Marked multi-ply paper sheets and method and equipment for their manufacture
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United States of America Patent
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Aug 22, 1995
Grant Date -
N/A
app pub date -
Oct 20, 1993
filing date -
Feb 20, 1991
priority date (Note) -
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Abstract
A paper sheet having several distinct layers comprised of at least two plies of paper glued together in discrete areas and characterized by having patterns which correspond to areas of reduced thickness on both outer surfaces of the plies of paper.
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