Method of producing visible, continuous streaks and/or delimited fields in paper
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United States of America Patent
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Nov 23, 1999
Grant Date -
N/A
app pub date -
Jun 9, 1995
filing date -
Nov 11, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a method of producing visible, preferably transparent or translucent, continuous streaks and/or delimited fields in paper in conjunction with forming a paper web in a paper machine. The method is characterized by essentially preventing dewatering of paper stock/paper fibres on one or more surfaces of a wire in the forming unit of a paper machine in conjunction with forming a paper web in the machine, and by applying a special stock that contains fibres which differ from the other fibre material deposited on the wire, optionally together with an arbitrary filler and/or binder. The invention also relates to a valuable document, such as a banknote, produced from the aforedescribed paper.
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Cited Art Landscape
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