| 摘要 |
<p>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 a tubular needle; and (d) contacting a dollop of the composition protruding from an open end of the needle on to the surface.</p> |
