Rotary perforator, method for perforating a web, and web perforated by the rotary perforator
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United States of America Patent
Stats
-
Jun 7, 1994
Grant Date -
N/A
app pub date -
Aug 12, 1992
filing date -
Aug 15, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A perforator for perforating a web. The perforator has a rotatable drum for supporting the web; an arm having a punch, which rotates integrally with the drum; a driver for swinging the arm, which rotates integrally with the drum; and a taper rib which does not rotate with the drum, in which the taper rib is provided with a roller gear cam for engaging with the taper rib which is provided on a circumference concentric with the drum in a cross section perpendicular to an axis of the drum, so that the taper rib causes the driver to swing and the punch perforates the web with rotation of the drum.
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