Dispensing – Automatic control – Material level control
Reexamination Certificate
2005-07-26
2010-10-12
Ngo, Lien T (Department: 3754)
Dispensing
Automatic control
Material level control
C222S424000, C366S136000
Reexamination Certificate
active
07810674
ABSTRACT:
A dispense apparatus and system for dispensing suspensions or emulsions. The system ensures uniformity of distribution of the dispersed phase within the continuous-phase liquid by moving the fluid through the dispense cartridge, such as with a continuous or pulsating flow. In one embodiment, peristaltic pumps are positioned upstream and downstream of the dispense cartridge, in fluid communication with and forming a single loop with a fluid source. Circulation between the fluid source and the dispense cartridge is maintained. In a second embodiment, a pump circulates fluid into and out of the dispense cartridge and is also in fluid communication with a fluid source such as with a pinch valve to allow proper filling of the dispense cartridge from the fluid source. In a third embodiment, a reversing pump is placed between the dispense cartridge and fluid source to continually or continuously pump fluid into and out of the dispense cartridge.
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Belongia Brett M.
Saunders Robert C.
Millipore Corporation
Ngo Lien T
Nields, Lemack & Frame, LLC
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