发明授权
US06953345B1 Water-metachromatic cloth sheet, toy set using the same, and writing instrument for water-metachromatic members
有权
水异色布片，使用其的玩具组，以及用于水异色构件的书写工具
- 专利标题： Water-metachromatic cloth sheet, toy set using the same, and writing instrument for water-metachromatic members
- 专利标题（中）： 水异色布片，使用其的玩具组，以及用于水异色构件的书写工具
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申请号： US09679341申请日： 2000-10-04
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公开(公告)号： US06953345B1公开(公告)日： 2005-10-11
- 发明人: Akio Nakashima , Takao Kani
- 申请人： Akio Nakashima , Takao Kani
- 申请人地址： JP Aichi-ken
- 专利权人： The Pilot Ink Co., Ltd.
- 当前专利权人： The Pilot Ink Co., Ltd.
- 当前专利权人地址： JP Aichi-ken
- 代理机构： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP11-284005 19991005
- 主分类号： A63H33/22
- IPC分类号： A63H33/22 ; A63H33/00 ; B41M3/00 ; B43K11/00 ; B43K27/08 ; B44D2/00 ; B44F1/10 ; D06M11/79 ; D06P1/00 ; D06Q1/10 ; G09B11/00 ; B43L1/00 ; G09B11/10
摘要：
A water-metachromatic sheet has a support with a porous layer containing a binder resin with dispersed fine-particle silicic acid. The sheet is capable of rendering different transparency between water absorbed and unabsorbed states. The support is a cloth having a weight per unit area of 30 gm2 to 1,000 gm2, the fine-particle silicic acid is contained in an amount of from 1 gm2 to 30 gm2, and the fine-particle silicic acid is incorporated in an amount from 0.5 to 2 parts by weight based on 1 part by weight of the binder resin.