| 摘要 |
A disposable dispensing cartridge comprises a reservoir adapted to contain a solution to be dispensed; a chamber in fluidic communication with the reservoir through a first unidirectional valve. The chamber comprises an outlet portion with a second unidirectional valve allowing passage of the solution out of the chamber. The disposable cartridge is connectable via a second connecting portion to a pressurizing device. The pressurizing device is adapted to apply a reduced pressure within the chamber; drawing a predetermined volume of solution from the reservoir, through the first unidirectional valve, into the chamber; and to apply a raised pressure within the chamber, drawing the determined volume of solution out of the chamber, through the second unidirectional valve. The second connecting portion comprises a check valve being arranged to allow gas, but not the solution, to flow in and/or out of the chamber via the second connecting portion. The disposable cartridge is simple and inexpensive to manufacture.
|
