Method for compensating shrinkage of plastic webs
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United States of America Patent
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-
Jul 28, 1998
Grant Date -
N/A
app pub date -
Nov 15, 1996
filing date -
Nov 18, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
When producing plastic cards, a plurality of layers is laminated under application of heat and pressure resulting in unpredictable shrinking. In order to compensate shrinking, the laminated web is elongated to adapt to its nominal alignment size. Elongation is produced by material displacement along grid bars separating to-be-fabricated cards later punched off the web leaving a waste grid.
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