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US 2001/0012468 A1Published application
Double ended direct-feed type writing implement
AssigneeMitsubishi Pencil Company, Limited
InventorsKazuhiko Furukawa, Hiroaki Koyama, Takeshi Kobayashi, Yojiro Sano, Yosuke Mito
Life of this patent
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Abstract
A double ended direct-feed type writing implement includes: an ink tank; a pair of writing points (point assemblies) arranged both ends of the ink tank; ink collectors; an ink feeder means including a center core; arrangement for inhibiting air from flowing into the ink tank through the ink collector air/liquid exchanger located at the top while the pen is unused for writing.
Claims9
A double ended direct-feed type writing implement comprising:
- an ink tank;
- a pair of writing points (point assemblies) as writing elements, arranged both ends of the ink tank;
- an ink collector, provided for each writing point, and having an air/liquid exchanger for adjusting the internal pressure inside the ink tank by making use of capillarity;
- an ink feeder means, provided for each writing point, and including a center core for feeding ink to the writing point (point assembly);
- and
- means for inhibiting air from flowing into the ink tank through the ink collector air/liquid exchanger located at the top while the pen is unused for writing.
3 more elements
Dependencies are inferred from the claim text.