Appeal No. 1999-1784
Application 08/710,853
As to the Berlant patent, we find that it teaches an air
curtain having a sanitized air output to avoid contamination
via the spread of airborne bacteria. As depicted in Fig. 2,
the air curtain device includes a housing 16 supporting an air
inlet guide 54 and a screen assembly 68d including a filter
element 78. An elongated tubular ultraviolet light bulb 84 is
secured within the air inlet guide. As explained by the
patentee (column 3, lines 4 through 9),
The inside surfaces of the walls 56 and 58
of the guide are preferably coated with a
reflective substance, such as aluminum
paint of the type sold under the trademark
Alzak, which serves to reflect ultraviolet
rays and to intensify and control
radiation.
Additionally, it is noted that the filter element of Berlant
is coated or treated with germicidal or bacteriostatic
substances to protect the interior of the device from
contamination when the ultraviolet light source is not in use.
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