Rotary cutting dies with vacuum assist to cut and clear waste
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United States of America Patent
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-
Jul 15, 1986
Grant Date -
N/A
app pub date -
Jul 16, 1984
filing date -
Jul 16, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A die-cutting roll is constructed to cut holes in traveling web materials, and for clearing and discharging the fragments, in a highly effective manner. A multiplicity of air vent ports communicate with the channel through which the scrap moves to an internal axial passage of the roll, and supplement the effect of vacuum applied to one end thereof. Desirably, a disuniting effect is produced upon compacted formations strands of the removed material, by creating turbulence within the passage and/or by mechanical impact thereupon.
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