Hydrophobic venting of free liquid ink reservoir pen

Details Hydrophobic venting of free liquid ink reservoir pen Hydrophobic venting of free liquid ink reservoir pen

B - Operations, Transporting

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B43K 1/00 (2006.01) B43K 5/02 (2006.01) B43K 5/18 (2006.01) B43K 8/03 (2006.01) B43K 8/14 (2006.01)

Patent

CA 2011485

Abstract of the Disclosure A pen containing free liquid ink in which the ink reservoir is vented to atmosphere by use of hydrophobic material whereby the pen is prevented from leaking ink through capillary vents or the like while having the pressure in the reservoir equalized with ambient elf pressure by the hydrophobic venting material.

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