Process and apparatus for deacidifying books

Process and apparatus for deacidifying books

To neutralize the acid in books, a processing chamber (1) takes the books half-opened on their spines to give free-projecting pages (6) in a fan. The pages are initially flushed with a water droplets/air mixture (11) in an underpressure, and then blown with a mixture (12) of air and an active substa...

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Hauptverfasser: LEISCH, NORBERT, KRATZERT, ARMIN, ZITZMANN, PETER
Format: Patent
Sprache:eng ; fre ; ger
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IMPREGNATING OR COATING OF PAPER
PAPER NOT OTHERWISE PROVIDED FOR
PAPER-MAKING
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
PRODUCTION OF CELLULOSE
PULP COMPOSITIONS
TEXTILES
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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creator LEISCH, NORBERT
KRATZERT, ARMIN
ZITZMANN, PETER
description To neutralize the acid in books, a processing chamber (1) takes the books half-opened on their spines to give free-projecting pages (6) in a fan. The pages are initially flushed with a water droplets/air mixture (11) in an underpressure, and then blown with a mixture (12) of air and an active substance in an overpressure. The water droplet/air mixture is heated to a maximum of 50 degrees C and preferably a maximum of 40 degrees C. The overpressure in the chamber, during blowing, is at least 1500 mbar and preferably at least 2000 mbar. The books are passed to a chamber (14) to dwell in a controlled atmosphere to cure the active substances. On removal, the pages have a pH value of ≤ 7.5. The active substance is preferably MgO powder.
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subjects IMPREGNATING OR COATING OF PAPER
PAPER NOT OTHERWISE PROVIDED FOR
PAPER-MAKING
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
PRODUCTION OF CELLULOSE
PULP COMPOSITIONS
TEXTILES
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
title Process and apparatus for deacidifying books
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