METHOD AND APPARATUS FOR PUNCHING OR PERFORATING MOVING MATERIAL WEBS
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United States of America Patent
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Issued Date -
Feb 14, 2013
app pub date -
Feb 9, 2012
filing date -
Feb 10, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In order to make holes with different spacings between them, a punching tool is provided with punching dies on its circumference and interacts with an impression cylinder. Between two punching operations, either of the punching dies and the impression cylinder is driven, at times, at a circumferential speed that is greater or smaller than the movement speed of the material web that is to be punched or is stopped briefly and, until the next punching operation, brought once again to a circumferential speed that corresponds to the movement speed of the material web that is to be punched.
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