Security of game cards such as instant lottery tickets can be improved by locating a confusion pattern below a primer layer on the game cards substrate and by locating another confusion pattern on a release coat above the game card play indica. Game card security can be further enhanced by using confusion pattern ink that bleeds through the game card in response to the application of various solvents.
申请公布号
US5667250(A)
申请公布日期
1997.09.16
申请号
US19940289708
申请日期
1994.08.12
申请人
BEHM, WILLIAM F.;TEVIS, MARK C.;WALTON, BRADLEY W.;LITMAN, STANLEY
发明人
BEHM, WILLIAM F.;TEVIS, MARK C.;WALTON, BRADLEY W.;LITMAN, STANLEY