Method of obtaining bend lines on packaging material
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United States of America Patent
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May 4, 1993
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N/A
app pub date -
Sep 11, 1991
filing date -
Oct 5, 1990
priority date (Note) -
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Abstract
Bend lines on packaging material are obtained by creasing, which results in crease lines which are raised on one side of the material. According to the invention the raised parts of the crease lines are removed by mechanical processing, such as by milling, considerably increasing the crease lines' weakening effect on the packaging material and facilitating subsequent bending of the material.
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