Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Wolfgang Witz0
Bernd Bastiansen0
Ralf Polley0
Date of Patent
September 5, 2006
0Patent Application Number
107305120
Date Filed
December 8, 2003
0Patent Primary Examiner
Patent abstract
A free ink marking instrument for dispensing an ink, including a housing, a reservoir for storing ink within the housing, a feed tube to convey ink communicating with the reservoir, a tip disposed within the feed tube for conveying ink to a substrate at a marking end of the tip, a porous buffer disposed within the housing adjacent the feed tube and configured for storing ink during periods of a decreasing pressure differential between the reservoir and the atmosphere, and bubble separation area in the form of either a hole in the feed tube or a hole or passage formed between the feed tube and the tip, is disclosed.
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