Banzai
Satoru Banzai, Gunma JP
Patent application number | Description | Published |
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20120037035 | PENCIL LEAD AND PRODUCTION PROCESS FOR THE SAME - A pencil lead containing flake graphite which has an ab face having a flatness of at least 2 μm or less and in which an aspect ratio of an a axis or a b axis in the ab face to a c axis is 5 or more is provided with a structure in which nanoparticles having a my value of 0.05 to 2 based on 100 of a volume average diameter (my value) of the graphite and having a sphericity of 0.1 to 20 nm or nanoparticles having a my value of 0.05 to 2 based on 100 of a volume average diameter (my value) of the graphite and having a specific surface area of 200 to 600 m | 02-16-2012 |
Satoru Banzai, Fujioka-Shi JP
Patent application number | Description | Published |
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20140150203 | ERASING MEMBER AND ERASING TOOL USING THE SAME - Provided are an erasing member which is excellent in erasability for handwritings written by means of a pencil, a mechanical pencil and the like and which does not produce eraser dusts, and an erasing tool in which a part to be erased can be visually recognized in erasing. | 06-05-2014 |
Satoru Banzai, Fujioka-Shi, Gunma JP
Patent application number | Description | Published |
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20150298489 | WRITING INSTRUMENT - Provided is a writing instrument suited to ballpoint pens, marking pens and the like in which a flow pressure of an ink applied to a pen tip is controlled to a fixed level to prevent an ink direct flow phenomenon reverse flow phenomenon. The above writing instrument comprises a pen tip disposed at a front part of an ink tank, an ink received in the ink tank, a follower filled at a rear part of the ink, and a capillary porous member provided with a capillary force, which is arranged at a space part between a rear part of the follower and a rear end part of the ink tank in a state in which the follower is filled, wherein the pen tip is sealed when a cap is put on the writing instrument. | 10-22-2015 |