Regulation of back pressure within an ink reservoir

Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means

Reexamination Certificate

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Reexamination Certificate

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07040743

ABSTRACT:
Apparatus and methods for regulating back pressure within an ink reservoir for use in printing systems. Back pressure is regulated using a column of liquid within a trap contained in the ink reservoir. The trap is vented on one side to ambient pressure and to the other side within the body of the ink reservoir.

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