Uniformly debossing and aperturing a moving plastic web using stationary support member in forming area
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United States of America Patent
Stats
-
May 3, 1988
Issued Date -
N/A
app pub date -
Jan 23, 1986
filing date -
Oct 17, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method and apparatus for uniformly macroscopically expanding and, if desired, aperturing a plastic web. This is preferably accomplished by supporting the plastic web on a moving three-dimensional forming structure which is supported in a fluid pressure differential zone by a stationary support member. By providing a relationship between the size and pattern of the apertures in the stationary support member and the size and pattern of the apertures in the three-dimensional forming structure, substantially all of the apertures present in the forming structure are unobstructed by the stationary support member at some point during the forming structure's traverse of the fluid pressure differential zone. Thus the resultant plastic web is uniformly debossed and, if desired, apertured in the pattern of the three-dimensional forming structure.
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Cited Art Landscape
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