Global Patent Index - EP 1838921 A1

EP 1838921 A1 2007-10-03 - DRY CYLINDER

Title (en)

DRY CYLINDER

Title (de)

TROCKENZYLINDER

Title (fr)

CYLINDRE-SECHEUR

Publication

EP 1838921 A1 (DE)

Application

EP 05811125 A

Priority

  • EP 2005056151 W
  • DE 102005000782 A

Abstract (en)

[origin: WO2006072507A1] The invention relates to a dry cylinder (4) which is used to dry a paper, cardboard, tissue of other web of fibrous material (1 ) in a machine for the production and/or for the transformation thereof. Said dry cylinder comprises a support body (8) and an external cover layer (7) which is heated by a hot fluid. The thermal flow passing through the external cover layer (7) is increased such that at least one cavity (12) is provided between the support body (8) and the external cover layer (7) through which the fluid flows, and the external cover layer (7) is predominately so thin that the quotient (A) formed by the thermal conductivity of the material and the thickness(s) of the external cover layer (7) is greater than a threshold value (G) which is 3,2 kW/m2K for steel, 30 kW/m2K for aluminium, 18 kW/m2K for bronze alloys, 3,4 kW/m2K for copper and 6,1 kW/m2K for magnesium.

IPC 8 full level (invention and additional information)

D21F 5/02 (2006.01)

CPC (invention and additional information)

D21F 5/027 (2013.01)

Citation (search report)

See references of WO 2006072507A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

EPO simple patent family

WO 2006072507 A1 20060713; BR PI0518106 A 20081104; CN 101094953 A 20071226; DE 102005000782 A1 20060720; EP 1838921 A1 20071003; JP 2008527289 A 20080724; JP 2011047643 A 20110310; JP 4633801 B2 20110223; RU 2007129851 A 20090220; RU 2372434 C2 20091110; US 2007294914 A1 20071227; US 7802377 B2 20100928

INPADOC legal status


2013-11-13 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20130601

2009-03-04 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20090203

2008-04-09 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) DELETED

2007-10-03 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20070806

2007-10-03 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR