Method of fluting a corrugating medium
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United States of America Patent
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May 30, 1995
Issued Date -
N/A
app pub date -
Mar 3, 1994
filing date -
Apr 25, 1991
priority date (Note) -
Expired
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Abstract
The invention is a method of fluting corrugating medium which can be formed in conventional or unconventional flute configurations. The method employs at least one additional corrugating roll in addition to the usual two. The first pair of rolls create initial flutes in the medium. Initially fluted medium is then transferred to a third roll of lesser flute pitch than the first rolls. In this manner the initially created flutes can be reformed into configurations not possible using conventional systems. A fourth roll can be used to achieve additional flute pitch reduction. Using this method flutes with very sharply angled tips can be formed. Other embodiments enable formation of less conventional cross sectional configurations such as flutes with asymmetric patterns.
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