Global Patent Index - EP 0497199 A1

EP 0497199 A1 19920805 - Method and relative apparatus for the re-use of wash water in the photographic field.

Title (en)

Method and relative apparatus for the re-use of wash water in the photographic field.

Title (de)

Verfahren und entsprechende Vorrichtung zur Wiederverwendung photographischen Waschwassers.

Title (fr)

Procédé et appareil pour la récyclage d'eau de lavage, photographique.

Publication

EP 0497199 A1 19920805 (EN)

Application

EP 92100984 A 19920122

Priority

IT UD910017 A 19910201

Abstract (en)

Method for the re-use of wash water in the photographic field, whereby the wash water coming directly from developing machines undergoes a filtration process and at least one step to render safe for photographic purposes the salts contained in the wash water, the above steps to filter and render safe entailing the recirculation of at least a percentage fraction of the wash water and the conversion both of the substances contained in the wash water such as carbonates, calcium, magnesium, iron, etc. and of the salts such as sulphites and thiosulphates resulting from the previous development and fixing step into compounds compatible with the photosensitive material. Apparatus (10) suitable to carry out the above method, which comprises a recirculation circuit (23-28-25) and dosage means (30) governed by a means (32) that measures the surface of sensitive material, the dosage means (30) being associated with respective tanks (26-27) to hold first and second regenerating solutions (A and B). <IMAGE>

IPC 1-7

G03C 5/395; G03D 3/06

IPC 8 full level

B21C 47/00 (2006.01); B21D 3/02 (2006.01); C02F 1/72 (2006.01); G03C 5/395 (2006.01); G03D 3/00 (2006.01); G03D 3/06 (2006.01)

CPC (source: EP)

G03C 5/3952 (2013.01); G03D 3/065 (2013.01)

Citation (search report)

  • [YD] US 3997347 A 19761214 - PARSONAGE HARRY N
  • [A] US 3594157 A 19710720 - HENDRICKSON THOMAS N, et al
  • [X] DE 2850173 A1 19800612 - EUROGRAPH GMBH
  • [Y] FR 2248538 A1 19750516 - CIAIS ANGELE [FR]
  • [A] US 4480901 A 19841106 - OSEGOWITSCH VIKTOR [DE], et al
  • [A] WO 8604522 A1 19860814 - KODAK LTD [GB], et al
  • [Y] PATENT ABSTRACTS OF JAPAN vol. 14, no. 574 (P-1145)20 December 1990 & JP-A-2 247 642 ( FUJI PHOTO FILM CO. LTD. ) 3 October 1990
  • [A] WORLD PATENTS INDEX LATEST Section PQ, Week 9016, Derwent Publications Ltd., London, GB; Class P83, AN 90-118793 & JP-A-2 067 547 (FUJI PHOTO FILM CO. LTD.) 7 March 1990
  • [A] SMPTE JOURNAL vol. 85, no. 3, March 1976, US pages 154 - 159; M.W.BEACH: 'MICROBIAL GROWTHS IN MOTION-PICTURE PROCESSING'

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB GR IT LI LU NL SE

DOCDB simple family (publication)

EP 0497199 A1 19920805; IT 1247448 B 19941217; IT UD910017 A0 19910201; IT UD910017 A1 19920801; JP H05200433 A 19930810; JP H0572698 A 19930326

DOCDB simple family (application)

EP 92100984 A 19920122; IT UD910017 A 19910201; JP 25924992 A 19920929; JP 4620992 A 19920131