EP 0937168 B1 20010620 - PRESS LIQUOR RETURN SYSTEM
Title (en)
PRESS LIQUOR RETURN SYSTEM
Title (de)
PRESSENWASSERRÜCKFÜHRUNG
Title (fr)
SYSTEME DE RETOUR POUR EAU D'ESSORAGE
Publication
Application
Priority
- DE 19645664 A 19961106
- EP 9705944 W 19971028
Abstract (en)
[origin: WO9820194A1] The invention concerns a method of operating washing stages working in counterflow with a plurality of chambers disposed one behind the other, articles to be washed being treated successively in a pre-wash stage (VW), a washing stage (KW), a rinsing stage (SP), an after-treatment stage (NW) and a dewatering stage (EW). The method and a counter-flow washing arrangement for carrying out said method are designed such that the requirements of the laundry as concerns hygiene and appearance are permanently and reliably observed. To that end, a bactericidal and fungistatic detergent aid which is free from active oxygen is added in sufficient metered amounts, and the metered amount of detergent aid added and optionally the salt concentration in the process water are determined and continuously maintained by the appropriate addition of metered amounts of detergent aid and optionally fresh water. The metered amount of detergent aid added and the metered amount of fresh water added are proportioned relative to the amounts of after-treatment liquor (NW) and press liquor (PW) returned from the after-treatment stage (NB) and the dewatering stage (EW) into the rinsing stage (SP) such that the desired concentration values in the process water are set and permanently maintained in this region, taking account of the process water contents conveyed into the after-treatment stage (NB) with the articles to be washed.
IPC 1-7
IPC 8 full level
D06F 31/00 (2006.01); D06F 39/00 (2006.01)
CPC (source: EP US)
D06F 31/005 (2013.01 - EP US); D06F 34/22 (2020.02 - EP US); D06F 2103/22 (2020.02 - EP US); D06F 2105/02 (2020.02 - EP US); D06F 2105/42 (2020.02 - EP US); D06F 2105/58 (2020.02 - EP US); D06F 2105/60 (2020.02 - EP US); D06F 2105/62 (2020.02 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI NL SE
DOCDB simple family (publication)
WO 9820194 A1 19980514; AT E202390 T1 20010715; DE 19645664 A1 19980507; DE 19645664 C2 19980903; DE 59703871 D1 20010726; DK 0937168 T3 20010903; EP 0937168 A1 19990825; EP 0937168 B1 20010620; ES 2160370 T3 20011101; GR 3036480 T3 20011130; NO 992191 D0 19990505; NO 992191 L 19990505
DOCDB simple family (application)
EP 9705944 W 19971028; AT 97945875 T 19971028; DE 19645664 A 19961106; DE 59703871 T 19971028; DK 97945875 T 19971028; EP 97945875 A 19971028; ES 97945875 T 19971028; GR 20010401339 T 20010830; NO 992191 A 19990505