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US 4,161,283 AGranted
Article for the dispensing of volatiles
OwnerSy Hymaninventor
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OwnerSy Hymaninventor
Estimating the term…
An article for the slow release of volatilizable substances, such as deodorizers, insecticides, repellants and the like, the article being formed from opposed outer and inner wall members joined along their peripheral portions to define a central reservoir portion for receiving and confining a volatilizable substance. The outer wall member comprises a non-porous flexible polymeric sheet material which does not permit bulk flow, but allows molecular diffusion therethrough. The inner wall member comprises an impermeable barrier layer. Another barrier layer is releasably bonded to the outer wall and prevents escape of volatilizable substance until its removal at the time of desired use. In a further aspect, a strippable adhesive layer is bonded to the outer surface of the inner wall impermeable layer and removal of the strippable layer enables adhesive bonding of the article to environmental surfaces.
An article for the dispersion of a volatile substance to the surrounding atmosphere comprising opposed outer and inner wall members heat-sealed along their peripheral portions to define a substantially centrally disposed reservoir portion for containing a volatilizable liquid substance substantially filling said reservoir, said outer wall comprising a molecular diffusion polymer, a first barrier layer removably attached to and covering the outer surface thereof, said first barrier layer being substantially impervious to molecular diffusion, and said inner wall comprising a second barrier layer substantially impervious to molecular diffusion, and comprising a dissimilar polymer from the molecular diffusion polymer, whereby the removal of the first barrier layer from the outer wall permits dispersion of the volatilizable substance through the outer wall to the surrounding atmosphere.
An article for the dispersion of a volatile substance to the surrounding atmosphere comprising a layer of a molecular diffusion polymer and a layer substantially impervious to molecular diffusion, said layers being heat bonded to each other along their respective peripheral portions to form a reservoir portion for containing a liquid volatilizable substance, another layer substantially impervious to molecular diffusion overlying said molecular diffusion layer, whereby the liquid volatilizable substance may diffuse through the first said layer to the surrounding atmosphere.
Dependencies are inferred from the claim text.