| 摘要 |
A non-round unitary filter cartridge according to the present invention is provided having a unitary structure with pleated filter media formed securely about a perforated interior core. Opposite ends of the pleated filter media and perforated core are integrally formed with a bottom end cap and a flexible upper collar. The flexible upper collar is formed of a flexible molding compound which is deformable to pass through an opening in a tube sheet which retains the filter cartridge. The perforated core is oblong in configuration, having first and second parallel major side surfaces and first and second rounded outer ends. The flexible collar is elliptical in cross-section and has an outwardly facing groove located at the top of the barrel portion for sealably receiving a periphery of the tube sheet aperture. The dimensions of the elliptically shaped groove are slightly greater than the associated aperture in the tube sheet, which preferably has first and second parallel major sides and first and second rounded outer ends. The flexible upper collar is integrally molded and has an inner wall defining an opening, or port. The filter cartridge, and namely the flexible collar, is compression fit into the opening into the tube sheet, thereby effecting a dust tight seal.
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