Photographic developing apparatus

Details Photographic developing apparatus Photographic developing apparatus

1989-08-18

1991-05-28

Mathews, A. A.

354324, G03D 306, G03D 308

Patent

active

050198505

ABSTRACT:
A photographic developing apparatus of the type in which development is effected by passing exposed sensitive material (principally one for printing such as photographic paper) successively through a developing vessel, a bleaching/fixing vessel, and a rinsing vessel. The bleaching/fixing vessel is replenished with a mixture of concentrated processing liquid and liquid extracted from the rinsing vessel, so that the amount of processing liquid discharged from the rinsing vessel as overflow is reduced, thereby alleviating the burden of waste liquid disposal.
When the exposed sensitive material to be processed is principally one for photographing such as negative film or reversal film, the material is successively passed through a developing vessel, a bleaching vessel, a fixing vessel, and a rinsing vessel, or through a developing vessel, a bleaching vessel, a bleaching/fixing vessel, and a rinsing vessel, so that concentrated processing liquid and liquid extracted from the rinsing vessel are supplied to the fixing vessel or the bleaching/fixing vessel which is immediately before the rinsing vessel.

REFERENCES:
patent: 4081816 (1978-03-01), Geyken et al.
patent: 4329042 (1982-05-01), Libicky et al.
patent: 4451132 (1984-05-01), Kishimoto

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