A method of simultaneously encoding successive groups of printed paper sheets or mass distributable material wherein the sheets (20) are provided with unperceptable and virtually invisible common code pattern (30) by laser means (70) which is supplied with a distinct series of coded pulse signals in synchronism with control pulses to produce a different optically-scannable coded hole pattern (30) on each group of printed sheets.
申请公布号
EP0566563(A4)
申请公布日期
1994.01.12
申请号
EP19910901166
申请日期
1990.12.04
申请人
WEBCRAFT TECHNOLOGIES, INC.
发明人
SILVERSCHOTZ, STANFORD, B.;HIPKO, GEORGE, P.;DENNIS, MICHAEL
