Method of subdividing webs
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United States of America Patent
Stats
-
Jun 6, 1995
Grant Date -
N/A
app pub date -
Apr 16, 1993
filing date -
Apr 18, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A web of coherent labels or coherent blanks of wrapping material is advanced along an elongated path toward a severing station where the web is cut at selected intervals by an orbiting knife in cooperation with a stationary or moving knife to yield a succession of sections of desired length. If the web is to be arrested for a shorter or longer period, it is first accelerated above its standard speed and is thereupon decelerated to zero speed during the last interval of advancement so that the length of the leader of the web extending beyond the severing station matches the desired length. Analogously, when the web is restarted, it is accelerated above the standard speed and is thereupon decelerated to such standard speed during the first interval of advancement so that the knives sever a section whose length again matches the desired length. If a first web is to be followed by a second web, the leader of the second web is maintained at a standstill at the severing-station, and the second web is accelerated first above the standard speed and is thereupon decelerated to standard speed during an interval following stoppage or expiration of the first web so that the length of the first separated section of the second web again matches the desired length.
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