Process for softening webs
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 24, 1990
Issued Date -
N/A
app pub date -
Sep 8, 1989
filing date -
Dec 3, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A microcreping process is improved by using a razor sharp retarder blade positioned such that its razor edge is overlapped by either the primary blade or a back-up blade, whichever extends the furthest downstream. Preferably, pressure is applied to the primary blade through one or more back-up blades arranged in a stepwise configuration.
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Cited Art Landscape
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