| 发明名称 | Writing instrument | ||
| 摘要 | 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. | ||
| 申请公布号 | US9636940(B2) | 申请公布日期 | 2017.05.02 |
| 申请号 | US201314647925 | 申请日期 | 2013.12.03 |
| 申请人 | MITSUBISHI PENCIL COMPANY, LIMITED | 发明人 | Kamitani Toshimi;Banzai Satoru;Namiki Yoshiharu;Setagawa Yosuke;Kino Hitoshi;Nakajima Tooru;Suzuki Takanori |
| 分类号 | B43K7/08;B43K23/12;B43K7/02;B43K8/03;B43K8/02;B43K8/06;B43K7/01;B43K8/04;B43K5/18;B43K7/03;B43K7/10;B43K8/14 | 主分类号 | B43K7/08 |
| 代理机构 | Buchanan, Ingersoll & Rooney PC | 代理人 | Buchanan, Ingersoll & Rooney PC |
| 主权项 | 1. A writing instrument comprising 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 by impregnating the porous member with a liquid, 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 a capillary force provided at a pen tip side is larger than a total of an own weight of the ink and the capillary force at a rear part of the writing instrument, and the pen tip is sealed when a cap is put on the writing instrument. | ||
| 地址 | Tokyo JP | ||