Writing instrument
    1.
    发明申请
    Writing instrument 失效
    书写工具

    公开(公告)号:US20010016142A1

    公开(公告)日:2001-08-23

    申请号:US09771053

    申请日:2001-01-26

    发明人: Takao Koyama

    IPC分类号: B43K005/02

    摘要: Provided is a free ink type writing instrument having an ink tank part for storing an ink, in which an amount of the ink can visually be observed. The free ink type writing instrument is characterized by that the whole or a part of an internal surface part in contact with the ink in the ink tank part has a smaller critical surface tension than a surface tension of the ink, and a contact angle between the ink and the whole or a part of the internal surface part in contact with the ink in the ink tank part is 30null or more at a temperature of 25null C.

    摘要翻译: 提供一种具有用于存储墨水的墨水罐部分的自由墨水型书写工具,其中可以在视觉上观察墨水的量。 自由墨型书写工具的特征在于,与墨盒部分中的墨接触的内表面部分的全部或一部分具有比墨水的表面张力小的临界表面张力, 在25℃的温度下,墨水部分中与油墨部分中的油墨接触的整个或部分内表面部分为30°以上。