Appeal No. 97-3030
Application No. 08/254,181
The invention is directed to electronic air fresheners;
more particularly, to electronically heated air fresheners
wherein a vaporizable scent material in the form of a
fragrance block is heated in order to motivate the escape of a
scent. The heating circuit comprises a porcelain enamel metal
substrate which has a layer of fused porcelain enamel bonded
to the metal substrate and a thick film, electrically
resistive heating element bonded directly to the fused
porcelain enamel coating. Thick film conductors are also
bonded to the fused porcelain enamel coating.
Representative independent claim 1 is reproduced as
follows:
1. An electrically heated air freshener for producing a scent
comprising:
i. a housing having a receptacle for supporting a
fragrance block, said fragrance block comprising a material
that volatilizes upon heating; and
ii. a porcelain enamel metal substrate adjacent to said
fragrance block, said porcelain enamel metal substrate
comprising a metal substrate having a porcelain enamel coating
bonded thereto, said porcelain enamel coating having bonded
thereto:
a. a resistance strip for generating heat for
volatilizing said fragrance block upon application of an
electrical current; and
2
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