发明名称 Method and apparatus for providing a card with penmanship improving indicia
摘要 The present invention contemplates a device and method providing a writing surface such as a face of a greeting card or a sheet of stationary including temporary penmanship improving indicia such as lining or a grid. The invention employs an air-activated, disappearing substance such as ink covered with an overlying ambient environment, sealing barrier sheet preferably removably affixed to the writing surface. To activate the disappearing substance, the user removes the barrier sheet, permitting exposure of the disappearing substance to air, thereby causing a chemical reaction such as oxidation. The user can then utilize the penmanship improving indicia, and his or her writing appears neatly aligned. After a select period of time, e.g., approximately five to ten minutes, the once visible ink disappears, thereby leaving only the user's neatly aligned writing.
申请公布号 US2005181351(A1) 申请公布日期 2005.08.18
申请号 US20040766196 申请日期 2004.01.29
申请人 BALLOUTINE ANTHONY 发明人 BALLOUTINE ANTHONY
分类号 B43L1/00;(IPC1-7):B43L1/00 主分类号 B43L1/00
代理机构 代理人
主权项
地址