发明名称 |
Gas-pressurized writing instrument and writing instrument refill |
摘要 |
A gas-pressurized writing instrument simply constructed so that a compressed gas will not escape to the outside by providing a writing point assembly ( 10 ) at the front end ( 14 a) of a tube member ( 14 ), storing an ink ( 12 ) to be fed to the writing point assembly ( 10 ) in the tube member ( 14 ), encasing at least part of the tube member ( 10 ) by a casing cylinder ( 18 ) formed of a material that presents low gas permeability or gas impermeability so as to form a space ( 16 ) communicating with the rear opening of tube member ( 14 ), sealing a compressed gas inside the space ( 16 ) so that the compressed gas will push the ink out to writing point assembly ( 10 ) to secure the writing performance, and covering the outer periphery of the casing cylinder ( 18 ) with an exterior member having thermal resistance or/and moisture resistance greater than that of the casing cylinder so that the casing cylinder can present low gas permeability or gas impermeability.
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申请公布号 |
US7325992(B2) |
申请公布日期 |
2008.02.05 |
申请号 |
US20040502742 |
申请日期 |
2004.07.28 |
申请人 |
MITSUBISHI PENCIL KABUSHIKI KAISHA |
发明人 |
FURUKAWA KAZUHIKO;FUJISAWA KIYOSHI |
分类号 |
A46B11/02;B43K7/03;B43K7/08 |
主分类号 |
A46B11/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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