|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||210/445 ; 210/450 ; 210/451 ; 210/4935|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 16 인용 특허 : 1|
A filter assembly (10) includes a frame (10 and 12) and means (10, 32, 34, 36, 38, 44, 48, and 50) releasably retaining a replaceable pleated filter element (14) therein. The edges of the pleats (68) of the filter element (14) are folded over diagonal fold lines (70) and tucked between adjacent pleats in a manner which provides control expansibility and substantially even pleat spacing upon expansion after storage in collapsed condition.
A filter assembly, comprising: a pleated filter element having opposite sides; said filter element including a sheet of filter media folded in alternate directions about longitudinally spaced-apart transverse fold lines to form accordion pleats extending between opposite edges and opposite ends of the sheet, the ends of at least some of the pleats on the same side of said filter element being folded inwardly about diagonal fold lines extending at predetermined angles between points spaced laterally inward along alternate transverse fold lines and points ...