Global Patent Index - EP 1068389 A1

EP 1068389 A1 2001-01-17 - METHOD AND APPARATUS FOR DEINKING PAPER

Title (en)

METHOD AND APPARATUS FOR DEINKING PAPER

Title (de)

VERFAHREN UND VORRICHTUNG ZUM DEINKEN VON PAPIER

Title (fr)

PROCEDE ET DISPOSITIF DE DESENCRAGE DU PAPIER

Publication

EP 1068389 A1 (EN)

Application

EP 99912774 A

Priority

  • US 9906181 W
  • US 4433498 A

Abstract (en)

[origin: WO9947743A1] Deinking a sheet of paper by removing toner thereon including wetting the sheet of paper with a non-toxic, water soluble deinking solution which comprises water, for wetting the sheet of paper to swell the fibers of the sheet, a water soluble surfactant for lowering the surface tension of the water to enhance wetting of the sheet with the water, and no more than two water soluble solvents for softening the toner, without dissolving the toner, and for breaking the bond between the toner and the sheet; removing the softened toner from the sheet, creating toner particles; heating the sheet to vaporize the deinking solution, removing the solution from the sheet; and calendering the sheet of paper to return the sheet to the predetermined dimensions for immediate reuse.

IPC 1-7 (main, further and additional classification)

D21C 5/02; B08B 3/08

IPC 8 full level (invention and additional information)

B08B 3/08 (2006.01); D21C 5/02 (2006.01); D21H 11/14 (2006.01); G03G 21/00 (2006.01)

CPC (invention and additional information)

D21C 5/025 (2013.01); D21H 11/14 (2013.01); G03G 21/00 (2013.01); Y02W 30/648 (2015.05)

Citation (search report)

See references of WO 9947743A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9947743 A1 19990923; WO 9947743 A9 19991223; CA 2324280 A1 19990923; EP 1068389 A1 20010117; IL 138519 D0 20011031; JP 2002506934 A 20020305; TW 396062 B 20000701

INPADOC legal status


2004-03-17 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030909

2001-11-07 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010921

2001-01-17 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001019

2001-01-17 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE