发明名称 LASER IMAGE ENGRAVING IN SCRATCH-OFF COATING APPLICATIONS
摘要 <p>A method and system for creating game cards incorporates a removable scratch-off coating to hide printed symbols. The card is constructed so that the scratch-off coating is selectively retained by the card, in the form of symbols, when the scratch-off coating is removed. The selective retention of scratch-off coating material to the card is accomplished by incorporating into the card, between the substrate and the scratch-off coating, a clear release coat laser-engraved to form symbols. A laser creates the desired symbols in the release coat. The laser may be manually controlled or computer-controlled using software and drivers for the laser assembly. When the scratch-off coating material is applied to the card during construction, it adheres directly to the substrate in the form of symbols. When a player rubs the scratch-off coating material, it releases from the release coat and remains adhered to the substrate to create the symbols.</p>
申请公布号 WO2000009344(A1) 申请公布日期 2000.02.24
申请号 US1999017373 申请日期 1999.07.30
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