having an upstream side and a downstream side; anda plurality of pleats formed

[ What is claimed is:] [1.] A filter assembly comprising:a substantially rigid frame defining an opening, the frame having an upstream side and a downstream side;filter media extending across the opening, the filter media having an upstream side and a downstream side; anda plurality of pleats formed in the filter media, each pleat including a leading edge defined by a common fold line on the upstream side of the filter media and an upper panel and a lower panel, the upper and lower panels being separated by the common fold line;wherein first and second pleats in each group of four successive adjacent pleats are connected at a plurality of first connection points at spaced intervals along the first and second pleats,and further wherein the second and third pleats in the group of four successive pleats are connected to each other at second connection points at spaced intervals along the second and third pleats, the second connection points being offset along the pleats from the first connection points.