Abstract: A filtering unit for a bus, the unit comprising one outer housing of a size to fit between the row of seats in the bus and a forwardly facing wall of a bus lavatory behind the seats, the housing having air inlet and air outlet openings for communication with ducts opening in upper and lower portions of the lavatory. The housing comprises a main housing body with an interior horizontal passageway of consistent cross sectional shape extending parallel to the rear of the outer housing, the main housing body having a horizontally facing opening at the outer end thereof which is covered by a panel which is movable to expose said opening, and a drawer unit slidable into or removable from said passageway through said opening. The drawer contains at least an air filter for removing at least lavatory odor-causing gaseous and particle materials from the air stream passing therethrough and an air circulating fan and drive motor therefor.

Abstract: Sterilizing apparatus preferably comprises an enclosure surrounding the top, bottom and sides of a central sterilizing enclosure space and adjacent inlet and outlet enclosure spaces opening horizontally to the exterior of the enclosure at the opposite ends thereof. A continuously moving conveyor carries open-topped containers to be sterilized horizontally through the inlet, sterilizing and outlet enclosure spaces of the enclosure. The sterilizing enclosure space is divided by partition walls into an upper compartment which opens at the bottom thereof into a lower compartment immediately above the path of travel of the open tops of the containers passing through the lower compartment of the sterilizing enclosure space.