Abstract: A bag house (10) is composed of a plurality of filter bags (44) each engaged over the substantially open support frame (46). A solid band (98) defines a lower edge of the support frame (46). One or more elastic seals (90) are rolled over the lower end (106) of the bag (44) which surrounds the band (98). The assembled seals (90), filter bag (44) and frame (46) are then simply inserted downwardly into a circular receiving collar (40) surrounding an opening (38) through which flows gas laden with particulate matter. The particulate matter is collected by the filter bag (44) while the filtered air is allowed to flow through the air previous bag.

Abstract: An intermittent drive (10) for intermittently advancing a cleaning head (50) for sequential cleaning of filter bags (44) in a bag house (12). The intermittent drive includes a ratchet wheel (80) secured to a central shaft (74) on which the cleaning head is radially mounted. A drive plate (90) in proximity to the ratchet wheel is continuously rotated by a drive motor (83) about a drive axis (88). An elongated drive arm (94) has a base end portion (100) pinned to the upper surface (92) of the drive plate at a point radially offset from the drive axis. The drive arm (94) also has a distal end portion (102) that is engageable with the teeth (82) of the ratchet wheel. The bottom surface (98) of the drive arm frictionally contacts the upper surface of drive plate to urge the drive arm into engagement with the ratchet wheel teeth.