Method of preparing paper for filter bags, apparatus for implementing the method, and product obtained thereby
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United States of America Patent
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Jun 18, 1996
Issued Date -
N/A
app pub date -
May 12, 1993
filing date -
Mar 8, 1990
priority date (Note) -
Expired
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Abstract
A method of preparing paper for filter bags, the method of the type comprising a step during which a non-woven paper is prepared comprising two superposed layers, namely a layer based on synthetic fibers and a layer of cellulose fibers, by a technique which is known per se, wherein the method includes a subsequent step of subjecting the non-woven paper to a calendering operation between a support structure and a heated cylinder having projections. The present invention also provides apparatus for implementing the method and products obtained in this manner.
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