Apparatus for forming a cellulosic fibrous structures having at least three regions distinguished by intensive properties
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United States of America Patent
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Mar 25, 1997
Issued Date -
N/A
app pub date -
Mar 1, 1996
filing date -
Jul 10, 1987
priority date (Note) -
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Abstract
An apparatus and process for making the fibrous structure, having three four, and more regions. The process is similar to known papermaking techniques, but comprises the additional steps of applying a differential pressure to selected regions of the fibrous structure which are not coincident with the regions of the fibrous structure defined by the apparatus in prior steps of the papermaking process. The selective application of noncoincident differential pressure to selected regions of the fibrous structure may result in densification or dedensification of such regions.
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