Apparatus for cutting sheet material
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United States of America Patent
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-
Nov 17, 1998
Grant Date -
N/A
app pub date -
Nov 14, 1996
filing date -
Mar 31, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Apparatus for slitting or cutting material comprises a driving roller 10 and a driven roller 12. Each roller 10 or 12 has on its periphery a plurality of ribs at a predetermined pitch and helix angle. The pitch of the ribs 18 on the driving roller 10 is smaller than the pitch of the ribs 30 on the driven roller 12, and the helix angle of the ribs 18 on the driving roller 10 is of opposite direction to, and of smaller magnitude than, the helix angle of the ribs 30 on the driven roller 12. The ribs 18, 30 cooperate to cut with a shearing action a web 16 of sheet material fed into the nip between the rollers 10, 12.
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