Ventilation – Having protecting air current – Including suction outlet
Reexamination Certificate
2005-03-02
2010-10-26
McAllister, Steven (Department: 3749)
Ventilation
Having protecting air current
Including suction outlet
Reexamination Certificate
active
07819729
ABSTRACT:
An air curtain doorway for preventing cross-filtration of air at a doorway between a relatively warm area and a relatively cool area has duct work and an air mover. The duct work includes a supply air duct and a return air duct at opposite sides of the doorway joined by an intermediate air duct at the top of the doorway. The intermediate air duct houses the air mover, which creates an air stream circulated through the duct work that blows an air curtain from the supply air duct to the return air duct. The return air duct has an enlarged collector chamber upstream of an adjustable return air inlet aperture into which the downstream end of the air curtain is drawn. The supply air outlet aperture is at the base of a nozzle that has an upper portion that directs the air curtain toward the warm side and a lower portion that directs the air curtain toward the cold side of the doorway.
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Applicant's Exhibit A, “flexalre barrier”, four-page brochure of Flexon, Leetsdale, PA, 1997, admitted prior art.
Applicant's Exhibit B, “Conditioned Air Curtain”, four-page brochure of HCR, Inc., Falls Church, VA, undated, admitted prior art.
Applicant's Exhibit C, “Frost-Free Airlok-Door”.sixteen-page instruction manual of HCR, Inc., Lewistown, MT, undated, admitted prior art.
Applicant's Exhibit D, “Frost-Free Freezer Doorways”, forty-page product bulletin of HCR, Inc., Lewistown, MT, undated, admitted prior art.
Applicant's Exhibit E, “Model DCAV Conditioned Air Vestibules”, twenty-four page instruction booklet of HCR, Inc., undated, Falls Church, VA, admitted prior art.
Applicant's Exhibit F, “The Problems of Frost, Fog, and Ice in Freezers: Part 1—The Cause”, five-page operations bulletin of HCR, Inc., Falls Church, VA, Aug. 1993, admitted prior art.
Applicant's Exhibit G, “The Problems of Frost, Fog, and Ice in Freezers: Part 2—The Solution”, five-page operations bulletin of HCR, Inc., Falls Church, VA, Sep. 1983, admitted prior art.
Endter Joseph M.
Rohrer Stephen R.
ASI Technologies, Inc.
McAllister Steven
Quarles & Brady LLP
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