Westvaco Corporation

Edward P Klein

Thomas M Neider

Alfred H Nissan

David E Knox

Robert C Streisel

Stanley M Nuzum

Improvements in the construction of postformable laminates are disclosed by the provision of a single high basis weight sheet exhibiting improved saturation and resin pick up characteristics and formed predominantly of hardwood pulp which pulp has been mechanically treated to effectively impart kinking and curling to the individual pulp fibers.

Postforming decorative laminates

A method and apparatus is provided for measuring the present and ongoing performance of paper pulp brown stock washers. Black liquor carryover within a washer mat past wash liquor application showers is quantified by determination of and correlation with the mat liquor specific conductivity.

Method of determining black liquor solids concentration remaining in a

The washing efficiency of removal of cooking and bleaching chemicals from cellulose paper pulp on horizontal belt washing filters is improved by disrupting the filter mat adjacent the belt intermediately of soft, displacement wash liquor applications to the filter mat topside. The objective may be achieved by directing a line of low volume, high pressure jets of filtrate or wash liquor against the belt underside. Alternatively, sonicly vibrated foils extended transversely of and adjacent to the belt are effective to disrupt the filler mat pursuant to the invention objective.

Method for washing a paper fiber on a belt washer using a sonic

Apparatus for measuring concentration of dissolved solids in a pulp mat

Belt washing improvements

The washing efficiency for removal of cooking and bleaching chemicals from cellulose paper pulp on rotary vacuum filters is improved by disrupting the filter mat with a low volume, directly impinged flow of wash liquor applied intermediately of soft, displacement wash liquor applications. No additional wash liquor is allocated for respective wash stages but the mat distrubing flow volume is deducted from the predetermined requirement with the remainder divided in substantially equal proportions applied before and after the mat disturbing application.

Apparatus for washing paper pulp

A method of improving the washing efficiency for removal of cooking and bleaching chemicals from cellulose paper pulp on rotary vacuum filters by disrupting the filter mat with a low volume, directly impinged flow of wash liquor applied intermediately of soft, displacement wash liquor applications. No additional wash liquor is allocated for respective wash stages but the mat disturbing flow volume is deducted from the predetermined requirement with the remainder divided in substantially equal proportions applied before and after the mat disturbing application.

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Covington, VA, United States of America

Edward P Klein