Fluid handling – Systems – Closed circulating system
Reexamination Certificate
2000-08-14
2001-08-21
Rivell, John (Department: 3753)
Fluid handling
Systems
Closed circulating system
C137S565330, C137S565350, C137S571000, C396S626000
Reexamination Certificate
active
06276395
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the environment and more particularly to the treatment of liquids in processing machines.
It is known to reduce spent liquids by making it circulate continuously in recycling devices to enable its reuse.
BACKGROUND OF THE INVENTION
In photography the regulations relating to the disposal of spent water have become more restrictive. It has been suggested to treat the rinsing water so as to be able to recycle it inside the machine in order to reduce the water flows and trap the silver freed during processing. To adapt the operation of machines manufactured prior to the introduction of the new rules and to make them compatible with these new regulations, an independent filtering device has been suggested that connects to the processing installation. In particular this device comprises a treatment tank equipped with a pump enabling spent water to be taken from the rinsing tank and then after treatment to be sent back to the rinsing tank. This device is arranged outside the processing machine.
In the embodiment of the invention that is intended to be utilized on machines for developing X-ray plates the rinsing water contains silver ions and gelatin particles. The recycling device that is used comprises a first type of filter to trap the silver ions in order to limit the concentration to a value less than the regulatory threshold and a second type of filter enabling the gradual release of a biocide so as to inhibit the growth and/or proliferation of microorganisms. To efficiently treat the rinsing waters, the flow rate of the pump is adapted to the volume of the rinsing tank to make the whole volume contained in the tank circulate every few minutes.
For various reasons, especially the processing machine maintenance, the design of certain machines currently on the market or the arrangement of the filtering device in relation to the machine, unpriming of the pump may occur. This phenomenon causes the normal operation of the filtering device to stop, which in turn causes poor functioning of the processing machine.
The invention aims to avoid this disadvantage.
SUMMARY OF THE INVENTION
The processing installation, in accordance with the invention is equipped with a tank containing a processing liquid as well as a recycling device for this liquid; this recycling device is linked to the tank by a feeding pipe enabling a first pump firmly attached to the recycling device to take the liquid from the tank at a set flow rate, to treat the liquid taken and to send the treated liquid back to the tank through a return pipe. This installation is characterized in that the feeding pipe has at least one zone situated at a lower level than the tank level and that is provided with two conduits arranged parallel, and a second pump arranged on one of the two conduits.
REFERENCES:
patent: 2833374 (1958-05-01), Glasser
patent: 3056500 (1962-10-01), Carter
patent: 3166095 (1965-01-01), Gegenheimer et al.
patent: 3332435 (1967-07-01), Anderson et al.
patent: 3851662 (1974-12-01), Jessop
patent: 4295913 (1981-10-01), Purr et al.
patent: 4312586 (1982-01-01), Ohtani
patent: 4324481 (1982-04-01), Becherer
patent: 4421399 (1983-12-01), Steube
patent: 4506986 (1985-03-01), Freeman
patent: 4705379 (1987-11-01), Kobayashi et al.
patent: 5018551 (1991-05-01), Pelissier
patent: 5054519 (1991-10-01), Berman
patent: 5057858 (1991-10-01), Woog
patent: 5203367 (1993-04-01), Akai et al.
patent: 5933674 (1999-08-01), Fyson
patent: DE 423 204 C (1925-12-01), None
Clavellier Gilles
Poncelet Olivier
Thevenet Pierre
Eastman Kodak Company
Rivell John
Woods David M.
LandOfFree
Processing installation for rinsing water having an... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Processing installation for rinsing water having an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processing installation for rinsing water having an... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2504339