- 专利标题: BALLPOINT PEN TIP, BALLPOINT PEN REFILL, AND BALLPOINT PEN
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申请号: EP21892021.3申请日: 2021-11-15
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公开(公告)号: EP4245560A1公开(公告)日: 2023-09-20
- 发明人: KAJIWARA Takumi , MASUSHIGE Naoto
- 申请人: Kabushiki Kaisha Pilot Corporation (also trading as Pilot Corporation)
- 申请人地址: JP Tokyo 104-8304 6-21, Kyobashi 2-chome Chuo-ku
- 代理机构: Hoffmann Eitle
- 优先权: JP2021184782 20211112
- 国际公布: WO2022102776 20220519
- 主分类号: B43K1/08
- IPC分类号: B43K1/08
摘要:
The ballpoint pen tip (40) comprises: a ball (42) having a diameter of 0.5 mm or less; and a tip body (50) that holds the ball, wherein the tip body has a ball holding chamber (52) that holds the ball, a rear hole (57) located rearward of the ball holding chamber, an ink flow hole (62) that allows the ball holding chamber and the rear hole to communicate with each other, and an ink flow groove (64) extending in a radial direction (dr) from the ink flow hole, opening to the ball holding chamber, and not reaching the rear hole, a ratio (A/B) of an ink consumption A per 100 m of handwriting to a diameter B of the ball is 200 mg/mm or more and 800 mg/mm or less, and when a front end (64a) of the ink flow groove is set as a start point S1 and a position of 0.3 mm rearward from the front end (62a) of the ink flow hole is set as an end point S2, a volume of a first space (SA) in the ink flow hole and the ink flow groove from the start point to the end point is 0.02 mm 3 or more.
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