A printed and encoded mass distributable response piece and...

Details A printed and encoded mass distributable response piece and... A printed and encoded mass distributable response piece and...

B - Operations, Transporting

42

D

B42D 15/00 (2006.01) B44F 1/00 (2006.01) G01N 22/00 (2006.01) G01N 33/28 (2006.01) G06K 1/12 (2006.01)

Patent

CA 2097819

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 suppli- ed 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.

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