Automatic metering equipment for the addition of chemical components maintaining volumes in proportion at all times in units for the automatic developing of photographic films and the like

摘要

Automatic metering equipment for the addition of chemical developer and fixing components to the corresponding trays in units for the continuous developing of photographic or radiographic films and the like comprising a containing and supporting box body in which are positioned at least one drum or bottle for the concentrated developer component, at least one drum containing the concentrated chemical fixing component and a separate reservoir for the mixing water, each of the said individual drums and the said tank being associated with a constant flow pump of the type having two coaxial bellows, of which pumps one is provided for metering of the chemical developer components through separately sucking up the chemicals and water into the said bellows and the other for metering the chemical fixing components and water by sucking these up into its own two bellows, mixing taking place within separate pipes capable of adding the developing mixture to the developing tray and the fixing mixture to the fixing tray, the suction ratios for the two bellows of each of the said two pumps being adjustable in such a way that the delivery of the same can be varied by altering the operating times of the said pumps by means of a suitably programmed microprocessor. IMAGE