Patent
1994-06-09
1996-04-23
Rutledge, D.
354325, G03D 302
Patent
active
055108725
ABSTRACT:
The level of chemical treatment baths is automatically, compensated, in film developing machines. A vessel (90) contains a supply of water which is directed by a pump (50) and a pipeline (51) through a manifold (7) to baths (11, 12, 13, 14, 15) by way of feed pipelines (71, 72, 73, 74, 75). Each pipeline is controlled by respective solenoid valve (61, 62, 63, 64, 65) controlled to operate simultaneously with the pump (50) by way of an electronic control unit (41) in receipt of signals relayed from sensors (21, 22, 23, 24, 25) designed to detect a drop in the level of the solutions in the baths (11, 12, 13, 14, 15). The feed outlets of the pipelines (71, 72, 73, 74 75) discharge above the level of the baths (11, 12, 13, 14, 15) so as to prevent any possibility of reflux. In the case of the pipeline (75) serving the final bath (15), water is supplied by way of a tubular element (81) with holes (85) strategically placed to generating jets directed onto at least one roller (321) of a set of paired squeeze rollers (32).
REFERENCES:
patent: 4371250 (1983-02-01), Wakabayshi et al.
patent: 4839683 (1989-06-01), Kushima et al.
patent: 5059998 (1991-10-01), Sasaki et al.
patent: 5369458 (1994-11-01), Wernicke et al.
patent: 5379085 (1995-01-01), Matsuda et al.
Bravin Daniele
Franci Giosue
Lant Danny
Pessot Ennio
Raus Dragan
Rutledge D.
San Marco Imaging S.r.l.
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