Abstract: The present invention provides a passive deodorization device housing suitable for use in a portable toilet enclosure having a vent tube for venting odors from a holding tank. The deodorization device housing includes an engagement surface for engaging a vent tube outer surface, and an aperture. Two fingers extend from the aperture into the vent tube. A retention member mounted on the fingers engage a vent tube inner surface and clamp the vent tube wall between the housing and retention member. A deodorizing element slipped into the aperture between the fingers can deodorize the malodorous vapors associated with the toilet.

Abstract: An air treatment system has a removable and replaceable cartridge, the cartridge having a cylindrical plastic canister, and having a liquid-permeable vaporizing element disposed in the canister. The canister is located on one side in a cradle inside a housing where air flow is controlled between inlet and outlet ports by a pivoting frame member. A slider is moved up and down outside the housing to simultaneously move a pair of arms inside the housing into closed, partially open or fully open positions relative to the inlet and outlet ports. The canister has ports of special configuration and a baffle is placed in the canister to assist radial air flow and assure that air flows over the coiled air vaporizing element.

Abstract: A dispensing apparatus comprising a container defining a chamber adapted to contain a substance to be dispensed into the atmosphere, the container including a first surface having therein a first opening communicating with the chamber, a plate member including a second surface and being secured to the container with the second surface facing and spaced from the first surface, and a valve plate including a second opening and being trapped between the first and second surfaces in sliding relation thereto for movement between a first position wherein the valve plate closes the first opening and a second position wherein the second opening is aligned with the first opening to permit the chamber to communicate with the atmosphere.

Abstract: Disclosed herein is a container fabricated of plastic and including a tubular sidewall defining a hollow interior and having upper and lower margins, an elongated flat section having parallel side edges extending substantially between the upper and lower margins, and an arcuate section extending from and between the side edges of the flat section, together with upper and lower closure members extending in telescopic relation over the sidewall upper and lower margins and closing the upper and lower ends of the sidewall, which closure members are rotatable relative to the sidewall between arcuately spaced first and second positions, and valve means including respective apertures in the sidewall upper and lower margins and in the closure members, which apertures are substantially in register, and thereby open, when the closure members are in the first position and which apertures are substantially out of register, and thereby closed, when the closure members are in the second position.

Abstract: Disclosed herein is an air freshening device comprising an upright housing including, adjacent the bottom thereof, an air inlet and, adjacent the top thereof, an air discharge, a fan in said housing intermediate the air inlet and the air discharge means for causing air flow through the housing, a filter, structure for removably supporting the filter in the housing intermediate the air inlet and the fan in the path of the totality of the air flow through the housing, a sleeve assembly within the housing for introducing into the air flow downstream of the filter a substance to be dispensed, which sleeve assembly is operable to releasably support the filter and includes relatively rotatable inner and outer sleeves, one of the sleeves defining an interior chamber, openings in the sleeves for affording valved access to the interior chamber in response to relative rotation between the sleeves, a coupling for releasably connecting the sleeve assembly and the housing, and a package of the substance to be dispensed lo

Abstract: An atmospheric control apparatus for use in a forced air ventilation duct is described having an inlet means to receive air from the inside of said duct attached to a replaceable deodorant cartridge, which is itself attached to outlet means terminating within the duct downstream of the inlet to supply an atmospheric control substance such as an odorant or deodorant into the air stream. Air flow through the cartridge is accomplished by the differential pressures present at the inlet and outlet means in the air duct.

Abstract: A dispenser comprising a rectangular housing defining an air inlet chamber between the first partition and the top wall of the housing, a valved air inlet communicating with the air inlet chamber, a second partition defining an air outlet chamber between the second partition and the bottom wall of the housing and a central chamber between the first and second partitions, a valved air outlet communicating with the air outlet chamber, apertures in the first and second partitions for affording air flow from the air inlet chamber, at least one tray member, a support on the end walls for horizontally supporting the tray member in the central chamber and for facilitating at least partial withdrawal of the tray member, a holder on the tray member for removably holding a plurality of relatively thin rectangular envelopes which contain a substance to be dispensed and which are arranged in parallel vertical relation to each other to permit air flow past the envelopes from the air inlet chamber to the air outlet chamber

Abstract: A central source of odor neutralizing vapor fed into a floating or partially suspended distribution network is used to control odors from the surface of odiferous ponds having large surface areas.

Abstract: Disclosed herein is a generally flat envelope or package for controllably dispensing into the atmosphere a liquid substance which is normally liquid and vaporizable under atmospheric temperature and pressure conditions. The package includes two sheets which are made of flexible material permeable to the liquid substance and are peripherally sealed to each other in opposing relation to form a hermetically sealed chamber encapsulating the liquid substance.

Abstract: Disclosed herein is a dispenser comprising a housing having opposed first and second end walls each having therein respective parts rupturable from the end walls to provide respective first and second apertures, a first valve member mounted on the housing for movement relative to the first end wall between positions operative, when the first end wall is ruptured, to open and close the first aperture, a second valve member mounted on the housing for movement relative to the second end wall between positions operative, when the second end wall is ruptured, to open and close the second aperture, a plurality of spaced legs extending integrally from the first valve member in a direction extending away from the housing and adapted to support the housing in upright position on a supporting surface, to facilitate manual movement of the first valve member, and to afford flow of air between the legs and through the apertures and the housing after rupture of the end walls and when the valve members are in the open posit