Coating apparatus – Immersion or work-confined pool type – Capillary passages or barometric column feed
Patent
1997-04-25
1999-11-02
Edwards, Laura
Coating apparatus
Immersion or work-confined pool type
Capillary passages or barometric column feed
118410, 118411, 118412, B05C 500
Patent
active
059762527
ABSTRACT:
A method and apparatus for depositing precisely metered quantities of an emulsion on a surface are disclosed. The method and apparatus are particularly useful for assembly of reversible clinical thermometers. The apparatus involves (a) at least one cartridge having a volume containing the emulsion composition; (b) at least one piston associated with each cartridge for collapsing the volume under a controlled pressure; (c) at least one tubular needle for receiving a flow of emulsion composition from each cartridge; (d) a fluid connection between each tubular needle and each cartridge for delivering the emulsion composition from each cartridge to each needle; and (e) a valve for each fluid connection. The method for depositing precisely metered quantities of an emulsion on a surface, comprising the steps of (a) pressuring a cartridge having a volume containing the emulsion composition to cause flow of the composition from the cartridge; (b) controlling the pace of flow of the composition at a valve; (c) delivering the composition from the valve through a fluid connection to tubular needle; and (d) contacting a dollop of the composition protruding from an open end of the needle on to the surface.
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3M Innovative Properties Company
Edwards Laura
Griswold Gary L.
Hohenshell Jeffrey J.
Hornickel John H.
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