Conditioning device for deodorising and/or odourising air

Claim 1

A disposable conditioning pack for use in a ventilating apparatus of a sanitary manufacture such as a toilet bowl or bedpan to condition air, said pack comprising an outer perforated casing, an inner perforated casing positioned wholly within the outer casing and forming an annular container surrounding a central air passage, a battery and an air-permeable substance that alters the odour of air passing therethrough positioned in the annular container formed between the two casings, leads extending from the battery out of one end of the casing to terminals positioned outside the casing for connection to an air displacement means for displacing air to be conditioned through the substance, the central air passage being open at the end from which the leads extend and closed at the other end, the amount of said air-permeable substance being such that, when the battery is exhausted, the odour-altering property of said substance is substantially exhausted as well.