Global Patent Index - EP 2784212 A1

EP 2784212 A1 20141001 - Paper or board making machine and method for manufacturing high filler content paper or board

Title (en)

Paper or board making machine and method for manufacturing high filler content paper or board

Title (de)

Papier- oder Kartonherstellungsmaschine und Verfahren zum Herstellen von Papier oder Karton mit hohem Füllstoffgehalt

Title (fr)

Machine de fabrication de papier ou de carton et procédé de fabrication de papier ou carton à forte teneur en charge

Publication

EP 2784212 A1 20141001 (EN)

Application

EP 13161553 A 20130328

Priority

EP 13161553 A 20130328

Abstract (en)

The invention pertains to a paper or board making machine for manufacturing high filler content paper or board and to a corresponding method. The paper or board making machine comprises a forming section (101) in which at least one wire (105) arranged in a wire loop is provided for forming a web (W) from a fiber suspension, a closed draw press section (102) in which at least two press nips (N, N) being formed between two rolls (118, 119) each are provided for dewatering the web (W) transferred from the forming section (101), and a drying section (103) in which at least one drying cylinder (132) is provided for drying the web (W) transferred from the closed draw press section (102). The forming section (101) comprises a headbox (99) being capable of supplying liquids onto the wire (105, 109) in a layered manner and comprising a turbulence generator and a nozzle chamber having two converging walls (21, 22) forming a nozzle outlet (24). The turbulence generator has at least three diffusers (1, 3, 5, 7, 9) creating turbulence in liquids supplied into each respective diffuser (1, 3, 5, 7, 9) via feeding means (25, 27, 29) for feeding pulp suspension and/or water as the liquids. Each of the diffusers (1, 3, 5, 7, 9) has an outlet into the nozzle chamber. A central diffuser (1) of the at least three diffusers (1, 3, 5, 7, 9) has two blades (11, 13) arranged at its outlet and extending into the nozzle chamber in a converging manner. The blades (11, 13) separate a liquid flowing through the central diffuser (1) from liquids flowing through adjacent diffusers (3, 5, 7, 9). In the transporting direction of the web an impingement drying means (123, 124) is arranged before the at least one drying cylinder (132) in the drying section (103).

IPC 8 full level

D21F 1/02 (2006.01); D21F 3/04 (2006.01); D21F 5/18 (2006.01); D21F 9/02 (2006.01); D21F 11/04 (2006.01)

CPC (source: EP)

D21F 1/026 (2013.01); D21F 1/028 (2013.01); D21F 3/045 (2013.01); D21F 5/18 (2013.01); D21F 9/02 (2013.01); D21F 11/04 (2013.01)

Citation (applicant)

WO 2008034947 A1 20080327 - METSO PAPER INC [FI], et al

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 RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2784212 A1 20141001; CN 104074091 A 20141001

DOCDB simple family (application)

EP 13161553 A 20130328; CN 201410095851 A 20140314