Global Patent Index - EP 2385172 A1

EP 2385172 A1 20111109 - Method for converting a multi-roll calendar

Title (en)

Method for converting a multi-roll calendar

Title (de)

Umbauverfahren eines Mehrwalzenkalanders

Title (fr)

Procédé de démontage d'une calandre à plusieurs rouleaux

Publication

EP 2385172 A1 20111109 (DE)

Application

EP 11175279 A 20100916

Priority

  • EP 10177009 A 20100916
  • DE 102009046918 A 20091120

Abstract (en)

The multiroll calendar comprises a roll stack, in which two consecutive rolls form a roller nip for calendaring wood free coated paper on a brightness according to Gardner of greater than 75% or natural gravure papers on a pps-10 S-roughness under 1.15 mu m or film-coated light-weight coated papers on a brightness according to Gardner over 55%, where the roll stack is structured in a following row sequence such as a hard controlled deflection top roller (2), an elastic center roller with a thin metallic surface layer, a heatable hard middle roller, and two elastic middle rollers. The multiroll calendar comprises a roll stack, in which two consecutive rolls form a roller nip for calendaring wood free coated paper on a brightness according to Gardner of greater than 75% or natural gravure papers on a pps-10 S-roughness under 1.15 mu m or film-coated light-weight coated papers on a brightness according to Gardner over 55%, where the roll stack is structured in a following row sequence such as a hard controlled deflection top roller (2), an elastic center roller with a thin metallic surface layer, a heatable hard middle roller, two elastic middle rollers with a thin metallic surface layer, a heatable hard middle roller, an elastic middle roller with a thin metallic surface layer and a hard controlled deflection bottom roller. The elastic roller with a metal surface layer in the calendaring operation has a surface temperature of 90-130? oC. A line load of 300 N/mm acts in the roller nip in order to receive a nip length in web direction of 10 mm. A pressure element (14) is provided, in which the paper web (11) is designed before or after the roller nip over a contact angle of 5[deg] on the surface of a smooth, hard and heated roller. An independent claim is included for a method for converting multi-roll calendars.

Abstract (de)

Die Erfindung betrifft ein Verfahren zum Umbau eines Mehrwalzenkalanders mit einem Walzenstapel. Um die hochwertigen Papiere mit weniger Walzen satinieren zu können als üblich, versieht man die Ober- und Unterwalze (2, 9) mit einem Mantel mit einem elastischen Belag, wenn sie eine harte Oberfläche aufweisen, bzw. versieht die Ober- und Unterwalze (2, 9) mit einem Mantel mit harter, glatter Oberfläche, wenn sie einen elastischen Belag aufweisen, weiterhin versieht man wenigstens eine Walze mit elastischem Belag (3, 5, 6, 8) mit einer metallischen Spritzschicht und weiterhin entfernt man die zweite Walze und vorletzte Walze aus dem Walzenstapel.

IPC 8 full level

D21G 1/00 (2006.01); D21G 1/02 (2006.01)

CPC (source: EP)

D21G 1/00 (2013.01); D21G 1/0233 (2013.01); D21G 1/0253 (2013.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

Designated extension state (EPC)

BA ME RS

DOCDB simple family (publication)

EP 2325387 A2 20110525; EP 2325387 A3 20110601; EP 2325387 B1 20120905; CN 102071589 A 20110525; DE 102009046918 A1 20110526; EP 2385172 A1 20111109; EP 2385172 B1 20120905

DOCDB simple family (application)

EP 10177009 A 20100916; CN 201010558162 A 20101119; DE 102009046918 A 20091120; EP 11175279 A 20100916