CHEMICAL VAPOUR DISPENSER

摘要

The present application discloses a method of dispensing a chemical vapour which comprises the steps of: providing a container bottle for the source of vapour having a screw-on cap, the cap having seal means there within to seal against the bottle, the bottle and cap having retaining means thereon to hold the cap captive on the bottle at least during an initial stage of unscrewing of the cap from the bottle to allow a limited passageway for vapour to be formed between the bottle and the seal and between the co-operatively engaging screw threads of the cap and the bottle so that when the cap is unscrewed within its freedom of captive movement, chemical vapour from within the bottle may be released at a suitable slow rate; and deploying the bottle for use with the cap so-unscrewed.