Evaporative dispenser

A method of emitting vaporized material into the ambient at a controlled, substantially uniform rate from a reservoir containing an exposed liquid quantity of said material, said reservoir having an apertured lid substantially confining the air space above said liquid to cause the air above said liquid to remain substantially saturated with said material, said quantity being replenished from a replaceable, air-tight supply container of fresh liquid material removably supported above and in close proximity to said reservoir, thereby forming a narrow gap between a portion of the body of said container and said lid, comprising the steps of:

• producing and directing a continuous forced flow of ambient air through said gap close to but substantially not in contact with the surface of the liquid in the reservoir to draw out said substantially saturated air from beneath said lid, effect vaporization of said liquid from said surface and entrain the vaporized material in said forced air flow;
• and
• continually and automatically replenishing material evaporated from said reservoir by discharging liquid material directly onto the surface of the liquid in the reservoir from said container to renew said surface and prevent stagnation thereof.