Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2007-10-12
2010-10-26
Kim, Ellen (Department: 2874)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
C347S086000, C347S092000
Reexamination Certificate
active
07819511
ABSTRACT:
The present invention relates to an apparatus (10) for regulating air pressure in an ink tank (14). The apparatus includes a vacuum pump (12) configured for providing a pressure below atmospheric pressure in the ink tank. A first regulating unit (16), a second regulating unit (18), and a third regulating unit (20) are disposed between the vacuum pump and the ink tank, and in communication with each other. The first regulating unit and the third regulating unit each include a pressure regulating valve and a buffer tank connected with the pressure regulating valve, and the second regulating unit includes a closed-loop pressure regulating valve (180) and a buffer tank (182) connected with the closed-loop pressure regulating valve.
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Cheng Chen-Hsing
Hung Tsung-Yu
Hon Hai Precision Industry Co. Ltd.
Kim Ellen
Knapp Jeffrey T.
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