Laser perforation of paper
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United States of America Patent
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Aug 22, 1995
Issued Date -
N/A
app pub date -
Jun 23, 1994
filing date -
Aug 17, 1990
priority date (Note) -
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Abstract
Laser perforation of all types of paper provides paper having sufficient strength characteristics to survive stresses imposed during handling, such as experienced in sheet feed processes. The paper so perforated is readily separable along the perforation line when separation is desired. Carbonless paper products particularly benefit from use of a laser in perforation. The paper, capsule, and capsule fill material are vaporized during the laser process, thus forming clean holes and leaving little residual material on the paper.
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