Dust collecting filter cartridge and attachment structure for suspending same from baghouse tube sheet

Claim 1

A dust filter baghouse comprising; A. A baghouse tube sheet having a plurality of openings therein; B. A plurality of small-diameter filter cartridges, each filter cartridge comprising a cylindrical perforated sleeve, an annular pleated filter media which encircules said sleeve, and a cap secured to the upper end of said filter media, C. Attachment structure suspending each of said filter cartridges from said baghouse tube sheet in registry with one of said openings, said attachment structure comprising: a. a collar having an annular upper horizontal shoulder portion, an enlarged rim portion, and an annular portion depending downwardly from said rim portion; b. means securing said shoulder portion of said collar to said cap; c. an annular double-beaded cuff, said cuff having an upper bead, a lower bead and an outer annular groove between said upper and lower beads receiving the edge of one of said openings in the tube sheet, said upper bead of said cuff being positioned to rest on and be supported by said tube sheet, said cuff including spring means so as to be spring biased in an outward direction toward said edge of said opening in said tube sheet; thereby to effect a dust-tight seal between said opening edge and said cuff; d. said rim of said collar resting on and be supported by said cuff, e. said depending portion of said collar being press fitted into said cuff to effect a dust-tight seal between said depending collar portion and said cuff.